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Yang C, Sun R, Cui J, Yao B, Guo Y. Analysis of dissolved organic matter characteristics in pharmaceutical wastewater via spectroscopy combined with Fourier-transform ion cyclotron resonance mass spectrometry. JOURNAL OF HAZARDOUS MATERIALS 2024; 479:135706. [PMID: 39241358 DOI: 10.1016/j.jhazmat.2024.135706] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/24/2024] [Revised: 08/20/2024] [Accepted: 08/29/2024] [Indexed: 09/09/2024]
Abstract
Studying the changes in organic matter and characteristic pollutants during the treatment of penicillin-containing pharmaceutical wastewater, which can be reflected by changes in dissolved organic matter (DOM), is crucial for improving the effectiveness of wastewater treatment units and systems. Herein, water quality indicators, spectroscopic methods, and Fourier-transform ion cyclotron resonance mass spectrometry were utilized to characterize the general molecular compositions and specific molecular changes in DOM during the treatment of typical penicillin-containing pharmaceutical wastewater, including in each of the influent, physicochemical treatment, biological treatment, oxidation treatment, and effluent stages. The influent exhibited a high organic matter content (concentration of dissolved organic carbon >10,000 mg·L-1), its DOM mainly contained protein- and lignin-like substances composed of CHON and CHONS molecules, and the relative intensity (RI) of penicillin was extremely high (RI = 0.220). Compared with the influent, the abundance of CHON and CHONS molecules detected after physicochemical treatment decreased by 70.3 % and 62.5 %, respectively, and the RI of penicillin decreased by 85.5 %. Biological treatment caused substantial changes in DOM components through oxidation, dealkylation, and denitrification reactions, accounting for 36.8 %, 28.9 %, and 14.8 % of the total identified reactions, respectively. Additionally, lignin-like substances were generated in large quantities, the overall humification level significantly increased, and the RI value increased for the penicillin intermediate, 6-aminopenicillanic acid (6-APA). Oxidation treatment effectively removed phosphorus-containing substances and some lignin-like substances produced by biological treatment; however, it was not effective in removing characteristic pollutants such as 6-APA. Such characteristic substances continued to be present in the effluent, and the DOM mainly contained protein- and humus-like substances, accounting for 30.8 % and 47.3 %, respectively. The study findings reveal the changes in organic matter and characteristic pollutants during the treatment of penicillin-containing wastewater from the perspective of the general molecular composition and specific molecular changes in DOM, providing support for further exploration of wastewater treatment mechanisms and improvements in treatment unit efficiency.
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Affiliation(s)
- Chenqiang Yang
- College of Environmental Science and Engineering, Hebei University of Science and Technology, Shijiazhuang 050018, Hebei, China; Hebei Key Laboratory of Pollution Prevention Biotechnology, Shijiazhuang 050018, Hebei, China
| | - Ruixue Sun
- College of Environmental Science and Engineering, Hebei University of Science and Technology, Shijiazhuang 050018, Hebei, China; Hebei Key Laboratory of Pollution Prevention Biotechnology, Shijiazhuang 050018, Hebei, China
| | - Jiansheng Cui
- College of Environmental Science and Engineering, Hebei University of Science and Technology, Shijiazhuang 050018, Hebei, China; Hebei Key Laboratory of Pollution Prevention Biotechnology, Shijiazhuang 050018, Hebei, China
| | - Bo Yao
- College of Environmental Science and Engineering, Hebei University of Science and Technology, Shijiazhuang 050018, Hebei, China; Hebei Key Laboratory of Pollution Prevention Biotechnology, Shijiazhuang 050018, Hebei, China
| | - Yankai Guo
- College of Environmental Science and Engineering, Hebei University of Science and Technology, Shijiazhuang 050018, Hebei, China; Hebei Key Laboratory of Pollution Prevention Biotechnology, Shijiazhuang 050018, Hebei, China.
