Kuang-Fei Lin

East China University of Science and Technology, Shanghai, Shanghai Shi, China

Are you Kuang-Fei Lin?

Claim your profile

Publications (24)50.76 Total impact

  • Dong Zhou · Jie Yang · Hui Li · Qiang Lu · Yong-di Liu · Kuang-Fei Lin ·
    [Show abstract] [Hide abstract]
    ABSTRACT: In order to understand how bisphenol A (BPA) exposure acts on the evolutionary dynamics of populations and changes of stress response across generations, the model animal Caenorhabditis elegans was used to conduct the multigenerational testing. Multiple endpoints at the physiological (growth, reproduction, and locomotion behaviors) and molecular (stress-related gene expressions) levels were examined by multigenerational exposure to low-concentration BPA (0.001-10 μM) across four generations. The results showed that changes of physiological-level effects across four generations varied in magnitude and direction, depending on the exposure concentrations. C. elegans individuals in the first generation grew smaller, moved slower, and produced less offsprings than the controls by BPA exposure. As for each trait tested, the first generation response could be commonly mirrored in the subsequent generations at the highest concentration of 10 μM. However, at lower concentrations, response of parental generation was a relatively poor predictor of the effects on progeny, as acclimation or cumulative damage could occur in the subsequent generations. The integrated gene expression profiles visually illustrated that the tested gene expressions at low concentrations (0.001-0.01 μM) were more obviously changed in both G1 and G4 generations, and the G1 generation showed a much greater degree of increase in stress-related gene expressions than the G4 generation. The multigenerational toxicity data emphasize the need of considering biological effects over multiple generations to conduct accurate assessment of environmental risks of toxicants on population dynamics.
    Environmental Pollution 11/2015; DOI:10.1016/j.envpol.2015.10.057 · 4.14 Impact Factor
  • Source
    Qiang Lu · Rui-Li Zhu · Jie Yang · Hui Li · Yong-Di Liu · Shu-Guang Lu · Qi-Shi Luo · Kuang-Fei Lin ·
    [Show abstract] [Hide abstract]
    ABSTRACT: Natural attenuation is an effective and feasible technology for controlling groundwater contamination. This study investigated the potential effectiveness and mechanisms of natural attenuation of 1,1,1-trichloroethane (TCA) contaminants in shallow groundwater in Shanghai by using a column simulation experiment, reactive transport model, and 16S rRNA gene clone library. The results indicated that the majority of the contaminant mass was present at 2–6 m in depth, the contaminated area was approximately 1000 m × 1000 m, and natural attenuation processes were occurring at the site. The effluent breakthrough curves from the column experiments demonstrated that the effectiveness of TCA natural attenuation in the groundwater accorded with the advection-dispersion-reaction equation. The kinetic parameter of adsorption and biotic dehydrochlorination of TCA was 0.068 m3/kg and 0.0045 d–1. The contamination plume was predicted to diminish and the maximum concentration of TCA decreased to 280 μg/L. The bacterial community during TCA degradation in groundwater belonged to Trichococcus, Geobacteraceae, Geobacter, Mucilaginibacter, and Arthrobacter.
    Frontiers in Microbiology 08/2015; 6. DOI:10.3389/fmicb.2015.00839 · 3.99 Impact Factor
  • Source
    Zhi-Yan Lu · Xiao-Jue Guo · Hui Li · Zhong-Zi Huang · Kuang-Fei Lin · Yong-Di Liu ·
    [Show abstract] [Hide abstract]
    ABSTRACT: A high-throughput screening system for moderately halophilic phenol-degrading bacteria from various habitats was developed to replace the conventional strain screening owing to its high efficiency. Bacterial enrichments were cultivated in 48 deep well microplates instead of shake flasks or tubes. Measurement of phenol concentrations was performed in 96-well microplates instead of using the conventional spectrophotometric method or high-performance liquid chromatography (HPLC). The high-throughput screening system was used to cultivate forty-three bacterial enrichments and gained a halophilic bacterial community E3 with the best phenol-degrading capability. Halomonas sp. strain 4-5 was isolated from the E3 community. Strain 4-5 was able to degrade more than 94% of the phenol (500 mg·L-1 starting concentration) over a range of 3%-10% NaCl. Additionally, the strain accumulated the compatible solute, ectoine, with increasing salt concentrations. PCR detection of the functional genes suggested that the largest subunit of multicomponent phenol hydroxylase (LmPH) and catechol 1,2-dioxygenase (C12O) were active in the phenol degradation process.
