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Wang B, Lan X, Zhang H, Hu Y. Benthic biofilms in riverine systems: A sink for microplastics and the underlying influences. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2023; 337:122607. [PMID: 37757935 DOI: 10.1016/j.envpol.2023.122607] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/29/2023] [Revised: 09/02/2023] [Accepted: 09/22/2023] [Indexed: 09/29/2023]
Abstract
Rivers are known as major pathways for transporting microplastics from terrestrial areas to the marine environment. However, the behavior of microplastics in terms of retention and transport within riverine systems remains unclear. While considerable efforts have been made to investigate the water column and sediment, limited attention has been given to understanding the interplay between microplastics and benthic biofilms. Therefore, this study aimed to examine the distribution of biofilm-trapped microplastics along the CaoE River and identify the factors influencing the immobilization of microplastics by benthic biofilms. The findings of this study revealed that benthic biofilms served as a sink of microplastics in the CaoE River, with an average abundance of 575 items/m2 in tributaries and 894 items/m2 in the main stream. The dominant shape of microplastics was fiber, while the primary polymer type was polyethylene terephthalate. The distribution of microplastics exhibited significant spatial heterogeneity, as indicated by their abundance and characteristics. In order to reveal the intriguing phenomenon, variations of influencing factors were estimated, including physicochemical characteristics of water, extracellular polymeric substances of benthic biofilms, and microbial communities of benthic biofilms. A partial least squares path modeling analysis was performed using these variables, revealing that water velocity and microbial diversity of benthic biofilms were the key factors influencing the interaction between microplastics and benthic biofilms. In summary, this study provides substantial evidence confirming the crucial role of benthic biofilms in the immobilization of microplastics, which expands concerns about microplastic pollution in the riverine systems. Furthermore, uncovering the underlying influences of microplastic-biofilm interactions will facilitate the development of effective strategies for the control and management of microplastic pollution.
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Affiliation(s)
- Binliang Wang
- School of Life and Environmental Sciences, Shaoxing University, Shaoxing, Zhejiang, 312000, PR China; School of Life Science, Shanxi University, Taiyuan, Shanxi, 030006, PR China
| | - Xuan Lan
- School of Life and Environmental Sciences, Shaoxing University, Shaoxing, Zhejiang, 312000, PR China
| | - He Zhang
- National and Local Joint Engineering Research Center of Ecological Treatment Technology for Urban Water Pollution, Zhejiang Provincial Key Lab for Subtropical Water Environment and Marine Biological Resources Protection, College of Life and Environmental Science, Wenzhou University, Wenzhou, Zhejiang, 325035, PR China
| | - Yiwei Hu
- School of Life and Environmental Sciences, Shaoxing University, Shaoxing, Zhejiang, 312000, PR China; National and Local Joint Engineering Research Center of Ecological Treatment Technology for Urban Water Pollution, Zhejiang Provincial Key Lab for Subtropical Water Environment and Marine Biological Resources Protection, College of Life and Environmental Science, Wenzhou University, Wenzhou, Zhejiang, 325035, PR China.
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2
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Ding J, Meng Y, Lu S, Peng Y, Yan W, Li W, Hu J, Ye T, Zhong Y, Zhang H. The Treatment of Aquaculture Wastewater with Biological Aerated Filters: From the Treatment Process to the Microbial Mechanism. TOXICS 2023; 11:478. [PMID: 37368579 DOI: 10.3390/toxics11060478] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/03/2023] [Revised: 05/13/2023] [Accepted: 05/23/2023] [Indexed: 06/29/2023]
Abstract
Algal cell proliferation has posed significant problems for traditional water treatment facilities; these problems are attributed to surface hydrophilicity and electrostatic repulsion. Biological aerated filters (BAFs) have been extensively used in wastewater treatment to remove pollutants such as algal cells by utilizing the adsorption and separation capabilities of the filter media. In this study, a BAF was supplemented with biological filter medium (Marchantia polymorpha) to assess its effectiveness of pretreating aquaculture wastewater. In terms of process performance, steady and consistent treatment was achieved by the BAF with M. polymorpha (BAF2) under an algal cell density as high as 1.65 × 108 cell/L, with average removal rates for NH4+-N and algae cells of 74.4% and 81.9%, respectively. The photosynthetic activity parameters (rETRmax, α, Fv/Fm, and Ik) of the influent and effluent were quantitatively assessed, and M. polymorpha was found to remove algae by disrupting the photosynthetic system of the algal cells. Furthermore, the addition of the M. polymorpha filter medium enhanced the community structure of the functional microbes in the BAF system. The highest microbial community richness and diversity were observed in the BAF2. Meanwhile, M. polymorpha promoted an increase in the abundance of denitrifying bacteria, including Bdellovibrio and Pseudomonas. Overall, this work offers a unique perspective on the aquaculture wastewater pretreatment process and BAF design.
