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Interactive Effects of Lead and Bensulfuron-Methyl on Decomposition of ^(14)C-Glucose in Paddy Soils

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Pedosphere 2009年第5期19卷 577-587页

作者： HOU Xian-Wen WU Jian-Jun XU Jian-Ming TANG Cai-Xian Institute of Soil and Water Resources and Environmental Science Zhejiang Provincial Key Laboratory of SubtropicalSoil and Plant Nutrition Zhejiang University Hangzhou 310029 （China） Institute of Environmental and Plant Protection Chinese Academy of Tropical Agricultural Sciences Danzhou 571737（China） Department of Agricultural Sciences La Trobe University Victoria 3086 （Australia）

Little information is available on the interactive effects of inorganic and organic pollutants on carbon utilization by soil *** study examined the effects of two common soil pollutants,lead(Pb) and bensulfuron-methyl herbicide(BSM),on decomposition of an adscititious carbon source(14C-glucose).Two contrasting paddy soils,a silty clay soil and a clay loam soil,were incubated with different concentrations and combinations of pollutants for 60 *** rotatable central composite design was adopted to design the combinations of the pollutant concentrations so that rate response curves could be *** decomposition of 14C-glucose occurred in the first three days for both soils where no Pb or BSM was added(control).Overall,63%-64% of the added 14C-glucose was decomposed in the control over the 60-day *** addition of Pb or BSM significantly decreased the decomposition of 14C-glucose during the first week but increased the decomposition thereafter;as a result,the percentages of 14C-glucose decomposed(57%-77%) over the 60-day period were similar to or higher than those of the *** of the pollutants in combination did not further inhibit decomposition compared with the ***,decomposition rates were lower in the silty clay soil than in the clay loam soil,which was related to the soil texture,cation exchange capacity,and *** relationship between the decomposition rates and the pollutants could be well characterized by the quadratic regression orthogonal rotation *** initial antagonistic effects of the pollutants followed by the synergistic effects on microbial activity might result from changes of the concentrations of the pollutants.

关键词： carbon source compound pollution herbicide microbial activity

Trichoderma viride F7 improves peanut performances while remediating cadmium-contaminated soil with microplastics

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Pedosphere 2024年第5期34卷 971-980页

作者： Xin SONG Jianpeng JIN Hongliang YIN Tingjuan WANG Haiying ZONG Fangli WANG Jun LIU Xiaoli HUANG Bin WANG Chao CHAI Zhi LI Dongsheng LIU Xuexia WANG Ningning SONG School of Resources and Environment Qingdao Agricultural UniversityQingdao 266109China Central Laboratory Qingdao Agricultural UniversityQingdao 266109China Institute of Soil Fertilizer and Agricultural Water Saving Xinjiang Academy of Agricultural SciencesÜrümqi 830091China Institute of Plant Nutrition and Resources Beijing Agricultural Forestry Academy SciencesBeijing 100097China

Microplastics(MPs)and cadmium(Cd)in soil have serious negative impacts on plant *** a bioremediator,Trichoderma viride may modulate the impacts of MPs and/or Cd on plant growth and heavy metal *** this study,*** F7 was used to treat Cd-contaminated soil with and without the presence of polylactic acid MPs to investigate its effects on peanut growth,Cd uptake efficiency,and soil *** showed that F7 increased soil pH,dissolved organic carbon,cation exchange capacity,microbial biomass nitrogen,and microbial biomass carbon,which resulted in increases of 2.10%-19.83%in peanut biomass and mitigated the negative effects of MPs and Cd on peanut *** viride F7 reduced the soil bioavailable Cd and plant Cd concentrations by 16.68%-34.20%and 5.37%-25.84%,*** path analysis showed that F7 could improve peanut performances by altering soil properties and reducing peanut Cd concentrations in MP-Cd-contaminated *** fungal community analysis indicated that the microbial community was altered via F7 inoculation,which antagonized Fusarium and promoted peanut *** study reveals the mechanisms of F7 in mitigating Cd contamination in the soil with the presence of MPs,which provides new ideas for managing MP-heavy metal-contaminated soil and improving soil health.

关键词： bioremediation compound pollution emerging pollutant heavy metal polyethylene soil health

Review on the Effects of Combined pollution of Lead and Chromium on Soil Microorganisms and Treatment Methods

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Journal of Geoscience and Environment Protection 2020年第9期8卷 140-150页

作者： Guangyao Yang Hongsheng Wu Xiaoling Ma Yujie Tang Jia Li Yao Chai Chaomin Wang Haichao Yang Department of Agricultural Resources and Environment School of Applied Meteorology Nanjing University of Information Science and Technology Nanjing China

Heavy metals—Pb and Cr are important causes of environmental pollution, and they often coexist in nature. At present, the effects of Pb and Cr toxicity on soil microorganisms have been less studied, in soil environment which is extremely complex. Simulating soil environment and studying microbial reaction under various heavy metal conditions are of great significance for revealing microbial tolerance to heavy metals. In this paper, firstly, the related concepts of soil rechecking pollution are discussed, and the physical and chemical properties and forms of lead and chromium are introduced accordingly. Secondly, the effects of combined pollution of lead and chromium on soil microbial biomass, soil microbial community structure and soil microbial activity were discussed. Finally, the relevant treatment methods of heavy metal contaminated soil were put forward.

