Lu Liang’s research while affiliated with Hohai University and other places

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Publications (5)


Biomass variation and growth rate of free (a, c) and immobilized (b, d) C. vulgaris in the control and CBZ exposure groups
Total chlorophyll variation in free (a) and immobilized (b) C. vulgaris exposed to varying concentrations of CBZ
Effect of varying concentrations of CBZ on the maximum quantum yield of PSII photochemistry (FV/FM) in free (a) and immobilized (b) C. vulgaris
Variation in MDA and SOD in free (a) and immobilized (b) C. vulgaris exposed to varying concentrations of CBZ
Total removal rate (%) of CBZ by a free and b immobilized C. vulgaris

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Enhancement of the immobilization on microalgae protective effects and carbamazepine removal by Chlorella vulgaris
  • Article
  • Publisher preview available

June 2022

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32 Reads

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12 Citations

Environmental Science and Pollution Research

Lu Liang

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Xue Bai

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Carbamazepine (CBZ) has drawn extensive attention due to their environmental threats. In this study, polyvinyl alcohol-sodium alginate polymers to immobilize Chlorella vulgaris (FACHB-8) were used to investigate whether immobilization can facilitate microalgae to alleviate the CBZ stress and enhance CBZ removal. The results showed that after immobilized treatment, the biomass of microalgae increased by approximately 20%, the maximum level of malondialdehyde content decreased from 28 to 13 μmol/g, and the photosynthetic capacity of FV/FM recovered to 90% of the control group. The CBZ removal rate increased from 67 to 84% by immobilization at a CBZ concentration of 80 mg·L⁻¹. The results indicated that immobilization technology can effectively protect microalgae from CBZ toxicity and improve the removal of CBZ, especially at high concentrations (> 50 mg/L). Biodegradation was the dominant pathway for microalgae to remove carbamazepine. This study added the understanding of the microalgae responses under immobilization and the interactions between immobilized microalgae and CBZ removal, thereby providing a novel insight into microalgae technology in high concentration wastewater treatments. Graphical abstract

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Toxicological responses of Fe 3 O 4 nanoparticles on Eichhornia crassipes and associated plant transportation

June 2019

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36 Reads

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39 Citations

The Science of The Total Environment

Yuanyuan Ding

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[...]

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Lu Liang

This work investigated the interaction of Fe 3 O 4 nanoparticles (NPs) with a floating water plant (Eichhornia crassipes). The effects of Fe 3 O 4 NPs on E. crassipes physiology and root morphology as well as the migration and transformation of Fe 3 O 4 NPs in plant were studied emphatically. Fe 3 O 4 NPs (200 mg/L) showed significant growth inhibition on E. crassipes roots and leaves after a 21-day exposure, while dissolved Fe ³⁺ ions and Fe 3 O 4 bulk particles had no obvious effect on E. crassipes growth. Scanning electron microscopy showed that the roots of E. crassipes were significantly damaged, the root tips became thin and the root epidermis began to peel off after Fe 3 O 4 NPs exposure. In addition, there was disordered cell arrangement and a destroyed elongation zone of the root tips. The physiology of E. crassipes was also affected. In particular, after exposure to Fe 3 O 4 NPs (200 mg/L), a distinct decrease in chlorophyll content and catalase activity and an increase of malondialdehyde (MDA) content could be seen. Transmission electron microscopy and energy dispersive spectroscopy revealed that Fe 3 O 4 NPs were present in the root epidermis, intercellular space and protoplasts, as well as in the leaf cytoplasm and chloroplasts. Vulcanization in the leaves was also found through diffraction analysis, which may be due to the small number of absorbed nanoparticles, some of which still existed in the original form in the leaves while others were reduced to FeS through interactions with plant components during translocation. These findings are helpful for better understanding the fate of NPs in aquatic plants. Moreover, it is important to evaluate the water environment safety of NPs.


Highly selective colorimetric sensing of Cu2+ using Schiff base derivative immobilized on polyvinyl alcohol microspheres

May 2018

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530 Reads

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6 Citations

New Journal of Chemistry

In this study, a naked-eye colorimetric sensor was fabricated based on the Schiff base molecule (-SH) derivative immobilized onto polyvinyl alcohol (PVA) microspheres. The surface morphology of PVA-SH was characterized by scanning electron microscopy, Fourier transform infrared spectroscopy, and X-ray photoelectron spectroscopy. PVA-SH microspheres could selectively detect Cu2+ by visible color change. This novel chemosensor demonstrated high sensitivity and selectivity for the detection of Cu2+, which can induce a color change of PVA-SH from white to yellow. PVA-SH exhibited a detection limit of 0.086 μM for Cu2+. Moreover, the simple and cost-efficient chemosensor was used for detecting Cu2+ in actual environmental water samples.


Biosorption of nitroimidazole antibiotics onto chemically modified porous biochar prepared by experimental design: Kinetics, thermodynamics, and equilibrium analysis

October 2016

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54 Reads

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65 Citations

Process Safety and Environmental Protection

This investigation emphasized the optimum preparation conditions for the chemical modification of eucalyptus sawdust biochar as a potential biosorbent to promote the removal of nitroimidazoles from aqueous solutions. By ANOVA for central composite design of response surface methodology, we found the activation temperature and impregnation ratio of 85% H3PO4 to sawdust as the significant factors for maximizing the adsorption capacity of metronidazole. Optimum activation temperature, impregnation ratio, and activation time were 500 °C, 0.62, and 90 min, respectively. The Brunauer–Emmett–Teller surface area and total pore volume increased from 32.80 m² g⁻¹ to 882.04 m² g⁻¹ and 0.01829 cm³ g⁻¹ to 0.4316 cm³ g⁻¹ after H3PO4 activation, respectively. The removal efficiencies using biochar prepared at optimum conditions were 97.1% and 96.4% for metronidazole and dimetridazole at 20 mg L⁻¹ concentration and 1.0 g L⁻¹ biochar dosage within 2 h. The adsorption process was described well by pseudo-second-order model, and solute transfer was controlled by both boundary-layer and intraparticle diffusion. Thermodynamic study revealed that the adsorption process was spontaneous and exothermic. The Freundlich model presented better a fit for the adsorption equilibrium. The maximum adsorption capacities for metronidazole and dimetridazole were 167.5 and 200 mg g⁻¹, respectively.