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Affiliation(s)
- Jiafeng Ding
- School of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou 311121, China
- School of Engineering, Hangzhou Normal University, Hangzhou 311121, China
| | - Yunjuan Meng
- School of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou 311121, China
| | - Shihuan Lu
- School of Engineering, Hangzhou Normal University, Hangzhou 311121, China
| | - Yiwen Peng
- Zhe Jiang Sunda Public Environmental Protection Co., Ltd., Hangzhou 311000, China
| | - Wen Yan
- School of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou 311121, China
| | - Wenbing Li
- School of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou 311121, China
| | - Jinchun Hu
- Quzhou Aquatic Technology Extension Station, Quzhou 324000, China
| | - Ting Ye
- Quzhou Aquatic Technology Extension Station, Quzhou 324000, China
| | - Yuchi Zhong
- School of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou 311121, China
| | - Hangjun Zhang
- School of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou 311121, China
- School of Engineering, Hangzhou Normal University, Hangzhou 311121, China
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3
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Liu F, Qin L, Zhu S, Chen H, Al-Haimi AANM, Xu J, Zhou W, Wang Z. Applications-oriented algicidal efficacy research and in-depth mechanism of a novel strain Brevibacillus sp. on Microcystis aeruginosa. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2023; 330:121812. [PMID: 37178955 DOI: 10.1016/j.envpol.2023.121812] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Revised: 04/04/2023] [Accepted: 05/11/2023] [Indexed: 05/15/2023]
Abstract
The utilization of algicidal bacteria for the control of harmful algal blooms (HABs) is a promising technology for ecological remediation. In our most recent publication, a novel strain of Brevibacillus sp. was isolated and proved to have significant algicidal activity and stability against Microcystis aeruginosa. In order to verify the algicidal effect of the strain in the practical application scenario, the algicidal efficacy of Brevibacillus sp. under conditions close to water in the environment was investigated. Results indicated that the algicidal threshold of Brevibacillus sp. culture was 3‰ inoculation concentration, and the removal rate of M. aeruginosa reached 100%. The process of Chl-a degradation followed a first-order kinetic model, which could be used to predict the degradation effect of M. aeruginosa in practical applications. Additionally, the inoculation of Brevibacillus sp. culture introduced additional nutrients, some of which remained in the water. Furthermore, the algicidal substances demonstrated good sustainability, with a removal rate of up to 78.53% at 144 h after three repeated uses. At 12 h, the algicidal substances caused a 78.65% increase in malondialdehyde (MDA) content in M. aeruginosa compared to the control group, thereby triggering the antioxidant system of M. aeruginosa. Moreover, algal cell fragments were observed to aggregate. This study provides a promising direction for treating cyanobacterial blooms using algicidal bacteria in practical applications.
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Affiliation(s)
- Fen Liu
- Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou, 510640, PR China; CAS Key Laboratory of Renewable Energy, Guangzhou, 510640, PR China; Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development, Guangzhou, 510640, PR China; University of Chinese Academy of Sciences, Beijing, 100049, PR China
| | - Lei Qin
- Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou, 510640, PR China; CAS Key Laboratory of Renewable Energy, Guangzhou, 510640, PR China; Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development, Guangzhou, 510640, PR China
| | - Shunni Zhu
- Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou, 510640, PR China; CAS Key Laboratory of Renewable Energy, Guangzhou, 510640, PR China; Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development, Guangzhou, 510640, PR China
| | - Huanjun Chen
- Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou, 510640, PR China; CAS Key Laboratory of Renewable Energy, Guangzhou, 510640, PR China; Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development, Guangzhou, 510640, PR China
| | - Akram Ali Nasser Mansoor Al-Haimi
- Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou, 510640, PR China; CAS Key Laboratory of Renewable Energy, Guangzhou, 510640, PR China; Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development, Guangzhou, 510640, PR China
| | - Jin Xu
- Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou, 510640, PR China; CAS Key Laboratory of Renewable Energy, Guangzhou, 510640, PR China; Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development, Guangzhou, 510640, PR China
| | - Weizheng Zhou
- Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou, 510640, PR China; CAS Key Laboratory of Renewable Energy, Guangzhou, 510640, PR China; Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development, Guangzhou, 510640, PR China
| | - Zhongming Wang
- Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou, 510640, PR China; CAS Key Laboratory of Renewable Energy, Guangzhou, 510640, PR China; Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development, Guangzhou, 510640, PR China.