关键词： compound pollution Heavy Metals Soil Microorganisms

Studies on Heavy Metal pollution in Soil-Plant System:A Review

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Forestry Studies in China 2003年第1期5卷 55-62页

作者： Wang Haiyan Sun XiangyangCollege of Soil and Water Conservation, Beijing Forestry University, Beijing 100083, P.R. China College of Soil and Water Conservation Beijing Forestry University Beijing 100083 P.R. China

Heavy metal pollution in soil-plant system is of major environmental concern on a world scale and in China in particular with the rapid development of industry. The heavy metal pollution status in soil-plant system in China, the research progress on the bioavailability of heavy metals (affecting factors, extraction methods, free-ion activity model, adsorption model, multivariate regression model, Q-I relationship, and compound pollution), and soil remediation are reviewed in the paper. Future research and monitoring is also discussed.

关键词： heavy metal pollution soil-plant system bioavailability free-ion activity model adsorption model multivariate regression model compound pollution soil remediation

Effect of Polyethylene (LDPE) Microplastic on Remediation of Cadmium Contaminated Soil by <i>Solanum nigrum</i>L.

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Journal of Geoscience and Environment Protection 2022年第1期10卷 49-64页

作者： Jiying Zou Chenyu Wang Jianwei Li Jia Wei Ying Liu Liangyu Hu Hui Liu Hongfeng Bian Dazhi Sun College of Resource and Environmental Engineering Jilin Institute of Chemical Technology Jilin China College of Land Science and Technology China Agricultural University Beijing China School of Environment Northeast Normal University Changchun China Yangtze River Shipping Public Security Bureau Wuhan China

Solanum nigrum L. has a delightful prospect as a hyperaccumulation plant for cadmium pollution remediation, and microplastic is a new type of pollution that has received wide attention. In this study, the effects of polyethylene microplastics (LDPE) (0.135, 0.27, 0.81 and 1.35 mg·kg-1) and cadmium (20 mg·kg-1) on the growth indexes and soil physical and chemical properties of Solanum nigrum L. were investigated in a 17-day microcosm experiment. The results showed that single LDPE contamination showed a trend of low concentration promotion and medium-high concentration inhibited the growth index of Solanum nigrum L. and soil physicochemical index, and single Cd contamination was more stressful to plants than single LDPE contamination, while low concentration of LDPE could reduce the effect of Cd on soil physical and chemical properties and promote plant growth and uptake of soil nutrients. These findings suggest that high concentrations of microplastics can inhibit the growth of Solanum nigrum L. alone or in combination with Cd, rather than reducing the toxicity of Cd.

关键词： Microplastics Heavy Metal compound pollution Phytoremediation Solanum nigrum L.

Fixation of Multiple Metals in Contaminated Soil by Different Passivators

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Agricultural Science & Technology 2018年第6期19卷 24-30页

作者： WANG Hui XU Chao OUYANG Dong-sheng WANG Shuai LV Guang-hui LUO Zun-chang LIAO Yu-lin ZHU Han-hua Key Laboratory for Agro-ecological Processes in Subtropical Regions Institute of Subtropical Agriculture Chinese Academy ofSciences Changsha 410125 PRC College of Resources and Environment Hunan Agricultural University Changsha 410128 PRC College of Resources and Environment South China Agricultural University Guangzhou 510642 PRC College of Resources and Environment Sciences Hunan Normal University Changsha 410006 PRC Hunan Soil and Fertilizer Research Institute Changsha 410125 PRC

The effects of 4 passivators, zeolite, lime, red mud and peanut shell biochar, on the fixation of Cd, Pb, Cu and Zn in acidic multi-metal contaminated soils were studied by passivator culture experiment in order to screen out the passivator with better fixation effects. The results showed that the soil pH values of zeolite, lime, red mud and peanut shell biochar increased significantly by 0.511.02, 0.821.29, 0.720.89 and 0.300.35 respectively. The effects of 4 passivators on the fixation of Cd and Zn in soil are lime>red mud>zeolite>peanut shell biochar. The order of effects on the fixation of Pb is red mud>lime>zeolite>peanut shell biochar. The order of the fixation effects of Cu is red mud>lime>peanut shell carbon>zeolite. The contents of Cd, Pb, Cu and Zn in the extractable state of CaCl2 decreased with the increase in the dosage of 4 passivators. Lime and red mud showed good fixation effects on Cd, Pb, Cu and Zn. The contents of Cd, Pb, Cu and Zn in the extractable state of CaCl2 at the low dosage(2.5 g/kg) of lime and red mud decreased by 41%, 84%, 76% and 83% respectively. Soil pH value was negatively correlated with CaCl2-Cd, Pb, Cu and Zn(P<0.01). Lime and red mud had significant fixation effects on Cd, Pb, Cu and Zn in acidic multi-metal contaminated soils at low application dosages.

关键词： Effectiveness of heavy metals compound pollution Passivator Chemical fixation