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Journal of Environmental Sciences 2023年第7期129卷 202-212页

作者： Fusheng Sun Guanghui Yu Xingxing Han Zhilai Chi Yunchao Lang Congqiang Liu Institute of Surface-Earth System Science School of Earth System ScienceTianjin Key Laboratory of Earth Critical Zone Science and Sustainable Development in Bohai RimTianjin UniversityTianjin 300072China

The excessive accumulation of potentially toxic metals(Pb and Cd)in coastal wetlands is among the main factors threateningwetland ***,the effects ofwater table depth(WTD)on the risk and binding mechanisms of potentially toxic metals in sediments remain ***,sediments from different WTD obtained from a typical coastal wetland were evaluated using a newly developed strategy based on chemical extraction methods coupled with high-resolution *** findings indicated that the WTD of the coastal wetland fluctuates frequently and the average enrichment factor for Pb was categorized as minor,whereas Cd enrichment was categorized as ***-resolution spectroscopy techniques also demonstrated that organic functional groups and partly inorganic compounds(e.g.,Fe-O/Si-O)played a vital role in the binding of Pb and Cd to surface ***,mineral components rather than organic groups were mainly bound to thesemetals in the bottom ***,our findings provide key insights into the potential health effects and binding characteristics of potentially toxic metals in sediments,as well as their dynamic behavior under varying sediment depths at a microscale.

关键词： Coastal wetlands Wetland sediment toxic metals Risk assessment Synchrotron radiation Binding mechanisms

Treatment of tunnel wash waters-experiments with organic sorbent materials. PartⅡ: Removal of toxic metals

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Journal of Environmental Sciences 2008年第8期20卷 1042-1045页

作者： PARUCH Adam M ROSETH Roger Bioforsk-the Norwegian Institute for Agricultural and Environmental Research Soil and Environment Division

In the first part of the article, the column and the bag experiments concerning removal of polycyclic aromatic hydrocarbons (PAHs) and nonpolar oil (NPO) from tunnel wash waters using organic sorbent materials have been described. This part presents the results of removal of toxic metals. The metals of concern (Al, As, Cd, Cr, Cu, Fe, Pb, Mo, Ni, and Zn) were selected based on the priority toxicant pollutants defined in surface water quality criteria. Concentrations of these metals in the collected effluent...

关键词： electrostatic filters reduction level sorbents tunnel toxic metals treatment efficiency wash water

Adsorption of toxic metals and Control of Mosquitos-borne Disease by Lysinibacillus sphaericus:Dual Benefits for Health and Environment

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Biomedical and Environmental Sciences 2016年第3期29卷 187-196页

作者： Javier Edo.Vargas Jenny Dussan Biological Sciences Universidad De Los AndesBogota 111711Colombia

Objective Assessment of the bacterium L. sphaericus as a dual-action candidate for biological control of mosquito-borne diseases and bioremediation of toxic metals. Methods Larvae of the mosquito, C quinquefasciatus, were first evaluated for metal tolerance and then exposed to 5 ppm cadmium, chromium, arsenic, and lead in assays together with seven strains of L. sphaericus. A probit regression analysis was used to estimate the LCso of Cd, Cr, As, and Pb to C. quinquefosciatus. An analysis of covariance and multifactorial ANOVA examined the metal biosorption and larvicidal properties of the seven strains of L. sphaericus. Results We found that L. sphaericus adsorbed the toxic metal ions and was toxic against mosquito larvae. The L. sphoericus strain 111（3）7 resulted in a larvae mortality of over 80% for all the tested metals. This strain also exhibited the capacity to adsorb 76% of arsenic, 32% of lead, 25% of chromium, and 7% of cadmium. Conclusion This study found combined metal adsorption and larval toxicity associated with three strains of L. sphaericus [111（3）7, OT4b.31, and CBAM5]. This suggests that a combination of these strains shows strong dual potential for biological control of mosquitos in heavy metal-contaminated areas and remediate the heavy metal contamination as well.