Aggregation of TiO2-graphene nanocomposites in aqueous environment: Influence of environmental factors and UV irradiation

September 2015

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65 Reads

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46 Citations

The Science of The Total Environment

The aggregation kinetics of TiO2-graphene nanocomposites in aqueous solution affected by solution pH, salt types (NaCl, CaCl2) and concentrations of electrolytes, and stability induced by UV irradiation was investigated in this study. The zeta potentials and hydrodynamic diameter of the nanoparticles were used as bases to assess the aggregation behavior, and stability of nanocomposites exposed to UV irradiation was expressed in terms of supernatant concentration. The aggregation of TiO2-graphene nanoparticles in aqueous media followed the colloidal theory. TiO2-graphene nanoparticles were significantly aggregated in the presence of a diavalent cation compared with monovalent cation because the former was more capable of effective charge screening and neutralization. The calculated Hamaker constant of the TiO2-graphene nanocomposites in aqueous solution prepared in the lab was 2.31×10(-20)J. The stability of this composite nanoparticles was between those of pure TiO2 and graphene. A known intensity of UV irradiation was beneficial in the formation of TiO2-graphene nanoparticle aggregates. However, prolonged UV irradiation may stabilize the nanoparticles. These results provided critical information about the colloidal properties of the new TiO2-graphene nanocomposites and were useful in predicting the fate and transport of TiO2-graphene nanocomposites in natural water environments.

Citations (5)


... This is visually manifested by a heterogeneous cell distribution within the gel matrix (Huang et al., 2000;Lebeau et al., 2000). Liang et al. (2022) studied the toxicity and removal of carbamazepine using immobilized Chlorella vulgaris in a polyvinyl alcohol-sodium alginate matrix. Dębowski et al. (2021) investigated an innovative trickle bed reactor with immobilized microalgae for capturing CO 2 from flue and exhaust gasses. ...

Reference:

From lab to outdoors: Microalgal process perspective for a step to reality
Enhancement of the immobilization on microalgae protective effects and carbamazepine removal by Chlorella vulgaris

Environmental Science and Pollution Research

... Long-term interactions greatly increase the risk of ASs invading tissue structures, causing damage at the cellular level and affecting overall or localized material transport (Ramsperger et al. 2020). For instance, Fe 3 O 4 nanoparticles directly invade the cell interstitium, cytoplasm, and cell wall of E. crassipes after up to 21 days of exposure (Ding et al. 2019). Furthermore, long-term exposure contributes to the formation of ecological and biological coronae for ASs with surfaces that readily interact interfacially with surrounding materials, such as MPs. ...

Toxicological responses of Fe 3 O 4 nanoparticles on Eichhornia crassipes and associated plant transportation
  • Citing Article
  • June 2019

The Science of The Total Environment

... The O1s core-level spectrum of ZZZ NCs exhibits two predominant peaks centered at 529.9 and 531.6 eV, which represent the O 2− ions in the Zn-O bonds and the chemisorbed oxygen species respectively (Gandla et al., 2015). Furthermore, C1s peaks were observed in the survey spectra owing to the presence of PVA in the NCs, the spectrum exhibited three prominent peaks centered at 283.4, 284.7, and 287.9 eV, representing the C-C, C-H, and C--O, respectively (Bai et al., 2018). Thus, the XPS results prove the co-existence of the elements as ZZZ NCs. ...

Highly selective colorimetric sensing of Cu2+ using Schiff base derivative immobilized on polyvinyl alcohol microspheres
  • Citing Article
  • May 2018

New Journal of Chemistry

... To examine the adsorption kinetics, the adsorption process was simplified by a pseudo-first-order kinetic model (PFOM) and PSOM [32]. The intra-particle diffusion model can be used to identify the diffusion mechanism [33].In addition, the experimental data were fitted with three adsorption isotherm models, Langmuir, Freundlich, and Dubinin-Radushkevich (D-R) [34,35]. The adsorption experiments were then performed at different temperatures and the corresponding adsorption thermodynamic parameters, including Gibbs free energy (ΔG • ), enthalpy (ΔH • ), and entropy (ΔS • ), were calculated [36]. ...

Biosorption of nitroimidazole antibiotics onto chemically modified porous biochar prepared by experimental design: Kinetics, thermodynamics, and equilibrium analysis
  • Citing Article
  • October 2016

Process Safety and Environmental Protection

... Our study used 'virgin' PS-MP which were not subjected to further physicochemical alterations whereas weathering of MP was shown to influence surface groups and functionality, structural properties and therefore likely effects the coagulation behavior (Brandon et al., 2016;Dong et al., 2020;Hua et al., 2016;Jahnke et al., 2017). Further, it was observed that biofilm formation on MP can promote coagulation and change sedimentation behavior (Chen et al., 2019;Kaiser et al., 2017;Summers et al., 2018) and become more hydrophilic through the coverage of biofilms (van Melkebeke et al., 2020). ...

Aggregation of TiO2-graphene nanocomposites in aqueous environment: Influence of environmental factors and UV irradiation
  • Citing Article
  • September 2015

The Science of The Total Environment