Fei Ge

Xiangtan University, Siangtan, Hunan, China

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Publications (41)126.31 Total impact

  • [Show abstract] [Hide abstract]
    ABSTRACT: By using electrochemical techniques and conventional chemical leaching approach, the potential of organosilane coatings to suppress the pyrite oxidation under acidic conditions was investigated, including γ-mercaptopropyltrimethoxysilane (PropS-SH), γ-aminopropyltrimethoxysilane (APS) and vinyltrimethoxysilane (VTMS). The coated pyrite samples were analyzed by Fourier transforms infrared reflection (FT-IR) spectroscopy and X-ray photoelectron spectrometer (XPS). The results from electrochemical tests have indicated that all the studied coatings could suppress the oxidation of pyrite and the inhibition efficiency should follow the sequence of PropS-SH > VTMS > APS. The results of chemical leaching experiments have showed that pyrite oxidation was decreased by 49.4%, 71.4% and 89.2% (based on Fe release) respectively by using APS, VTMS and PropS-SH coatings. The mechanism of inhibition action could possibly be the formation of a cross-linking network of Si–O–Si and Si–O–Fe bonds on the pyrite surface which could restrain the permeation of aggressive species.
    Minerals Engineering. 03/2015; 72.
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    ABSTRACT: A pH-dependent enhancement effect of a co-cultured bacterium Bacillus licheniformis on nutrient removal by a green alga Chlorella vulgaris was evaluated in a 6-day experiment. In the single algal system, steady removal efficiencies of ammonia nitrogen (NH4-N) and total phosphorus (TP) were achieved at 63 and 91% with 10 × 105 algal cells mL−1, meanwhile the optimal removal rates of NH4-N and TP were achieved at 10.2 and 7.3 mg 10−10 cells day−1 with initial concentrations of 10 mg L−1 NH4-N and 2 mg L−1 TP, respectively. In the bacteria-co-cultured algal system, the removal efficiency of NH4-N was significantly increased to 78% with an algae/bacteria cell density ratio of 1:1, compared with 63% in the single algal system under the same conditions. However, a decrease in pH was detected in the algal-co-cultured system and the removal efficiency of NH4-N could be raised to 86% by regulating pH from acidic (pH 3.5) to neutral. Furthermore, algal cells in the pH-unregulated algal-co-cultured system (acid medium) were observed as close-grained spheres by scanning electron microscopy (SEM), while cells were wrinkled in the pH-regulated algal-co-cultured system (neutral medium) at the end of tests. These results suggest a potential application of bacteria-co-cultured algal system for effective nutrient removal from wastewater by adjusting pH (base addition) during the process.
    Ecological Engineering 02/2015; 75. · 3.04 Impact Factor
  • Applied Catalysis B Environmental 11/2014; s 160–161:115–121. · 6.01 Impact Factor
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    ABSTRACT: Hydroxy iron–aluminum pillared bentonite (FeAlPBent) was synthesized with ion exchange method. The catalysts were characterized by X-ray diffraction (XRD), X-ray fluorescence (XRF), BET, UV–vis diffuse spectra. The photo-Fenton catalytic activity of FeAlPBent was tested under a different reaction condition using azocarmine B (ACB) as model pollutant under simulated solar light irradiation. Response surface methodology based on Box–Behnken design was employed to investigate the effects of process variables on the removal of azocarmine B. The results indicated that hydroxy aluminum iron ions intercalated into the interlayer spaces of bentonite successfully and FeAlPBent had high photocatalytic activity. The optimum conditions for ACB removal were dye concentration of 80 mg/L ACB, pH 3, H2O2 concentration of 20 mM and catalyst dosage of 0.6 g/L. Under these conditions, the maximum ACB decolorization efficiency and TOC removal were 99.3% and 73.9%, respectively. In addition, the experiments also illustrated that FeAlPBent had a long-term stability. Furthermore, a tentative pathway for the oxidative degradation of ACB was postulated by Gaussian calculation and GC–MS analysis.
