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Wang B, Zhang C, Li K, Huang J, Sun J. Induced domestication of humic reduction-denitrification coupled bacteria improved treatment of sediment: Performance, remediation effect, and metabolic mechanisms. ENVIRONMENTAL RESEARCH 2024; 251:118761. [PMID: 38518914 DOI: 10.1016/j.envres.2024.118761] [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: 11/21/2023] [Revised: 03/01/2024] [Accepted: 03/19/2024] [Indexed: 03/24/2024]
Abstract
The high organic matter in river sediment primarily induces black and odorous rebound. Traditional humic-reducing bacteria demonstrate relatively single metabolic functions and restrain the remediation within complex sediment environments. In addition, Ca(NO3)2 is commonly utilized in synergistic with bioremediation to improve the reducing environment of sediments. In this study, a multifunctional bacterial community with humic reduction-denitrification coupled bacteria was domesticated by the step-feeding strategy in an anaerobic baffle reactor (ABR). The performance, remediation effect, and metabolic mechanisms were analyzed. The results indicated that humic-reducing bacteria (HRB) and denitrifying-humic-reducing bacteria (DF/HRB) have quinone-reduction and denitrification capabilities. The synergistic effect of DF/HRBs and Ca(NO3)2 was superior to HRBs and Ca(NO3)2 on the removal of total organic matter(TOM). Microbial community structure analysis revealed an enhanced relative abundance of denitrification and humic-reducing bacteria (e.g., Thauera, Pseudomonas, Sulfurospirillum, Desulfovibrio, Geobacter) in the DF/HRB, resulting in a superior synergistic effect of DF/HRBs with Ca(NO3)2. This work helps to present an innovative approach to domesticate humic-reducing bacteria suited for the remediation environment effectively. It also expands the application of humic-reducing bacteria for in-situ anaerobic remediation of river sediments.
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Affiliation(s)
- Bin Wang
- School of Environmental Science and Engineering, Tianjin University, Tianjin, 300350, PR China
| | - Chao Zhang
- School of Environmental Science and Engineering, Tianjin University, Tianjin, 300350, PR China; Tianjin Academy of Eco-Environmental Sciences, Nankai, Tianjin, 300191, PR China
| | - Ketong Li
- School of Environmental Science and Engineering, Tianjin University, Tianjin, 300350, PR China
| | - Jianjun Huang
- School of Environmental Science and Engineering, Tianjin University, Tianjin, 300350, PR China
| | - Jingmei Sun
- School of Environmental Science and Engineering, Tianjin University, Tianjin, 300350, PR China.
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Wei H, Liu C, Cui X, Shen Z, Wang J. Distribution characteristics of microorganisms in sediments of Dagu River and their biological indicator function for evaluating eco-environmental quality of rural river. ENVIRONMENTAL RESEARCH 2024; 245:118032. [PMID: 38159669 DOI: 10.1016/j.envres.2023.118032] [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: 10/30/2023] [Revised: 12/20/2023] [Accepted: 12/22/2023] [Indexed: 01/03/2024]
Abstract
The microorganisms in sediments play a crucial role in biogeochemical cycle processes, and numerous studies have shown that microbial community is closely related to environmental factors. However, the usability of sediment microorganisms to evaluate the eco-environment quality of rural rivers has not been adequately explored. This study investigated the distribution characteristics and response of sediment microorganisms to environmental parameters and benthic organisms. Based on the environmental parameters and benthic community indices, the 12 stations were divided into high-polluted group A, moderate-polluted group B and low-polluted group C. Station DG01 and DG02 in group A had the highest level of As and Ni pollution and nutrient concentration, and DG09 in group A had the lowest benthic diversity. Correspondingly, group A had the lowest abundance of Proteobacteria, which has a higher requirement for the environment than Planctomycetes. Group B had the highest sulfide level (97.45 mg/kg), and bacteria (Thiobacillus, Sulfurisoma and Sulfuritalea) with genes involved in sulfur cycling were more enriched in this group. Group C had the lowest level of total nitrogen (243.36 mg/kg), and Rhodanobacteraceae in Xanthomonadales might be a key bioindicator for low nitrogen. In addition, Chlorophyta was found to be more susceptible to heavy metals, and moreover co-occurrence networks showed that microeukaryotes were more sensitive to heavy metal pollution compared to benthic animals and prokaryotes. Therefore, this study suggested that benthic microorganisms especially microeukaryotes could be used as good indicators for evaluating the eco-environmental quality of rural rivers.
