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Effect of inorganic arsenic in paddy soil on the migration and transformation of selenium species in rice plants

Journal of Environmental Sciences 2024年第9期143卷 35-46页

作者： Ganga Raj Pokhrel Kaiteng Wang Kaiyang Ying Yongchen Wu Ze Wang Xi Zhu Can Qu Hong Li Fengfu Fu Guidi Yang Fujian Provincial Key Laboratory of Agroecological Processing and Safety Monitoring Key Laboratory for Medicinal Plant Chemistry and Chemical BiologyCollege of JunCao Science and EcologyFujian Agriculture and Forestry UniversityFuzhou 350002China Department of Chemistry Birendra Multiple CampusTribhuvan UniversityChitwan 00977-44200BharatpurNepal Key Laboratory for Analytical Science of Food Safety and Biology of Ministry of Education Fujian Provincial Key Lab of Analysis and Detection for Food SafetyCollege of ChemistryFuzhou UniversityFuzhou 350116China

Selenium(Se)in paddy rice is one of the significant sources of human Se ***,the effect of arsenic(As)pollution in soil on the translocation of Se species in rice plants is *** this research,a pot experiment was designed to examine the effect of the addition of 50 mg As/kg soil as arsenite or arsenate on the migration of Se species from soil to indica Minghui 63 and *** results showed that the antagonism between inorganic As and Se was closely related to the rice cultivar and Se oxidation state in *** to the standalone selenate treatment,arsenite significantly(p<0.05)decreased the accumulation of selenocystine,selenomethionine and selenate in the roots,stems,sheaths,leaves,brans and kernels of both cultivars by 21.4%-100.0%,40.0%-100.0%,41.0%-100%,5.4%-96.3%,11.3%-100.0% and 26.2%-39.7% respectively,except for selenocystine in the kernels of indica Minghui 63 and selenomethionine in the leaves of indica Minghui 63 and the stems of indica *** also decreased(p<0.05)the accumulation of selenocystine,selenomethionine and selenate in the roots,stems,brans and kernels of both cultivars by 34.9%-100.0%,30.2%-100.0%,11.3%-100.0% and 5.6%-39.6%respectively,except for selenate in the stems of indica Minghui ***,relative to the standalone selenite treatment,arsenite and arsenate decreased(p<0.05)the accumulation of selenocystine,selenomethionine and selenite only in the roots of indica Minghui 63 by 45.5%-100.0%.Our results suggested that arsenite and arsenate had better antagonism toward Se species in selenate-added soil than that in selenite-added soil;moreover,arsenite had a higher inhibiting effect on the accumulation of Se species than arsenate.

关键词： Rice(Oryza sativa L.) inorganic arsenic Selenium species Translocation Antagonistic effect

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inorganic arsenic contamination of rice from Chinese major rice-producing areas and exposure assessment in Chinese population

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Science China Chemistry 2015年第12期58卷 1898-1905页

作者： Xiaowei Li Ke Xie Bing Yue Yunyun Gong Yi Shao Xiaohong Shang Yongning Wu Key Laboratory of Food Safety Risk Assessment Ministry of Health China National Center for Food Safety Risk Assessment 3. Food Science and Engineering Department Wuhan Polytechnic University 4. Institute for Global Food Security School of Biological Sciences Queen's University of Belfast

This study examined the total arsenic(Ast) and inorganic arsenic(Asi) content in the main rice growing area of China. The results were compared with other countries and then used for dietary exposure assessment. A total of 446 rice samples from 15 main rice-growing provinces and autonomous regions of China were collected and then divided into unpolished and polished rice. Total arsenic and arsenic species were analyzed in a total of 892 subsamples using inductively coupled plasma-mass spectrometry(ICP-MS) and high performance liquid chromatography(HPLC) coupled ICP-MS, respectively. National Ast means were 255 μg/kg of unpolished rice and 143 μg/kg of polished rice. Asi was found to be the predominant species and mean levels were 209 μg/kg of unpolished rice and 108 μg/kg of polished rice, respectively. Exposure assessment to Asi in polished rice has been calculated for the margin of exposure(MOE), which highlights the fact that Asi levels in the Chinese rice should arouse public health concern.

