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Polycyclic aromatic hydrocarbons (PAHs) are ubiquitous environmental pollutants in sediments and pose a serious risk for freshwater ecosystems. In this study, sediment samples from 24 sites were collected from the cyanobacterial bloom-occurring, macrophyte-growing lake bay and adjoining river of Taihu Lake. Here, the concentration levels, sources, and risk assessment of 16 priority PAHs in the surface sediments from typical algae, macrophyte lake bay and adjoining river of Taihu Lake, were investigated, and the results were compared with those of previous studies. The total PAH (ΣPAH) concentrations ranged from 4900 to 16,800 ng·g−1 in sediments of the Taihu Lake bay and from 5736.2 to 69,362.8 ng·g−1 in sediments of the adjoining river. The level of PAHs in riverine sediments was significantly higher than those of the Taihu Lake bay, and that of the Dongshan River was significantly higher than that of the Mashan River, while there was no significant difference in the concentrations of PAHs between the cyanobacterial bloom-occurring and macrophyte-growing lake zone. The results indicated petroleum contamination was dominated in the cyanobacterial bloom-occurring, macrophyte-growing lake bay, while PAHs of the riverine sediments derived from petroleum contamination and the combined combustion including wood, coal combustion, and petroleum combustion according to the identification by the molecular diagnostic ratio and principal component analysis (PCA). Sediment risk assessment based on sediment quality guidelines (SQGs) suggested that partial regions of the Taihu Lake bay were subjected to the potential ecological risk of the 3-ring and 5-ring PAHs, and there existed negative effects related to naphthalene pollutant in all survey regions. The adjoining riverine sediments showed a high ecological risk.
Yibo Dong; Zaisheng Yan; Huifang Wu; Guoqing Zhang; Haichen Zhang; Mingzhong Yang. Polycyclic Aromatic Hydrocarbons in Sediments from Typical Algae, Macrophyte Lake Bay and Adjoining River of Taihu Lake, China: Distribution, Sources, and Risk Assessment. Water 2021, 13, 470 .
AMA StyleYibo Dong, Zaisheng Yan, Huifang Wu, Guoqing Zhang, Haichen Zhang, Mingzhong Yang. Polycyclic Aromatic Hydrocarbons in Sediments from Typical Algae, Macrophyte Lake Bay and Adjoining River of Taihu Lake, China: Distribution, Sources, and Risk Assessment. Water. 2021; 13 (4):470.
Chicago/Turabian StyleYibo Dong; Zaisheng Yan; Huifang Wu; Guoqing Zhang; Haichen Zhang; Mingzhong Yang. 2021. "Polycyclic Aromatic Hydrocarbons in Sediments from Typical Algae, Macrophyte Lake Bay and Adjoining River of Taihu Lake, China: Distribution, Sources, and Risk Assessment." Water 13, no. 4: 470.
Magnetic activated carbon and magnetic biochar have been widely used for contaminants removal due to the advantages of sequestration and recovery. However, the remediation function and microbial response of conductive magnetic carbonaceous materials for treating organic contaminated sediment are poorly understood. In this study we applied novel three-dimensional mesh magnetic loofah sponge biochar (MagLsBC), made from natural agricultural product, to remediate polycyclic aromatic hydrocarbons (PAHs)-contaminated sediment. Compared to other carbon-based materials, MagLsBC achieved the high reduction of PAHs content and bioavailability in sediment by respectively 31.9% and 38.1% after 350 days. Microbial analysis showed that MagLsBC amended sediment had different community diversity, structure and enriched dominant species associated with the aromatic hydrocarbon metabolism. And MagLsBC amendment significantly increased the aromatic compounds degradation function, which was not observed in other treatments, and methanogenesis function. Further analysis revealed that the enhanced microbial responses in MagLsBC amended sediment were related with the high conductivity of MagLsBC. These results give the new insights into the effect of magnetic carbon materials on microbial community and organic pollutants degradation function during the long period amendment, demonstrating MagLsBC as an effective material with the biostimulation potential for the risk control of PAHs contamination.
Zheng Hao; Qianhong Wang; Zaisheng Yan; Helong Jiang. Novel magnetic loofah sponge biochar enhancing microbial responses for the remediation of polycyclic aromatic hydrocarbons-contaminated sediment. Journal of Hazardous Materials 2020, 401, 123859 .
AMA StyleZheng Hao, Qianhong Wang, Zaisheng Yan, Helong Jiang. Novel magnetic loofah sponge biochar enhancing microbial responses for the remediation of polycyclic aromatic hydrocarbons-contaminated sediment. Journal of Hazardous Materials. 2020; 401 ():123859.
Chicago/Turabian StyleZheng Hao; Qianhong Wang; Zaisheng Yan; Helong Jiang. 2020. "Novel magnetic loofah sponge biochar enhancing microbial responses for the remediation of polycyclic aromatic hydrocarbons-contaminated sediment." Journal of Hazardous Materials 401, no. : 123859.
