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Zhang P, Zhu S, Xiong C, Yan B, Wang Z, Li K, Olivier I, Wang H. Flocculation of Chlorella vulgaris-induced algal blooms: critical conditions and mechanisms. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:78809-78820. [PMID: 35699884 DOI: 10.1007/s11356-022-21383-8] [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: 12/10/2021] [Accepted: 06/06/2022] [Indexed: 06/15/2023]
Abstract
Algal blooms have posed great threats to livestocks and human health. Although flocculation is effective, its efficiency may hinder the direct application for algal blooms. In this study, critical (optimal) conditions and mechanisms for AlCl3, FeCl3, poly-aluminum chloride (PAC), chitosan, and polydimethyldiallylammonium chloride (PDADMAC)-induced flocculation of Chlorella vulgaris (C. vulgaris) were studied. Results identified the critical conditions which can cause flocculation efficiencies over 90% in 45 min for the five flocculants. Specifically, 4~10-mg/L doses of PDADMAC were proved to be appropriate for the treatment of C. vulgaris-induced algal blooms at pH 6.0~12.0. To probe the underlying mechanisms, functional groups involved in flocculation, zeta potential, and species distribution were analyzed during flocculation. FT-IR results indicated that N-H stretching in amine and C-H deformation in aliphatics were involved in algal flocculation with FeCl3, and C-H deformation played an important role with PDADMAC, PAC, and chitosan. For AlCl3, zeta potential and species distribution results suggested that charge neutralization and adsorption bridging were responsible for algal flocculation at pH 6~8. However, adsorption bridging and sweeping effects were the main mechanisms at pH >3 for FeCl3. The flocculation mechanisms for the rest of the three polymers were charge neutralization, adsorption bridging, and sweeping. Meanwhile, all the flocculation processes followed second-order kinetics. Strong linkages were found between the rate constant, fractal dimension, and flocculation efficiency (P < 0.05). The results of critical flocculation conditions and mechanisms indicated that PDADMAC was an excellent flocculant for C. vulgaris removing and recycling, especially in water bloom treatment.
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Affiliation(s)
- Ping Zhang
- College of Eco-Environmental Engineering, Guizhou Minzu University, Guiyang, 550025, China
| | - Sihan Zhu
- College of Eco-Environmental Engineering, Guizhou Minzu University, Guiyang, 550025, China
| | - Chao Xiong
- College of Eco-Environmental Engineering, Guizhou Minzu University, Guiyang, 550025, China
| | - Bin Yan
- College of Environmental and Chemical Engineering, Chongqing Three Gorges University, Chongqing, 404020, China
| | - Zhikang Wang
- College of Eco-Environmental Engineering, Guizhou Minzu University, Guiyang, 550025, China.
| | - Kai Li
- College of Eco-Environmental Engineering, Guizhou Minzu University, Guiyang, 550025, China
| | - Irumva Olivier
- College of Eco-Environmental Engineering, Guizhou Minzu University, Guiyang, 550025, China
- University of Rwanda, College of Science and Technology, P.O. Box 3900, Kigali, Rwanda
| | - Han Wang
- College of Eco-Environmental Engineering, Guizhou Minzu University, Guiyang, 550025, China
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Hu Y, Sampata AM, Ruiz-Mercado GJ, Zavala VM. Logistics Network Management of Livestock Waste for Spatiotemporal Control of Nutrient Pollution in Water Bodies. ACS SUSTAINABLE CHEMISTRY & ENGINEERING 2019; 7:18359-18374. [PMID: 32983653 PMCID: PMC7511004 DOI: 10.1021/acssuschemeng.9b03920] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Nutrient pollution is a widespread water quality problem, which originates from excess nutrient runoff from agricultural land, improperly managed farming operations, and point sources such as wastewater treatment plants. Some nutrient pollution impacts include harmful algal blooms (HABs), hypoxia, and eutrophication. HABs are major environmental events that cause severe health threats and economic losses (e.g., tourism, real estate, commercial fishing). A dimension of the nutrient pollution problem that has not received much attention is that this interacts with organic waste management practices. As a result, it is important to connect the time and location of point and nonpoint nutrient source releases, nutrient soil content, spatial layout, and hydrology of agricultural lands with the transport of nutrients to water bodies and their impacts on aquatic ecosystems. In this work, we show how nutrient concentration in water bodies and other spatiotemporal factors are related to HAB development and how logistics management of livestock waste can be used to conduct space-time management of nutrient pollution. A case study for the Upper Yahara Watershed in the State of Wisconsin (U.S.) is employed to demonstrate the practicability of the modeling framework. Our framework reveals that logistics network management for waste and nutrients can reduce the incidence rates of HABs, but reducing it to nonharmful levels would require long-term efforts such as installing nutrient recovery technologies, coordinating manure storage and application, and deploying management incentive plans.