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Sanchez AA, Haas K, Jackisch C, Hedrich S, Lau MP. Enrichment of dissolved metal(loid)s and microbial organic matter during transit of a historic mine drainage system. WATER RESEARCH 2024; 266:122336. [PMID: 39216129 DOI: 10.1016/j.watres.2024.122336] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/18/2024] [Revised: 08/23/2024] [Accepted: 08/24/2024] [Indexed: 09/04/2024]
Abstract
Water quality degradation by decommissioned mining sites is an environmental issue recognized globally. In the Ore mountains of Central Europe, a wide array of contaminants is released by abandoned under- and aboveground mining sites threatening the quantity and quality of surface and groundwater resources. Here, we focus on the less-explored internal pollution processes within these mines involving organic carbon and microorganisms in trace metal(loid)s mobilization processes. Over an 18-month period, we conducted hydrological and biogeochemical monitoring at the Reiche Zeche mine, a former lead-zinc-silver mine, in Germany, reaching 230 meters below ground, well below the critical zone. Our results show strong seasonal fluctuations in water availability, concentrations of metal(loid)s, pH, and dissolved organic matter (DOM) components across multiple depths. Excess metal(loid) presence during high flow conditions indicated mobilization behavior deviating from conservative dilution. Our findings reveal strong positive correlations between metal(loid) variability and pH (0.894), and between metal(loid) variability and the DOM fluorescent component C2 (-0.910), a proxy for microbial activity. Accordingly, the microbial processes may significantly contribute to the observed metal(loid) composition and fluxes. By elucidating the intricate roles of hydrological and biogeochemical factors in trace metal(loid) mobilization, our research offers a comprehensive framework for improving mine water management and remediation, potentially informing global environmental policies and sustainable mining practices.
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Affiliation(s)
- Anita Alexandra Sanchez
- Institute of Mineralogy, Technische Universität Bergakademie Freiberg, Brennhausgasse 14, 09599 Freiberg, Germany.
| | - Karl Haas
- Institute of Drilling Technology and Fluid Mining, Technische Universität Bergakademie Freiberg, Germany
| | - Conrad Jackisch
- Institute of Drilling Technology and Fluid Mining, Technische Universität Bergakademie Freiberg, Germany
| | - Sabrina Hedrich
- Institute of Biosciences, Technische Universität Bergakademie Freiberg, Germany
| | - Maximilian P Lau
- Institute of Mineralogy, Technische Universität Bergakademie Freiberg, Brennhausgasse 14, 09599 Freiberg, Germany; Interdisciplinary Environmental Research Centre, Technische Universität Bergakademie Freiberg, Germany
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Liu Y, Zhang X, Zheng J, He J, Lü C. Reductive dissolution of As-bearing iron oxides: Mediating mechanism of fulvic acid and dissimilated iron reducing bacteria. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 935:173443. [PMID: 38782281 DOI: 10.1016/j.scitotenv.2024.173443] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/15/2024] [Revised: 05/17/2024] [Accepted: 05/20/2024] [Indexed: 05/25/2024]
Abstract
Fulvic acid (FA) and iron oxides often play regulating roles in the geochemical behavior and ecological risk of arsenic (As) in terrestrial ecosystems. FA can act as electron shuttles to facilitate the reductive dissolution of As-bearing iron (hydr)oxides. However, the influence of FA from different sources on the sequential conversion of Fe/As in As-bearing iron oxides under biotic and abiotic conditions remains unclear. In this work, we exposed prepared As-bearing iron oxides to FAs derived from lignite (FAL) and plant peat (FAP) under anaerobic conditions, tracked the fate of Fe and As in the aqueous phase, and investigated the reduction transformation of Fe(III)/As(V) with or without the presence of Shewanella oneidensis MR-1. The results showed that the reduction efficiency of Fe(III)/As(V) was increased by MR-1, through its metabolic activity and using FAs as electron shuttles. The reduction of Fe(III)/As(V) was closely associated with goethite being more conducive to Fe/As reduction compared to hematite. It is determined that functional groups such as hydroxy, carboxy, aromatic, aldehyde, ketone and aliphatic groups are the primary electron donors. Their reductive capacities rank in the following sequence: hydroxy> carboxy, aromatic, aldehyde, ketone> aliphatic group. Notably, our findings suggest that in the biotic reduction, Fe significantly reduction precedes As reduction, thereby influencing the latter's reduction process across all incubation systems. This work provides empirical support for understanding iron's role in modulating the geochemical cycling of As and is of significant importance for assessing the release risk of arsenic in natural environments.