Lake and adjoining river ecosystems are ecologically and economically valuable and are heavily threatened by anthropogenic activities. Determining the inherent capacity of ecosystems for polycyclic aromatic hydrocarbon (PAH) biodegradation can help quantify environmental impacts on the functioning of ecosystems, especially on that of the microbial community. Here, PAH biodegradation potential was compared between sediments collected from a lake bay (LS) and an adjoining river (RS) ecosystem. Microbial community composition, function, and their co‐occurrence patterns were also explored. In the RS, the biodegradation rates (K D) of pyrene or PAH were almost two orders of magnitude higher than those in the LS. Sediment functional community structure and network interactions were dramatically different between the LS and RS. Although PAH degradation genes (p450aro , quinoline , and qorl ) were detected in the LS, the community activity of these genes needed to be biostimulated for accelerated bioremediation. In contrast, functional communities in the RS were capable of spontaneous natural attenuation of PAH. The degradation of PAH in the RS also required coordinated response of the complex functional community. Taken together, elucidating functions and network interactions in sediment microbial communities and their responses to environmental changes is very important for the bioremediation of anthropogenic toxic contaminants. This article is protected by copyright. All rights reserved.
Zaisheng Yan; Na Song; Changhui Wang; Helong Jiang. Functional potential and assembly of microbes from sediments in a lake bay and adjoining river ecosystem for polycyclic aromatic hydrocarbon biodegradation. Environmental Microbiology 2020, 23, 628 -640.
AMA StyleZaisheng Yan, Na Song, Changhui Wang, Helong Jiang. Functional potential and assembly of microbes from sediments in a lake bay and adjoining river ecosystem for polycyclic aromatic hydrocarbon biodegradation. Environmental Microbiology. 2020; 23 (2):628-640.
Chicago/Turabian StyleZaisheng Yan; Na Song; Changhui Wang; Helong Jiang. 2020. "Functional potential and assembly of microbes from sediments in a lake bay and adjoining river ecosystem for polycyclic aromatic hydrocarbon biodegradation." Environmental Microbiology 23, no. 2: 628-640.
The loading of La can substantially enhance the adsorption capability of drinking water treatment residue (DWTR) for better recycling. Normally, the modification was based on incubation of DWTR and La solution at a certain ratio, following by solid-liquid separation and drying processes. This study attempted to simplify La loading procedures by adopting high ratio of DWTR and La solution to eliminate the solid-liquid separation, aiming to promote the potential actual production. According to the results of the short- (2 d) and long-term (30 d) P adsorption tests, the N2 gas sorption and desorption analysis, the X-ray photoelectron spectroscopy analysis, and the metal fractionation, the substantial enhanced adsorption capability of the modified DWTR was maintained and the La loading mechanisms to DWTR changed little after eliminating solid-liquid separation processes during modification; typically, La loading increased the initial P adsorption rates from 1.00 (raw DWTR) to 6.08 and 6.03 mg g−1 d−1 for the modified DWTR with and without the separation processes. Furthermore, the DWTR before and after modification had little unfavorable effect on the survival of snail Bellamya aeruginosa, while eliminating the separation processes tended to reduce the bioavailability of Al, Fe, and La in the modified DWTR. These results demonstrated that solid-liquid separation was not the key step for DWTR modification and that the developed simple modification method was feasible for La loading to DWTR, promoting the beneficial recycling in environmental remediation.
Changhui Wang; Zheng Hao; Zhao Wei; Leilei Bai; Zongbao Yao; Huacheng Xu; He-Long Jiang; Zaisheng Yan; Yuanyuan Zhao. A simple method to improve the adsorption properties of drinking water treatment residue by lanthanum modification. Chemosphere 2019, 221, 750 -757.
AMA StyleChanghui Wang, Zheng Hao, Zhao Wei, Leilei Bai, Zongbao Yao, Huacheng Xu, He-Long Jiang, Zaisheng Yan, Yuanyuan Zhao. A simple method to improve the adsorption properties of drinking water treatment residue by lanthanum modification. Chemosphere. 2019; 221 ():750-757.
Chicago/Turabian StyleChanghui Wang; Zheng Hao; Zhao Wei; Leilei Bai; Zongbao Yao; Huacheng Xu; He-Long Jiang; Zaisheng Yan; Yuanyuan Zhao. 2019. "A simple method to improve the adsorption properties of drinking water treatment residue by lanthanum modification." Chemosphere 221, no. : 750-757.
The separation and recovery of pollutant-loaded magnetic carbon materials from organic contaminated environment is recently concerned, but the change of sorption ability and mechanism of activated carbon and biochar caused by magnetic particles modification still need to be explored. Here, the magnetic modification of two coconut shell-, coal-derived activated carbon and one biochar, and its effect on the removal of phenol from water were investigated. Magnetic activated carbon (MAC) and magnetic biochar (MBC) were prepared by co-precipitation. The increase of mass magnetic susceptibilities and energy dispersive X-ray spectroscopy (EDX) analysis showed that magnetic particles were successfully coated on the surface of virgin carbonaceous materials (VCMs). Magnetic modification enhanced the surface area and pore volume of activated carbon, and preserved those structure properties of biochar. Magnetic activated carbon had lower adsorption rates (10.641 g mg−1·min−1) than virgin activated carbon (20.575 g mg−1·min−1) while magnetic biochar exhibited higher adsorption rate (0.618 g mg−1·min−1) compared with virgin biochar (0.040 g mg−1·min−1), which were related to mass transport process. Data from Langmuir model results suggested that maximum adsorption capacities of three carbon adsorbents were increased by magnetic modification. The enhanced removal of phenol after magnetizing process may attribute to the increase of specific surface area and pore volume. Among VCMs/MCCs, magnetic coconut shell-derived carbon material with 951.84 m2/g surface area exhibited the most organic contaminant sorption performance. This finding gives insight into the adsorption mechanism of magnetic AC/BC for phenol, and provides a guidance to choose the appropriate magnetic composites to remove the organic contaminant effectively.