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Affiliation(s)
- Hongqing Wei
- College of Marine Life Sciences, Ocean University of China, Qingdao, 266003, China
| | - Cong Liu
- College of Marine Life Sciences, Ocean University of China, Qingdao, 266003, China
| | - Xumeng Cui
- College of Marine Life Sciences, Ocean University of China, Qingdao, 266003, China
| | - Zhonghua Shen
- College of Marine Life Sciences, Ocean University of China, Qingdao, 266003, China; Shandong Bureau Test Center of China General Administration of Metallurgical Geology, Jinan, 250013, China.
| | - Jun Wang
- College of Marine Life Sciences, Ocean University of China, Qingdao, 266003, China.
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Zhang C, Li M, Sun J, Huang J, Chang S. Fluorescein diacetate hydrolytic activity as a sensitive tool to quantify nitrogen/sulfur gene content in urban river sediments in China. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:62544-62552. [PMID: 36943562 DOI: 10.1007/s11356-023-26543-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/11/2022] [Accepted: 03/15/2023] [Indexed: 05/10/2023]
Abstract
The relative abundance of functional genes used to quantify the abundance of functional genes in communities is controversial. Quantitative PCR (qPCR) technology offers a powerful tool for quantifying functional gene abundance. However, humic substances can inhibit qPCR in sediment/soil samples. Therefore, finding a convenient and effective quantitative analysis method for sediment/soil samples is necessary. The functional genes and physicochemical properties in sediments with different-level pollutions were analyzed in this study. Correlations between physicochemical properties and the relative abundance of functional genes were used to test whether relative abundance in gene prediction quantifies the abundance of functional genes. The abundance of functional genes could be corrected by multiplying the fluorescein diacetate (FDA) hydrolytic rates by the relative abundance of functional genes since the FDA assay has been widely used as a rapid and sensitive method for quantifying microbial activity in sediments. Redundancy analysis showed significant interrelations between the functional genes and the physicochemical properties of sediments. The relative abundance of functional genes is unreliable for quantifying the abundance of functional genes because of the weak correlation (R < 0.5, P < 0.05) between different pollutants and the relative abundance of functional genes. However, a significant positive correlation between concentrations of different pollutants and the activities of associated enzymes was obtained (R > 0.933, P < 0.05), which revealed that the abundance of functional genes could be reliably quantified by the relative abundance and FDA hydrolytic rate. This study proposed an alternative method besides qPCR to quantify the absolute abundance of functional genes, which overcomes the problem of humic interference in the quantitative analysis of sediment/soil samples.
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Affiliation(s)
- Chao Zhang
- School of Environmental Science and Engineering, Tianjin University, Tianjin, 300350, People's Republic of China
- Tianjin Academy of Eco-Environmental Sciences, Nankai, Tianjin, 300191, China
| | - Meng Li
- School of Environmental Science and Engineering, Tianjin University, Tianjin, 300350, People's Republic of China
- North China Municipal Engineering Design & Research Institute Co, LTD., Tianjin, 300074, China
| | - Jingmei Sun
- School of Environmental Science and Engineering, Tianjin University, Tianjin, 300350, People's Republic of China.
| | - Jianjun Huang
- School of Environmental Science and Engineering, Tianjin University, Tianjin, 300350, People's Republic of China
| | - Suyun Chang
- School of Environmental Science and Engineering, Tianjin University, Tianjin, 300350, People's Republic of China
- Tianjin Hydraulic Research Institute, Tianjin, 300061, People's Republic of China
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Musarurwa H, Tavengwa NT. Recyclable polysaccharide/stimuli-responsive polymer composites and their applications in water remediation. Carbohydr Polym 2022; 298:120083. [DOI: 10.1016/j.carbpol.2022.120083] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2022] [Revised: 08/20/2022] [Accepted: 09/02/2022] [Indexed: 11/02/2022]
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Zhang C, Li M, Sun J, Zhang S, Huang J. The mechanism of C-N-S interconnection degradation in organic-rich sediments by Ca(NO 3) 2 - CaO 2 synergistic remediation. ENVIRONMENTAL RESEARCH 2022; 214:113992. [PMID: 35921905 DOI: 10.1016/j.envres.2022.113992] [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: 05/02/2022] [Revised: 07/17/2022] [Accepted: 07/25/2022] [Indexed: 06/15/2023]
Abstract
The rebound of black-odorous occurred in organic-rich sediments has become a critical issue due to its great harm to the ecological environment. Elements such as S, C, and N play a crucial role in the biogeochemical cycle of black-odorous rivers. As electronic acceptors, Ca(NO3)2 and CaO2 can effectively remove acidified volatile sulfide (AVS) and organic matter to control the black-odorous rebound. However, the remediation mechanisms in organic-rich sediments by Ca(NO3)2 and CaO2 are unclear. The present study explored the mechanism of C-N-S interconnection degradation in organic-rich urban river sediments by adding different ratios and sequences of Ca(NO3)2 and CaO2. The results showed that Ca(NO3)2 remediation followed by CaO2 and the accepted electron ratio 1:1 of Ca(NO3)2 to CaO2 is an effective method for controlling the rebound of black-odorous and reducing the accumulation NO2--N. Mainly attributed to that, CaO2 enhanced the degradation of organic matter by stimulating enzymatic activities in the sediments, which is also the main reason for controlling the rebound of black-odorous. Since CaO2 releases O2 and •OH, which inhibit nosZgenes, NO2--N accumulates when remedied simultaneously with Ca(NO3)2 and CaO2. Co-occurrence network analysis illustrated that sulfur-driven autotrophic denitrification bacteria, heterotrophic denitrifying bacteria, and sulfate-reducing bacteria interact strongly inside one module, clarifying a solid interaction of C-N-S substances among these bacteria. Our results reveal the C-N-S interconnection degradation mechanism and provide a new perspective on applying biochemical remediation in organic-rich urban river sediments.