    Applied Clay Science 10/2014; · 2.70 Impact Factor
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    ABSTRACT: Hydroxymetal-clay complexes, which contain reactive surface hydroxyl groups, have a strong affinity for both heavy-metal cations and oxyanions and hence can serve as efficient sorbents for ionic contaminants. The co-sorptive behavior of heavy-metal cations and oxyanions on the surface of hydroxymetal-clay complexes is not well understood, however. The objective of the present investigation was to help bridge that gap by determining the feasibility of co-sorbing Cd cations and phosphate from aqueous solution to a hydroxyiron-montmorillonite complex (HyFe-mont). A montmorillonite-rich clay from Inner Mongolia, China, was the starting material. The results showed that Cd and phosphate could be sorbed, simultaneously and synergistically, to HyFe-mont without a change in solution pH. Similarly, when phosphate was sorbed before Cd, the sorption capacities were comparable to those obtained in the simultaneous sorption experiment, and the solution pH did not change. When Cd was pre-sorbed, however, the subsequent sorption of both Cd and phosphate decreased as did solution pH. X-ray photoelectron spectroscopy (XPS) indicated that the binding energies of P2p, Cd3/2, and Cd5/2 were of similar magnitude for both the simultaneous sorption system and the phosphate pre-sorbed system. In addition, the single Cd and Cd pre-sorbed systems had similar Cd3/2 and Cd5/2 binding energies. The combined sorption and XPS results suggested that sorbed phosphate and Cd formed P-bridged ternary complexes on the HyFe-mont surface, contributing to the synergistic uptake of the contaminants in the simultaneous sorption system.
    Clays and Clay Minerals 04/2014; 62(2). · 1.40 Impact Factor
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    ABSTRACT: The adsorptive behaviors of crystal violet (CV), cetyltrimethylammonium (CTMA), and 2-naphthol to montmorillonite (Mt) using a simultaneous-adsorption process were studied in this work. The adsorption results showed that under the experimental concentrations both CV and CTMA were almost completely removed by Mt. XRD and FTIR characterization results showed that the adsorbed CV and CTMA formed CTMA–CV aggregates within the interlayer spaces of Mt, and these aggregates served as accommodation spaces for the adsorption of 2-naphthol. The adsorption isotherms of 2-naphthol fitted linear equation well in the simultaneous-adsorption process, suggesting that partition should be the dominant mechanism for uptaking 2-naphthol. Combining the fact that CV alone formed aggregates showed nonlinear adsorption isotherms and much weaker adsorption capacity towards 2-naphtol than CTMA alone formed aggregates, one would expect that CTMA played a dominant role in the adsorption of 2-naphthol to CTMA–CV aggregates. In addition, the CTMA–CV aggregates have better adsorption capacity towards 2-naphthol than the combination of CTMA aggregates and CV aggregates do. FTIR results showed that CV could adjust the arrangement of CTMA in the CTMA–CV aggregates, which might be the reason for the enhanced adsorption capacity. Results of this work suggest that montmorillonite can be used as a low-cost and high-efficient adsorbent for the simultaneous removal of different types of organic contaminants from water.
    Applied Clay Science 02/2014; s 88–89:33–38. · 2.70 Impact Factor
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    ABSTRACT: By restricting layer collapse, and increasing the exposure of siloxane surfaces, in the interlayer space of organoclays, their capacity for adsorbing hydrophobic organic contaminants has been enhanced. The organoclays were prepared by replacing a proportion (20–80%) of the Li+ ions, occupying interlayer sites in montmorillonite, with tetramethylammonium (TMA) ions. The TMA-exchanged samples were then heated at 200 °C for 12 h to induce migration of most interlayer Li+ ions into the silicate layers, and as a result of which the layer charge was reduced. Finally, the remaining Li+ cations in the reduced-charge montmorillonite were exchanged with TMA. The structural and adsorptive characteristics of the novel reduced-charge organoclays (N-TMA-Mt) are compared with those of their traditional counterparts (T-TMA-Mt), obtained by direct intercalation of TMA into reduced-charge montmorillonites. As layer charge decreased, both the specific surface area and adsorption capacity (for nitrobenzene) of T-TMA-Mt increased to a maximum, and then declined. In the case of N-TMA-Mt, however, both parameters increased as layer charge decreased. When the layer charge of N-TMA-Mt decreased to approximately 60% of the value for the original montmorillonite, the adsorption capacity of the sample was greater than that of T-TMA-Mt. XRD analysis indicates that the layer structure of N-TMA-Mt is more rigid than that of T-TMA-Mt. The above results indicate that the pre-exchanged TMA cations in the interlayer space of N-TMA-Mt act as pillars, restricting layer collapse (during thermal treatment), and increasing the exposure of siloxane surfaces. As a result, the capacity of N-TMA-Mt for adsorbing hydrophobic organic contaminants is superior to that of traditional organoclays.