Zheng Hao; Changhui Wang; Zaisheng Yan; He-Long Jiang; Huacheng Xu. Magnetic particles modification of coconut shell-derived activated carbon and biochar for effective removal of phenol from water. Chemosphere 2018, 211, 962 -969.
AMA StyleZheng Hao, Changhui Wang, Zaisheng Yan, He-Long Jiang, Huacheng Xu. Magnetic particles modification of coconut shell-derived activated carbon and biochar for effective removal of phenol from water. Chemosphere. 2018; 211 ():962-969.
Chicago/Turabian StyleZheng Hao; Changhui Wang; Zaisheng Yan; He-Long Jiang; Huacheng Xu. 2018. "Magnetic particles modification of coconut shell-derived activated carbon and biochar for effective removal of phenol from water." Chemosphere 211, no. : 962-969.
A pyrene-degrading strainHydrogenophagasp. PYR1 was isolated from PAH-contaminated river sediments and found to be able to degrade high molecular weight-polycyclic aromatic hydrocarbons under both aerobic and anaerobic conditions.
Zaisheng Yan; Yu Zhang; Huifang Wu; Mingzhong Yang; Haichen Zhang; Zheng Hao; Helong Jiang. Isolation and characterization of a bacterial strain Hydrogenophaga sp. PYR1 for anaerobic pyrene and benzo[a]pyrene biodegradation. RSC Advances 2017, 7, 46690 -46698.
AMA StyleZaisheng Yan, Yu Zhang, Huifang Wu, Mingzhong Yang, Haichen Zhang, Zheng Hao, Helong Jiang. Isolation and characterization of a bacterial strain Hydrogenophaga sp. PYR1 for anaerobic pyrene and benzo[a]pyrene biodegradation. RSC Advances. 2017; 7 (74):46690-46698.
Chicago/Turabian StyleZaisheng Yan; Yu Zhang; Huifang Wu; Mingzhong Yang; Haichen Zhang; Zheng Hao; Helong Jiang. 2017. "Isolation and characterization of a bacterial strain Hydrogenophaga sp. PYR1 for anaerobic pyrene and benzo[a]pyrene biodegradation." RSC Advances 7, no. 74: 46690-46698.
Sediment microbial fuel cells (SMFCs) can stimulate the degradation of polycyclic aromatic hydrocarbons in sediments, but the mechanism of this process is poorly understood at the microbial functional gene level. Here, the use of SMFC resulted in 92% benzo[a]pyrene (BaP) removal over 970 days relative to 54% in the controls. Sediment functions, microbial community structure, and network interactions were dramatically altered by the SMFC employment. Functional gene analysis showed that c-type cytochrome genes for electron transfer, aromatic degradation genes, and extracellular ligninolytic enzymes involved in lignin degradation were significantly enriched in bulk sediments during SMFC operation. Correspondingly, chemical analysis of the system showed that these genetic changes resulted in increases in the levels of easily oxidizable organic carbon and humic acids which may have resulted in increased BaP bioavailability and increased degradation rates. Tracking microbial functional genes and corresponding organic matter responses should aid mechanistic understanding of BaP enhanced biodegradation by microbial electrochemistry and development of sustainable bioremediation strategies.
Zaisheng Yan; Yuhong He; Haiyuan Cai; Joy D. Van Nostrand; Zhili He; Jizhong Zhou; Lee R. Krumholz; He-Long Jiang. Interconnection of Key Microbial Functional Genes for Enhanced Benzo[a]pyrene Biodegradation in Sediments by Microbial Electrochemistry. Environmental Science & Technology 2017, 51, 8519 -8529.
AMA StyleZaisheng Yan, Yuhong He, Haiyuan Cai, Joy D. Van Nostrand, Zhili He, Jizhong Zhou, Lee R. Krumholz, He-Long Jiang. Interconnection of Key Microbial Functional Genes for Enhanced Benzo[a]pyrene Biodegradation in Sediments by Microbial Electrochemistry. Environmental Science & Technology. 2017; 51 (15):8519-8529.
Chicago/Turabian StyleZaisheng Yan; Yuhong He; Haiyuan Cai; Joy D. Van Nostrand; Zhili He; Jizhong Zhou; Lee R. Krumholz; He-Long Jiang. 2017. "Interconnection of Key Microbial Functional Genes for Enhanced Benzo[a]pyrene Biodegradation in Sediments by Microbial Electrochemistry." Environmental Science & Technology 51, no. 15: 8519-8529.
The beneficial recycling of drinking water treatment residue (DWTR) for environmental remediation has attracted growing attention, and oxygen-limited heat treatment has a high potential to improve DWTR adsorptive properties for better recycling. In this study, physicochemical property variation induced by oxygen-limited heat treatment was evaluated for six DWTR obtained from different drinking water treatment plants in Australia, China, and Ireland. The results showed that the changes in many properties, typically amorphous Al and Fe contents, mesopores, specific surface area (SSA), and total pore volume (TPV) of DWTR after treatment, showed inconsistent trends. The treatment also led to the varied lability of metals and As in DWTR although the human bioaccessibility and plant bioavailability of most metals decreased. Accordingly, oxygen-limited heat treatment may not be applicable for all DWTR improvement. Based on these findings, pre-screening processes to evaluate adsorptive properties and metal and metalloid lability were determined. Oxygen-limited heat treatment was more applicable to DWTR with neutral and weak alkaline properties (pH 7.0–7.8), low humic acid (HA) content (< 2.09 mg g-1), and high amorphous Fe and HA ratio (> 5.93), as well as with relatively high amorphous Al and HA ratio and high humin content.
