Chemistry and Ecology最新文献

{"title":"Investigation of mucus cell change in gills of van fish ( <i>Alburnus tarichi</i> , Güldenstädt, 1814) treated with fluvalinate","authors":"Zehra Alkan, Elif Kaval Oğuz, Ahmet Regaib Oğuz","doi":"10.1080/02757540.2023.2263444","DOIUrl":"https://doi.org/10.1080/02757540.2023.2263444","url":null,"abstract":"ABSTRACTThe Van fish is an endemic carp species living in Lake Van, one of the largest soda lakes in the world. Fluvalinate is a pesticide used extensively in the Lake Van basin. In the present study, the effects of sublethally applied fluvalinate on mucous cells in Van fish gill tissue after 48, 72, and 96 h were determined histochemically. Histopathological lesions were observed in the gills of the fish exposed to fluvalinate in a time-dependent manner. The concentrations of neutral glycoconjugates, acidic glycoconjugates, sulfated acidic glycoconjugates, and strongly acidic glycoconjugates in the mucous cells increased in the gills of the Van fish during the exposure period. At the same time, the area and number of mucous cells increased during fluvalinate exposure. As a result, fluvalinate caused an increase in mucous secretion and content in Van fish gills.KEYWORDS: Fluvalinateglycoconjugatehistopathologypesticideteleost Disclosure statementNo potential conflict of interest was reported by the authors.Ethics approvalAll of the animal experimental procedures were performed in accordance with the animal study protocols approved by the Animal Researchers Local Ethic Committee of Van Yüzüncü Yıl University (protocol no: 2018/05) and the Republic of Turkey Ministry of Agriculture and Forestry (31/05/2018).Availability of data and materialAll relevant data are within the paper, and those are available at the corresponding author.Authors’ contributionsAhmet Regaib Oğuz and Elif Kaval Oğuz conceived the study and designed the experiments. Elif Kaval Oğuz and Zehra Alkan carried out the histology analysed the data. Ahmet Regaib Oğuz and Elif Kaval Oğuz wrote and revised the manuscript. All authors read and approved the final manuscript.Additional informationNotes on contributorsZehra AlkanZehra Alkan completed her doctorate at Van Yüzüncü Yıl University. His studies focused on fish physiology.Elif Kaval OğuzElif Kaval Oğuz is an associate professor in the Department of Science Education, Van Yüzüncü Yıl University, Turkey. She obtained her PhD in Neuroscience from Medicine Faculty. She is currently working with cell cultures.Ahmet Regaib OğuzAhmet Regaib Oğuz is a professor in the Department of Biology, Van Yüzüncü Yıl University, Turkey. His research focuses on ecotoxicity and osmoregulation.","PeriodicalId":9960,"journal":{"name":"Chemistry and Ecology","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135536469","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Lead biosorption profiling of endophytic Aspergillus flavus SGE34 isolated from Cleome viscosa Linn.","authors":"Samiksha Sharma, Kishan Lal Tiwari, Shailesh Kumar Jadhav","doi":"10.1080/02757540.2023.2253224","DOIUrl":"https://doi.org/10.1080/02757540.2023.2253224","url":null,"abstract":"ABSTRACT\u0000 Lead is an environmental pollutant that causes remarkable damage to various organs in the human body, especially the nervous system. Removal of lead by conventional methods is costly, and therefore, in the current scenario, biosorption using fungi is extensively explored as they provide good metal uptake systems. The present study evaluated the Pb (II) biosorption potential of endophytic fungi Aspergillus flavus SGE34. The fungal isolate was obtained from the root of an indigenous medicinal plant of the Chhattisgarh region named Cleome viscosa Linn. The biosorption potential of dead fungal biomass was optimized at different operating parameters like contact time, pH, and temperature. The maximum biosorption values were found at pH 6.0 with an equilibrium time of 150 minutes at 350C. The Fourier transform infrared spectroscopy study revealed that the pattern of new absorption bands, altered absorption intensity, and shift in wavenumber of functional groups was deduced, due to interaction between metal ions and active sites of biosorbent. The present study concluded that A. flavus SGE34 has high metal tolerance and biosorption capacity; it could effectively remove lead from industrial effluents.","PeriodicalId":9960,"journal":{"name":"Chemistry and Ecology","volume":" ","pages":""},"PeriodicalIF":2.5,"publicationDate":"2023-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44588151","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Assessment