    Applied Clay Science 02/2014; s 88–89:73–77. · 2.70 Impact Factor
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    ABSTRACT: Clay minerals are ubiquitous in soil and sediments and they have been considered as important geosorbents for organic contaminants. However, the adsorption capacity of clay minerals strongly depends on their hydration status. In this work, the adsorptive characteristics of benzene on a set of hydrated montmorillonites which contain different counterions (Na+, K+, Cs+) and water content were studied using classical molecular dynamics (MD) simulations. On the outer surface of unhydrated montmorillonites the adsorption energy of benzene decreases in the order: Na–montmorillonite (−0.46 eV) > K–montmorillonite (−0.39 eV) > Cs–montmorillonite (−0.36 eV). After hydration benzene molecule will be gradually expelled away from the siloxane surface by water molecules and be adsorbed at the water–vacuum interface. Within the interlayer space of unhydrated montmorillonite benzene molecule can only lay flat on the siloxane surface, and a large positive adsorption energy is obtained due to the energy consumption which is needed to expand the interlayers. Hydration causes the expansion of montmorillonite interlayers, which then can help the adsorption of benzene to the interlayer spaces. As a result, the adsorption energy gradually evolves from large positive to negative as the water content increases to monolayer arrangement, and after that the adsorption energy remains negative. Hydration also significantly influences the interaction between counterions and benzene molecule, and benzene can bind closer to the counterbalance cation with weaker hydration capacity. Compared to the hydrated counterions, the hydrated siloxane surface is more likely to be the adsorption sites for benzene molecule. The above findings indicate that the hydration of montmorillonite has versatile effects on the adsorption of organic contaminants.
    Colloids and Surfaces A Physicochemical and Engineering Aspects 10/2013; 434:200–206. · 2.35 Impact Factor
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    ABSTRACT: Hydroxy-iron-aluminum pillared bentonite (H-Fe-Al-B) was synthesized with ion exchange method, and its catalyst characteristics were analyzed by using X-ray diffraction (XRD) and X-ray photoelectron spectrometry (XPS). The photo-Fenton catalytic activity of H-Fe-Al-B was tested under different reaction condition using azocarmine B (ACB) as model pollutant under ultraviolet light (UV) irradiation. The effects of three operating variables, initial dye concentration, initial pH value and H2O2 concentration on the decolorization efficiency of ACB were optimized by response surface methodology (RSM) based on Box-Behnken design. The results showed that hydroxy aluminum iron ions intercalated into the interlayer spaces of bentonite successfully and H-Fe-Al-B had high photocatalytic activity. Analysis of variance (ANOVA) indicated that the proposed quadratic model could be used to navigate the design space. The proposed model was approximately in accordance with the experimental case with correlation coefficients R2, Radj2 and Rpred2 correlation coefficients of 0.9996, 0.9991 and 0.9934, respectively. The optimum conditions for ACB decolorization were dye concentration of 143.7 mg/L, pH of 4.2 and H2O2 concentration of 17.7 mM, respectively. The predicted decolorization rate under the optimum conditions determined by the proposed model was 99.6%. Confirmatory tests were carried out under the optimum conditions and the decolorization rate of 99.5% was observed, which closely agreed with the predicted value.
    Applied Surface Science 09/2013; · 2.54 Impact Factor
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    ABSTRACT: This study investigates the effect of sodium nitroprussiate (SNP), an exogenous NO-donor, on the joint toxicity of binary mixtures of cetyltrimethylammonium chloride (CTAC) and fluoranthene (Flu) (CTAC/Flu), which are representatives for surfactants and polycyclic aromatic hydrocarbons (PAHs) respectively, in a unicellular green alga Chlorella vulgaris (C. vulgaris). The results showed that the addition of low SNP (20μM) alleviated the CTAC/Flu combined pollution damage in C. vulgaris. Supplement of low SNP significantly increased the algae biomass, chlorophyll content, soluble protein content and the activities of superoxide dismutase (SOD), peroxidase (POD) and catalase (CAT) as compared to CTAC/Flu treatment alone. SNP also reduced the content of malondialdehyde (MDA) and the reactive oxygen species (ROS), as compared with CTAC/Flu treated alone. On the contrary, the above phenomena were reversed when high concentration of SNP (100μM) was added. Our study indicated that the damage of the joint action of surfactants and PAHs on hydrobios can be alleviated through protecting against oxidant substances and increasing the activity of antioxidant enzymes with an exogenous supply of NO in certain concentration range.