Changhui Wang; Nannan Yuan; Leilei Bai; He-Long Jiang; Yuansheng Pei; Zaisheng Yan. Key factors related to drinking water treatment residue selection for adsorptive properties tuning via oxygen-limited heat treatment. Chemical Engineering Journal 2016, 306, 897 -907.
AMA StyleChanghui Wang, Nannan Yuan, Leilei Bai, He-Long Jiang, Yuansheng Pei, Zaisheng Yan. Key factors related to drinking water treatment residue selection for adsorptive properties tuning via oxygen-limited heat treatment. Chemical Engineering Journal. 2016; 306 ():897-907.
Chicago/Turabian StyleChanghui Wang; Nannan Yuan; Leilei Bai; He-Long Jiang; Yuansheng Pei; Zaisheng Yan. 2016. "Key factors related to drinking water treatment residue selection for adsorptive properties tuning via oxygen-limited heat treatment." Chemical Engineering Journal 306, no. : 897-907.
Tian-Ran Ye; Na Song; Mo Chen; Zai-Sheng Yan; He-Long Jiang. No enhancement of cyanobacterial bloom biomass decomposition by sediment microbial fuel cell (SMFC) at different temperatures. Environmental Pollution 2016, 218, 59 -65.
AMA StyleTian-Ran Ye, Na Song, Mo Chen, Zai-Sheng Yan, He-Long Jiang. No enhancement of cyanobacterial bloom biomass decomposition by sediment microbial fuel cell (SMFC) at different temperatures. Environmental Pollution. 2016; 218 ():59-65.
Chicago/Turabian StyleTian-Ran Ye; Na Song; Mo Chen; Zai-Sheng Yan; He-Long Jiang. 2016. "No enhancement of cyanobacterial bloom biomass decomposition by sediment microbial fuel cell (SMFC) at different temperatures." Environmental Pollution 218, no. : 59-65.
The frequent occurrence of cyanobacterial blooms in eutrophic lakes can lead to a high amount of biomass in aquatic systems, and following cell death, this autochthonous organic matter will eventually decompose. In this study, the effect of temperature and sediment on the chemical composition of cyanobacterial biomass residue was investigated by microcosm experiment. The results showed that the lowest cyanobacterial bloom biomass (CBB) removal efficiency was recorded at 32°C regardless of the presence or absence of sediment. Based on total organic carbon, the CBB removal efficiencies were higher than 90% at 20–29°C but less than 87.0% at 32°C. Pyrolysis gas chromatography mass spectrometry and Fourier transform infrared analysis indicated that organic nitrogen compounds (e.g., carbamic acid monoammonium salt) and polysaccharides (e.g., 2‐propanone, 1‐hydroxy‐) were the main components in the residues. Based on the determined components in the residues under different conditions, unweighted pair group clustering method with arithmetic averages and principal components analysis further suggested that sediment and temperature had obvious influence on the chemical composition of CBB decomposition residues. Considering that cyanobacteria biomass is produced annually in eutrophic lakes, residues from CBB may contribute to the nitrogen/carbon cycles and macro‐fauna growth in these ecosystems.
Xin Liu; Rui He; Yuan Shi; Zaisheng Yan; Changhui Wang; Helong Jiang. Identifying the Chemical Composition of Decomposed Residues From Cyanobacterial Bloom Biomass by Pyrolysis-GC/MS. CLEAN – Soil, Air, Water 2016, 44, 1636 -1643.
AMA StyleXin Liu, Rui He, Yuan Shi, Zaisheng Yan, Changhui Wang, Helong Jiang. Identifying the Chemical Composition of Decomposed Residues From Cyanobacterial Bloom Biomass by Pyrolysis-GC/MS. CLEAN – Soil, Air, Water. 2016; 44 (12):1636-1643.
Chicago/Turabian StyleXin Liu; Rui He; Yuan Shi; Zaisheng Yan; Changhui Wang; Helong Jiang. 2016. "Identifying the Chemical Composition of Decomposed Residues From Cyanobacterial Bloom Biomass by Pyrolysis-GC/MS." CLEAN – Soil, Air, Water 44, no. 12: 1636-1643.
Submerged macrophytes can promote the water quality and then facilitate the maintenance of good ecological status in aquatic environments, but have been subjected to severe reduction due to eutrophication. This study investigated the effect of sediment microbial fuel cell (SMFC) on the growth of submerged macrophyte Potamogeton malaianus in degenerated sediments taken from a shallow eutrophic lake. Over 6 weeks, it was found that the growth of P. malaianus was significantly enhanced by both closed-circuit SMFC and open-circuit SMFC in term of survival rate and biomass contents. Survival rate of plants were 103.7% and 107.4% in closed-circuit and open-circuit SMFC treatments respectively, but only 18.5% with only plants without SMFC due to unfavorable environments in sediments. Obvious difference in physicochemical properties of sediments was not observed in the three treatments. However, high-throughput sequencing showed higher abundances of iron-reducing Geobacter, Desulfuromonas and Geothrix in bulk sediments with closed-circuit SMFC, and plant growth-promoting Pandoraea and Methylophilus in sediments with open-circuit SMFC at the end of experiment. These distinct bacterial communities might regulate nutrients/trace metals availability to plants and then make some contribution to plant growth. SMFC employment thus provided an alternative strategy for re-establishment of aquatic macrophytes in sediment-contaminated aquatic environments.