关键词： Lysinibacillus sphaericus Culex quinquefasciatus Entomopathogen toxic metals Heath

Assessment of Exposure to toxic metals through Food with Reference to Some Towns in Russia

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Journal of Environmental Science and Engineering 2010年第4期4卷 53-61页

作者： B.A. Katsnelson S.V. Kuzmin T.V. Mazhayeva A.N. Lavrentyev L.I. Privalova V.B. Gurvich O.L. Malykh Ural Regional Center for Environmental Epidemiology Ekaterinburg Russia Sverdlovsk Regional Office of the Federal Service on Surveillance in the Sphere of Consumer Rights Protection and Human Well-Being in the Russian Federation Ekaterinburg Russia

In big countries, nutrition profiles and foodstuffs chemical contamination may differ significantly between different regions and even between areas within a region. Thus one should assess toxic exposure through food on not only national but also local level. We have developed and distributed a personal questionnaire for estimating average daily consumption of 44 types of foodstuffs, and for 12 of them-the percentage contribution of the main sources of supply. Depending on data analysis results, we choose the most important foodstuffs for determining their chemical contamination. We tested this approach in 7 industrial towns and found differences among them, as well as among children and adults, with regard to toxic exposure through food. People with a relatively high income consume more milk, cheese, meat, fish, poultry and fruit but less bread and potatoes than those with medium or low income. About 80% of consumed potatoes are grown locally and thus depend on each area＇s contamination. Although daily intakes of toxicants do not exceed WHO tolerable levels, their contribution to the total environmentally dependent dose is important. The approach developed by us can be used in epidemiological and risk assessment studies when they are performed on regional or local level.

关键词： Nutrition profiles toxic metals risk assessment.

Assessment of Heavy Metal Exposure in Soils of Ihwrekreka Communities, Delta State, Nigeria

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Journal of Geoscience and Environment Protection 2024年第3期12卷 279-303页

作者： Adedoyin Olubunmi Bankole Akinyemi Olufemi Ogunkeyede Taofik Adewale Adedosu Uche Udeochu Harrison Agboro Efe Jeffery Isukuru Department of Environmental Management and toxicology College of Science Federal University of Petroleum Resources Effurun Delta State Nigeria Department of Chemistry Faculty of Science Ladoke Akintola University Oyo State Nigeria Chemistry Program Division of Science and Mathematics College of Arts and Sciences University of the District of Columbia Washington District of Columbia USA Department of Biology and Environmental Science College of Arts and Sciences University of New Haven West Haven CT USA

Crude oil pollution in the Niger Delta, perpetrated by both local communities and industrial actors, has brought about soil pollution with its consequent ecological, human health and food challenges. The purpose of this research was to examine the concentration and distribution of heavy metals in soil from communities contaminated by crude oil in Niger Delta, and to evaluate the potential health risks to residents from exposure to these contaminants. To achieve this, soil samples were collected from the Ihwrekreka community and analyzed for heavy metal content using inductively coupled plasma mass spectrometry (ICP-MS). The analytical results in mg/kg revealed a significant metals pollution level derived from the oil spill in the soil ranging from 4.85 - 17,078 (Cu), 1.01 - 16.1 (Cd), 0.22 - 36.8 (Cr), 8.28 - 40.9 (Ni), 7.51 - 6474 (Pb), and 8.84 - 12,851 (Zn) respectively. Most of the metals were above the permissible limits of World Health Organization, with Cu, Zn, and Pb as the most contaminating metals. Lead was found to be the main contributor to the hazard index (HI) values for both children and adults in the study area, with its concentration exceeding the permitted limits set by the WHO and the EC. The hazard index (HI) values of Pb, Cu, Zn, Cd, Ni, and Cr were significantly higher than 1. These findings suggest that the release of heavy metals from an oil-contaminated site may pose a risk to human health and the environment.

关键词： Cancer Exposure Pathway toxic metals Health Risks

Investigation of Pb(Ⅱ)bioremediation potential of algae and cyanobacteria strains isolated from polluted water

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Water Science and Engineering 2022年第3期15卷 237-246页

作者： W.G.Madusha Lakmali A.D.Sarangi N.P.Athukorala Keerthi B.Jayasundera Department of Botany Faculty of ScienceUniversity of PeradeniyaPeradeniya 20400Sri Lanka Postgraduate Institute of Science University of PeradeniyaPeradeniya 20400Sri Lanka Department of Chemistry Faculty of ScienceUniversity of RuhunaMatara 81000Sri Lanka