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Affiliation(s)
- Yicheng Hu
- Department of Chemical and Biological Engineering, University of Wisconsin-Madison, 1415 Engineering Drive, Madison, Wisconsin 53706, United States
| | - Apoorva M. Sampata
- Department of Chemical and Biological Engineering, University of Wisconsin-Madison, 1415 Engineering Drive, Madison, Wisconsin 53706, United States
| | - Gerardo J. Ruiz-Mercado
- Office of Research and Development, U.S. Environmental Protection Agency, 26 West Martin Luther King Drive, Cincinnati, Ohio 45268, United States
| | - Victor M. Zavala
- Department of Chemical and Biological Engineering, University of Wisconsin-Madison, 1415 Engineering Drive, Madison, Wisconsin 53706, United States
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3
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Zhang H, Zhao Y, Yin H, Wang Y, Li H, Wang Z, Geng Y, Liang W, Wang H. Effect of aquatic macrophyte growth on landscape water quality improvement. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2019; 26:33791-33803. [PMID: 29881960 DOI: 10.1007/s11356-018-2421-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/07/2018] [Accepted: 05/25/2018] [Indexed: 06/08/2023]
Abstract
The water of urban landscape park is often confronted with microalgal blooms due to its stagnancy. Bioremediation using the combined emergent and submerged plants to control the microalgae growth was investigated in the present study. Two water bodies (Bei and Xin) of Yuyuantan Park in Beijing were selected for the field experiments, and the other lakes with different vegetation of macrophytes were selected as the comparison. The concentrations of chlorophyll a (chl a), chemical oxygen demand (COD), total nitrogen (TN), and total phosphorus (TP), and water temperature and transparency were monitored before and after bioremediation from 2015 to 2017. Results showed that the effects of microalgal inhibition were more significant 2 years after bioremediation. Specifically, the chl a of Dong Lake without any vegetation of macrophytes was up to 65.1 μg/L in summer of 2017, while the Bei and Xin Lakes was only 6.2 and 11.3 μg/L, respectively. In addition, the water quality and transparency also improved, with water bodies being crystal clear. Submerged plants played major roles in microalgal control and water quality improvement, compared to the lakes with only emergent plants. The intensity of humic acid-like substances in three-dimensional fluorescent spectra was stronger for the lakes with submerged plants.
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Affiliation(s)
- Hengfeng Zhang
- College of Environmental Science and Engineering, Beijing Forestry University, 35# Qinghua East Rd., Haidian District, Beijing, China
| | - Yixi Zhao
- College of Environmental Science and Engineering, Beijing Forestry University, 35# Qinghua East Rd., Haidian District, Beijing, China
| | - Hang Yin
- School of Landscape Architecture, Beijing Forestry University, Beijing, China
| | - Yuanyuan Wang
- College of Environmental Science and Engineering, Beijing Forestry University, 35# Qinghua East Rd., Haidian District, Beijing, China
| | - Huixian Li
- College of Environmental Science and Engineering, Beijing Forestry University, 35# Qinghua East Rd., Haidian District, Beijing, China
| | - Zhanshen Wang
- Yuyuantan Park Management Department of Beijing, Beijing, China
| | - Yongbo Geng
- Yuyuantan Park Management Department of Beijing, Beijing, China
| | - Wenyan Liang
- College of Environmental Science and Engineering, Beijing Forestry University, 35# Qinghua East Rd., Haidian District, Beijing, China.
| | - Hongjie Wang
- College of Environmental Science and Engineering, Beijing Forestry University, 35# Qinghua East Rd., Haidian District, Beijing, China.