Yan-Li Zhou; Hui-Fang Wu; Zai-Sheng Yan; Haiyuan Cai; He-Long Jiang. The enhanced survival of submerged macrophyte Potamogeton malaianus by sediment microbial fuel cells. Ecological Engineering 2016, 87, 254 -262.
AMA StyleYan-Li Zhou, Hui-Fang Wu, Zai-Sheng Yan, Haiyuan Cai, He-Long Jiang. The enhanced survival of submerged macrophyte Potamogeton malaianus by sediment microbial fuel cells. Ecological Engineering. 2016; 87 ():254-262.
Chicago/Turabian StyleYan-Li Zhou; Hui-Fang Wu; Zai-Sheng Yan; Haiyuan Cai; He-Long Jiang. 2016. "The enhanced survival of submerged macrophyte Potamogeton malaianus by sediment microbial fuel cells." Ecological Engineering 87, no. : 254-262.
As a by-product generated increasingly during potable water production, drinking water treatment residue (DWTR) recycling for environmental remediation can lead to a win–win situation. In this study, oxygen-limited heat treatment was applied to DWTR, attempting to tune the properties of DWTR for better recycling. The results showed that after the treatment, N2 sorption capacity of DWTR was enhanced significantly: the specific surface area (SSA) and total pore volume (TPV) increased from 72.7 to 148–184 m2 g−1 and from 0.0746 to 0.189–0.201 cm3 g−1, respectively. The treatment also relatively increased the amorphous Al/Fe contents in DWTR although Al/Fe aging and transformation from hydroxides to oxides with high stability were observed. The retained organic matter (OM) was dominant in humin, with higher aromaticity and lower aliphaticity as the treatment temperature increased. Further analysis suggested that aromaticity increase induced higher SSA, the combined effect of OM aromaticity increase, OM loss (e.g. C in COO−), and metal oxides formation resulted in larger TPV, OM inhibited Al/Fe aging, while Al/Fe oxides formation in turn enhanced OM aromaticity. Additionally, the maximum Hg adsorption capacity of DWTR treated at 200–400 °C (estimated by Langmuir model) increased from 53.5 to 69.9–147 mg g−1, and the lability of heavy metals (e.g. Cu) in DWTR tended to decrease after treatment. The overall results demonstrated that oxygen-limited heat treatment sequestrated C, making DWTR be a more reliable adsorbent.
Changhui Wang; He-Long Jiang; Nannan Yuan; Yuansheng Pei; Zaisheng Yan. Tuning the adsorptive properties of drinking water treatment residue via oxygen-limited heat treatment for environmental recycle. Chemical Engineering Journal 2016, 284, 571 -581.
AMA StyleChanghui Wang, He-Long Jiang, Nannan Yuan, Yuansheng Pei, Zaisheng Yan. Tuning the adsorptive properties of drinking water treatment residue via oxygen-limited heat treatment for environmental recycle. Chemical Engineering Journal. 2016; 284 ():571-581.
Chicago/Turabian StyleChanghui Wang; He-Long Jiang; Nannan Yuan; Yuansheng Pei; Zaisheng Yan. 2016. "Tuning the adsorptive properties of drinking water treatment residue via oxygen-limited heat treatment for environmental recycle." Chemical Engineering Journal 284, no. : 571-581.
In this work, the occurrence and removal of polycyclic aromatic hydrocarbons (PAHs) were investigated in a combination process of anoxic baffled reactor (ABR)-hybrid coagulation/membrane bioreactor (HCMBR) for real textile dyeing wastewater treatment. It was found that the target compounds except for the chrysene, benzo(b)fluoranthene, dibenzo(a,h)anthracene, and benzo(g,hi)perylene occurred widely in raw textile dyeing wastewater, treated effluent and sludge samples. In the raw wastewater, two-ring naphthalene was the dominant compound, while three-ring PAHs predominated in the final effluent. The dominant compounds in the raw sludge samples were phenanthrene, while they were pyrene and indeno(1,2,3-cd)pyrene for final discharge sludge. The combination process achieved over 88% removal for all the PAHs. Low molecular weight (LMW) PAHs might be mainly removed by volatilization, adsorption, and sedimentation in the ABR treatment unit. High molecular weight (HMW) PAHs might be mainly removed by adsorption and sedimentation processes after coagulation and solid–liquid separation in the HCMBR treatment unit. The final discharge of treated textile dyeing wastewater and sludge was biologically safe based on the toxicity evaluation test.
Zaisheng Yan; Haichen Zhang; Huifang Wu; Mingzhong Yang; Shihe Wang. Occurrence and removal of polycyclic aromatic hydrocarbons in real textile dyeing wastewater treatment process. DESALINATION AND WATER TREATMENT 2015, 57, 22564 -22572.
AMA StyleZaisheng Yan, Haichen Zhang, Huifang Wu, Mingzhong Yang, Shihe Wang. Occurrence and removal of polycyclic aromatic hydrocarbons in real textile dyeing wastewater treatment process. DESALINATION AND WATER TREATMENT. 2015; 57 (47):22564-22572.