    International Journal of Molecular Sciences 06/2015; 16(6):11834-48. DOI:10.3390/ijms160611834 · 2.86 Impact Factor
  • [Show abstract] [Hide abstract]
    ABSTRACT: An investigation of polybrominated diphenyl ethers (PBDEs) in Eurasian Tree Sparrow (Passer montanus) samples (n=37) collected from different land use areas in Shanghai provided information about the levels, compositional patterns, geographical distribution, potential sources of PBDEs and the evaluation of contamination status in Shanghai. The concentrations of BDE 209 and Sum-PBDEs were within the range of 8.20-292.0ngg(-1)lw (median: 47.0ngg(-1)lw) and 33.16-375.63ngg(-1)lw (median: 78.7ngg(-1)lw), respectively. As the predominant individual congener, BDE 209 was detected in all samples with a mean percentage of 62.8%, followed by BDE 47, 99 and 100 sequentially. The geographical distribution of PBDEs in ETS muscles followed the order below: landfill>urban>industrial parks>suburban>rural>remote, indicating that Shanghai Laogang Municipal Landfill was an important emission source of PBDEs in Shanghai, and also the PBDE levels were in association with urbanization and industrialization. Compared with other regions, contamination status in Shanghai was relatively good with the exception of these high concentration areas. There was significant correlation (r(2)=0.89, P<0.01) between PBDEs concentrations in soil and ETS, indicating ETS could be used as a useful biomonitoring tool for PBDEs in Shanghai. Copyright © 2014 Elsevier Ltd. All rights reserved.
    Chemosphere 02/2015; 126C:25-31. DOI:10.1016/j.chemosphere.2014.12.044 · 3.34 Impact Factor
  • Zhong-zi Huang · Ping Wang · Hui Li · Kuang-fei Lin · Zhi-yan Lu · Xiao-jue Guo · Yong-di Liu ·
    [Show abstract] [Hide abstract]
    ABSTRACT: A moderately halophilic bacterial enrichment was able to degrade 120 mg/L of phenol in the presence of 1–2 M of NaCl within 3 d or 2.5–3 M of NaCl within 6 d. The optimal degradation was achieved at 1.5 M of NaCl and 350 mg/L of phenol. PCR-DGGE profile of the enrichment showed that the Acidobacterium sp. and Chloroflexus sp. dominated the community. The phenol-biodegradation pathways consisted of an initial oxidative attack by phenol hydroxylase, and subsequent ring fission by catechol 1,2-dioxygenase and catechol 2,3-dioxygenase. Nuclear magnetic resonance (NMR) spectroscopy profiles showed that ectoine and hydroxyectoine were the main compatible solutes to adjust the bacterial osmotic pressure. This study provides further information on the understanding of phenol-degradation over a wide range of salinity and remediation of phenol as a pollutant in the environment.
    International Biodeterioration & Biodegradation 10/2014; 94:115–120. DOI:10.1016/j.ibiod.2014.07.003 · 2.13 Impact Factor
  • [Show abstract] [Hide abstract]
    ABSTRACT: Abstract Trichloroethylene (TCE) and phenol were often found together as cocontaminants in the groundwater of industrial contaminated sites. An effective method to remove TCE was aerobic biodegradation by co-metabolism using phenol as growth substrates. However, the aerobic biodegradation process was easily limited by low concentration of dissolved oxygen (DO) in groundwater, and DO was difficultly improved by air blast technique. This study enriched a bacterial community using hydrogen peroxide (H2O2) as the sole oxygen source to aerobically degrade TCE by co-metabolism with phenol in groundwater. The enriched cultures were acclimatized to 2-8 mM H2O2 which induced catalase (CAT), superoxide dismutase (SOD) and peroxidase (POD) to decompose H2O2 to release O2 and reduce the toxicity. The bacterial community could degrade 120 mg/L TCE within 12 d by using 8 mM H2O2 as the optimum concentration, and the TCE degradation efficiency reached up to 80.6%. 16S rRNA gene cloning and sequencing showed that Bordetella, Stenotrophomonas sp., Sinorhizobium sp., Variovorax sp. and Sphingobium sp. were the dominant species in the enrichments, which were clustered in three phyla: Alphaproteobacteria, Betaproteobacteria and Gammaproteobacteria. Polymerase chain reaction detection proved that phenol hydroxylase (Lph) gene was involved in the co-metabolic degradation of phenol and TCE, which indicated that hydroxylase might catalyzed the epoxidation of TCE to forming the unstable molecule TCE-epoxide. The findings are significant for understanding the mechanism of biodegradation TCE and phenol cocontamination and helpful for the potential applications of an aerobic bioremediation in situ the contaminated sites.
