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Ai L, Guo J, Chen H, Hu D, Lu P. Degradation of Isotianil in Water and Soil: Kinetics, Degradation Pathways, Mechanisms, and Ecotoxicity Assessments. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2024. [PMID: 39028945 DOI: 10.1021/acs.jafc.4c02517] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/21/2024]
Abstract
Pesticides are transported and transformed in soil and can enter surface water through various pathways. They undergo hydrolysis, oxidation, and photoconversion in surface water. Isotianil is a new fungicide that effectively controls rice blast. However, there are limited reports on its degradation. Herein, the hydrolysis and photolysis of isotianil in water and its degradation in soil samples from five provinces of China were investigated. The degradation products of isotianil were identified using ultrahigh-performance liquid chromatography-Q exactive hybrid quadrupole-orbitrap high-resolution accurate mass spectrometry, and four compounds were discovered for the first time. The degradation pathways of isotianil were inferred, and the reaction active site and degradation mechanism of isotianil were clarified based on density functional theory calculations. The ecotoxicity of the degradation product M118 (aminobenzonitrile) was found to be moderate toward Daphnia magna, which was predicted and confirmed by Ecological Structure Activity Relationships and the experiment, respectively. The results of this study will contribute to a better understanding of the fate of isotianil in the environment.
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Affiliation(s)
- Lina Ai
- State Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Center for R&D of Fine Chemicals of Guizhou University, Guiyang 550025, China
| | - Junjiang Guo
- School of Chemical Engineering, Guizhou Institute of Technology, Guiyang 550003, PR China
| | - Hong Chen
- State Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Center for R&D of Fine Chemicals of Guizhou University, Guiyang 550025, China
| | - Deyu Hu
- State Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Center for R&D of Fine Chemicals of Guizhou University, Guiyang 550025, China
| | - Ping Lu
- State Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Center for R&D of Fine Chemicals of Guizhou University, Guiyang 550025, China
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Tanveer S, Ilyas N, Akhtar N, Akhtar N, Bostan N, Hasnain Z, Niaz A, Zengin G, Gafur A, Fitriatin BN. Unlocking the interaction of organophosphorus pesticide residues with ecosystem: Toxicity and bioremediation. ENVIRONMENTAL RESEARCH 2024; 249:118291. [PMID: 38301757 DOI: 10.1016/j.envres.2024.118291] [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: 10/10/2023] [Revised: 12/28/2023] [Accepted: 01/20/2024] [Indexed: 02/03/2024]
Abstract
Organophosphorus adulteration in the environment creates terrestrial and aquatic pollution. It causes acute and subacute toxicity in plants, humans, insects, and animals. Due to the excessive use of organophosphorus pesticides, there is a need to develop environmentally friendly, economical, and bio-based strategies. The microbiomes, that exist in the soil, can reduce the devastating effects of organophosphates. The use of cell-free enzymes and yeast is also an advanced method for the degradation of organophosphates. Plant-friendly bacterial strains, that exist in the soil, can help to degrade these contaminants by oxidation-reduction reactions, enzymatic breakdown, and adsorption. The bacterial strains mostly from the genus Bacillus, Pseudomonas, Acinetobacter, Agrobacterium, and Rhizobium have the ability to hydrolyze the bonds of organophosphate compounds like profenofos, quinalphos, malathion, methyl-parathion, and chlorpyrifos. The native bacterial strains also promote the growth abilities of plants and help in detoxification of organophosphate residues. This bioremediation technique is easy to use, relatively cost-effective, very efficient, and ensures the safety of the environment. This review covers the literature gap by describing the major effects of organophosphates on the ecosystem and their bioremediation by using native bacterial strains.
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Affiliation(s)
- Sadaf Tanveer
- Department of Botany, PMAS Arid Agriculture University Rawalpindi, Pakistan.
| | - Noshin Ilyas
- Department of Botany, PMAS Arid Agriculture University Rawalpindi, Pakistan.
| | - Nosheen Akhtar
- Department of Botany, PMAS Arid Agriculture University Rawalpindi, Pakistan.
| | - Nazish Akhtar
- Department of Botany, PMAS Arid Agriculture University Rawalpindi, Pakistan.
| | - Nageen Bostan
- Department of Botany, PMAS Arid Agriculture University Rawalpindi, Pakistan.
| | - Zuhair Hasnain
- Department of Agronomy, PMAS Arid Agriculture University Rawalpindi, Pakistan.
| | - Abdullah Niaz
- Pesticide Residue Laboratory, Institute of Soil Chemistry & Environmental Sciences, Kala Shah Kaku, Punjab, Pakistan.
| | - Gokhan Zengin
- Department of Biology, Science Faculty, Selcuk University, 42130, Konya, Turkey.
| | - Abdul Gafur
- Sinarmas Forestry Corporate Research and Development, Perawang, 28772, Indonesia.
| | - Betty Natalie Fitriatin
- Department of Soil Science and Land Resouces Management, Agriculture Faculty, Universitas Padjadjaran, Indonesia.
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Hu Y, Xiao R, Wang Y, Li J, Guo C, Bai J, Zhang L, Zhang K, Jorquera MA, Manquian J, Pan W. Distribution of organophosphorus pesticides and its potential connection with probiotics in sediments of a shallow freshwater lake. JOURNAL OF CONTAMINANT HYDROLOGY 2024; 261:104306. [PMID: 38244424 DOI: 10.1016/j.jconhyd.2024.104306] [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: 12/23/2023] [Revised: 01/09/2024] [Accepted: 01/16/2024] [Indexed: 01/22/2024]
Abstract
Despite the serious health threats due to wide use of organophosphorus pesticides (OPPs) have been experimentally claimed to be remediated by probiotic microorganisms in various food and organism models, the interactions between OPPs and probiotics in the natural wetland ecosystem was rarely investigated. This study delves into the spatial and temporal distribution, contamination levels of OPPs in the Baiyangdian region, the diversity of probiotic communities in varying environmental contexts, and the potential connection with OPPs on these probiotics. In typical shallow lake wetland ecosystem-Baiyangdian lake in north China, eight OPPs were identified in the lake sediments, even though their detection rates were generally low. Malathion exhibited the highest average content among these pesticides (9.51 ng/g), followed by fenitrothion (6.70 ng/g). Conversely, chlorpyrifos had the lowest detection rate at only 2.14%. The region near Nanliu Zhuang (F10), significantly influenced by human activities, displayed the highest concentration of total OPPs (136.82 ng/g). A total of 145 probiotic species spanning 78 genera were identified in Baiyangdian sediments. Our analysis underscores the relations of environmental factors such as phosphatase activity, pH, and electrical conductivity (EC) with probiotic community. Notably, several high-abundance probiotics including Pseudomonas chlororaphis, Clostridium sp., Lactobacillus fermentum, and Pseudomonas putida, etc., which were reported to exhibit significant potential for the degradation of OPPs, showed strongly correlations with OPPs in the Baiyangdian lake sediments. The outcomes of this research offer valuable insights into the spatiotemporal dynamics of OPPs in natural large lake wetland and the probability of their in-situ residue bioremediation through the phosphatase pathway mediated by probiotic such as Lactic acid bacteria in soils/sediments contaminated with OPPs.