Chicago/Turabian StyleZaisheng Yan; Haichen Zhang; Huifang Wu; Mingzhong Yang; Shihe Wang. 2015. "Occurrence and removal of polycyclic aromatic hydrocarbons in real textile dyeing wastewater treatment process." DESALINATION AND WATER TREATMENT 57, no. 47: 22564-22572.
A Gram-negative, slightly curved rod-shaped, non-spore-forming diazotrophic bacterium, designated strain TH16T, was isolated from cyanobacterial aggregates taken from eutrophic Lake Taihu, Jiangsu Province, China. The pH range for growth was 5-9 (optimum at pH 7.0), salt range was 0-2% (w/v) NaCl (optimum 0%) and temperature range 20-37℃ (optimum 30℃) in Nutrient Broth. Phylogenetic analysis indicated that strain TH16T clusters near and is closely related to the genus Niveispirillum within the family Rhodospirillaceae of the class Alphaproteobacteria. Within the genus Niveispirillum, strain TH16T was most closely related to N. irakense DSM 11586T (98.1% 16S rRNA gene sequence similarity) and N. fermenti CC-LY736T (97.0% similarity). G+C content was 64 mol %. The DNA-DNA relatedness of strain TH16T with N. irakense and N. fermenti was 39.6% and 30.1%, respectively. The major respiratory quinone was ubiquinone. The major fatty acids (>10%) were C18 : 1 ω6c/C18:1ω7c (37.9%), C18:1 2-OH (15.1%) and C16:0 3-OH (10.5%). Genes in the puf operon, encoding proteins of the photosynthetic reaction center and core light-harvesting complexes were also present. Based on morphological, chemotaxonomic and phylogenetic data, strain TH16T represents a novel species within the genus Niveispirillum, for which we propose the name Niveispirillum cyanobacteriorum sp. nov. The type strain is TH16T (=CGMCC 1.12958T =LMG 28334T).
Haiyuan Cai; Yanan Wang; Huacheng Xu; Zaisheng Yan; Bin Jia; Abdul Majid Maszenan; He-Long Jiang. Niveispirillum cyanobacteriorum sp. nov., a nitrogen-fixing bacterium isolated from cyanobacterial aggregates in a eutrophic lake. International Journal of Systematic and Evolutionary Microbiology 2015, 65, 2537 -2541.
AMA StyleHaiyuan Cai, Yanan Wang, Huacheng Xu, Zaisheng Yan, Bin Jia, Abdul Majid Maszenan, He-Long Jiang. Niveispirillum cyanobacteriorum sp. nov., a nitrogen-fixing bacterium isolated from cyanobacterial aggregates in a eutrophic lake. International Journal of Systematic and Evolutionary Microbiology. 2015; 65 (8):2537-2541.
Chicago/Turabian StyleHaiyuan Cai; Yanan Wang; Huacheng Xu; Zaisheng Yan; Bin Jia; Abdul Majid Maszenan; He-Long Jiang. 2015. "Niveispirillum cyanobacteriorum sp. nov., a nitrogen-fixing bacterium isolated from cyanobacterial aggregates in a eutrophic lake." International Journal of Systematic and Evolutionary Microbiology 65, no. 8: 2537-2541.
This study investigated the interaction of the macrophyte Acorus calamus and sediment microbial fuel cells (SMFC) during the degradation of high molecular weight-polycyclic aromatic hydrocarbons (HMW-PAHs) in sediments. Over 367-days, the combination of macrophyte and SMFC led to an increase in pyrene and benzo[a]pyrene degradation rates by at least 70% compared to SMFC or macrophyte alone. While either the macrophyte or SMFC increased redox potential in sediments, redox potentials near the anode (approximately 6 cm depth) in the macrophyte-SMFC combination were markedly lower than that in the only macrophyte treatment. Moreover, rhizospheric bacterial communities in macrophyte-SMFC and macrophyte treatments were distinctly different. Aerobic genera (Vogesella, Pseudomonas, Flavobacterium and Rhizobium) and anaerobic genera (Longilinea, Bellilinea, Desulfobacca and Anaeromyxobacter) became dominant in the rhizosphere in macrophyte and macrophyte-SMFC treatments, respectively. In addition, the macrophyte-SMFC combination improved the numbers of not only aerobic but anaerobic PAHs degraders in sediments. So, the SMFC employment facilitated the formation of anoxic zones in sediments with oxygen loss and exudates from the roots. As a result, cooperation of anaerobic/aerobic microbial metabolism for accelerating HMW-PAHs removal occurred within sediments after combining macrophytes with SMFC.
Zaisheng Yan; Helong Jiang; Haiyuan Cai; Yanli Zhou; Lee R. Krumholz. Complex Interactions Between the Macrophyte Acorus Calamus and Microbial Fuel Cells During Pyrene and Benzo[a]Pyrene Degradation in Sediments. Scientific Reports 2015, 5, srep10709 .
AMA StyleZaisheng Yan, Helong Jiang, Haiyuan Cai, Yanli Zhou, Lee R. Krumholz. Complex Interactions Between the Macrophyte Acorus Calamus and Microbial Fuel Cells During Pyrene and Benzo[a]Pyrene Degradation in Sediments. Scientific Reports. 2015; 5 (1):srep10709.