    Chemosphere 08/2013; · 3.14 Impact Factor
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    ABSTRACT: To achieve better removal of NH4(+) and TP in wastewater, a new algae-bacteria combined system of Chlorella vulgaris and Bacillus licheniformis was investigated in a 6-d experiment. The results showed that 78% of NH4(+) could be removed in the combined system, while 29% in single algae system and only 1% in single bacteria system. Approximately 92% of TP was removed in the combined system, compared with 55% and 78% in single algae and bacteria system, respectively. B. licheniformis was proven to be a growth-promoting bacterium for C. vulgaris by comparing Chl a concentrations in the single and combined systems. In the removal process, pH of the combined system was observed to reduce significantly from 7.0 to 3.5. Whereas with pH regulated to 7.0, higher removal efficiencies of NH4(+) (86%) and TP (93%) were achieved along with the recovery of algal cells and the increase of Chl a. These results suggest that nutrients in wastewater can be removed efficiently by the algae-bacteria combined system and pH control is crucial in the process.
    Chemosphere 06/2013; · 3.14 Impact Factor
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    ABSTRACT: The removal of nutrients by algae is regarded as a vital process in wastewater treatment, however algal cell activity can be inhibited by some toxic chemicals during the biological process. This study investigated the uptake of ammonia nitrogen (NH4(+)) and total phosphorus (TP) by a green alga (Chlorella vulgaris) and algal cell responses under the stress of cetyltrimethyl ammonium bromide (CTAB), a representative for quaternary ammonium compounds (QACs, cationic surfactants). When the concentration of CTAB increased from 0 to 0.6mg/L, the uptake efficiencies of NH4(+) and TP decreased from 88% to 18% and from 96% to 15%, respectively. Algal cell responses showed a decline in photosynthesis activity as indicated by the increase of chlorophyll autofluorescence from 2.9a.u. to 25.3a.u.; and a decrease of cell viability from 88% to 51%; and also a drop in esterase activity as indicated by the decrease in fluorescence of fluorescein diacetate stained cells from 71.5a.u. to 4.7a.u. Additionally, a transcription and translation response was confirmed by an enhancement of PO peak and amide II peak in algal cellular macromolecular composition stimulated by CTAB. The results suggest that QACs in wastewater may inhibit nutrient uptake by algae significantly through declining algal cell activities.
    Aquatic toxicology (Amsterdam, Netherlands) 04/2013; 138-139C:81-87. · 3.12 Impact Factor
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    ABSTRACT: The antimicrobial activity of the essential oil from the peel of Ponkan (Citrus reticulate Blanco) was assayed against 6 microorganisms commonly associated with food spoilage and food safety such as Escherichia coli ATCC 25922, Staphylococcus aureus ATCC 25923, Bacillus subtilis ATCC 21616, Penicillium chrysogenum ATCC 10106, Aspergillus niger ATCC 16888 and Saccharomyces cerevisiae. Results by disc diffusion method and minimum inhibitory concentration (MIC) determination method showed that the essential oil had promising antimicrobial activity against all the microorganisms tested. The highest mean zone of inhibition and lowest values of MIC were recorded against S. cerevisiae followed by P. chrysogenum ATCC 10106 and E. coli ATCC 25922. The results of the present study suggested that the essential oil of Pokan would be a natural alternative for chemicals in food preservation.
    Journal of essential oil-bearing plants JEOP 03/2013; 13(2):230-236. · 0.19 Impact Factor
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    ABSTRACT: This study explored the possible mechanism of the joint toxicity of binary mixtures of cetyltrimethylammonium chloride (CTAC) and fluoranthene (Flu) to the green alga Chlorella vulgaris by examining the subcellular distribution of Flu within the alga. The joint action of CTAC (100μgL(-1)) and Flu (0-200μgL(-1)) on the algae changed from a synergetic effect (0-50μgL(-1)) to an antagonistic effect (50-200μgL(-1)) with an increase of the Flu concentration. The Flu uptake was enhanced by the presence of CTAC through the intracellular detection of Flu. Furthermore, the highest amount of Flu bound to the cytosol, whereas the least amount bound to the cellular debris when synergistic effect was observed at 2.5μgL(-1) Flu. However, the highest amount of Flu bound to the cellular debris, whereas the least amount bound to the organelles when antagonistic effect was displayed at 200μgL(-1) Flu. The different subcellular distribution of Flu may affect the uptake of the highly toxic CTAC by the algae in the binary mixture, and consequently lead to a different level of CTAC toxicity. The abovementioned results indicate that the subcellular distribution of chemicals can be used to elucidate possible mechanisms for the joint toxicity of their binary mixtures to aquatic organisms.