    Environmental Technology 09/2014; 36(5):1-22. DOI:10.1080/09593330.2014.957730 · 1.56 Impact Factor
  • [Show abstract] [Hide abstract]
    ABSTRACT: Sequencing batch reactors (SBRs) were used to degrade phenol compounds efficiently; however, most investigations on such reactors have focused on fresh rather than saline wastewaters, even though saline effluents containing phenolic compounds are generated by many industries. This study assessed the performance of the aerobic SBR process in the removal of phenol as the sole substrate under conditions of high salinity. A flexible concentration of phenol could be completely degraded in SBR process, varied from 400 mg l−1 to 1200 mg l−1 at the existing of 80 g l−1 NaCl. The value of specific oxygen uptake rate (SOUR) suggested that the exiting bacteria could adapt to the phenol and salt conditions well at each stage. Cloning and sequencing of the 16S rRNA showed that the acclimated active sludge included two dominant genera: Pseudomonas and Alcaligenes. PCR detection of the functional genes suggested that phenol hydroxylase (Lph), catechol 1,2-dioxygenase (C12O), and catechol 2,3-dioxygenase (C23O) were active in the phenol-degradation process. Real-time PCR showed that the phenol-degrading bacteria comprised 63.3% of the total bacterial community.
    International Biodeterioration & Biodegradation 09/2014; 93:138–144. DOI:10.1016/j.ibiod.2014.04.010 · 2.13 Impact Factor
  • [Show abstract] [Hide abstract]
    ABSTRACT: The concentration and distribution of PBDEs in liver, heart, brain, egg and muscle tissues of market farmed fish and wild river fish (crucian carp) from Taizhou, which is a large e-waste recycling site in China, were quantitatively measured using gas chromatography -negative chemical ion tandem mass spectrometry (GC-NCI-MS). The dietary intake of PBDEs via the consumption of fish by the population of this region was also estimated. The results showed that the concentrations of PBDEs in the muscle of river fish samples near the e-waste recycling site were significantly higher than those in the market farmed fish without obviously polluted sources of PBDEs. The distribution of PBDEs in various tissues was not even, and the highest and lowest mean concentrations of total PBDEs ( sigma PBDEs) were 18.82 ng x g(-1) and 1.97 ng x g(-1) (wet weight), in heart and egg tissues, respectively. A similar PBDE congener profiles in different tissues of farmed fish were found. Among PBDE congeners, BDE-47 was predominant in various tissues accounting for above 50% of the total PBDEs, and followed by BDE-183 (about 20%), BDE-99 and BDE-153. While different profiles of PBDEs in muscle tissues between wild fish in river and market farmed fish were observed, that BDE-47, -153 and -99 were dominant for the former type. These facts suggested primitive e-waste recycling behavior to be a pollution source of high levels of PBDEs in wild fish. The average estimated daily intake of PBDEs via river fish consumption by local residents near the e-waste recycling site in Taizhou was approximately 29.0 ng, slightly higher than that in other regions.
    Huan jing ke xue= Huanjing kexue / [bian ji, Zhongguo ke xue yuan huan jing ke xue wei yuan hui "Huan jing ke xue" bian ji wei yuan hui.] 08/2014; 35(8):3175-82. DOI:10.13227/j.hjkx.2014.08.048
  • [Show abstract] [Hide abstract]
    ABSTRACT: Chlorinated hydrocarbons are the most common organic pollutants in groundwater systems worldwide. In this study, we developed bio-beads with immobilized anaerobic bacteria, zero-valent iron (ZVI), and activated carbon (AC) powder and evaluated their efficacy in removing 1,1,1-trichloroethane (TCA) from groundwater. Bio-beads were produced by polyvinyl alcohol, alginate, and AC powder. We found that the concentration of AC powder used significantly affected the mechanical properties of immobilized bio-beads and that 1.0 % (w/v) was the optimal concentration. The bio-beads effectively degraded TCA (160 mg L(-1)) in the anaerobic medium and could be reused up to six times. The TCA degradation rate of bio-beads was 1.5 and 2.3 times greater, respectively, than ZVI + AC treatment or microbes + AC treatment. Measuring FeS produced by microbial reactions indicated that TCA removal occurred via FeS-catalyzed dechlorination. Analysis of clonal libraries derived from bio-beads demonstrated that the dominant species in the community were Betaproteobacteria and Gammaproteobacteria, which may contribute to the long-term stability of ZVI reactivity during TCA dechlorination. This study shows that the combined use of immobilized anaerobic bacteria, ZVI, and AC in bio-beads is effective and practical for TCA dechlorination and suggests they may be applicable towards developing a groundwater treatment system for the removal of TCA.