Chicago/Turabian StyleZaisheng Yan; Helong Jiang; Haiyuan Cai; Yanli Zhou; Lee R. Krumholz. 2015. "Complex Interactions Between the Macrophyte Acorus Calamus and Microbial Fuel Cells During Pyrene and Benzo[a]Pyrene Degradation in Sediments." Scientific Reports 5, no. 1: srep10709.
The removal of pyrene and benzo[a]pyrene (BaP) were investigated in freshwater sediments with amendment of seven different organic matters including cyanobacteria-derived organic matter (COM), plant-derived organic matter (POM), and humic substances (HS). During the 210 days of experiments, the amendment of COM or HS enhanced significantly the removal of pyrene and BaP in sediments, especially with fresh COM (FCOM) treatment much superior to HS. On the contrary, degradation of these polycyclic aromatic hydrocarbons (PAHs) was not significantly improved and even inhibited in POM-amended sediments. The first-order rate constants of pyrene and BaP degradation in the FCOM-amended sediments reached 0.00540±0.00017d(-1) and 0.00517±0.00057d(-1), respectively, and were about three and five folds of those in the control treatment. The enhanced PAHs degradation in FCOM-amended sediments was related to higher PAH-degrading bacteria number and bioavailability with a result of biostimulation and priming effect by labile carbon and high-value nutrition in FCOM. Thus, this study improved our understanding about effects of settled biomass from cyanobacterial blooms, which occurred frequently in eutrophic aquatic ecosystems, on the natural attenuation of PAHs in sediments. Furthermore, this study would also help develop a new promising approach to remediate PAH-contaminated sediments through utilization of cyanobacterial bloom biomass.
Zaisheng Yan; Helong Jiang; Xiaohong Li; Yuan Shi. Accelerated removal of pyrene and benzo[a]pyrene in freshwater sediments with amendment of cyanobacteria-derived organic matter. Journal of Hazardous Materials 2014, 272, 66 -74.
AMA StyleZaisheng Yan, Helong Jiang, Xiaohong Li, Yuan Shi. Accelerated removal of pyrene and benzo[a]pyrene in freshwater sediments with amendment of cyanobacteria-derived organic matter. Journal of Hazardous Materials. 2014; 272 ():66-74.
Chicago/Turabian StyleZaisheng Yan; Helong Jiang; Xiaohong Li; Yuan Shi. 2014. "Accelerated removal of pyrene and benzo[a]pyrene in freshwater sediments with amendment of cyanobacteria-derived organic matter." Journal of Hazardous Materials 272, no. : 66-74.
Dissolved organic matter (DOM) affects the toxicity, mobility and bioavailability of metals in aquatic environment. In this study, the interactions between two metals of environmental concern [Cu(II) and Fe(III)] with DOM in a euthrophic algae-rich lake (Lake Taihu, China), including dissolved natural organic matter (NOM) and algal extracellular polymeric substance (EPS), were studied using fluorescence excitation-emission matrix (EEM) quenching titration combined with parallel factor (PARAFAC) analysis. Obvious protein-like peaks were detected in algal EPS matrix, while both protein- and humic-like peaks can be found in NOM. PARAFAC analysis identified four fluorescent components, including one humic-, one tryptophan- and two tyrosine-like components, from 114 EEM samples. It was shown that fluorescent tyrosine- (log K(M) > 5.21) and humic-like substances (log K(M) > 4.84) in NOM fraction exhibited higher metal binding capacities than those in EPS matrix, while algal EPS was characterized with a high metal-tryptophan-like substances affinity (log K(M) > 5.08). Moreover, for the eutrophic algae-rich lakes, fluorescent tryptophan- and humic-like substances were responsible for Cu transportation, whereas the mobility of Fe would be related with the tyrosine-like substances. The results facilitate a further insight into the biogeochemical behaviors of metals in eutrophic algae-rich ecosystems as well as other related aquatic environments.
Huacheng Xu; Zaisheng Yan; Haiyuan Cai; Gh Yu; Liuyan Yang; Helong Jiang. Heterogeneity in metal binding by individual fluorescent components in a eutrophic algae-rich lake. Ecotoxicology and Environmental Safety 2013, 98, 266 -272.
AMA StyleHuacheng Xu, Zaisheng Yan, Haiyuan Cai, Gh Yu, Liuyan Yang, Helong Jiang. Heterogeneity in metal binding by individual fluorescent components in a eutrophic algae-rich lake. Ecotoxicology and Environmental Safety. 2013; 98 ():266-272.
Chicago/Turabian StyleHuacheng Xu; Zaisheng Yan; Haiyuan Cai; Gh Yu; Liuyan Yang; Helong Jiang. 2013. "Heterogeneity in metal binding by individual fluorescent components in a eutrophic algae-rich lake." Ecotoxicology and Environmental Safety 98, no. : 266-272.
In shallow aquatic systems, the majority of organic matter mineralization occurs in the sediments. Several factors including temperature control mineralization rates, however, the underlying causes of the effects are not well understood in subtropical lakes. In this study, we determined the influence of temperature on organic matter degradation by taking sediments from four sites in a subtropical large shallow freshwater lake, and monitoring organic matter composition and enzymes in microcosm experiments at five temperatures from 5 to 40°C. Following a three-month incubation, it was found that the mineralization of submerged plants in sediments was strongly influenced by temperature. Removal efficiency of total organic carbon in sediments ranged from 4.3 to 22.6% at 5°C, and reached 46.7–55.5% at 40°C. In addition, the removal efficiency of organic matter and the relative recalcitrant carbon decomposition depended on sediment type. For sediments in the site located in the lake center, recalcitrant and labile carbon decomposition had equivalent responses to the different temperatures. For sediments with dominance of submerged macrophytes, the humic acids were low even at high temperature. Thus, the annual deposition of plant litter in sediments favored organic carbon decomposition rather than humification.