of the health status of Lake Nokoué (Benin, West Africa) exposed to multiple pollutants during flood season","authors":"Agbohessi T Prudencio, Onibon Chabi, Pelebe Edéya Orobiyi Rodrigue, Mattah Dzorgbe Agbeko Precious, Guedegba Nicresse Léa, Imorou Toko Ibrahim, Chikou Antoine","doi":"10.1080/02757540.2023.2253225","DOIUrl":"https://doi.org/10.1080/02757540.2023.2253225","url":null,"abstract":"ABSTRACT This study used the levels of pollutants and the histopathological analysis of the gonads and liver of Sarotherodon melanotheron sampled in Lake Nokoué and Lake Toho, both in Benin (West Africa) to assess the health status of the ecosystems. Sixty adults (30 males and 30 females) of this species were caught during the flooding seasons from both Lake Nokoué, and Lake Toho (as a reference). The physicochemical parameters of the water and the heavy metal contents (Pb, Cd, Hg) in water/sediment/fish of three sites (S1, S2, S3) in Lake Nokoué and two sites (S4, S5) in Lake Toho were analysed. Results confirm very strong organic status with organic pollution index ranging from 1.25 to 1.5. Pb, Cd, and Hg levels in the water/sediment/fish muscle tissue of Lake Nokoué were far exceeding international standards. The histopathology of gonads revealed testis-ova up to 40% in males and follicular atretic oocytes up to 33.33% in females, indicated oestrogenic effects from the pollutants with a delay of spermatogenesis and stimulation of oogenesis. The histopathology of the liver revealed the presence of regressive changes. The findings call for actions to protect the ecosystem from pollution and attention in terms of health of humans consuming fish products from Lake Nokoué.","PeriodicalId":9960,"journal":{"name":"Chemistry and Ecology","volume":" ","pages":""},"PeriodicalIF":2.5,"publicationDate":"2023-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43954167","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A review on ecology implications and pesticide degradation using nitrogen fixing bacteria under biotic and abiotic stress conditions","authors":"Chahat Sharma, Pooja Sharma, Amit Kumar, Yashika Walia, Raman Kumar, Ahmad Umar, Ahmed A. Ibrahim, Mohd. Sayeed Akhtar, Abdulrab Ahmed M. Alkhanjaf, Sotirios Baskoutas","doi":"10.1080/02757540.2023.2253220","DOIUrl":"https://doi.org/10.1080/02757540.2023.2253220","url":null,"abstract":"ABSTRACTThe excessive use of chemical substances such as pesticides, herbicides, and fungicides, along with other harmful practices, has disrupted the beneficial microflora in the soil. These harmful effects extend beyond the soil and can lead to the spread of dangerous diseases in both humans and animals. Pesticides are frequently applied in modern agriculture to boost crop production and meet the demands of a growing population. However, the accumulation of pesticides in the soil poses a threat to both the soil itself and the overall ecosystem. As pesticides enter the food chain, groundwater, and marine water, they have direct or indirect impacts on human health and negatively affect terrestrial and aquatic life. These chemical compounds contribute to various biological and microscopic contaminants, resulting in detrimental environmental consequences. Fortunately, certain microorganisms possess natural tolerance to pesticides and can survive under adverse conditions. Diazotrophs, which are nitrogen-fixing bacteria, have also been found to play a role in the biodegradation of toxic compounds released from pesticides, thereby contributing to a healthier environment. This review focuses on the essential microbial community involved in pesticide degradation, with particular emphasis on Diazotrophs. It explores their classification, mechanisms of pesticide degradation, and regulation under stress conditions. Understanding the characteristics of these essential microbes (Diazotrophs) operating in stressful environments is crucial for pesticide degradation. The study highlights the significant role of microbial diversity in the breakdown of xenobiotic pesticide compounds in the soil, emphasising the importance of an eco-friendly approach to improve agricultural practices, sustain soil fertility, promote crop production, and protect ecotoxicology.KEYWORDS: PesticideDiazotrophsSoilCropDegradationBacteria AcknowledgmentAuthors are thankful to Maharishi Markandeshwar (Deemed to Be University), Mullana for providing the work place and all the essential facilities to compile the manuscript. We also acknowledge to bioRendor tool for designing the template of figures. The authors are thankful to the