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4
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Shao M, Liu L, Liu B, Zheng H, Meng W, Liu Y, Zhang X, Ma X, Sun C, Luo X, Li F, Xing B. Hormetic Effect of Pyroligneous Acids on Conjugative Transfer of Plasmid-mediated Multi-antibiotic Resistance Genes within Bacterial Genus. ACS ENVIRONMENTAL AU 2023; 3:105-120. [PMID: 37102089 PMCID: PMC10125354 DOI: 10.1021/acsenvironau.2c00056] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/17/2022] [Revised: 12/12/2022] [Accepted: 12/13/2022] [Indexed: 04/28/2023]
Abstract
Spread of antibiotic resistance genes (ARGs) by conjugation poses great challenges to public health. Application of pyroligneous acids (PA) as soil amendments has been evidenced as a practical strategy to remediate pollution of ARGs in soils. However, little is known about PA effects on horizontal gene transfer (HGT) of ARGs by conjugation. This study investigated the effects of a woody waste-derived PA prepared at 450°C and its three distillation components (F1, F2, and F3) at different temperatures (98, 130, and 220°C) on conjugative transfer of plasmid RP4 within Escherichia coli. PA at relatively high amount (40-100 μL) in a 30-mL mating system inhibited conjugation by 74-85%, following an order of PA > F3 ≈ F2 ≈ F1, proving the hypothesis that PA amendments may mitigate soil ARG pollution by inhibiting HGT. The bacteriostasis caused by antibacterial components of PA, including acids, phenols, and alcohols, as well as its acidity (pH 2.81) contributed to the inhibited conjugation. However, a relatively low amount (10-20 μL) of PA in the same mating system enhanced ARG transfer by 26-47%, following an order of PA > F3 ≈ F2 > F1. The opposite effect at low amount is mainly attributed to the increased intracellular reactive oxygen species production, enhanced cell membrane permeability, increased extracellular polymeric substance contents, and reduced cell surface charge. Our findings highlight the hormesis (low-amount promotion and high-amount inhibition) of PA amendments on ARG conjugation and provide evidence for selecting an appropriate amount of PA amendment to control the dissemination of soil ARGs. Moreover, the promoted conjugation also triggers questions regarding the potential risks of soil amendments (e.g., PA) in the spread of ARGs via HGT.
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Affiliation(s)
- Mengying Shao
- Institute
of Coastal Environmental Pollution Control, Ministry of Education
Key Laboratory of Marine Environment and Ecology, College of Environmental
Science and Engineering, Frontiers Science Center for Deep Ocean Multispheres
and Earth System, Ocean University of China, Qingdao 266100, China
- Marine
Ecology and Environmental Science Laboratory, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266071, China
| | - Liuqingqing Liu
- Institute
of Coastal Environmental Pollution Control, Ministry of Education
Key Laboratory of Marine Environment and Ecology, College of Environmental
Science and Engineering, Frontiers Science Center for Deep Ocean Multispheres
and Earth System, Ocean University of China, Qingdao 266100, China
- Marine
Ecology and Environmental Science Laboratory, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266071, China
| | - Bingjie Liu
- Institute
of Coastal Environmental Pollution Control, Ministry of Education
Key Laboratory of Marine Environment and Ecology, College of Environmental
Science and Engineering, Frontiers Science Center for Deep Ocean Multispheres
and Earth System, Ocean University of China, Qingdao 266100, China
- Ministry
of Ecology and Environment, South China
Institute of Environmental Sciences, Guangzhou 510535, China
| | - Hao Zheng
- Institute
of Coastal Environmental Pollution Control, Ministry of Education
Key Laboratory of Marine Environment and Ecology, College of Environmental
Science and Engineering, Frontiers Science Center for Deep Ocean Multispheres
and Earth System, Ocean University of China, Qingdao 266100, China
- Marine
Ecology and Environmental Science Laboratory, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266071, China
- Sanya
Oceanographic Institution, Ocean University
of China, Sanya 572000, China
| | - Wei Meng
- Institute
of Coastal Environmental Pollution Control, Ministry of Education
Key Laboratory of Marine Environment and Ecology, College of Environmental
Science and Engineering, Frontiers Science Center for Deep Ocean Multispheres