Na Song; Zai-Sheng Yan; Haiyuan Cai; He-Long Jiang. Effect of temperature on submerged macrophyte litter decomposition within sediments from a large shallow and subtropical freshwater lake. Hydrobiologia 2013, 714, 131 -144.
AMA StyleNa Song, Zai-Sheng Yan, Haiyuan Cai, He-Long Jiang. Effect of temperature on submerged macrophyte litter decomposition within sediments from a large shallow and subtropical freshwater lake. Hydrobiologia. 2013; 714 (1):131-144.
Chicago/Turabian StyleNa Song; Zai-Sheng Yan; Haiyuan Cai; He-Long Jiang. 2013. "Effect of temperature on submerged macrophyte litter decomposition within sediments from a large shallow and subtropical freshwater lake." Hydrobiologia 714, no. 1: 131-144.
The phylogenetic diversity of the microbial community assemblage of the carpet-like mucilaginous cyanobacterial blooms in the eutrophic Lake Taihu was investigated. 16S ribosomal DNA clone libraries produced from the DNA of cyanobacterial assemblages that had been washed to remove unattached bacteria contained only cyanobacteria. However, a further treatment which included grinding the freeze-dried material to physically detach cells followed by the removal of larger cells by filtration allowed us to detect a large variety of bacteria within the cyanobacterial bloom community. Interestingly, the dominant members of the microbial community were Planctomycetes followed by Cytophaga–Flavobacterium–Bacteroides (CFB), Betaproteobacteria, and Gammaproteobacteria. The analysis of the 16S ribosomal DNA clone libraries made from enrichment culture revealed much higher phylogenetic diversity of bacteria. Dominant bacterial groups in the enrichment system were identified as members of the Alphaproteobacteria, Betaproteobacteria, Gammaproteobacteria, and Deltaproteobacteria subdivisions, CFB group, and Planctomycetes. In addition, the clone libraries constructed from Planctomycetes-specific 16S ribosomal RNA primers also verified that the enrichment allowed a diversity of Planctomycetes to proliferate, although the community composition was altered after enrichment.
Haiyuan Cai; Zai-Sheng Yan; Ai-Jie Wang; Lee R. Krumholz; He-Long Jiang. Analysis of the Attached Microbial Community on Mucilaginous Cyanobacterial Aggregates in the Eutrophic Lake Taihu Reveals the Importance of Planctomycetes. Microbial Ecology 2013, 66, 73 -83.
AMA StyleHaiyuan Cai, Zai-Sheng Yan, Ai-Jie Wang, Lee R. Krumholz, He-Long Jiang. Analysis of the Attached Microbial Community on Mucilaginous Cyanobacterial Aggregates in the Eutrophic Lake Taihu Reveals the Importance of Planctomycetes. Microbial Ecology. 2013; 66 (1):73-83.
Chicago/Turabian StyleHaiyuan Cai; Zai-Sheng Yan; Ai-Jie Wang; Lee R. Krumholz; He-Long Jiang. 2013. "Analysis of the Attached Microbial Community on Mucilaginous Cyanobacterial Aggregates in the Eutrophic Lake Taihu Reveals the Importance of Planctomycetes." Microbial Ecology 66, no. 1: 73-83.
Caulobacteria are presumed to be responsible for considerable mineralization of organic material in aquatic environments. In this study, a facultative, mesophilic and cellulolytic bacterium Caulobacter sp. FMC1 was isolated from sediments which were taken from a shallow freshwater lake and then enriched with amendment of submerged macrophyte for three months. This strain seemed to evolve a capacity to adapt redox-fluctuating environments, and could degrade cellulose both aerobically and anaerobically. Cellulose degradation percentages under aerobic and anaerobic conditions were approximately 27% and 10% after a 240-h incubation in liquid mediums containing 0.5% cellulose, respectively. Either cellulose or cellobiose alone was able to induce activities of endoglucanase, exoglucanase, and β-1,4-glucosidase. Interestingly, ethanol was produced as the main fermentative product under anaerobic incubation on cellulose. These results could improve our understanding about cellulose-degrading process in aquatic environments, and were also useful in optimizing cellulose bioconversion process for bioethanol production.
Na Song; Hai-Yuan Cai; Zai-Sheng Yan; He-Long Jiang. Cellulose degradation by one mesophilic strain Caulobacter sp. FMC1 under both aerobic and anaerobic conditions. Bioresource Technology 2013, 131, 281 -287.
AMA StyleNa Song, Hai-Yuan Cai, Zai-Sheng Yan, He-Long Jiang. Cellulose degradation by one mesophilic strain Caulobacter sp. FMC1 under both aerobic and anaerobic conditions. Bioresource Technology. 2013; 131 ():281-287.
Chicago/Turabian StyleNa Song; Hai-Yuan Cai; Zai-Sheng Yan; He-Long Jiang. 2013. "Cellulose degradation by one mesophilic strain Caulobacter sp. FMC1 under both aerobic and anaerobic conditions." Bioresource Technology 131, no. : 281-287.