Deanship of Scientific Research at Najran University, Najran, Kingdom of Saudi Arabia for funding under the Research Group funding program grant no. NU/RG/MRC/12/2.Disclosure statementNo potential conflict of interest was reported by the author(s).Data availabilityThe datasets generated during the current study are available from the corresponding author on reasonable request.Statement and declarationsThe authors are declared that the manuscript is original and not submitted to any other journal for publication.Consent to publishAuthors have used bioRendor app for drawing figures used in manuscript. The authors acknowledge the app and given reference in figure legends.Additional informationNotes on contributorsChahat SharmaMs. Chahat Sharma is an efficient researc","PeriodicalId":9960,"journal":{"name":"Chemistry and Ecology","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135746308","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Variation in microbial biomass and enzymatic activities in metal contaminated soils during storage at low temperature (4°C)","authors":"Alistar Moy, Kabwe Nkongolo","doi":"10.1080/02757540.2023.2253222","DOIUrl":"https://doi.org/10.1080/02757540.2023.2253222","url":null,"abstract":"ABSTRACT Microbial response to soil storage at low temperature in limed and unlimed samples has not been investigated. For this study, soil samples were kept at 4°C for six weeks. Soil microbial biomass was determined using phospholipid fatty acid analysis (PLFA). Nine enzymes were targeted including β-glucosidase (BG), cellobiohydrolase (CBH), β-N-acetylglucosaminidase (NAGase), aryl sulfatase (AS), acid phosphatase (AP), alkaline phosphatase (AlP), glycine aminopeptidase (GAP), leucine aminopeptidase (LAP), and peroxidase (PER). PLFA results revealed a significant increase in total microbial biomass in limed area compared to unlimed soil samples. Microbial biomass decreased during the first two weeks of storage and remained unchanged thereafter for both limed and unlimed samples. Analysis of microbial activities revealed that most enzymes inconsistently decreased over time during storage at 4°C. Activities of BG, CBH, NAGase, AlP, AS, GAP, LAP were significantly higher in limed compared to the unlimed samples. Overall, the levels of activities of most enzymes in limed soils decreased significantly after the second week of storage and remained unchanged thereafter. The reduction of enzyme activity in the unlimed soil samples varied over time, with some enzymes such as LAP increasing on the sixth week. PER activity decreased after two weeks and increased thereafter.","PeriodicalId":9960,"journal":{"name":"Chemistry and Ecology","volume":"39 1","pages":"688 - 709"},"PeriodicalIF":2.5,"publicationDate":"2023-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48034219","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The potential ameliorative impacts of rare earth element cerium in dimethoate induced toxicity in freshwater mussel <i>Dreissena polymorpha</i>","authors":"Osman Serdar, Zozan Ketenalp, Nuran Cikcikoglu Yildirim","doi":"10.1080/02757540.2023.2256730","DOIUrl":"https://doi.org/10.1080/02757540.2023.2256730","url":null,"abstract":"ABSTRACT The purpose of this study was to measure the antioxidant parameters to examine the potential ameliorative impacts of the rare earth element (REE) cerium (Ce) in dimethoate (DM) induced toxicity in Dreissena polymorpha. Lethal concentration 50 (LC50) of DM for 96 h was measured. The antioxidant effect of Ce was investigated by exposure of 1/2 of the LC50 value of DM together with 4, 20 and, 100 mg/L of Ce to D. polymorpha. The responses of the biomarkers were determined by measuring the superoxide dismutase (SOD), catalase (CAT), glutathione peroxidase (GPx), glutathione (GSH) and malondialdehyde (MDA) levels. SOD, CAT, GPX and GSH levels were reduced (p < 0.05), while the MDA levels increased significantly (p < 0.05) in mussels exposed to DM. When DM was exposured together with Ce, it was observed that the MDA levels decreased, SOD, CAT, GPX and GSH levels increased during 24 and 96 h. The results of our study showed that Ce exerted a strong antioxidant effect on toxicity induced by DM. It has been shown that Ce may have a compensatory effect with the positive change in the antioxidant response of D. polymorpha to DM. This study is the first report about Ce and insecticide effects in bivalves.","PeriodicalId":9960,"journal":{"name":"Chemistry and Ecology","volume":"99 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135745452","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Hydrothermal