and Earth System, Ocean University of China, Qingdao 266100, China
| | - Yifan Liu
- Institute
of Coastal Environmental Pollution Control, Ministry of Education
Key Laboratory of Marine Environment and Ecology, College of Environmental
Science and Engineering, Frontiers Science Center for Deep Ocean Multispheres
and Earth System, Ocean University of China, Qingdao 266100, China
| | - Xiao Zhang
- Institute
of Coastal Environmental Pollution Control, Ministry of Education
Key Laboratory of Marine Environment and Ecology, College of Environmental
Science and Engineering, Frontiers Science Center for Deep Ocean Multispheres
and Earth System, Ocean University of China, Qingdao 266100, China
| | - Xiaohan Ma
- Institute
of Coastal Environmental Pollution Control, Ministry of Education
Key Laboratory of Marine Environment and Ecology, College of Environmental
Science and Engineering, Frontiers Science Center for Deep Ocean Multispheres
and Earth System, Ocean University of China, Qingdao 266100, China
- Marine
Ecology and Environmental Science Laboratory, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266071, China
| | - Cuizhu Sun
- Institute
of Coastal Environmental Pollution Control, Ministry of Education
Key Laboratory of Marine Environment and Ecology, College of Environmental
Science and Engineering, Frontiers Science Center for Deep Ocean Multispheres
and Earth System, Ocean University of China, Qingdao 266100, China
- Marine
Ecology and Environmental Science Laboratory, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266071, China
| | - Xianxiang Luo
- Institute
of Coastal Environmental Pollution Control, Ministry of Education
Key Laboratory of Marine Environment and Ecology, College of Environmental
Science and Engineering, Frontiers Science Center for Deep Ocean Multispheres
and Earth System, Ocean University of China, Qingdao 266100, China
- Marine
Ecology and Environmental Science Laboratory, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266071, China
- Sanya
Oceanographic Institution, Ocean University
of China, Sanya 572000, China
| | - Fengmin Li
- Institute
of Coastal Environmental Pollution Control, Ministry of Education
Key Laboratory of Marine Environment and Ecology, College of Environmental
Science and Engineering, Frontiers Science Center for Deep Ocean Multispheres
and Earth System, Ocean University of China, Qingdao 266100, China
- Marine
Ecology and Environmental Science Laboratory, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266071, China
- Sanya
Oceanographic Institution, Ocean University
of China, Sanya 572000, China
| | - Baoshan Xing
- Stockbridge
School of Agriculture, University of Massachusetts, Amherst, Massachusetts 01003, United States
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5
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Lu S, Li X, Yu B, Ding J, Zhong Y, Zhang H. Efficient Microcystis aeruginosa coagulation and removal by palladium clusters doped g-C 3N 4 with no light irradiation. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2022; 246:114148. [PMID: 36194938 DOI: 10.1016/j.ecoenv.2022.114148] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/24/2022] [Revised: 09/07/2022] [Accepted: 09/29/2022] [Indexed: 06/16/2023]
Abstract
Efficient treatment of cyanobacterial blooms in eutrophication waters by safe and reliable nanomaterials is a big challenge for reducing environmental health risks. Herein, a novel strategy combining palladium clusters (Pdn) with g-C3N4 nanocomposite was presented to achieve high-efficient removal of Microcystis aeruginosa cells through coagulation and breakage. Interestingly, 95.17% of algal cells (initial concentration of 5.6 × 106 cells mL-1) were promptly removed in the Pd/g-C3N4 (5%) system within only 10 min and without visible light irradiation and persulfate activation. Both the release of potassium ion and microcystin during the removal process and the transmission electron microscope observations of Microcystis aeruginosa cells proved that the integrity of the algal cell membrane was destroyed. The removal of Microcystin-LR (MC-LR) were further confirmed in the next process. Pd metal interaction and breakage against algal cells may cause disruption of algal cells. This study describes a novel technology for the superfast removal of harmful algae and may provide a new insight into the control of cyanobacterial blooms in practical applications.