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Affiliation(s)
- Chao Zhang
- School of Environmental Science and Engineering, Tianjin University, Tianjin, 300350, PR China.
| | - Meng Li
- School of Environmental Science and Engineering, Tianjin University, Tianjin, 300350, PR China; North China Municipal Engineering Design & Research Institute Co, LTD, Tianjin, 300074, China
| | - Jingmei Sun
- School of Environmental Science and Engineering, Tianjin University, Tianjin, 300350, PR China
| | - Shiwei Zhang
- School of Environmental Science and Engineering, Tianjin University, Tianjin, 300350, PR China
| | - Jianjun Huang
- School of Environmental Science and Engineering, Tianjin University, Tianjin, 300350, PR China.
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Li Z, Liu Y, Xie J, Wang G, Cheng X, Zhang J, Sang C, Liu Z. Impact of microecological agents on water environment restoration and microbial community structures of trench system in a Baiyangdian wetland ecosystem. J Appl Microbiol 2021; 132:2450-2463. [PMID: 34319633 DOI: 10.1111/jam.15238] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2021] [Revised: 07/25/2021] [Accepted: 07/27/2021] [Indexed: 11/30/2022]
Abstract
AIMS To evaluate effect of periodic application of effective microorganisms (EM) bacteria and calcium peroxide on water environment restoration of a trench wetland ecosystem and its impact on microbiota in water and sediment. METHODS AND RESULTS The EM bacteria and calcium peroxide were alternately sprayed into the trench water and changes in the physicochemical indices of water and sediment, and in microbiota structure were subsequently investigated. Alternately spraying of calcium peroxide and EM bacteria improved the water quality, especially in terms of the dissolved oxygen and transparency of water body, and could further reduce the levels of total nitrogen, total phosphorus, and ammonia nitrogen. At the same time, the microbiota structure of the water body was significantly changed by spraying with calcium peroxide and EM bacteria, and the relative abundances of Pseudanabaena, Legionellaceae, Planktothrix, Planctomyces, Phenylobacterium, Rhodobacter, Rhodoferax, and Aquirestis were significantly increased. However, there was no significant effect on the physicochemical indexes and microbiota composition of the sediment. CONCLUSIONS The water quality of the Baiyangdian trench could be significantly restored by regular sprinkling of calcium peroxide and EM bacteria. SIGNIFICANCE AND IMPACT OF STUDY The results provide an effective technical method for the restoration of trench wetland water.
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Affiliation(s)
- Zhifei Li
- Key Laboratory of Tropical and Subtropical Fishery Resource Application and Cultivation, Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, 510380, China.,Guangdong Ecological Remediation of Aquaculture Pollution Research Center, Guangzhou, 510380, China.,School of Civil Engineering & Transportation, South China University of Technology, Guangzhou, 510641, China
| | - Yang Liu
- Key Laboratory of Tropical and Subtropical Fishery Resource Application and Cultivation, Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, 510380, China
| | - Jun Xie
- Key Laboratory of Tropical and Subtropical Fishery Resource Application and Cultivation, Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, 510380, China.,Guangdong Ecological Remediation of Aquaculture Pollution Research Center, Guangzhou, 510380, China
| | - Guangjun Wang
- Key Laboratory of Tropical and Subtropical Fishery Resource Application and Cultivation, Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, 510380, China.,Guangdong Ecological Remediation of Aquaculture Pollution Research Center, Guangzhou, 510380, China
| | - Xiangju Cheng
- School of Civil Engineering & Transportation, South China University of Technology, Guangzhou, 510641, China
| | - Junwang Zhang
- Key Laboratory of Tropical and Subtropical Fishery Resource Application and Cultivation, Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, 510380, China
| | - Chaojiong Sang
- Key Laboratory of Tropical and Subtropical Fishery Resource Application and Cultivation, Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, 510380, China
| | - Zhijun Liu
- Key Laboratory of Tropical and Subtropical Fishery Resource Application and Cultivation, Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, 510380, China
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