pretreatment of <i>Platanus orientalis Linn</i> fallen leaves: effects of process conditions on anaerobic digestion","authors":"Lei Gong, Xiaofan Ma, Hongbin Xue, Chunqian Guo, Shijun Zhang, Jun Zhou, Haonan Zhang","doi":"10.1080/02757540.2023.2253239","DOIUrl":"https://doi.org/10.1080/02757540.2023.2253239","url":null,"abstract":"ABSTRACTPlatanus orientalis Linn is widely distributed as a famous street tree, and its fallen leaves are a rich biomass resource. The fallen leaves of Platanus orientalis Linn (FLPOL) can be resourcefully treated by generating biogas through anaerobic digestion. This study aimed to assess the anaerobic digestion (AD) performance of FLPOL under different hydrothermal pretreatment (HTP) conditions (solid–liquid ratio 2–10%, residence times 0.5–2.5 h, and temperatures 120–200°C). The solid–liquid ratio, residence time, and temperature determined by energy balance calculation were 6%, 2.0 h, and 180°C, respectively, and the energy balance was 1.823 kJ/g biomass. Under these conditions, the methane yield of the process water was 56.85 mL/g·VS. The methanogenic potential, hydrolysis rate, maximum methanogenic rate, and the lag period obtained by the Fitzhugh first-order kinetic model and the modified Gompertz model were 101.803 mL/g·VS, 0.130 d−1, 14.207 mL/(g·VS·d) and 1.332 d, respectively. The research results suggest that HTP has an important role in promoting the large-scale AD application of FLPOL.KEYWORDS: Anaerobic digestionPlatanus orientalis Linn fallen leavesenergy balancehydrothermal pretreatmentkinetic simulation AcknowledgmentsThe authors acknowledge Xiaocong Liu and Tong Zuo for their support in the laboratory.Disclosure statementNo potential conflict of interest was reported by the author(s).Additional informationNotes on contributorsLei GongLei Gong (male), Associate Professor, Master Supervisor, Cleaner Production Auditor, Member of Shandong Environmental Impact Assessment Expert Database, Director of Environment and Safety Teaching Experiment Center. Mainly engaged in the research work of biological treatment technology of odor and organic waste gas, anaerobic digestion of organic waste, microbial fuel cell and so on. Presided over and participated in more than 20 scientific research projects and 1 technology transformation project since work; participated in the formulation of 1 national standard and 1 industry group standard as the main editor, published more than 20 academic papers, edited 1 monograph, and participated in the editing 1 textbook; 17 authorised patents, including 4 invention patents and 1 invention patent assignment.Xiaofan MaXiaofan Ma (Female), graduate student, studying in Qingdao University of Science and Technology, College of Environment and Safety Engineering, the main research direction is the use of microbial fuel cell treatment of methane, has been published in the journal of the Sci paper (First authors).Hongbin XueHongbin Xue (male), Worked in the Safety and Environment Department of Shandong Diantu Ecological Environment Engineering Co.Chunqian GuoChunqian Guo (male), graduate student, studying in Qingdao University of Science and Technology, College of Environment and Safety Engineering, at present, the research direction is anaerobic product recycling, and two research papers have been published.Shij","PeriodicalId":9960,"journal":{"name":"Chemistry and Ecology","volume":"124 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135747304","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The antioxidant properties of Spirulina (microalgae) can reduce oxidative stress and neurotoxicity caused by mercury in freshwater mussels","authors":"Oumaima Abidi, A. Khazri, Hanen Smii, Rihab Belgacem, E. Mahmoudi, H. Beyrem, Mezni Amine, M. Dellali","doi":"10.1080/02757540.2023.2231948","DOIUrl":"https://doi.org/10.1080/02757540.2023.2231948","url":null,"abstract":"ABSTRACT The aim of this study was to investigate the deleterious effects of mercuric chloride (HgCl2) on the oxidative status and neurotoxicity of Unio ravoisieri, a freshwater mussel, and the potential protective role of Spirulina (SP) as a dietary supplement. The experiment was conducted in a laboratory setting, with two concentrations of HgCl2 (40 and 80 μg/L) administered either alone or in combination with 20 mg/L of SP over a period of seven days. Samples of the mussel's gills and digestive gland were collected following exposure, and levels of antioxidants (CAT, GST), H2O2, GSH, and damage markers (MDA) were measured, along with the activity of the neurotoxicity