    Chemosphere 07/2012; · 3.14 Impact Factor
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    ABSTRACT: Linear free energy relationships (LFERs) were applied to investigate the sorptive characteristics of organic contaminants (OCs) on organoclays from water. Three cetyltrimethylammonium modified montmorillonites (C-Mts) were selected as representative organoclays. The sorption coefficients (logK(oc)) of OCs on the C-Mts were calculated according to the results of batch sorption experiments. Then the LFER equations for OC sorption on C-Mts from water were developed. The results of this study showed that compared with bulk water, water saturated C-Mts are more polarizable, less polar and cohesive, and have stronger H-bond acceptor capacities and weaker H-bond donor capacities. The primary driving forces for the sorption of OCs from water to C-Mts can be ascribed to the weaker cohesive characteristics of C-Mts as well as the stronger nonspecific Van der Waals interaction between OCs and C-Mts. With increasing CTMA loading amount, the interaction between OCs and C-Mts increases whereas the C-Mts become more cohesive. Consequently, the sorption capacity of C-Mts first increases with CTMA loading amount and then decreases with further increased loading amount.
    Journal of hazardous materials 07/2012; 233-234:228-34. · 4.33 Impact Factor
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    ABSTRACT: In this work, molecular dynamics simulation was applied to investigate the adsorption of Tetrachlorodibenzo-p-Dioxin (TCDD) on tetramethylammonium (TMA) and tetrapropylammonium (TPA) modified montmorillonite, with the aim of providing novel information for understanding the adsorptive characteristics of organo-montmorillonite toward organic contaminants. The simulation results showed that on both outer surface and interlayer space of TPA modified montmorillonite (TPA-mont), TCDD was adsorbed between the TPA cations with the molecular edge facing siloxane surface. Similar result was observed for the adsorption on the outer surface of TMA modified montmorillonite (TMA-mont). These results indicated that TCDD had stronger interaction with organic cation than with siloxane surface. While in the interlayer space of TMA-mont, TCDD showed a coplanar orientation with the siloxane surfaces, which could be ascribed to the limited gallery height within TMA-mont interlayer. Comparing with TMA-mont, TPA-mont had larger adsorption energy toward TCDD but smaller interlayer space to accommodate TCDD. Our results indicated that molecular dynamics simulation can be a powerful tool in characterizing the adsorptive characteristics of organoclays and provided additional proof that for the organo-montmorillonite synthesized with small organic cations, the available interlayer space rather than the attractive force plays the dominant role for their adsorption capacity toward HOCs.
    Journal of Colloid and Interface Science 03/2012; 377(1):328-33. · 3.55 Impact Factor
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    ABSTRACT: The amount of active capture antibodies immobilized per unit square is crucial to developing effective antibody chips, biosensors, immunoassays and other molecular recognition technologies. In this study, we present a novel yet simple method for oriented antibody immobilization at high density based on the formation of an orderly, organized aggregation of immunoglobulin G (IgG) and staphylococcal protein A (SPA). Following the chelation of His-tag with Ni(2+), antibodies were immobilized on a solid surface in a three-dimensional (3D) manner and exposed the analyte receptor sites well, which resulted in a substantial enhancement of the analytical signal with more than 64-fold increase in detection sensitivity. Pull-down assays confirmed that IgG antibody can only bind to Ni(2+) matrix indirectly via a SPA linkage, where the His-tag is responsible for binding Ni(2+) and homologous domains are responsible for binding IgG Fc. The immobilization approach proposed here may be an attractive strategy for the construction of high performance antibody arrays and biosensors as long as the antibody probe is of mammalian IgG.