    Environmental Science and Pollution Research 06/2014; 21(19). DOI:10.1007/s11356-014-3110-6 · 2.83 Impact Factor
  • Wei Zhang · Bang Xiong · Wen-Fang Sun · Shuai An · Kuang-Fei Lin · Mei-Jin Guo · Xin-Hong Cui ·
    [Show abstract] [Hide abstract]
    ABSTRACT: The acute and chronic toxic effects of Bisphenol A (BPA) on Chlorella pyrenoidosa (C. pyrenoidosa) and Scenedesmus obliquus (S. obliquus) were not well understood. The indoor experiments were carried out to observe and analyze the BPA-induced changes. Results of the observations showed that in acute tests BPA could significantly inhibit the growth of both algae, whereas chronic exposure hardly displayed similar trend. Superoxide dismutase (SOD) and Catalase (CAT) activities of both algae were promoted in all the treatments. Chlorophyll a synthesis of the two algae exhibited similar inhibitory trend in short-term treatments, and in chronic tests C. pyrenoidosa hardly resulted in visible influence, whereas in contrast, dose-dependent inhibitory effects of S. obliquus could be clearly observed. The experimental results indicated that the growth and Chlorophyll a syntheses of S.obliquus were more sensitive in response to BPA than that of C. pyrenoidosa, whereas for SOD andCAT activities, C. pyrenoidosa was more susceptible. This research provides a basic understanding of BPA toxicity to aquatic organisms. © 2012 Wiley Periodicals, Inc. Environ Toxicol, 2012.
    Environmental Toxicology 06/2014; 29(6). DOI:10.1002/tox.21806 · 3.20 Impact Factor
  • Lin Hu · Zhao-Fu Qiu · Long He · Ying Dou · Shu-Guang Lü · Qian Sui · Kuang-Fei Lin ·
    [Show abstract] [Hide abstract]
    ABSTRACT: Sorption and desorption play an important role in the transport and the fate of tetrachloroethylene (PCE) in soil. In order to examine influences of different soil compositions on PCE sorption-desorption, equilibrium batch experiments were carried out using four sorbents (natural soil with 2.23% total organic carbon (TOC), H2O2-treated soil, 375 degrees C-treated soil and 600 degrees C-treated soil) with different initial PCE liquid concentrations (c0). The effects of main parameters (TOC, soft carbon, hard carbon, minerals, c0) on PCE sorption-desorption were investigated. At 16 degrees C, when c0 was increased from 5 to 80 mg x L(-1), the results showed that sorption and desorption isotherms of PCE on four sorbents can be best described by the Freundlich model (r2 > 0.96). The sorption contribution rate of SOM was higher than 60% in natural soil, and hard carbon was the main influencing factor,while the desorption contribution rate of SOM was close to that of minerals in natural soil, and soft carbon accounted for more than 80% in the total desorption contribution rate of SOM. In addition, the higher the c0, the higher the sorption contribution rate of PCE in hard carbon and desorption contribution rate of PCE in soft carbon and minerals were. Moreover, desorption of PCE from four sorbents exhibited hysteresis, and hard carbon played a remarkable role in the hysteresis of natural soil.
    Huan jing ke xue= Huanjing kexue / [bian ji, Zhongguo ke xue yuan huan jing ke xue wei yuan hui "Huan jing ke xue" bian ji wei yuan hui.] 12/2013; 34(12):4635-41.