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Affiliation(s)
- Yanping Hu
- College of Environment & Safety Engineering, Fuzhou University, Fuzhou 350108, China
| | - Rong Xiao
- College of Environment & Safety Engineering, Fuzhou University, Fuzhou 350108, China.
| | - Yaping Wang
- College of Environment & Safety Engineering, Fuzhou University, Fuzhou 350108, China
| | - Junming Li
- College of Environment & Safety Engineering, Fuzhou University, Fuzhou 350108, China
| | - Congling Guo
- College of Environment & Safety Engineering, Fuzhou University, Fuzhou 350108, China
| | - Junhong Bai
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China
| | - Ling Zhang
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China
| | - Kegang Zhang
- Department of Environmental Science and Engineering, North China Electric Power University, Baoding 071003, China
| | - Milko A Jorquera
- Department of Chemical Sciences and Natural Resources, University of La Frontera, Temuco 01145, Chile
| | - Javiera Manquian
- Department of Chemical Sciences and Natural Resources, University of La Frontera, Temuco 01145, Chile
| | - Wenbin Pan
- College of Environment & Safety Engineering, Fuzhou University, Fuzhou 350108, China
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Zhang B, Liu X, Wei W, Li X, Zhu H, Chen L. Environmental carrying capacity and ecological risk assessment of pesticides under different soil use types in the Central Plains Urban Agglomeration (CPUA), China. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2024; 341:122852. [PMID: 37944884 DOI: 10.1016/j.envpol.2023.122852] [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: 02/16/2023] [Revised: 06/12/2023] [Accepted: 10/30/2023] [Indexed: 11/12/2023]
Abstract
Soil environmental safety has received much attention during the past few decades due to its significance in agricultural production and human health. Special attention is required for soil pesticide residues and ecological risks. This study examined 197 soil samples from industrial, residential and agricultural areas for the presence of 12 organophosphorus pesticides (OPPs) and 8 synthetic pyrethroids (SYPs) in the 16 cities in Henan Province, and the center of CPUA, based on the Central Plains Urban Agglomeration (CPUA) concept proposed by China. The total average concentrations of ∑12OPPs in industrial, residential and agricultural soils were 194, 217, 267 ng/g dry weight, and those of ∑8SYPs were 26.8, 35.7, 25.5 ng/g dry weight, respectively. The two pollutants with the greatest concentrations in the soils were malathion and fenpropathrin, respectively, the dominant components of OPPs and SYPs. The soil environmental carrying capacity (SECC) analysis, representing the maximum residual load that can be supported, shows that acephate and cyhalothrin were overloaded, with a predicted period of over 500 years. Among the 16 cities of CPUA, a higher frequency of high ecological risk could be observed only in Shangqiu. The OPPs in children had total non-carcinogenic risk values of more than 1.0. Similarly, the non-carcinogenic risks of SYPs in adults and children in the residential areas were more than 1.0. The study provides knowledge on how to effectively manage soil safety in Henan Province, which is the center of the CPUA, with a large population and grain province to protect ecosystems and reduce the risks of soil pesticide residues in humans.
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Affiliation(s)
- Baozhong Zhang
- College of Environmental Engineering, Henan University of Technology, Lianhua Street 100, Zhengzhou, Henan, 450001, China; Department of Agricultural, Food and Nutritional Science, University of Alberta, Edmonton, AB, T6G 2P5, Canada.
| | - Xiaolong Liu
- College of Environmental Engineering, Henan University of Technology, Lianhua Street 100, Zhengzhou, Henan, 450001, China.
| | - Wenhao Wei
- College of Environmental Engineering, Henan University of Technology, Lianhua Street 100, Zhengzhou, Henan, 450001, China.
| | - Xiquan Li
- College of Environmental Engineering, Henan University of Technology, Lianhua Street 100, Zhengzhou, Henan, 450001, China.
| | - Huina Zhu
- College of Environmental Engineering, Henan University of Technology, Lianhua Street 100, Zhengzhou, Henan, 450001, China; Henan International Joint Laboratory of Environmental Pollution, Remediation and Grain Quality Security, Zhengzhou, 450001, Henan Province, China.
| | - Lingyun Chen
- Department of Agricultural, Food and Nutritional Science, University of Alberta, Edmonton, AB, T6G 2P5, Canada.
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Lu S, Zou T, Qin P, Zhang X, Wang G, Qin Y, Wang Q. Effect of organophosphate esters on microbial community and proteomics in constructed wetlands and its removal mechanism. CHEMOSPHERE 2023; 319:137803. [PMID: 36640982 DOI: 10.1016/j.chemosphere.2023.137803] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/29/2022] [Revised: 09/27/2022] [Accepted: 01/08/2023] [Indexed: 06/17/2023]
Abstract
Organophosphorus esters (OPEs) may cause potential risks to human health and ecological environment safety when they enter water. In this study, A lab-scale vertical flow constructed wetlands (VFCWs) exposed to dichlorvos (DDVP) was carried out to reveal removal effect and mechanism of DDVP in VFCWs. The findings indicated CWs can remove DDVP with 94%-95% average removal efficiency in long-term operation. Besides, soluble phosphate (SRP) and total phosphorus (TP) were removed by VFCWs with 48.60%-64.10% average removal efficiency, and the addition of DDVP enhanced the effect of CWs on nitrogen removal. High-throughput sequencing demonstrated that Massiilia (2.67%-18.06%), Denitratisoma (2.07%-3.80%) and SM1A02 (2.85%-4.67%) played an important role in the removal process of DDVP in VFCWs. Proteomics of plant root showed that A0A3B6ARQ4 (increased 29.53 times) and LOC_Os11g38050.1 protein (decreased 0.001 times) responsed more sensitive to OPEs which suggested DDVP enhancesenhancing plants energy production and hydrolyase synthesis, thereby promoting it hydrolysis. Therefore, the use of VFCWs to treat organic phosphate wastewater has future prospects.