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Wu L, Zhu Q, Yang L, Li B, Hu C, Lan S. Nutrient transferring from wastewater to desert through artificial cultivation of desert cyanobacteria. BIORESOURCE TECHNOLOGY 2018; 247:947-953. [PMID: 30060434 DOI: 10.1016/j.biortech.2017.09.127] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/14/2017] [Revised: 09/16/2017] [Accepted: 09/18/2017] [Indexed: 06/08/2023]
Abstract
Realizing the reasonable allocation of resources is possible to solve the dual problems of resources and environment. Therefore, in this study desert cyanobacterium Scytonema javanicum was cultivated in artificial synthetic wastewater to explore the feasibility of nutrient transferring from wastewater to desert. After inoculation, S. javanicum grew well in the wastewater; nitrogen and phosphorus were gradually removed from the wastewater. In general, cyanobacterial biomass, exopolysaccharide content, COD, nitrogen and phosphorus contents were all significantly affected by the cultivation time, wastewater dilution treatment and their interaction (P<0.001). Comprehensively considering the producing period, biomass accumulation and nutrient removal efficiency, cultivation time of cyanobacterium S. javanicum in the synthetic wastewater should be controlled around 20days, with wastewater dilution ratio at 1:1. Conclusively, desert cyanobacterium S. javanicum is a promising species for nutrient transferring from wastewater to desert, and its maximum biomass yield could reach 3.91mgChl-aL-1 in the synthetic wastewater.
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Affiliation(s)
- Li Wu
- School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan 430070, China
| | - Qiuheng Zhu
- School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan 430070, China
| | - Lie Yang
- School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan 430070, China
| | - Bolin Li
- School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan 430070, China
| | - Chunxiang Hu
- Key Laboratory of Algal Biology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China
| | - Shubin Lan
- Key Laboratory of Algal Biology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China.
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Dai G, Peng N, Zhong J, Yang P, Zou B, Chen H, Lou Q, Fang Y, Zhang W. Effect of metals on microcystin abundance and environmental fate. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2017; 226:154-162. [PMID: 28431314 DOI: 10.1016/j.envpol.2017.04.013] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/09/2016] [Revised: 03/30/2017] [Accepted: 04/07/2017] [Indexed: 06/07/2023]
Abstract
Metals can react with microcystin (MC), which is released from cyanobacterial blooms through various mechanisms; these reactions may mitigate the environmental and health risks of MCs but may also cause harm to aquatic ecosystems and humans. Several studies were conducted, including laboratory tests, ecological simulations, and a field investigation of Poyang Lake. The laboratory studies showed that Fe3+, Cu2+, and Pb2+ stimulated MC photodegradation under high light intensity at the water-sediment interface, which reduced the MC accumulation in the sediment. In the laboratory studies involving the addition of metal ions to lake sediment containing adsorbed MC, MC biodegradation was inhibited by supplementing with high levels of Fe3+, Cu2+, or Pb2+. Fe3+ and Pb2+ promoted MC accumulation in the hydrophyte Eichhornia crassipes at relatively low concentrations, but this effect decreased with increasing high metal concentrations. An ecological survey in Poyang Lake during the dry season demonstrated that high Fe levels can reduce MC accumulation in the sediment, which could be the result of Fe-mediated photodegradation. The results indicate that metals involved in MC transportation and degradation may play an important role in the environmental fate of MC.