Algae and cyanobacteria are known to be able to remove a variety of pollutants from water,including toxic metal *** this study,algal and cyanobacterial species growing in two polluted water bodies were identified,and the Pb(Ⅱ)removal ability of these isolated species was *** on microscopic observations,27 species were identified,and nine species were isolated as pure ***(Ⅱ)bioremediation of five selected species(Anacystis sp.,Chlorella sp.1,Monoraphidium sp.,Phormidium sp.,and Uronema sp.)was studied in *** mean Pb(Ⅱ)removal abilities varied among these five species:Phormidium sp.>Monoraphidium sp.>Uronema sp.>Chlorella sp.1>Anacystis *** Pb(Ⅱ)tolerance of each species was determined based on the live cell percentage and biofilm formation *** a period of 3 d,Phormidium sp.,Monoraphidium sp.,and Uronema *** nearly 90%of survival,and all five species demonstrated biofilm formation capacities exceeding 50%.Furthermore,the Pb(Ⅱ)removal ability of the five species exhibited a strong positive correlation with the live cell percentage and showed a strong negative correlation with the biofilm formation *** conclusion,Phormidium sp.,Monoraphidium sp.,and Uronema *** high tolerances towards Pb(Ⅱ)and presented high removal ***,these species can be identified as potential sorbents for development of suitable adsorption systems to remove Pb(Ⅱ)from aqueous solutions.

关键词： Algae toxic metals Isolation Bio-removal Biofilm formation

toxic metal enrichment characteristics and sources of arid urban surface soil in Yinchuan City, China

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Journal of Arid Land 2018年第4期10卷 653-662页

作者： ZHANG Mingxin LU Xinwei SHI Dongqi PAN Huiyun Department of Environmental Science School of Geography and Tourism Shaanxi Normal University School of Resource and Environment Ningxia University Institute of Resources and Environment Henan Polytechnic University

To investigate the environmental quality of the urban surface soil in Yinchuan City, the capital of Ningxia Hui Autonomous Region （Ningxia）, China, we sampled surface soil and measured the concentrations of 8 toxic metals （Pb, Cr, Cu, Zn, Co, Bi, Ni and V） using X-ray fluorescence spectrometry. The enrichment characteristics and sources of these toxic metals in the soil were analyzed by the enrichment factor （EF） and multivariate statistical analysis. The results showed that the mean concentrations of these toxic metals in the soil samples were 25.0, 109.1, 16.8, 26.0, 37.2, 2.7, 25.3 and 59.9 mg/kg for Pb, Cr, Cu, Zn, Co, Bi, Ni and V, respectively, which were 1.2, 1.8, 0.8, 0.4, 3.2, 8.7, 0.7 and 0.8 times of the corresponding background values of Ningxia soil, respectively. The variations of Pb, Zn, Co, Bi and Ni concentrations in the surface soil of Yinchuan were larger than those of the other metals. Our results also showed that the toxic metals investigated in the soil had different enrichment levels. Both Co and Bi were significantly enriched, whereas Cr was only moderately enriched in the soil. There was a deficiency or minimal enrichment of the other toxic metals in the soil. Source analysis results based on the concentration, enrichment characteristics and multivariate statistical analysis indicated that Cr, V and Ni originated from a combination of fossil fuel combustion, traffic pollution and natural occurrence. Pb, Cu and Zn were predominantly derived from natural and traffic sources, while Co and Bi primarily originated from construction sources.

关键词： toxic metals urban surface soil enrichment factor arid area Northwest China

Exploring the benefits of biochar over other organic amendments for reducing of metal toxicity in Withania somnifera

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Biochar 2019年第3期1卷 293-307页

作者： Nidhi Nigam Vineet Yadav Puja Khare Raghuvendra Pratap Singh Paurabi Das Karuna Shanker Ram Suresh Sharma Agronomy and Soil Science Division CSIR-Central Institute of Medicinal and Aromatic PlantsP.O.-CIMAPNear Kukrail Picnic SpotLucknow 226015India Analytical Chemistry Division CSIR-Central Institute of Medicinal and Aromatic PlantsLucknow 226015India Technology and Business Development Division CSIR-Central Institute of Medicinal and Aromatic PlantsLucknow 226015India