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Affiliation(s)
- Shaoyong Lu
- State Environmental Protection Scientific Observation and Research Station for Lake Dongtinghu (SEPSORSLD), National Engineering Laboratory for Lake Pollution Control and Ecological Restoration, State Key Laboratory of Environmental Criteria and Risk Assessment, Research Centre of Lake Environment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China.
| | - Tao Zou
- College of Ecological Environment, Hainan Tropical Ocean University, Sanya, 572022, China
| | - Pan Qin
- State Environmental Protection Scientific Observation and Research Station for Lake Dongtinghu (SEPSORSLD), National Engineering Laboratory for Lake Pollution Control and Ecological Restoration, State Key Laboratory of Environmental Criteria and Risk Assessment, Research Centre of Lake Environment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China
| | - Xuan Zhang
- College of Ecological Environment, Hainan Tropical Ocean University, Sanya, 572022, China
| | - Guoqiang Wang
- College of Water Sciences, Beijing Normal University, Beijing, 100875, China
| | - Yuchun Qin
- College of Ecological Environment, Hainan Tropical Ocean University, Sanya, 572022, China
| | - Quan Wang
- College of Chemistry, Biology and Environment, Yuxi Normal University, Yuxi, 653100, China.
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Yu Y, Huang J, Jin L, Yu M, Yu X, Zhu X, Sun J, Zhu L. Translocation and metabolism of tricresyl phosphate in rice and microbiome system: Isomer-specific processes and overlooked metabolites. ENVIRONMENT INTERNATIONAL 2023; 172:107793. [PMID: 36739853 DOI: 10.1016/j.envint.2023.107793] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/10/2023] [Revised: 01/25/2023] [Accepted: 01/30/2023] [Indexed: 06/18/2023]
Abstract
Tricresyl phosphate (TCP) is extensively used organophosphorus flame retardants and plasticizers that posed risks to organisms and human beings. In this study, the translocation and biotransformation behavior of isomers tri-p-cresyl phosphate (TpCP), tri-m-cresyl phosphate (TmCP), and tri-o-cresyl phosphate (ToCP) in rice and rhizosphere microbiome was explored by hydroponic exposure. TpCP and TmCP were found more liable to be translocated acropetally, compared with ToCP, although they have same molecular weight and similar Kow. Rhizosphere microbiome named microbial consortium GY could reduce the uptake of TpCP, TmCP, and ToCP in rice tissues, and promote rice growth. New metabolites were successfully identified in rice and microbiome, including hydrolysis, hydroxylated, methylated, demethylated, methoxylated, and glucuronide- products. The methylation, demethylation, methoxylation, and glycosylation pathways of TCP isomers were observed for the first time in organisms. What is more important is that the demethylation of TCPs could be an important and overlooked source of triphenyl phosphate (TPHP), which broke the traditional understanding of the only manmade source of toxic TPHP in the environment. Active members of the microbial consortium GY during degradation were revealed and metagenomic analysis indicated that most of active populations contained TCP-degrading genes. It is noteworthy that the strains and function genes in microbial consortium GY that responsible for TCP isomers' transformation were different. These results can improve our understanding of the translocation and transformation of organic pollutant isomers in plants and rhizosphere microbiome.
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Affiliation(s)
- Yuanyuan Yu
- Guangdong Provincial Key Laboratory of Petrochemical Pollution Processes and Control, School of Environmental Science and Engineering, Guangdong University of Petrochemical Technology, Maoming, Guangdong 525000, China
| | - Jiahui Huang
- Guangdong Provincial Key Laboratory of Petrochemical Pollution Processes and Control, School of Environmental Science and Engineering, Guangdong University of Petrochemical Technology, Maoming, Guangdong 525000, China
| | - Ling Jin
- Department of Civil and Environmental Engineering and Department of Health Technology and Informatics, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong; State Key Laboratory of Marine Pollution, City University of Hong Kong, Kowloon, Hong Kong
| | - Miao Yu
- The Jackson Laboratory For Genomic Medicine 10 Discovery Dr, Farmington, CT 06032, USA
| | - Xiaolong Yu
- Guangdong Provincial Key Laboratory of Petrochemical Pollution Processes and Control, School of Environmental Science and Engineering, Guangdong University of Petrochemical Technology, Maoming, Guangdong 525000, China
| | - Xifen Zhu
- Guangdong Provincial Key Laboratory of Petrochemical Pollution Processes and Control, School of Environmental Science and Engineering, Guangdong University of Petrochemical Technology, Maoming, Guangdong 525000, China
| | - Jianteng Sun
- Guangdong Provincial Key Laboratory of Petrochemical Pollution Processes and Control, School of Environmental Science and Engineering, Guangdong University of Petrochemical Technology, Maoming, Guangdong 525000, China.