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Affiliation(s)
- Guofei Dai
- Jiangxi Provincial Key Laboratory of Water Resources and Environment of Poyang Lake, Jiangxi Institute of Water Sciences, Nanchang 330029, PR China.
| | - Ningyan Peng
- College of Life Science, Nanchang University, Nanchang 330031, PR China
| | - Jiayou Zhong
- Jiangxi Provincial Key Laboratory of Water Resources and Environment of Poyang Lake, Jiangxi Institute of Water Sciences, Nanchang 330029, PR China.
| | - Ping Yang
- Jiangxi Provincial Key Laboratory of Water Resources and Environment of Poyang Lake, Jiangxi Institute of Water Sciences, Nanchang 330029, PR China
| | - Binchun Zou
- Jiangxi Provincial Key Laboratory of Water Resources and Environment of Poyang Lake, Jiangxi Institute of Water Sciences, Nanchang 330029, PR China
| | - Hui Chen
- Jiangxi Provincial Key Laboratory of Water Resources and Environment of Poyang Lake, Jiangxi Institute of Water Sciences, Nanchang 330029, PR China
| | - Qian Lou
- Jiangxi Provincial Key Laboratory of Water Resources and Environment of Poyang Lake, Jiangxi Institute of Water Sciences, Nanchang 330029, PR China
| | - Yuanyuan Fang
- Jiangxi Provincial Key Laboratory of Water Resources and Environment of Poyang Lake, Jiangxi Institute of Water Sciences, Nanchang 330029, PR China
| | - Wei Zhang
- Jiangxi Provincial Key Laboratory of Water Resources and Environment of Poyang Lake, Jiangxi Institute of Water Sciences, Nanchang 330029, PR China
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Zuo S, Zhou S, Ye L, Ding Y, Jiang X. Antialgal effects of five individual allelochemicals and their mixtures in low level pollution conditions. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2016; 23:15703-15711. [PMID: 27137194 DOI: 10.1007/s11356-016-6770-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/09/2015] [Accepted: 04/26/2016] [Indexed: 06/05/2023]
Abstract
An effective, environmentally friendly, and eco-sustainable approach for removing harmful microalgae is exploiting the allelopathic potential of aquatic macrophytes. In this study, we simulated field pollution conditions in the laboratory to investigate algal inhibition by allelochemicals, thereby providing insights into field practices. We tested five allelochemicals, i.e., coumarin, ρ-hydroxybenzoic acid, protocatechuic acid, stearic acid, and ρ-aminobenzenesulfonic acid, and a typical green alga, Chlorella pyrenoidosa, under two conditions. In the unpolluted treatment, individual allelochemicals had strong algal inhibition effects, where coumarin and ρ-hydroxybenzoic acid had greater potential for algal inhibition than protocatechuic acid, stearic acid, and ρ-aminobenzenesulfonic acid based on the 50 % inhibitory concentration. However, when two or three allelochemicals were mixed in specific proportions, the algal inhibition rate exceeded 80 %, thereby indicating allelopathic synergistic interactions. Mixtures of four or five allelochemicals had weak effects on algal inhibition, which indicated antagonistic interactions. Furthermore, the presence of low lead pollution significantly reduced the antialgal potential of individual allelochemicals, whereas the allelopathic synergistic interactions with mixtures between two or three allelochemicals were changed into antagonistic effects by low pollution. In particular, the allelopathic antagonistic interactions between four or five allelochemicals were increased by pollution. The allelopathic performance of these five allelochemicals may depend on various factors, such as the chemical species, mixture parameters, and algal strain. Thus, we found that low level pollution reduced the allelopathic inhibition of microalgae by allelochemicals. Therefore, the control of algae by the direct addition of allelochemicals should consider various environmental factors.
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Affiliation(s)
- Shengpeng Zuo
- College of Environmental Science and Engineering, Anhui Normal University, 189 South Jiuhua Road, Wuhu, 241003, People's Republic of China.