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Affiliation(s)
- Yangzheng Liu
- Ministry of Education Key Laboratory of Ecology and Resource Use of the Mongolian Plateau & Inner Mongolia Key Laboratory of Grassland Ecology, School of Ecology and Environment, Inner Mongolia University, 010021 Hohhot, China
| | - Xin Zhang
- Ministry of Education Key Laboratory of Ecology and Resource Use of the Mongolian Plateau & Inner Mongolia Key Laboratory of Grassland Ecology, School of Ecology and Environment, Inner Mongolia University, 010021 Hohhot, China; Forest Ecosystem National Observation and Research Station of Greater Khingan Mountains in Inner Mongolia, Genhe 022350, China.
| | - Jinli Zheng
- Ministry of Education Key Laboratory of Ecology and Resource Use of the Mongolian Plateau & Inner Mongolia Key Laboratory of Grassland Ecology, School of Ecology and Environment, Inner Mongolia University, 010021 Hohhot, China
| | - Jiang He
- Ministry of Education Key Laboratory of Ecology and Resource Use of the Mongolian Plateau & Inner Mongolia Key Laboratory of Grassland Ecology, School of Ecology and Environment, Inner Mongolia University, 010021 Hohhot, China; Institute of Environmental Geology, Inner Mongolia University, 010021 Hohhot, China
| | - Changwei Lü
- Ministry of Education Key Laboratory of Ecology and Resource Use of the Mongolian Plateau & Inner Mongolia Key Laboratory of Grassland Ecology, School of Ecology and Environment, Inner Mongolia University, 010021 Hohhot, China; Institute of Environmental Geology, Inner Mongolia University, 010021 Hohhot, China.
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Gao Z, Zhang R, Zhang Z, Zhao B, Chen D, Kersten M, Guo H. Groundwater irrigation induced variations in DOM fluorescence and arsenic mobility. JOURNAL OF HAZARDOUS MATERIALS 2024; 476:135229. [PMID: 39024759 DOI: 10.1016/j.jhazmat.2024.135229] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/15/2024] [Revised: 07/05/2024] [Accepted: 07/14/2024] [Indexed: 07/20/2024]
Abstract
Dissolved organic matter (DOM) plays a predominant role in groundwater arsenic (As) mobility. However, the temporal-spatial variations in DOM fluorescent characteristics and their effects on As mobility induced by groundwater irrigation remain unclear. To address these issues, groundwater from multilevel and irrigation wells in Zones I and II (with low- and high-As groundwater irrigation, respectively) from the Hetao Basin, China, were monitored in both non-irrigation (NIG) and irrigation (IG) seasons. Upon irrigation, the irrigation return increased the relative abundance of protein- and humic-like DOM in shallow groundwater from Zone I with Ca-type groundwater and Zone II with Na-type groundwater irrigation, respectively. The introduced dissolved oxygen by irrigation return decreased As concentrations by 22 % and 6 % on average in shallow groundwater from Zones I and II, respectively. However, the pumping-induced lateral recharge of lower- and higher-As groundwater led to an average 17 % decrease and 38 % increase in As concentrations in deeper groundwater from the two zones, respectively. The increased degradation of protein-like DOM may also contribute to the elevated As concentrations in deep groundwater from Zone II. The study provides insights into the dependence of irrigation-induced variations in DOM fluorescence and As concentrations on geochemicals of irrigation groundwater and aquifer hydrogeological conditions.
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Affiliation(s)
- Zhipeng Gao
- MOE Key Laboratory of Groundwater Circulation and Evolution & School of Water Resources and Environment, China University of Geosciences (Beijing), Beijing 100083, China; State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences (Beijing), Beijing 100083, China
| | - Rongshe Zhang
- Zhejiang Industry Polytechnic College, Shaoxing 312000, China
| | - Zhuo Zhang
- Tianjin Center of Geological Survey, China Geological Survey, Tianjin 300170, China
| | - Bo Zhao
- MOE Key Laboratory of Groundwater Circulation and Evolution & School of Water Resources and Environment, China University of Geosciences (Beijing), Beijing 100083, China
| | - Dou Chen
- MOE Key Laboratory of Groundwater Circulation and Evolution & School of Water Resources and Environment, China University of Geosciences (Beijing), Beijing 100083, China
| | - Michael Kersten
- Environmental Geochemistry Group, Institute of Geosciences, Johannes Gutenberg-University, Mainz 55099, Germany
| | - Huaming Guo
- MOE Key Laboratory of Groundwater Circulation and Evolution & School of Water Resources and Environment, China University of Geosciences (Beijing), Beijing 100083, China; State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences (Beijing), Beijing 100083, China.