| | - Lizhong Zhu
- Department of Environmental Science, Zhejiang University, Hangzhou, Zhejiang 310058, China
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Pekkaya S, Yıldız E, Çabuk H. New di-(2-Ethylhexyl)Phosphoric Acid-Based Supramolecular Solvent (DEHPA-SUPRAS) Microextraction Coupled to High Performance Liquid Chromatography (HPLC) for the Determination of Organophosphorus Pesticides in Tea Drinks. ANAL LETT 2023. [DOI: 10.1080/00032719.2023.2167086] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Semra Pekkaya
- Faculty of Sciences, Department of Chemistry, Zonguldak Bülent Ecevit University, Zonguldak, Turkey
| | - Elif Yıldız
- Faculty of Sciences, Department of Chemistry, Zonguldak Bülent Ecevit University, Zonguldak, Turkey
| | - Hasan Çabuk
- Faculty of Sciences, Department of Chemistry, Zonguldak Bülent Ecevit University, Zonguldak, Turkey
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Kuang B, Xiao R, Hu Y, Wang Y, Zhang L, Wei Z, Bai J, Zhang K, Acuña JJ, Jorquera MA, Pan W. Metagenomics reveals biogeochemical processes carried out by sediment microbial communities in a shallow eutrophic freshwater lake. Front Microbiol 2023; 13:1112669. [PMID: 36713194 PMCID: PMC9874162 DOI: 10.3389/fmicb.2022.1112669] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Accepted: 12/19/2022] [Indexed: 01/12/2023] Open
Abstract
Introduction As the largest shallow freshwater lake in the North China Plain, Baiyangdian lake is essential for maintaining ecosystem functioning in this highly populated region. Sediments are considered to record the impacts of human activities. Methods The abundance, diversity and metabolic pathways of microbial communities in sediments were studied by metagenomic approach to reveal patterns and mechanism of C, N, P and S cycling under the threat of lake eutrophication. Results Many genera, with plural genes encoding key enzymes involved in genes, belonging to Proteobacteria and Actinobacteria which were the most main phylum in bacterial community of Baiyangdian sediment were involved in C, N, S, P cycling processes, such as Nocardioides (Actinobacteria), Thiobacillus, Nitrosomonas, Rhodoplanes and Sulfuricaulis (Proteobacteria).For instance, the abundance of Nocardioides were positively correlated to TN, EC, SOC and N/P ratio in pathways of phytase, regulation of phosphate starvation, dissimilatory sulfate reduction and oxidation, assimilatory sulfate reduction, assimilatory nitrate reduction and reductive tricarboxylic acid (rTCA) cycle. Many key genes in C, N, P, S cycling were closely related to the reductive citrate cycle. A complete while weaker sulfur cycle between SO4 2- and HS- might occur in Baiyangdian lake sediments compared to C fixation and N cycling. In addition, dissimilatory nitrate reduction to ammonia was determined to co-occur with denitrification. Methanogenesis was the main pathway of methane metabolism and the reductive citrate cycle was accounted for the highest proportion of C fixation processes. The abundance of pathways of assimilatory nitrate reduction, denitrification and dissimilatory nitrate reduction of nitrogen cycling in sediments with higher TN content was higher than those with lower TN content. Besides, Nocardioides with plural genes encoding key enzymes involved in nasAB and nirBD gene were involved in these pathways. Discussion Nocardioides involved in the processes of assimilatory nitrate reduction, denitrification and dissimilatory nitrate reduction of nitrogen cycling may have important effects on nitrogen transformation.
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Affiliation(s)
- Bo Kuang
- College of Environment and Safety Engineering, Fuzhou University, Fuzhou, China
| | - Rong Xiao
- College of Environment and Safety Engineering, Fuzhou University, Fuzhou, China,*Correspondence: Rong Xiao, ✉
| | - Yanping Hu
- College of Environment and Safety Engineering, Fuzhou University, Fuzhou, China
| | - Yaping Wang
- College of Environment and Safety Engineering, Fuzhou University, Fuzhou, China
| | - Ling Zhang
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing, China
| | - Zhuoqun Wei
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing, China
| | - Junhong Bai
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing, China
| | - Kegang Zhang
- Department of Environmental Science and Engineering, North China Electric Power University, Baoding, China
| | - Jacquelinne J. Acuña
- Department of Chemical Sciences and Natural Resources, University of La Frontera, Temuco, Chile
| | - Milko A. Jorquera
- Department of Chemical Sciences and Natural Resources, University of La Frontera, Temuco, Chile
| | - Wenbin Pan
- College of Environment and Safety Engineering, Fuzhou University, Fuzhou, China
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Tan H, Wu Q, Hao R, Wang C, Zhai J, Li Q, Cui Y, Wu C. Occurrence, distribution, and driving factors of current-use pesticides in commonly cultivated crops and their potential risks to non-target organisms: A case study in Hainan, China. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 854:158640. [PMID: 36113805 DOI: 10.1016/j.scitotenv.2022.158640] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/14/2022] [Revised: 08/26/2022] [Accepted: 09/06/2022] [Indexed: 06/15/2023]
Abstract
Multiple pesticides are heavily applied in crops grown in China's tropics due to the prevalence of diseases and pests, thus posing potential risks to nontarget organisms (e.g., honeybees, lacewings, ladybugs, and humans). However, there is little information on this topic. This study is the first assessment of the occurrence, driving factors, and ecological/human health risks of 32 current-use pesticides (CUPs) in 10 frequently-planted crops collected from practicing rice-vegetable rotation systems in Hainan, China. Of the 132 whole crop samples, 44 (33.3 %) residues from ≥8 pesticides were detected in 9.09 % of crop samples with concentrations ≥0.5 mg kg-1. Six pesticide residues, namely carbendazim, pyraclostrobin, acetamiprid, thiophanate methyl, phoxim, and imidacloprid, were detected in 72.7 % of samples, with concentrations ranging from 0.0021 to 13.5 (median = 0.032) mg kg-1. Among them, carbendazim, pyraclostrobin, and acetamiprid were the most common, contributions from 10.2 to 25.5 % and a detection frequency ranging from 25.6 to 56.1 %. The order of total concentration of 32 CUPs (∑32 CUP) concentrations during the year was January > May > November > August and vegetables > rice, being highly related with pesticides usage pattern, crop type, plant accumulation/dissipation and plant lipid contents. The ecological risk quotients (RQs) to four beneficial terrestrial organisms showed that 9.6-39.1 % of samples posed a potential medium or high ecological risk, with 13.6-65.9 % of samples at ∑RQ > 1 being highly affected by the residues of neonicotinoids and emamectin benzoate. Emamectin benzoate (8.9 %) and acetamiprid (5.6 %) exceeded the individual Maximum Residue Levels based on Chinese legislation (GB2763-2021). Moreover, cumulative dietary exposure presented a higher risk to humans in 11.0 and 22.0 % of the cases for acute and chronic, mainly originating from the higher concentration contributors of systemic pesticides in edible crops. Therefore, the regulation and monitoring of CUP residues is imperative for rice-vegetable rotation systems in tropical China to avoid negative effects on nontarget organisms.