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Affiliation(s)
- Shihuan Lu
- School of Life and Environmental Sciences, Hangzhou Normal University, 310018 Hangzhou, Zhejiang, China
| | - Xizi Li
- School of Life and Environmental Sciences, Hangzhou Normal University, 310018 Hangzhou, Zhejiang, China
| | - Bingzhi Yu
- School of Life and Environmental Sciences, Hangzhou Normal University, 310018 Hangzhou, Zhejiang, China
| | - Jiafeng Ding
- School of Life and Environmental Sciences, Hangzhou Normal University, 310018 Hangzhou, Zhejiang, China.
| | - Yuchi Zhong
- School of Life and Environmental Sciences, Hangzhou Normal University, 310018 Hangzhou, Zhejiang, China
| | - Hangjun Zhang
- School of Life and Environmental Sciences, Hangzhou Normal University, 310018 Hangzhou, Zhejiang, China.
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6
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Huang J, Xu M, Zhang W, Mao L. A novel algicidal bacteria isolated from native snail lived in Taihu Lake against algal blooms: identification, degradation kinetic, and algicidal mechanism. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:83921-83930. [PMID: 35776301 DOI: 10.1007/s11356-022-21666-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/08/2021] [Accepted: 06/21/2022] [Indexed: 06/15/2023]
Abstract
Harmful algal blooms (HABs) impacted negatively the water ecosystem, and produced toxic microcystins that poses toxic effect on liver, nervous, and genital system. The introduction of useful and adaptive algae-degrading microbes or bio-augmentation can be regarded as an efficient way to inhibit the outbreak of HABs. The purpose of this study is to evaluate the application potential of algicidal bacteria named XMC, which is isolated from native snails. Response surface methodology (RSM) experiments showed that self-characteristic and various external conditions affected the actual algae inhibition ability of XMC. In particular, actual algicidal efficiency was strongly depend on the temperature and growth stage of XMC, and the maximum algicidal rate could reach 93.95% within 7 days. The degradation curve of Microcystis aeruginosa was compliant with the first-order kinetic model, which could be used to predict the degradation effect of Microcystis aeruginosa in engineering applications. The analysis results of algae dissolution products showed that algicidal bacteria XMC had both direct and indirect algicidal capacity. In addition, XMC had strong algicidal ability and greater environmental adaptability, and its algae dissolution products were environmentally friendly. All results indicated that XMC had the potential to be used in the bio-degradation of cyanobacteria bloom.
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Affiliation(s)
- Jinjie Huang
- School of Environmental and Safety Engineering, Changzhou University, Changzhou, 213164, Jiangsu Province, China
| | - Mingchen Xu
- School of Environmental and Safety Engineering, Changzhou University, Changzhou, 213164, Jiangsu Province, China
| | - Wenyi Zhang
- School of Environmental and Safety Engineering, Changzhou University, Changzhou, 213164, Jiangsu Province, China
| | - Linqiang Mao
- School of Environmental and Safety Engineering, Changzhou University, Changzhou, 213164, Jiangsu Province, China.
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7
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Mao L, Huang J, Mao H, Xu M, Zhang W. Self-floating capsule of algicidal bacteria Bacillus sp. HL and its performance in the dissolution of Microcystis aeruginosa. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2022; 320:115837. [PMID: 35933879 DOI: 10.1016/j.jenvman.2022.115837] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/14/2022] [Revised: 07/20/2022] [Accepted: 07/20/2022] [Indexed: 06/15/2023]
Abstract
Algicidal bacteria is considered as an efficient and environmentally friendly approach to suppress Microcystis aeruginosa (M. aeruginosa). However, algicidal bacteria in natural water is limited during the practical application due to the interference of external factors and the low reuse capability. In this study, a bio-degradation capsule for M. aeruginosa is prepared by bio-compatible sodium alginate (SA) compositing with eco-friendly ethyl cellulose (EC) to improve the property and reuse capability of algicidal bacteria. Bacterial strain HL was well immobilized and the capsule was obtained with 2% of SA, 3% of calcium chloride (CaCl2) and 3% of EC. It has been proved that capsules immobilizing bacteria HL shows considerable advantage over traditional bio-treatment systems (free-living bacteria) and good reusable performance. A better algicidal rate of 77.67% ± 1.14% at 7th day was obtained with the use of capsule embedding 50 mL of algicidal bacteria, enhanced by 11.05% comparing with same amount of free-living bacteria. Moreover, the algicidal rate of M. aeruginosa still reached 68.57% ± 2.88% after three times repetitive use. The effect of capsules on the fluorescence and antioxidant system of M. aeruginosa indicated that the photosystems were irreversibly damaged and the antioxidant response of superoxide dismutase (SOD), peroxidase (POD) and catalase (CAT) were significantly induced. Overall, capsules prepared in this study can provide a desirable environment for algicidal bacteria HL and ensure algicidal bacteria to in-situ work well in inhibiting booms of algae.