Biochar is considered as a good metal sequester and ameliorates the metal toxicity and uptake in ***,its effec-tiveness over other organic amendments is not well *** aim of this study is to compare the biochar amendments alleviating the levels of Pb and Cd in Withania somnifera *** with other organic *** manure,vermicom-post,and biochar were applied in the field spiked with highly available Pb and *** bioavailability and accumulation,plant growth and plant physiology,antioxidant enzymes and metabolite content of *** along with soil properties were evaluated in all *** indicates that the application of organic manures significantly alleviated the metal levels(33-72%)in the plant in comparison with *** herbage yield was significantly higher(33-69%)under different organic manures as compared to the metal *** metabolite contents and antioxidant enzymes were higher in metal treatments in comparison with *** manures were not only able to restrain the Pb and Cd in soil but also enhanced the soil microbial *** indicate that biochar amendments were more promising than farmyard manure and vermicompost due to the presence of more stable carbon in biochar and more alleviation in metal *** addition,net profit in the cultivation of *** was higher for biochar amendments(50%higher)compared to *** study recommended that biochar could be a better option for commercial and safer production of ***.

关键词： toxic metals Withania somnifera Biochar Phytotoxicity

Endophytes and their role in phytoremediation

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Fungal Diversity 2012年第3期54卷 11-18页

作者： Hai-Yan Li Da-Qiao Wei Mi Shen Zuo-Ping Zhou Faculty of Life Science and Technology Kunming University of Science and TechnologyKunming 650093China

Many endophytes have been found to be resistant to heavy metals and/or capable of degrading organic contaminants,and endophyte-assisted phytoremediation has been documented as a promising technology for in situ remediation of contaminated *** the phytoremediation of heavy metals,the heavy-metal-resistant endophytes can enhance plant growth,decrease metal phytotoxicity,and affect metal translocation and accumulation in *** the phytoremediation of organic contaminants,endophytes can produce various enzymes to degrade organic contaminants and reduce both the phytotoxicity and evapotranspiration of volatile *** paper reviews the diversity of contaminant-resistant/degrading endophytes and their role in phytoremediation and discusses some issues that have been raised surrounding this area of research.

关键词： Endophyte Remediation toxic metals Organic chemicals Phytohormones metals mobilization

Distribution of heavy metals in water and sediment of an urban river in a developing country:A probabilistic risk assessment

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International Journal of Sediment Research 2022年第2期37卷 173-187页

作者： Mir Mohammad Ali Saima Rahman Md Saiful Islam Md Refat Jahan Rakib Shaharior Hossen Md Zillur Rahman Tapos Kormoker Abubakr M. Idris Khamphe Phoungthong Institute of Disaster Management Khulna University of Engineering and Technology Department of Aquaculture Sher-e-Bangla Agricultural University Department of Urban and Regional Planning Khulna University of Engineering and Technology Department of Soil Science Patuakhali Science and Technology University Department of Fisheries and Marine Science Noakhali Science and Technology University Department of Fisheries Science Chonnam National University Quality Control Chemistry Lab Department of Fisheries Department of Emergency Management Patuakhali Science and Technology University Department of Chemistry College of Science King Khalid University Research Center for Advanced Materials Science (RCAMS) King Khalid University Environmental Assessment and Technology for Hazardous Waste Management Research Center Faculty of Environmental Management Prince of Songkla University

River water and sediment embody environmental characteristics that give valuable eco-environmental *** to rapid industrialization,the aquatic environment of any urban river can be seriously polluted by heavy metals(HMs).The global concern is caused by heavy metal pollution because of its potential harm to aquatic ecosystems and human *** the Bhairab River,Bangladesh,surface sediment concentrations of globally alarming toxic metals such as arsenic(As),chromium(Cr),cadmium(Cd),and lead(Pb) were measured to determine the ecological and human health risks of the riverine *** average As,Cr,Cd,and Pb concentrations in water were 3.55,31.74,1.44,and23.82 μg/L,respectively,and in sediment were 4.13,34.17,1.66,and 25.46 mg/kg,*** the winter,metals in sediment were higher than during the *** most sediment samples,the enrichment factor(EF),contamination factor(CF),geoaccumulation index(I),pollution load index(PLI) of As,Cr,Cd,and Pb indicated moderate *** potential ecological risk(PER) in sediment followed the descending order of Cd> As> Pb> *** contamination level of toxic metals implied that the condition is frightening and probably severely affecting the aquatic ecology of this riverine ecosystem.

关键词： toxic metals Environmental risk Bioaccumulation Ecological risk Bangladesh