  • [Show abstract] [Hide abstract]
    ABSTRACT: Greater exposure to Pb(II) increases the likelihood of harmful effects in the environment. In this study, the aquatic unicellular alga Chlorella protothecoides (C. protothecoides) and Chlorella vulgaris (C. vulgaris) were chosen to assess the acute and chronic toxicity of Pb(II) exposure. Results of the observations show dose-response relationships could be clearly observed between Pb(II) concentration and percentage inhibition (PI). Exposure to Pb(II) increased malondialdehyde (MDA) content by up to 4.22 times compared with the control, suggesting that there was some oxidative damage. ANOVA analysis shows that Pb(II) decreased chlorophyll (chl) content, indicating marked concentration-dependent relationships, and the lowest levels of chl a, chl b, and total-chl were 14.53, 18.80, and 17.95% of the controls, respectively. A real-time PCR assay suggests the changes in transcript abundances of three photosynthetic-related genes. After 120 h exposure Pb(II) reduced the transcript abundance of rbcL, psaB, and psbC, and the relative abundances of the three genes of C. protothecoides and C. vulgaris in response to Pb(II) were 54.66-98.59, 51.68-95.59, 37.89-95.48, 36.04-94.94, 41.19-91.20, and 58.75-96.80% of those of the controls, respectively. As for 28 d treatments, the three genes displayed similar inhibitory trend. This research provides a basic understanding of Pb(II) toxicity to aquatic organisms. © 2013 Wiley Periodicals, Inc. Environ Toxicol, 2013.
    Environmental Toxicology 04/2013; 29(11). DOI:10.1002/tox.21865 · 3.20 Impact Factor
  • [Show abstract] [Hide abstract]
    ABSTRACT: This study investigated the effects of PCE and 2-CP co-contamination on growth of microbial community in terms of enzymatic activity and microbial diversity in activated sludge. Results showed that the activities of three key enzymes (dehydrogenase, phosphatase and urease) decreased significantly when PCE (in the range of 5-150mg/L) was mixed with 2-CP (in the range of 25-150mg/L). Especially, activity of dehydrogenase decreased by more than 93% as the concentration of PCE and 2-CP both reached 150mg/L. PCR-DGGE revealed that short-term exposure with PCE and 2-CP did not lead to shift in the microbial community structure, while clone library demonstrated a significant change in the microbial diversity after long-term exposure. As the population of Alphaproteobacteria and Gamaproteobacteria decreased, with Actinobacteria eventually disappeared, species including Firmicutes, Bacteroidetes and Synergistetes became dominating groups. This study demonstrated that co-contamination with PCE and 2-CP affected the performance of activated sludge in a significant way.
    Bioresource Technology 02/2013; 137C:286-293. DOI:10.1016/j.biortech.2013.02.050 · 4.49 Impact Factor
  • Kai Huang · Jie Guo · Kuang-Fei Lin · Xiao-Yu Zhou · Jun-Xia Wang · Peng Zhou · Feng Xu · Mei-Lan Zhang ·
    [Show abstract] [Hide abstract]
    ABSTRACT: The scarcity of information on polybrominated diphenyl ethers' (PBDEs) flow in landfill restricts the life cycle analysis of PBDEs. In this study, eight PBDE congeners (BDEs 28, 47, 99, 100, 153, 154, 183, and 209) in topsoil, vegetation leaves, leachate, and municipal aged refuse collected from Shanghai Laogang Municipal Landfill (SLML) were investigated. The present study revealed elevated PBDE concentrations in topsoil and proved PBDE leakage from SLML and vegetation uptake. BDE-209 was the predominant congener, and this could be due to massive usage of deca-BDE mixture in Shanghai. ΣPBDE concentrations in leachates treated by reed wetland and A(2)/O process fell in the low end of the worldwide range. ΣPBDE concentrations in aged refuse samples rose from under 50 ng/g dw in 1989 to the range of 5,150-5,718 ng/g dw in 2002. PBDE concentrations increase in aged refuse samples throughout the 1990s into the 2000s paralleled municipal solid waste output from 1991 to 2002 in Shanghai. Exponential increase in BDE-209 concentration in aged refuse suggested the increasing market demands for deca-BDE mixture after 1990 in China. Notably, the inventory of PBDEs in SLML was 28.7 MT, and the doubling time of BDE-209 in aged refuse was calculated to be 1.6 year. SLML can be considered as a source of PBDE and one main recipient of PBDE as well, receiving inputs predominantly from the PBDE-containing waste. Priority should be given to formulate regulation on PBDEs and sorting work before landfill disposal.