enzyme, AChE. The results indicated that exposure to HgCl2 resulted in an increase in lipid peroxidation and antioxidant enzyme levels in both the gills and digestive gland. However, the addition of SP to the diet of the mussels restored the levels of antioxidant enzymes, reduced oxidative stress, and decreased neurotoxicity biomarkers (AChE). These findings suggest that SP at a concentration of 20 mg/L can serve as a natural solution to mitigate the toxicity of HgCl2 in freshwater mussels.","PeriodicalId":9960,"journal":{"name":"Chemistry and Ecology","volume":"1 1","pages":""},"PeriodicalIF":2.5,"publicationDate":"2023-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43903518","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Hydrogeochemical characteristics and multivariate statistical approach for monitoring groundwater quality scenario in the vicinity of industrial area of western Himalaya, India","authors":"K. Singh, G. Tewari, M. Bisht, R. Tiwary, Suresh Kumar, K. Patni, Aabha Gangwar, Bhawana Kanyal","doi":"10.1080/02757540.2023.2224794","DOIUrl":"https://doi.org/10.1080/02757540.2023.2224794","url":null,"abstract":"ABSTRACT In the present investigation, 50 groundwater samples were collected from Udham Singh Nagar District of Kumaun Himalaya in the pre-monsoon season and 15 physicochemical parameters were analysed using standard procedures. Here, we represent the chemistry of major cations and anions to know the overall water quality and hydrogeochemical characteristics controlling the solute acquisition processes and sources of elements in the study area. The analytical results revealed that in the groundwater samples, Ca2+ and Mg2+ were the dominant cations and was the most dominant anion in the study area. In all the groundwater samples, the content of alkaline earth metals (Ca2++ Mg2+) exceeded the mean content of alkalis (Na+ +K+). In 62% of groundwater samples, the value of weak acid ( ) exceeded the content of strong acid (Cl− + ). Piper diagram, molar ratios and statistical techniques indicated that weathering of carbonate and silicate minerals mostly managed the solute acquisition process with very less involvement of human activities. Most of the groundwater samples were found suitable for potable and domestic purposes except for a few locations nearby SIKDKUL or other industries (the eastern and western part of the study area). Correlation analysis revealed the dependency of WQI values on Fe and Mn content.","PeriodicalId":9960,"journal":{"name":"Chemistry and Ecology","volume":"39 1","pages":"611 - 639"},"PeriodicalIF":2.5,"publicationDate":"2023-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47416067","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Redox potential as an important characteristic of the chemical and biological state of surface waters (review)","authors":"P. Linnik, V. Osadchyi, N. Osadcha, R. Linnik","doi":"10.1080/02757540.2023.2225496","DOIUrl":"https://doi.org/10.1080/02757540.2023.2225496","url":null,"abstract":"ABSTRACT This review summarises literature data on redox potential (Eh) as an essential characteristic of surface waters affecting their ecological and chemical state. We consider the influence of Eh on the migration of nutrients, metals, and metalloids in the ‘bottom sediments – water’ system and its role in the secondary pollution of water bodies. Hypoxia, anaerobic conditions, and reduced Eh leads to an increase in the concentration of nutrients, reduced forms of manganese and iron, due to their migration from bottom sediments to the aquatic environment. This, in turn, contributes to enhanced eutrophication of water bodies. We reviewed the data on the transformation of metal and metalloid compounds depends on the intensity of redox processes resulting their bioavailability, and toxicity to aquatic organisms. Humic substances, as the most common group of dissolved surface water organic substances, exhibit reducing properties and affect the coexisting metals and metalloid species. The intensity of redox processes in surface water will increase under climate change. The issue of redox transformation of elements will need to be considered in the context of developing measures to reduce surface water loading with primarily nutrients and metals, taking into account the possibility of internal pollution of water bodies.","PeriodicalId":9960,"journal":{"name":"Chemistry and Ecology","volume":"39 1","pages":"640 - 672"},"PeriodicalIF":2.5,"publicationDate":"2023-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48394271","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}