| | - Shoubiao Zhou
- College of Environmental Science and Engineering, Anhui Normal University, 189 South Jiuhua Road, Wuhu, 241003, People's Republic of China
| | - Liangtao Ye
- College of Environmental Science and Engineering, Anhui Normal University, 189 South Jiuhua Road, Wuhu, 241003, People's Republic of China
| | - Ying Ding
- College of Environmental Science and Engineering, Anhui Normal University, 189 South Jiuhua Road, Wuhu, 241003, People's Republic of China
| | - Xiaofeng Jiang
- College of Environmental Science and Engineering, Anhui Normal University, 189 South Jiuhua Road, Wuhu, 241003, People's Republic of China
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7
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Wang C, Bai L, Jiang HL, Xu H. Algal bloom sedimentation induces variable control of lake eutrophication by phosphorus inactivating agents. THE SCIENCE OF THE TOTAL ENVIRONMENT 2016; 557-558:479-488. [PMID: 27017078 DOI: 10.1016/j.scitotenv.2016.03.082] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/14/2015] [Revised: 03/11/2016] [Accepted: 03/11/2016] [Indexed: 06/05/2023]
Abstract
Lake eutrophication typically occurs with a syndrome of algae breeding and biomass accumulation (e.g., algal blooms). Therefore, the effect of algal bloom sedimentation on eutrophication control by phosphorus (P) inactivating agents was assessed herein. Three commercial products, including aluminum (Al) sulfate, iron (Fe) sulfate, and a lanthanum-modified clay (Phoslock®), as well as one easily available by-product, drinking water treatment residue (DWTR), were selected. The most important finding was that during algae sedimentation, P immobilization from the overlying water by Al, Phoslock®, and DWTR was dominated by a long-term slow phase (>150d), while Fe has limited effectiveness on the immobilization. Further analysis indicated that the algae sedimentation effect was mainly due to the slow release of P from algae, leading to relatively limited P available for the inactivating agents. Then, a more unfavorable effect on the P immobilization capability of inactivating agents was caused by the induced anaerobic conditions, the released organic matter from algae, and the increased sulfide in the overlying water and sediments during sedimentation. Overall, algae sedimentation induced variable control of eutrophication by P inactivating agents. Accordingly, recommendations for future works about algal lake restoration were also proposed.
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Affiliation(s)
- Changhui Wang
- State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China
| | - Leilei Bai
- State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China; Graduate University of Chinese Academy of Sciences, China
| | - He-Long Jiang
- State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China.
| | - Huacheng Xu
- State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China
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8
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Shi W, Bi L, Pan G. Effect of algal flocculation on dissolved organic matters using cationic starch modified soils. J Environ Sci (China) 2016; 45:177-184. [PMID: 27372131 DOI: 10.1016/j.jes.2015.12.018] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2015] [Revised: 12/14/2015] [Accepted: 12/15/2015] [Indexed: 06/06/2023]
Abstract
Modified soils (MSs) are being increasingly used as geo-engineering materials for the sedimentation removal of cyanobacterial blooms. Cationic starch (CS) has been tested as an effective soil modifier, but little is known about its potential impacts on the treated water. This study investigated dissolved organic matters in the bloom water after algal removal using cationic starch modified soils (CS-MSs). Results showed that the dissolved organic carbon (DOC) could be decreased by CS-MS flocculation and the use of higher charge density CS yielded a greater DOC reduction. When CS with the charge density of 0.052, 0.102 and 0.293meq/g were used, DOC was decreased from 3.4 to 3.0, 2.3 and 1.7mg/L, respectively. The excitation-emission matrix fluorescence spectroscopy and UV254 analysis indicated that CS-MS exhibits an ability to remove some soluble organics, which contributed to the DOC reduction. However, the use of low charge density CS posed a potential risk of DOC increase due to the high CS loading for effective algal removal. When CS with the charge density of 0.044meq/g was used, DOC was increased from 3.4 to 3.9mg/L. This study suggested, when CS-MS is used for cyanobacterial bloom removal, the content of dissolved organic matters in the treated water can be controlled by optimizing the charge density of CS. For the settled organic matters, other measures (e.g., capping treatments using oxygen loaded materials) should be jointly applied after algal flocculation.
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Affiliation(s)
- Wenqing Shi
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
| | - Lei Bi
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Gang Pan
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; School of Animal, Rural, and Environmental Sciences, Nottingham Trent University, NG25 0QF, UK.