    Environmental Science and Pollution Research 02/2013; 20(8). DOI:10.1007/s11356-013-1489-0 · 2.83 Impact Factor
  • Wei ZHANG · Kuang-Fei LIN · Sha-Sha YANG · Meng ZHANG ·
    [Show abstract] [Hide abstract]
    ABSTRACT: Perfluorooctanoic acid (PFOA) is a popular additive of the chemical industry; its effect on activities of important soil enzymes is not well understood. A laboratory incubation experiment was carried out to analyze the PFOA-induced changes in soil urease, catalase, and phosphatase activities. During the entire incubation period, the activities of the three soil enzymes generally declined with increasing PFOA concentration, following certain dose-response relationships. The values of EC10, the contaminant concentration at which the biological activity is inhibited by 10%, of PFOA for the soil enzyme activity calculated from the modeling equation of the respective dose-response curve suggested a sensitivity order of phosphatase > catalase > urease. The effect of PFOA on soil enzyme activities provided a basic understanding of the eco-toxicological effect of PFOA in the environment. Results of this study supported using soil phosphatase as a convenient biomarker for ecological risk assessment of PFOA-polluted soils.
    Pedosphere 02/2013; 23(1):120–127. DOI:10.1016/S1002-0160(12)60087-3 · 1.50 Impact Factor
  • [Show abstract] [Hide abstract]
    ABSTRACT: Alkane-degrading bacteria are crucial in the bioremediation of petroleum contamination from soil and groundwater. The alkane monooxygenase (alkB) gene encoding the Alk enzyme involved in aerobic degradation is a potentially functional gene biomarker for the detection of alkane-degrading bacteria. This study describes a denaturing gradient gel electrophoresis (DGGE) assay to facilitate the rapid and sensitive detection of alkB genes in wastewater from oilfield. The results showed that the presence of a considerable genetic diversity of alkB genes in the wastewater as evidenced by a total of 13 unique DNA bands detected. These alkB genes belong to nine genera, including Acinetobacter, Alcanivorax, Acidisphaera, Burkholderia, Geobacillus, Marinobacter, Mycobacterium, Pseudomonas, Rhodococcus and Xanthobacter. The abundance of alkane-degrading bacteria and total bacteria was calculated to range from 1.46 × 103 to 9.89 × 104 cell ml−1 and from 1.18 × 104 to 6.29 × 105 cells ml−1, respectively. The distribution of alkane-degrading bacteria was positively correlated with the environmental temperature and the specific types of n-alkanes in the wastewaters. Our results suggest that alkB-based DGGE methods could describe the diverse alkane-degrading bacteria in oil-degrading community, which may improve the understanding of the treatment for oil-polluted wastewater.
    International Biodeterioration & Biodegradation 01/2013; 76:49-57. DOI:10.1016/j.ibiod.2012.06.007 · 2.13 Impact Factor
  • [Show abstract] [Hide abstract]
    ABSTRACT: Adsorption plays an important role in the transport and the fate of trichloroethylene (TCE) in soil. Six types of soil, including two types of natural soil with different organic carbon content and four types of soil with the low aggregation of "soft carbon" pre-treated by hydrogen peroxide or with all organic carbon removed by high temperature ignition from the original soil, were adopted as adsorbents. The effects of parameters (organic carbon content and composition, minerals, the initial TCE concentration, solution pH, moisture content and ionic strength) on TCE adsorption capacity were examined. The results showed that the soil adsorption isotherm was non-linear within the experimental range. The TCE adsorption capacity was increased and the contribution rate of the minerals to the sorption was reduced with the increase of the organic carbon content. The adsorption of TCE in the soil was the result of the combined action of both organic carbon and minerals, in which organic carbon played a major part, whereas the role of minerals could not be neglected. As the initial TCE concentration increased, the contribution rate of the minerals to the sorption went down. The adsorption isotherm of "soft carbon" was linear, while the "hard carbon" was non-linear. Moreover, the adsorption capacity was increased by increasing the ionic strength. In contrast, neither pH nor moisture content had any influence on TCE adsorption.
    Huan jing ke xue= Huanjing kexue / [bian ji, Zhongguo ke xue yuan huan jing ke xue wei yuan hui "Huan jing ke xue" bian ji wei yuan hui.] 11/2012; 33(11):3976-82.