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Affiliation(s)
- Huadong Tan
- Environment and Plant Protection Institute, Chinese Academy of Tropical Agricultural Sciences, Haikou 571101, PR China; Danzhou Scientific Observing and Experimental Station of Agro-Environment, Ministry of Agriculture and Rural Affairs, Danzhou 571737, PR China; National Agricultural Experimental Station for Agricultural Environment, Danzhou 571737, PR China; Hainan Engineering Research Center for Non-point Source and Heavy Metal Pollution Control, Danzhou 571737, PR China
| | - Qiumin Wu
- Environment and Plant Protection Institute, Chinese Academy of Tropical Agricultural Sciences, Haikou 571101, PR China; School of Resources and Environment, Central China Agricultural University, Wuhan 430070, PR China
| | - Rong Hao
- School of Resources and Environment, Central China Agricultural University, Wuhan 430070, PR China
| | - Chuanmi Wang
- Environment and Plant Protection Institute, Chinese Academy of Tropical Agricultural Sciences, Haikou 571101, PR China; College of Tropical Crops, Hainan University, Haikou 570228, PR China
| | - Jinlin Zhai
- College of Tropical Crops, Hainan University, Haikou 570228, PR China
| | - Qinfen Li
- Environment and Plant Protection Institute, Chinese Academy of Tropical Agricultural Sciences, Haikou 571101, PR China; Danzhou Scientific Observing and Experimental Station of Agro-Environment, Ministry of Agriculture and Rural Affairs, Danzhou 571737, PR China; National Agricultural Experimental Station for Agricultural Environment, Danzhou 571737, PR China; Hainan Engineering Research Center for Non-point Source and Heavy Metal Pollution Control, Danzhou 571737, PR China
| | - Yanmei Cui
- Environment and Plant Protection Institute, Chinese Academy of Tropical Agricultural Sciences, Haikou 571101, PR China
| | - Chunyuan Wu
- Environment and Plant Protection Institute, Chinese Academy of Tropical Agricultural Sciences, Haikou 571101, PR China; Danzhou Scientific Observing and Experimental Station of Agro-Environment, Ministry of Agriculture and Rural Affairs, Danzhou 571737, PR China; National Agricultural Experimental Station for Agricultural Environment, Danzhou 571737, PR China; Hainan Engineering Research Center for Non-point Source and Heavy Metal Pollution Control, Danzhou 571737, PR China.
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Olisah C, Rubidge G, Human LRD, Adams JB. Organophosphate pesticides in South African eutrophic estuaries: Spatial distribution, seasonal variation, and ecological risk assessment. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2022; 306:119446. [PMID: 35550133 DOI: 10.1016/j.envpol.2022.119446] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/22/2021] [Revised: 05/04/2022] [Accepted: 05/06/2022] [Indexed: 06/15/2023]
Abstract
The seasonal variation, spatial distribution, and ecological risks of thirteen organophosphate pesticides (OPPs) were studied in the Sundays and Swartkops estuaries in South Africa. Ten pesticides were detected in surface water samples from both estuaries, while all OPPs were detected in sediments. The highest concentration of OPPs (18.8 μg pyrazophos L-1) was detected in surface water samples from Swartkops Estuary, while 48.7 μg phosalone kg-1 dw was the highest in sediments collected from Sundays Estuary. There was no clear seasonal pattern in OPPs occurrence in surface water from both systems. However, their occurrence in sediments was in the following order: winter > autumn > summer > spring, perhaps indicating major pesticide input in the winter seasons. Results from ecological risk assessment showed that pyraclofos and chlorpyrifos (CHL) in surface water from both systems are respectively likely to cause high acute and chronic toxicity to fish (risk quotient - RQ > 1). For sediments of both estuaries, the highest acute and chronic RQs for fish were calculated for isazophos and CHL respectively. The majority of the detected OPPs in sediments posed potential high risks to Daphnia magna from both systems. These results suggest that these aquatic organisms (fish, and Daphnia), if present in the studied estuaries, can develop certain forms of abnormalities due to OPP exposure. To this end, proper measures should be taken to reduce OPP input into the estuarine systems.
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Affiliation(s)
- Chijioke Olisah
- DSI/NRF Research Chair, Shallow Water Ecosystems, Nelson Mandela University, PO Box 77000, Gqeberha, 6031, South Africa; Department of Botany, Institute of Coastal and Marine Research (CMR), Nelson Mandela University, PO Box 77000, Gqeberha, 6031, South Africa; Department of Chemistry, Nelson Mandela University, PO Box 77000, Gqeberha, 6031, South Africa.
| | - Gletwyn Rubidge
- Department of Chemistry, Nelson Mandela University, PO Box 77000, Gqeberha, 6031, South Africa
| | - Lucienne R D Human
- Department of Botany, Institute of Coastal and Marine Research (CMR), Nelson Mandela University, PO Box 77000, Gqeberha, 6031, South Africa; South African Environmental Observation Network (SAEON) Elwandle Coastal Node, PO Box 77000, Gqeberha, 6031, South Africa
| | - Janine B Adams
- DSI/NRF Research Chair, Shallow Water Ecosystems, Nelson Mandela University, PO Box 77000, Gqeberha, 6031, South Africa; Department of Botany, Institute of Coastal and Marine Research (CMR), Nelson Mandela University, PO Box 77000, Gqeberha, 6031, South Africa
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Roe RAL, MacFarlane GR. The potential of saltmarsh halophytes for phytoremediation of metals and persistent organic pollutants: An Australian perspective. MARINE POLLUTION BULLETIN 2022; 180:113811. [PMID: 35667258 DOI: 10.1016/j.marpolbul.2022.113811] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/17/2022] [Revised: 04/28/2022] [Accepted: 05/28/2022] [Indexed: 05/22/2023]
Abstract
Persistent organic and inorganic pollutants are among the most concerning pollutants in Australian estuaries due to their persistent, ubiquitous, and potentially toxic nature. Traditional methods of soil remediation often fall short of practical implementation due to high monetary investment, environmental disturbance, and potential for re-contamination. Phytoremediation is gaining traction as an alternative, or synergistic mechanism of contaminated soil remediation. Phytoremediation utilises plants and associated rhizospheric microorganisms to stabilise, degrade, transform, or remove xenobiotics from contaminated mediums. Due to their apparent cross-tolerance to salt, metals, and organic contaminants, halophytes have shown promise as phytoremediation species. This review examines the potential of 93 species of Australian saltmarsh halophytes for xenobiotic phytoremediation. Considerations for the practical application of phytoremediation in Australia are discussed, including mechanisms of enhancement, and methods of harvesting and disposal. Knowledge gaps for the implementation of phytoremediation in Australian saline environments are identified, and areas for future research are suggested.