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Ding H, Wu Y, Zou B, Lou Q, Zhang W, Zhong J, Lu L, Dai G. Simultaneous removal and degradation characteristics of sulfonamide, tetracycline, and quinolone antibiotics by laccase-mediated oxidation coupled with soil adsorption. JOURNAL OF HAZARDOUS MATERIALS 2016; 307:350-358. [PMID: 26826938 DOI: 10.1016/j.jhazmat.2015.12.062] [Citation(s) in RCA: 110] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/09/2015] [Revised: 12/26/2015] [Accepted: 12/30/2015] [Indexed: 06/05/2023]
Abstract
The uses of laccase in the degradation and removal of antibiotics have recently been reported because of the high efficiency and environmental friendliness of laccase. However, these removal studies mostly refer to a limited number of antibiotics. In this study, soil adsorption was introduced into the laccase-oxidation system to assist the simultaneous removal of 14 kinds of sulfonamide, tetracycline, and quinolone antibiotics, which differed in structures and chemical properties. The complementary effects of laccase-mediated oxidation and soil adsorption enabled the simultaneous removal. Removal characteristics were determined by a comprehensive consideration of the separate optimum conditions for laccase oxidation and soil adsorption removal experiments. With concentrations of laccase, syringaldehyde (SA), and soil of 0.5mg/mL, 0.5mmol/L, and 50g/L, respectively, and at pH 6 and 25°C, the removal rates of each antibiotic exceeded 70% in 15min and were close to 100% in 180min. Sulfonamide antibiotics (SAs) were removed mainly by laccase oxidation and quinolone antibiotics (QUs) mainly by soil adsorption. Tetracycline antibiotics (TCs) were removed by both treatments in the coupled system, but laccase oxidation dominated. Electrostatic adsorption was speculated to be one of the adsorption mechanisms in soil adsorption with QUs and TCs.
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Affiliation(s)
- Huijun Ding
- School of Resource and Environmental Science, Wuhan University, Wuhan 430079, People'sRepublic of China; Jiangxi Provincial Key Laboratory of Water Resources and Environment of Poyang Lake, Jiangxi Institute of Water Sciences, Nanchang 330029, People's Republic of China
| | - Yixiao Wu
- School of Resource and Environmental Science, Wuhan University, Wuhan 430079, People'sRepublic of China
| | - Binchun Zou
- Jiangxi Provincial Key Laboratory of Water Resources and Environment of Poyang Lake, Jiangxi Institute of Water Sciences, Nanchang 330029, People's Republic of China
| | - Qian Lou
- Jiangxi Provincial Key Laboratory of Water Resources and Environment of Poyang Lake, Jiangxi Institute of Water Sciences, Nanchang 330029, People's Republic of China
| | - Weihao Zhang
- School of Resource and Environmental Science, Wuhan University, Wuhan 430079, People'sRepublic of China.
| | - Jiayou Zhong
- Jiangxi Provincial Key Laboratory of Water Resources and Environment of Poyang Lake, Jiangxi Institute of Water Sciences, Nanchang 330029, People's Republic of China.
| | - Lei Lu
- School of Resource and Environmental Science, Wuhan University, Wuhan 430079, People'sRepublic of China
| | - Guofei Dai
- Jiangxi Provincial Key Laboratory of Water Resources and Environment of Poyang Lake, Jiangxi Institute of Water Sciences, Nanchang 330029, People's Republic of China
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Liao C, Liu X. Prevent the degradation of algicidal ability in Scenedesmus-lysing bacteria using optimized cryopreservation. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2016; 23:5925-5930. [PMID: 26593730 DOI: 10.1007/s11356-015-5822-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/03/2015] [Accepted: 11/16/2015] [Indexed: 06/05/2023]
Abstract
With the anthropogenic nutrient loading increasing, the frequency and impacts of harmful algal blooms (HABs) have intensified in recent years. To biocontrol HABs, many corresponding algal-lysing bacteria have been exploited successively. However, there are few studies on an effective algal-lysing culture collection to prevent cells from death and particularly the degradation of algicidal ability to their hosts. An optimized cryopreservation was developed and experiments on the validation of this method on preventing algicidal degradation and effects of this optimized cryopreservation on the survival rate of Scenedesmus-lysing bacterium, Enterobacter NP23, isolated from Scenedesmus sp. community, China, on the algicidal dynamic of Scenedesmus wuhanensis was investigated. The optimized cryoprotectant composition consists of 30.0 g/L gelatin, 48.5 g/L sucrose, and 28.4 g/L glycerol, respectively. Using this approach, the survival rate of NP23 cells can still maintain above 90 % and the algal-lysing rate only decline 4 % after the 18-month cryoprotection. Moreover, the 16 generations' passage experiment showed a significant (p < 0.05) genetic stability of algicidal capacity after 18 months. The growth dynamic of S. wuhanensis was investigated in a 5-L bioreactor during 132 h in the absence or presence of NP23. As a result, NP23 has a significant (p < 0.05) inhibition to S. wuhanensis growth when injected into algal culture in the exponential phase at 60th hour. In addition, S. wuhanensis culture initially with NP23 exhibited a slow growth, performing a prolonged lag phase without a clear stationary phase and then rapidly decreased. Our findings, combined with the capacity of preventing the degradation of algicidal ability collectively suggest that the use of this opitimized cryopreservation may be a promising strategy for maintaining algicidal cells.