    Biosensors & Bioelectronics 07/2011; 28(1):91-6. · 6.45 Impact Factor
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    ABSTRACT: Understanding microstructure of organo montmorillonites (OMts) under wet condition is of high importance in clarifying their adsorption characteristics towards hydrophobic organic compounds in water. In this work, we investigated the basal spacing evolution of a series of OMt with various cetyltrimethylammonium (CTMA) loading during the intercalation, aging, drying and rehydration processes. The aim of this work is to provide novel information for exploring microstructure of wet OMt. X-ray diffraction results show that basal spacing value of the OMt does not change evidently after 30min during the CTMA intercalation process, and then it decreases slightly in the following aging process. Drying causes dehydration and further decrease of basal spacing value. Rehydration of the dried OMt will cause the swelling of basal spacing again, but only the samples with relatively low CTMA loading amounts can recover the large values as those before drying. At relatively high CTMA loading level, OMt always show two (001) diffraction reflections, which indicates a heterogeneous interlayer structure for these samples. Moreover, this heterogeneous interlayer structure seems to be more evident in water. Our results also show that with increasing CTMA loading amounts, the rehydrated OMt show stepwise increase of basal spacing values, i.e., from 1.90nm to 2.70nm, and then to 2.76nm. Finally, the possible interlayer structures of the rehydrated OMt are proposed.
    Colloids and Surfaces A Physicochemical and Engineering Aspects 07/2011; 384(1):401-407. · 2.35 Impact Factor
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    ABSTRACT: Linear free energy relationships (LFER) combined with molecular dynamics (MD) simulations were used to investigate the sorptive characteristics of organic compounds (OCs) on cetyltrimethylammonium (CTMA) intercalated montmorillonite (CTMA-Mont). The LFER for OCs sorption on CTMA-Mont, log K(oc) = (1.45 ± 0.20)E - (0.37 ± 0.15)S + (0.56 ± 0.15)A - (1.75 ± 0.25)B + (2.50 ± 0.45)V + (0.19 ± 0.35), was obtained by a multiple linear regression of the sorption coefficients of the OCs against their solvation descriptors. In comparison to water, CTMA-Mont is more polarizable, less polar and cohesive, and has stronger H-bond acceptor and weaker H-bond donor capacities. Using the above equation we calculated that vV and eE were the dominant solvation terms contributing to the sorption for all the OCs. MD simulations provided atomic-level insight into the interlayer structure of CTMA-Mont. Phenol molecules were shown to be sorbed into the nanosized aggregates formed by CTMA alkyl chains. The hydrophobic environment within the aggregates is responsible for the sorbent's more polarizable, less polar and cohesive characteristics. CTMA-Mont has strong H-bond acceptor and weak H-bond donor capacities as oxygen atoms on the siloxane surface act as H-bond acceptors for both water and OC molecules. With the combination of the results of the two methods, we can provide new insights for understanding the sorptive characteristics of organomontmorillonite.
    Environmental Science & Technology 07/2011; 45(15):6504-10. · 5.48 Impact Factor
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    ABSTRACT: The major objective of the present study was to investigate the role of iron and manganese on the formation of haloacetic acids (HAAs) when algae are chlorinated at different pHs. The results showed that both iron and manganese can reduce the yields of dichloroacetic acid (DCAA) and trichloroacetic acid (TCAA) on chlorinating green alga Chlorella vulgaris (C. vulgaris) at a pH range of 6.0-9.0, and the decline of DCAA and TCAA was shown to be more significant at the low pH range. At pH 6.0, DCAA and TCAA yields decreased by 44.5% and 57.3%, respectively with the addition of 0.5 mg L(-1) iron, and decreased 39.5% and 49.4%, respectively with the addition of 0.5 mg L(-1) manganese. The main reason for decreasing the yields of HAAs as shown by scanning electron microscope (SEM) is that Fe(OH)(3(am)) or MnO(2(am)) coat the algal cells, which then improves their agglomeration of algal cells which is also revealed by the laser particle size analysis (LPSA).
    Journal of hazardous materials 03/2011; 189(1-2):540-5. · 4.33 Impact Factor

Publication Stats

224 Citations
126.31 Total Impact Points


  • 2008–2014
    • Xiangtan University
      • Department of Environmental Science and Engineering
      Siangtan, Hunan, China
  • 2009–2010
    • Northeast Institute of Geography and Agroecology
      • Institute of High Energy Physics
      Peping, Beijing, China
  • 2006–2008
    • Zhejiang University
      • Department of Environmental Science
      Hangzhou, Zhejiang Sheng, China