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Affiliation(s)
- Rebecca A L Roe
- School of Environmental and Life Sciences, The University of Newcastle, Callaghan, New South Wales 2308, Australia
| | - Geoff R MacFarlane
- School of Environmental and Life Sciences, The University of Newcastle, Callaghan, New South Wales 2308, Australia.
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12
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Fang N, Lu Z, Hou Z, Zhang C, Zhao X. Hydrolysis and photolysis of flupyradifurone in aqueous solution and natural water: Degradation kinetics and pathway. CHEMOSPHERE 2022; 298:134294. [PMID: 35283145 DOI: 10.1016/j.chemosphere.2022.134294] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/13/2021] [Revised: 01/11/2022] [Accepted: 03/08/2022] [Indexed: 06/14/2023]
Abstract
Flupyradifurone (FPO) easily spreads to the water environment after application because of its high solubility in water (3200 mg/L, 20 °C), but as a novel neonicotinoid pesticide, its environmental fate study is still lacking. Here, laboratory experiments were conducted to investigate the degradation kinetics and pathways of FPO in aqueous solutions and natural waters. The results showed that FPO was fairly stable in water under natural conditions (the hydrolysis half-lives at 15 °C, 25 °C, and 35 °C were >150 d, and the photolysis half-lives under sunlight were >168 h). However, FPO was photodegraded rapidly under ultraviolet (UV) light (half-lives of 2.37-3.81 min). Then, indirect photolysis under UV light was examined with the addition of photosensitizers, revealing that direct photolysis is the main FPO degradation pathway in water, and the contribution of indirect photolysis was limited. Moreover, two photoproducts were separated, purified and collected via preparative HPLC, and identified via high resolution mass spectrometry. Then, the plausible photolysis pathway was proposed. The results of this study will contribute to a better understanding of the fate of FPO in the water environment.
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Affiliation(s)
- Nan Fang
- Ministry of Agriculture and Rural Affairs Key Laboratory for Pesticide Residue Detection, Institute of Agro-Products Safety and Nutrition, Zhejiang Academy of Agricultural Sciences, Hangzhou, 310021, China; College of Plant Protection, Jilin Agricultural University, Changchun, Jilin, 130118, China
| | - Zhongbin Lu
- College of Plant Protection, Jilin Agricultural University, Changchun, Jilin, 130118, China
| | - Zhiguang Hou
- College of Plant Protection, Jilin Agricultural University, Changchun, Jilin, 130118, China
| | - Changpeng Zhang
- Ministry of Agriculture and Rural Affairs Key Laboratory for Pesticide Residue Detection, Institute of Agro-Products Safety and Nutrition, Zhejiang Academy of Agricultural Sciences, Hangzhou, 310021, China.
| | - Xueping Zhao
- Ministry of Agriculture and Rural Affairs Key Laboratory for Pesticide Residue Detection, Institute of Agro-Products Safety and Nutrition, Zhejiang Academy of Agricultural Sciences, Hangzhou, 310021, China.
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13
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He Y, Yang G, Zhao J, Tan K, Yuan R, Chen S. Potentially tunable ratiometric electrochemiluminescence sensing based on conjugated polymer nanoparticle for organophosphorus pesticides detection. JOURNAL OF HAZARDOUS MATERIALS 2022; 432:128699. [PMID: 35325864 DOI: 10.1016/j.jhazmat.2022.128699] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2021] [Revised: 03/02/2022] [Accepted: 03/11/2022] [Indexed: 06/14/2023]
Abstract
In general, suitable double luminophores and their coreactants are necessary for constructing electrochemiluminescence (ECL) ratio strategy. However, the complexity of matching double luminophores and the stability and repeatability problem suffered by introducing exogenous coreactant would greatly limit the application of ratio detection. An original single-luminophore-based ECL ratio sensing was developed excluding any exogenous coreactants in this work. The poly [9,9-bis(3'-(N,N-dimethylamino)propyl)- 2,7-fluorene]-alt-2,7-(9,9-dioctylfluorene)] nanoparticles (PFN NPs) were explored to emit two anodic ECL signals. One centered at + 1.25 V (ECL-1) with the scanning potential of 0 ~ + 1.25 V and the other at + 1.95 V (ECL-2) with the scanning potential of 0 ~ + 1.95 V. ECL-1 showed a very strong emission without any exogenous coreactant. Importantly, hydrogen peroxide (H2O2) was able to efficiently weaken ECL-1 but strengthen ECL-2. When organophosphorus pesticides (OPs) were absent, the immobilized acetylcholinesterase-choline oxidase (AChE-ChOx) would catalyze the substrate acetylthiocholine chloride (ATCl) to produce H2O2, resulting in a quenched ECL-1 and an enhanced ECL-2. With the introduction of OPs, ECL-1 increased while ECL-2 accordingly decreased as OPs prohibited production of H2O2 by inhibiting activity of AChE. Highly sensitive ECL ratio detection for OPs was realized based on the change of the ratio of two signals. The dual anode emission properties of PFN NPs coupled with the opposite regulation of H2O2 on the two signals paved a new avenue for potentially tunable ECL ratio sensing strategy, and showed enormous potential applications for OPs analysis.
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Affiliation(s)
- Ying He
- Key Laboratory of Luminescence Analysis and Molecular Sensing (Southwest University), Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, PR China
| | - Guomin Yang
- Key Laboratory of Luminescence Analysis and Molecular Sensing (Southwest University), Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, PR China
| | - Jinwen Zhao
- Key Laboratory of Luminescence Analysis and Molecular Sensing (Southwest University), Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, PR China
| | - Kejun Tan
- Key Laboratory of Luminescence Analysis and Molecular Sensing (Southwest University), Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, PR China.
| | - Ruo Yuan
- Key Laboratory of Luminescence Analysis and Molecular Sensing (Southwest University), Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, PR China
| | - Shihong Chen
- Key Laboratory of Luminescence Analysis and Molecular Sensing (Southwest University), Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, PR China.