  • [Show abstract] [Hide abstract]
    ABSTRACT: Quantum dots (QDs) have strong adsorption capacity; therefore, their potential toxicity to aquatic organisms from the facilitated transport of other trace toxic pollutants when they coexist has received increasing interest. However, the impact of cadmium selenium (CdSe) QDs and copper ion (Cu(2+)) joint exposure on zebrafish (Danio rerio) embryo and larvae remains almost unknown. Therefore, the present study was performed to determine the developmental toxicities to zebrafish exposed to combined pollution with CdSe QDs (500 µg/L) and Cu(2+) (0, 0.1, 1, 10, and 100 µg/L CuC1(2)) compared with single exposure. Our findings for the first time revealed that: (1) QDs facilitated the accumulation of Cu(2+) in zebrafish; (2) QDs caused higher mortality, lower hatch rate, and more malformations of the exposed zebrafish; (3) junction, bifurcation, crossing, particles, and aggregation of the exposed FLI-1 transgenic zebrafish larvae can be observed; (4) embryo cell apoptosis appeared in the head and tail region; and (5) synergistic effects played an important role during joint exposure. These observations provide a basic understanding of CdSe QDs and Cu(2+) joint toxicity to aquatic organisms and suggest the need for additional research to identify the toxicological mechanism.
    Environmental Toxicology and Chemistry 09/2012; 31(9):2117-23. DOI:10.1002/etc.1918 · 3.23 Impact Factor
  • [Show abstract] [Hide abstract]
    ABSTRACT: This study focused on acclimating a microbial enrichment to biodegrade benzene, toluene, ethylbenzene and xylenes (BTEX) in a wide range of salinity. The enrichment degraded 120mg/L toluene within 5d in the presence of 2M NaCl or 150mg/L toluene within 7d in the presence of 1-1.5M NaCl. PCR-DGGE (polymerase chain reaction-denatured gradient gel electrophoresis) profiles demonstrated the dominant species in the enrichments distributed between five main phyla: Gammaproteobacteria, Sphingobacteriia, Prolixibacter, Flavobacteriia and Firmicutes. The Marinobacter, Prolixibacter, Balneola, Zunongwangia, Halobacillus were the dominant genus. PCR detection of genotypes involved in bacterial BETX degradation revealed that the degradation pathways contained all the known initial oxidative attack of BTEX by monooxygenase and dioxygenase. And the subsequent ring fission was catalysed by catechol 1,2-dioxygenase and catechol 2,3-dioxygenase. Nuclear magnetic resonance (NMR) spectroscopy profiles showed that the bacterial consortium adjusted the osmotic pressure by ectoine and hydroxyectoine as compatible solutes to acclimate the different salinity conditions.
    Bioresource Technology 08/2012; 124:129-36. DOI:10.1016/j.biortech.2012.08.033 · 4.49 Impact Factor
  • Wei Zhang · Bang Xiong · Kuang-Fei Lin · Hai-Fang Li · Mei-Jin Guo · Xin-Hong Cui · Bin Wang ·
    [Show abstract] [Hide abstract]
    ABSTRACT: A laboratory simulation experiment was conducted to study the release of sediment phosphorous and nitrogen under the effects of coating the sediment with plastic, clinoptilolite, calcite, quartz sand, and calcium nitrate, aimed to provide scientific basis and technical support to control the sediment nutrient release under the background of water environment pollution by different concentrations of nitrogen and phosphorus. The control efficacy of test coating materials for sediment total phosphorous release was in the order of plastic > calcium nitrate > clinoptilolite > calcite > quartz sand, and that for sediment total nitrogen release was in the order of clinoptilolite > plastic > calcite > quartz sand > calcium nitrate. As for the release of sediment NO(3-)-N, the control efficacy of test coating materials was calcium nitrate > quartz sand > clinoptilolite > calcite > plastic coating; whereas for the release of sediment NH(4+)-N, the sequence was calcium nitrate > plastic coating > clinoptilolite > calcite > quartz sand. Water temperature had definite relativity to the sediment nutrient release. With the increase of water temperature, the concentrations of water total phosphorous and nitrogen and NO(3-)-N increased, while the concentration of water NH(4+)-N presented a declining trend.
    Ying yong sheng tai xue bao = The journal of applied ecology / Zhongguo sheng tai xue xue hui, Zhongguo ke xue yuan Shenyang ying yong sheng tai yan jiu suo zhu ban 06/2012; 23(6):1677-81.