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Affiliation(s)
- Linqiang Mao
- School of Environmental and Safety Engineering, Changzhou University, Changzhou, Jiangsu Province, 213164, China.
| | - Jinjie Huang
- School of Environmental and Safety Engineering, Changzhou University, Changzhou, Jiangsu Province, 213164, China
| | - Hongyan Mao
- Shandong Vocational Animal Science and Veterinary College, Weifang, Shandong Province, 261061, China
| | - Mingchen Xu
- School of Environmental and Safety Engineering, Changzhou University, Changzhou, Jiangsu Province, 213164, China
| | - Wenyi Zhang
- School of Environmental and Safety Engineering, Changzhou University, Changzhou, Jiangsu Province, 213164, China.
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8
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Ren B, Weitzel KA, Duan X, Nadagouda MN, Dionysiou DD. A comprehensive review on algae removal and control by coagulation-based processes: mechanism, material, and application. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2022.121106] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
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9
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Kim HS, Park YH, Nam K, Kim S, Choi YE. Amination of cotton fiber using polyethyleneimine and its application as an adsorbent to directly remove a harmful cyanobacterial species, Microcystis aeruginosa, from an aqueous medium. ENVIRONMENTAL RESEARCH 2021; 197:111235. [PMID: 33933491 DOI: 10.1016/j.envres.2021.111235] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/30/2020] [Revised: 04/19/2021] [Accepted: 04/23/2021] [Indexed: 06/12/2023]
Abstract
In the present study, we applied an adsorption-based strategy for the removal of a harmful cyanobacterial species, Microcystis aeruginosa, using cotton fiber. Considering the negatively charged surface properties of M. aeruginosa cells in aqueous phases, aminated cotton fibers were prepared through polyethyleneimine (PEI) modification on the pristine cotton fibers. The aminated surface properties of PEI-modified cotton fiber (PEI-cotton) were confirmed by Fourier transform infrared spectroscopy (FT-IR), X-ray photoelectron spectroscopy (XPS), and potentiometric titration analyses. The pristine cotton fiber could not remove the M. aeruginosa cells, but the PEI-cotton could efficiently remove 98.7% of M. aeruginosa cells from the aqueous medium. In addition, removed cells could be observed on the sorbent surface by field emission scanning electron microscopy (FE-SEM) analysis. PEI-cotton fabricated in 3% PEI solution could remove M. aeruginosa cells (97.9%) more efficiently compared to that fabricated in 1% (82.1%) and 2% (86.2%) of PEI solutions. From the toxicity assessment of the PEI-cotton using Daphnia magna, negligible toxicity of PEI-cotton was confirmed. Our results indicate that the application of PEI-cotton fibers for the removal of M. aeruginosa cells could be suggested as a feasible, effective, and eco-friendly method of harmful algal bloom (HAB) control in water resources.
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Affiliation(s)
- Ho Seon Kim
- Division of Environmental Science & Ecological Engineering, Korea University, Seoul, 02841, Republic of Korea
| | - Yun Hwan Park
- Division of Environmental Science & Ecological Engineering, Korea University, Seoul, 02841, Republic of Korea
| | - Kwiwoong Nam
- Division of Environmental Science & Ecological Engineering, Korea University, Seoul, 02841, Republic of Korea
| | - Sok Kim
- Division of Environmental Science & Ecological Engineering, Korea University, Seoul, 02841, Republic of Korea; OJeong Eco-Resilience Institute, Korea University, Seoul, 02841, Republic of Korea.
| | - Yoon-E Choi
- Division of Environmental Science & Ecological Engineering, Korea University, Seoul, 02841, Republic of Korea.
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