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Arisekar U, Shakila RJ, Shalini R, Jeyasekaran G, Padmavathy P. Effect of household culinary processes on organochlorine pesticide residues (OCPs) in the seafood (Penaeus vannamei) and its associated human health risk assessment: Our vision and future scope. CHEMOSPHERE 2022; 297:134075. [PMID: 35218780 DOI: 10.1016/j.chemosphere.2022.134075] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2021] [Revised: 02/05/2022] [Accepted: 02/19/2022] [Indexed: 06/14/2023]
Abstract
Food safety is crucial in today's competitive trading market, as it directly affects human health and promotes seafood exports. The effects of thermal processing (boiling, frying, grilling, and microwave cooking) on pesticide residues (PR) in P. vannamei were assessed. The PR in raw and processed shrimp ranged from 0.007 to 0.703 μg/kg for uncooked/raw, not detected (ND) to 0.917 μg/kg for boiled, ND to 0.506 μg/kg for fried, ND to 0.573 μg/kg for grilled and ND to 0.514 μg/kg for microwave cooked shrimps. The Endrin, endosulfan sulfate, and heptachlor were predominant PR found in the raw and processed shrimp. The PR content in raw and cooked shrimps were below the maximum residue limits (MRL) set by the Codex Alimentarius Commission (2021) and the European Commission (86/363/1986 and 57/2007). The estimated daily intake (EDI) of PR from raw and processed shrimps were below the ADI prescribed by CAC. The hazard quotient (HQ) and hazard ratio (HR) values were <1, indicating no non-carcinogenic or carcinogenic health implications through shrimp consumption. The estimated maximum allowable shrimp consumption rate (CRlim) suggests an adult can eat >100 shrimp meals/month, which is over the USEPA's (2000)recommendation of >16 meals/month without health issues. The Effect of thermal processing was detected in the following order: boiling < grilling < frying < microwave cooking. The processing factor (PF < 0.7), paired t-test (t < 0.05), Tukey post hoc (p < 0.05) test, Bray-Curtis similarity index, and matrix plot exhibited that all the four thermal processing methods have a considerable impact on pesticides in the processed shrimps. But frying (59.4%) and microwave cooking (60.3%) reduced PR far beyond boiling (48.8%) and grilling (51.3%). Hence, we recommend frying and microwave processing are better methods for minimizing PR in seafood than boiling or grilling.
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Affiliation(s)
- Ulaganathan Arisekar
- Tamil Nadu Dr. J. Jayalalithaa Fisheries University (TNJFU), Department of Fish Quality Assurance and Management, Fisheries College and Research Institute, Tuticorin, 628 008, Tamil Nadu, India.
| | - Robinson Jeya Shakila
- Tamil Nadu Dr. J. Jayalalithaa Fisheries University (TNJFU), Department of Fish Quality Assurance and Management, Fisheries College and Research Institute, Tuticorin, 628 008, Tamil Nadu, India.
| | - Rajendran Shalini
- Tamil Nadu Dr. J. Jayalalithaa Fisheries University (TNJFU), Department of Fish Quality Assurance and Management, Fisheries College and Research Institute, Tuticorin, 628 008, Tamil Nadu, India
| | - Geevaretnam Jeyasekaran
- Tamil Nadu Dr. J. Jayalalithaa Fisheries University (TNJFU), Nagapattinam, 611002, Tamil Nadu, India
| | - Pandurangan Padmavathy
- Department of Aquatic Environment and Management, Fisheries College and Research Institute, Tamil Nadu Dr. J. Jayalalithaa Fisheries University (TNJFU), Tuticorin, 628 008, Tamil Nadu, India
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Zeeshan QM, Qiu S, Gu J, Abbew AW, Wu Z, Chen Z, Xu S, Ge S. Unravelling multiple removal pathways of oseltamivir in wastewater by microalgae through experimentation and computation. JOURNAL OF HAZARDOUS MATERIALS 2022; 427:128139. [PMID: 34983009 PMCID: PMC8713958 DOI: 10.1016/j.jhazmat.2021.128139] [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: 10/24/2021] [Revised: 12/15/2021] [Accepted: 12/21/2021] [Indexed: 05/03/2023]
Abstract
Increased worldwide consumption of antiviral drugs (AVDs) amid COVID-19 has induced enormous burdens to the existing wastewater treatment systems. Microalgae-based bioremediation is a competitive alternative technology due to its simultaneous nutrient recovery and sustainable biomass production. However, knowledge about the fate, distribution, and interaction of AVDs with microalgae is yet to be determined. In this study, a concentration-determined influence of AVD oseltamivir (OT) was observed on the biochemical pathway of Chlorella sorkiniana (C.S-N1) in synthetic municipal wastewater. The results showed that high OT concentration inhibited biomass growth through increased oxidative stress and restrained photosynthesis. Nevertheless, complete OT removal was achieved at its optimized concentration of 10 mg/L by various biotic (82%) and abiotic processes (18.0%). The chemical alterations in three subtypes of extracellular polymeric substances (EPS) were primarily investigated by electrostatic (OT +8.22 mV vs. C.S-N1 -18.31 mV) and hydrophobic interactions between EPS-OT complexes supported by secondary structure protein analysis. Besides, six biodegradation-catalyzed transformation products were identified by quadrupole-time-of-flight mass spectrometer and by density functional theory. Moreover, all the TPs exhibited log Kow ≤ 5 and bioconcentration factor values of < 5000 L/kg, meeting the practical demands of environmental sustainability. This study broadens our understanding of microalgal bioadsorption and biodegradation, promoting microalgae bioremediation for nutrient recovery and AVDs removal.
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Affiliation(s)
- Qasim M Zeeshan
- Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse, School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Xiao Ling Wei 200, Nanjing 210094, Jiangsu, China
| | - Shuang Qiu
- Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse, School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Xiao Ling Wei 200, Nanjing 210094, Jiangsu, China
| | - Jia Gu
- Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse, School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Xiao Ling Wei 200, Nanjing 210094, Jiangsu, China
| | - Abdul-Wahab Abbew
- Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse, School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Xiao Ling Wei 200, Nanjing 210094, Jiangsu, China
| | - Zhengshuai Wu
- Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse, School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Xiao Ling Wei 200, Nanjing 210094, Jiangsu, China
| | - Zhipeng Chen
- Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse, School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Xiao Ling Wei 200, Nanjing 210094, Jiangsu, China
| | - Sai Xu
- Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse, School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Xiao Ling Wei 200, Nanjing 210094, Jiangsu, China
| | - Shijian Ge
- Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse, School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Xiao Ling Wei 200, Nanjing 210094, Jiangsu, China.