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Jin C, Li Z, Huang M, Ding X, Chen J, Li B. Mechanisms of cadmium release from manganese-rich sediments driven by exogenous DOM and the role of microorganisms. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2024; 274:116237. [PMID: 38503104 DOI: 10.1016/j.ecoenv.2024.116237] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2023] [Revised: 02/29/2024] [Accepted: 03/15/2024] [Indexed: 03/21/2024]
Abstract
Dissolved organic matter (DOM) is a crucial component of natural sediments that alters Cd sequestration. Nevertheless, how different types of DOM fuel Cd mobilization in Mn-rich sediments has not been elucidated. In the present study, four typical DOM, fluvic acid (FA), bovine serum albumin (BSA), sodium alginate (SA), and sodium dodecyl benzene sulfonate (SDBS), were used to amend Cd-contaminated sediment to study their effects on Cd/Mn biotransformation and microbial community response. The results demonstrated that different DOM drive microbial community shifts and enhance microbially mediated Mn oxide (MnO) reduction and Cd release. The amendment of terrestrial- and anthropogenic-derived DOM (FA and SDBS) mainly contributed to enriching Mn-reducing bacteria phylum Proteobacteria, and its abundance increased by 38.16-74.47 % and 56.41-73.98 %, respectively. Meanwhile, microbial-derived DOM (BSA and SA) mainly stimulated the abundances of metal(loid)-resistant bacteria phylum Firmicutes. Accompanied by microbial community structure, diversity, and co-occurrence network shifts, the DOM concentration and oxidation-reduction potential changed, resulting in enhanced Cd mobilization. Importantly, FA stimulated Cd release most remarkably, probably because of the decreased cooperative interactions between bacterial populations, stronger reduction of MnOs, and higher aromaticity and hydrophobicity of the sediment DOM after amendment. This study linked DOM types to functional microbial communities, and explored the potential roles of different DOM types in Cd biotransformation in lake sediments.
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Affiliation(s)
- Changsheng Jin
- School of Life Science, Shaoxing University, Huancheng West Road 508, Shaoxing 312000, PR China.
| | - Zhongwu Li
- College of Environmental Science and Engineering, Hunan University, Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China; College of Geography Science, Hunan Normal University, Changsha 410081, PR China; Hunan Provincial Key Laboratory for Eco-environmental Changes and Carbon Sequestration of the Dongting Lake Basin, Hunan Normal University, Changsha 410081, PR China.
| | - Mei Huang
- College of Environmental Science and Engineering, Hunan University, Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China.
| | - Xiang Ding
- College of Environmental Science and Engineering, Hunan University, Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China.
| | - Jia Chen
- College of Environmental Science and Engineering, Hunan University, Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China.
| | - Bolin Li
- College of Environmental Science and Engineering, Hunan University, Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China.
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Zeng K, Huang X, Dai C, He C, Chen H, Guo J, Xin G. Bacterial community regulation of soil organic matter molecular structure in heavy metal-rich mangrove sediments. JOURNAL OF HAZARDOUS MATERIALS 2024; 465:133086. [PMID: 38035526 DOI: 10.1016/j.jhazmat.2023.133086] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/05/2023] [Revised: 10/30/2023] [Accepted: 11/22/2023] [Indexed: 12/02/2023]
Abstract
Heavy metals (HMs) profoundly impact soil carbon storage potential primarily through soil carbon structure. The association between HM content and soil carbon structure in mangrove sediments remains unclear, likely due to the involvement of microorganisms. In this study, surface sediments in the Futian National Mangrove Nature Reserve were sampled to investigate the chemical structure of soil organic carbon (SOC), the molecular composition of dissolved organic matter (DOM), and potential interactions with microorganisms. HMs, except for Ni, were positively correlated with soil carbon. HMs significantly reduced the alkyl C/O-alkyl C ratio, aromaticity index, and aromatic C values, but increased the labile carboxy/amide C and carbonyl C ratio in SOC. HMs also increased DOM stability, as reflected by the reduced abundance of labile DOM (lipids and proteins) and increased proportion of stable DOM (tannins and condensed aromatics). Bacteria increased the decomposition of labile DOM components (unsaturated hydrocarbons) and the accumulation of stable DOM components (lignins) under HM enrichment. In addition, the association between the bacterial groups and DOM molecules was more robust than that with fungal groups, indicating bacteria had a more significant impact on DOM molecular composition. These findings help in understanding the molecular mechanisms of soil carbon storage in HM-rich mangroves.