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Affiliation(s)
- Chunli Liao
- College of Life Science and Engineering, Henan University of Urban Construction, Pingdingshan, 467036, Henan, China.
| | - Xiaobo Liu
- The Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, 214122, Jiangsu, China.
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Louzao MC, Abal P, Fernández DA, Vieytes MR, Legido JL, Gómez CP, Pais J, Botana LM. Study of Adsorption and Flocculation Properties of Natural Clays to Remove Prorocentrum lima. Toxins (Basel) 2015; 7:3977-88. [PMID: 26426051 PMCID: PMC4626715 DOI: 10.3390/toxins7103977] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2015] [Revised: 09/20/2015] [Accepted: 09/21/2015] [Indexed: 11/25/2022] Open
Abstract
High accumulations of phytoplankton species that produce toxins are referred to as harmful algal blooms (HABs). HABs represent one of the most important sources of contamination in marine environments, as well as a serious threat to public health, fisheries, aquaculture-based industries, and tourism. Therefore, methods effectively controlling HABs with minimal impact on marine ecology are required. Marine dinoflagellates of the genera Dinophysis and Prorocentrum are representative producers of okadaic acid (OA) and dinophysistoxins responsible for the diarrhetic shellfish poisoning (DSP) which is a human intoxication caused by the consumption of shellfish that bioaccumulate those toxins. In this work we explore the use of natural clay for removing Prorocentrum lima. We evaluate the adsorption properties of clays in seawater containing the dinoflagellates. The experimental results confirmed the cell removal through the flocculation of algal and mineral particles leading to the formation of aggregates, which rapidly settle and further entrain cells during their descent. Moreover, the microscopy images of the samples enable one to observe the clays in aggregates of two or more cells where the mineral particles were bound to the outer membranes of the dinoflagellates. Therefore, this preliminary data offers promising results to use these clays for the mitigation of HABs.
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Affiliation(s)
- Maria Carmen Louzao
- Departamento de Farmacología, Facultad de Veterinaria, Universidad de Santiago de Compostela, Lugo 27002, Spain.
| | - Paula Abal
- Departamento de Farmacología, Facultad de Veterinaria, Universidad de Santiago de Compostela, Lugo 27002, Spain.
| | - Diego A Fernández
- Departamento de Farmacología, Facultad de Veterinaria, Universidad de Santiago de Compostela, Lugo 27002, Spain.
| | - Mercedes R Vieytes
- Departamento de Fisiología Animal, Facultad de Veterinaria, Universidad de Santiago de Compostela, Lugo 27002, Spain.
| | - José Luis Legido
- PeloidesTermales S.L., Fonte das Abelleriras s/n. Edificio CITEXVI, Vigo 36310, Spain.
| | - Carmen P Gómez
- PeloidesTermales S.L., Fonte das Abelleriras s/n. Edificio CITEXVI, Vigo 36310, Spain.
| | - Jesus Pais
- Caolines de Vimianzo S.A.U., (CAVISA), Cerbán-Castrelo 19, Vimianzo A Coruña 15129, Spain.
| | - Luis M Botana
- Departamento de Farmacología, Facultad de Veterinaria, Universidad de Santiago de Compostela, Lugo 27002, Spain.
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