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Ohoro CR, Adeniji AO, Semerjian L, Okoh AI, Okoh OO. Occurrence and Risk Assessment of Polybrominated Diphenyl Ethers in Surface Water and Sediment of Nahoon River Estuary, South Africa. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27030832. [PMID: 35164097 PMCID: PMC8839697 DOI: 10.3390/molecules27030832] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/09/2021] [Revised: 01/18/2022] [Accepted: 01/19/2022] [Indexed: 11/29/2022]
Abstract
The concentrations, potential sources, and compositional profile of PBDEs in the surface water and sediment of Nahoon Estuary, East London, South Africa, were investigated with solid-phase extraction and ultra-sonication, respectively, followed by gas-chromatography-electron capture detection. The seasonal range of the contaminants’ concentrations in water and sediment samples in spring season were ∑PBDE 329 ± 48.3 ng/L (25.32–785 ng/L) and ∑PBDE 4.19 ± 0.35 ng/g dw (1.91–6.57 ng/g), but ∑PBDE 62.1 ± 1.50 ng/L (30.1–110 ng/L) and ∑PBDE 65.4 ± 15.9 ng/g dw (1.98–235 ng/g) in summer, respectively. NH1 (first sampling point) was the most contaminated site with PBDE in the Estuary. The potential source of pollution is attributed to the stormwater runoff from a creek emptying directly into the Estuary. This study’s dominant PBDE congener is BDE-17, ranging from below detection limit to 247 ng/L and 0.14–32.1 ng/g in water and sediment samples, respectively. Most detected at all the sites were BDE-17, 47, 66, and 100. Most BDE-153 and 183 are found in sediment in agreement with the fact that higher brominated congeners of PBDE adsorb to solid materials. There was no correlation between the congeners and organic carbon and organic matter. However, the human health risk assessment conducted revealed that the PBDE concentration detected in the estuary poses a low eco-toxicological risk. Nevertheless, constant monitoring should be ensured to see that the river remains safe for the users, as it serves as a form of recreation to the public and a catchment to some neighbourhoods.
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Affiliation(s)
- Chinemerem Ruth Ohoro
- SAMRC Microbial Water Quality Monitoring Centre, University of Fort Hare, Alice 5700, South Africa; (A.O.A.); (A.I.O.); (O.O.O.)
- Department of Pure and Applied Chemistry, University of Fort Hare, Alice 5700, South Africa
- Correspondence:
| | - Abiodun Olagoke Adeniji
- SAMRC Microbial Water Quality Monitoring Centre, University of Fort Hare, Alice 5700, South Africa; (A.O.A.); (A.I.O.); (O.O.O.)
- Department of Pure and Applied Chemistry, University of Fort Hare, Alice 5700, South Africa
- Department of Chemistry and Chemical Technology, National University of Lesotho, Roma P.O. Box 180, Lesotho
| | - Lucy Semerjian
- Department of Environmental Health Sciences, College of Health Sciences, University of Sharjah, Sharjah P.O. Box 27272, United Arab Emirates;
| | - Anthony Ifeanyi Okoh
- SAMRC Microbial Water Quality Monitoring Centre, University of Fort Hare, Alice 5700, South Africa; (A.O.A.); (A.I.O.); (O.O.O.)
- Department of Environmental Health Sciences, College of Health Sciences, University of Sharjah, Sharjah P.O. Box 27272, United Arab Emirates;
- Applied and Environmental Microbiology Research Group, Department of Biochemistry and Microbiology, University of Fort Hare, Alice 5700, South Africa
| | - Omobola Oluranti Okoh
- SAMRC Microbial Water Quality Monitoring Centre, University of Fort Hare, Alice 5700, South Africa; (A.O.A.); (A.I.O.); (O.O.O.)
- Department of Pure and Applied Chemistry, University of Fort Hare, Alice 5700, South Africa
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Olisah C, Human LRD, Rubidge G, Adams JB. Organophosphate pesticides sequestered in tissues of a seagrass species - Zostera capensis from a polluted watershed. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2021; 300:113657. [PMID: 34509819 DOI: 10.1016/j.jenvman.2021.113657] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/19/2021] [Revised: 08/22/2021] [Accepted: 08/28/2021] [Indexed: 06/13/2023]
Abstract
Organophosphate pesticides (OPPs) are persistent in the environment, but little information is available on their bioaccumulation in seagrass. In this study, the seagrass - Zostera capensis was collected from Swartkops Estuary in South Africa to investigate the bioaccumulation of OPPs from contaminated sediments and the water column. This plant was chosen because it grows abundantly in the estuary's intertidal zone, making it a viable phytoremediator in the urban environment. Extraction was performed by the QuEChERS method followed by GC-MS analysis. The mean concentration of ∑OPPs ranged from 0.01 to 0.03 μg/L for surface water; 6.20-13.35 μg/kg dw for deep-rooted sediments; 18.79-37.75 μg/kg dw for leaf tissues and 12.14-39.80 μg/kg dw for root tissues of Z. capensis. The biota-sediment accumulation factors (BSAFs) were greater than one, indicating the potential for Z. capensis to bioaccumulate and intercept the targeted pesticides. A weak insignificant correlation observed between log BSAFs and log Kow indicates that the bioaccumulation of OPPs in tissues of Z. capensis were not dependent on the Kow. Eight of the selected pesticides had root-leaf translocation factors (TFr-l) greater than 1, indicating that Z. capensis can transport these chemicals from roots to leaves. The results from this study implies that this plant species can clean up OPP contamination in the environment.
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Affiliation(s)
- Chijioke Olisah
- DSI/NRF Research Chair, Shallow Water Ecosystems, Nelson Mandela University, Port Elizabeth, South Africa; Department of Botany, Nelson Mandela University, Port Elizabeth, South Africa; Institute for Coastal and Marine Research (CMR), Nelson Mandela University, Port Elizabeth, South Africa; Department of Chemistry, Nelson Mandela University, Port Elizabeth, South Africa.
| | - Lucienne R D Human
- Institute for Coastal and Marine Research (CMR), Nelson Mandela University, Port Elizabeth, South Africa; South African Environmental Observation Network (SAEON) Elwandle Coastal Node Nelson Mandela University, Port Elizabeth, South Africa
| | - Gletwyn Rubidge
- Department of Chemistry, Nelson Mandela University, Port Elizabeth, South Africa
| | - Janine B Adams
- DSI/NRF Research Chair, Shallow Water Ecosystems, Nelson Mandela University, Port Elizabeth, South Africa; Department of Botany, Nelson Mandela University, Port Elizabeth, South Africa; Institute for Coastal and Marine Research (CMR), Nelson Mandela University, Port Elizabeth, South Africa
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