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Affiliation(s)
- Kai Zeng
- State Key Lab of Biocontrol, Guangdong Provincial Key Laboratory of Plant Resources, School of Agriculture, Shenzhen Campus of Sun Yat-sen University, Shenzhen 518107, China
| | - Xiaochen Huang
- State Key Lab of Biocontrol, Guangdong Provincial Key Laboratory of Plant Resources, School of Agriculture, Shenzhen Campus of Sun Yat-sen University, Shenzhen 518107, China.
| | - Chuanshun Dai
- State Key Lab of Biocontrol, Guangdong Provincial Key Laboratory of Plant Resources, School of Agriculture, Shenzhen Campus of Sun Yat-sen University, Shenzhen 518107, China
| | - Chuntao He
- State Key Lab of Biocontrol, Guangdong Provincial Key Laboratory of Plant Resources, School of Agriculture, Shenzhen Campus of Sun Yat-sen University, Shenzhen 518107, China
| | - Hao Chen
- State Key Lab of Biocontrol, Guangdong Provincial Key Laboratory of Plant Resources, School of Agriculture, Shenzhen Campus of Sun Yat-sen University, Shenzhen 518107, China
| | - Junjie Guo
- State Key Lab of Biocontrol, Guangdong Provincial Key Laboratory of Plant Resources, School of Agriculture, Shenzhen Campus of Sun Yat-sen University, Shenzhen 518107, China
| | - Guorong Xin
- State Key Lab of Biocontrol, Guangdong Provincial Key Laboratory of Plant Resources, School of Agriculture, Shenzhen Campus of Sun Yat-sen University, Shenzhen 518107, China.
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Luo M, Wang S, Zhang S, Zhou T, Lu J, Guo S. Ecological role of reed belts in lakeside zone: Impacts on nutrient retention and bacterial community assembly during Hydrilla verticillata decomposition. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2024; 354:120489. [PMID: 38402786 DOI: 10.1016/j.jenvman.2024.120489] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2023] [Revised: 02/02/2024] [Accepted: 02/21/2024] [Indexed: 02/27/2024]
Abstract
Reed belts acting as basic nutrient filters are important parts of lake buffer riparian zones. However, little is known about their impacts on nutrient release and bacterial community during plant litter decomposition. In this study, a field experiment was conducted in west-lake Taihu to monitor the changes in nutrients, bacterial enzymatic activities, and bacterial community in plant debris during Hydrilla verticillata (H. verticillata) decomposition in open water (HvC) and reed belts (HvL) area for 126 days. We found that there was lower temperature but higher nutrient concentrations in overlying water in HvL than HvC. Partial least squares path modeling revealed that environmental parameters in overlying water had important impacts on bacterial activities and nutrient release (such as alkaline phosphatase, cellulase, and soluble sugar) and therefore affected dissolved organic matter components in plant debris. According to Illumina sequencing, 46,003 OTUs from 10 dominant phyla were obtained and Shannon index was higher in HvL than HvC at the same sampling time. Neutral community model explained 49% of bacterial community variance and immigration rate by the estimate of dispersal in HvC (Nm: 27,154) and HvL (Nm: 25,765), respectively. Null model showed stochastic factors governed the bacterial community assembly in HvC (66.67%) and HvL (87.28%). TP and pH were key factors affecting the bacterial community structure at the phylum level. More hubs and complex interactions among bacteria were observed in HvL than HvC. Function analysis showed bacterial community had important role in carbon, organic phosphorus, and nitrogen removal but phosphorus-starvation was detected in debris of H. verticillata. This study provides useful information for understanding the changes in nutrients and bacterial community in litter during H. verticillata decomposition and highlights the role of reed belts on retained plant litter to protect lake from pollution.
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Affiliation(s)
- Min Luo
- Ministry of Education Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Hohai University, Nanjing, 210098, China; College of Environment, Hohai University, Nanjing, 210098, China
| | - Shuncai Wang
- Ministry of Education Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Hohai University, Nanjing, 210098, China; College of Environment, Hohai University, Nanjing, 210098, China
| | - Songhe Zhang
- Ministry of Education Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Hohai University, Nanjing, 210098, China; College of Environment, Hohai University, Nanjing, 210098, China.
| | - Tiantian Zhou
- Ministry of Education Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Hohai University, Nanjing, 210098, China; College of Environment, Hohai University, Nanjing, 210098, China
| | - Jianhui Lu
- Ministry of Education Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Hohai University, Nanjing, 210098, China; College of Environment, Hohai University, Nanjing, 210098, China
| | - Shaozhuang Guo
- Ministry of Education Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Hohai University, Nanjing, 210098, China; College of Environment, Hohai University, Nanjing, 210098, China
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