关键词： arsenic speciation exposure assessment inorganic arsenic rice

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A critical review of on-site inorganic arsenic screening methods

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Journal of Environmental Sciences 2023年第3期125卷 453-469页

作者： Yi He Jingyu Liu Yanhua Duan Xiaofei Yuan Lulu Ma Ratan Dhar Yan Zheng Department of Sciences John Jay College and the Graduate CenterThe City University of New YorkNY 10019USA State Environmental Protection Key Laboratory of Integrated Surface Water-Groundwater Pollution Control School of Environmental Science and EngineeringSouthern University of Science and TechnologyShenzhen 518055China Guangdong Provincial Key Laboratory of Soil and Groundwater Pollution Control School of Environmental Science and EngineeringSouthern University of Science and TechnologyShenzhen 518055China Queensland Alliance for Environmental Health Sciences(QAEHS) The University of QueenslandQLD 4102Australia Department of Earth and Physical Sciences York CollegeThe City University of New YorkNY 11451USA

Approximately 94 to 220 million people worldwide are at risk of drinking well water containing arsenic > 10 μg/L, the WHO guideline value. To identify non-compliant domestic wells, assess health risks and reduce exposure, accurate and rapid on-site inorganic arsenic screening methods are desirable because all domestic wells worldwide need to be ***, the principles, advantages and limitations of commonly used colorimetry, electrochemistry, and biosensing methods are critically reviewed, with the performance compared with laboratory-based benchmark methods. Most commercial kits are based on the classic Gutzeit reaction. Despite being semi-quantitative, the more recent and more expensive products display improved and acceptable accuracy and shorter testing time (~10 min). Carried out by trained professionals, electrochemical methods are also feasible for on-site analysis, although miniaturization is desirable yet challenging. Biosensing using whole bacterial cells or bio-engineered materials such as aptamers is promising, if incorporated with function specific nanomaterials and biomaterials. Since arsenic is frequently found as arsenite in reducing groundwater and subject to oxidation during sampling, transportation and storage, on-site separation and sample preservation are feasible but the specific methods should be chosen based on sample matrix and tested before use. To eliminate arsenic exposure among hundreds of millions of mostly rural residents worldwide, we call for concerted efforts in research community and regulatory authority to develop accurate, rapid, and affordable tests for on-site screening and monitoring of arsenic in drinking water. Access to affordable testing will benefit people who are socioeconomically disadvantaged.

关键词： inorganic arsenic On-site analysis Drinking water Groundwater Field test

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Synthesis of a Novel Imidazole Ionic Liquid Modified Mesoporous Silica SBA15 for Selective Separation and Determination of inorganic arsenic in Rice

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Chinese Journal of Structural Chemistry 2018年第12期37卷 2024-2035,1848页

作者： CHEN Tuan-Wei ZHEN Wen-Bo YAN Zhi-Ming LIN He-Tong CHEN Guo-Ying CHEN Shao-Jun College of Food Science Fujian Agriculture and Forestry University United States Department of Agriculture Agricultural Research Service Eastern Regional Research Center

A novel 1-methylimidazole ionic liquid modified SBA15 mesoporous silica(1-MIIL@SBA15) was synthesized and applied to selective separation of inorganic arsenic(iAs) in rice by dispersive solid phase extraction(DSPE), followed by hydride generation-atomic fluorescence spectrometric(HG-AFS) quantification. The prepared sorbent was characterized by FTIR, FESEM, BET and Zeta potential. Key parameters of adsorption and desorption in DSPE were optimized using standard reference material 1568 b rice flour. Under optimal conditions, the limit of detection was 8.776 ng/kg, relative standard deviation was ≤2.0%, and recoveries of iAs were in the 92.3～94.4% range. This method was successfully applied to the determination of iAs in rice. Under acidic condition, the electrostatic interaction between the positively charged 1-MIIL@SBA15 and anionic iAs played an important role in selective iAs separation, rendering this method suitable for iAs analysis.

关键词： SBA15 ionic liquid inorganic arsenic dispersive solid phase extraction hydride generation-atomic fluorescence spectrometric(HG-AFS)

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Physiological traits of rice seedlings in response to inorganic arsenic

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Journal of Agricultural Science and Technology 2009年第12期3卷 9-15,18页

作者： WANG Hai-bin TABG Gui-di LIN Zhi-hua CHEN Rong-shan LIU Chang-hui HE Hai-bin LIN Wen-xiong School of Life Sciences/Agroecological Institute Fujian Agriculture and Forestry University Fuzhou 350002 China Key Laboratory of Biopestieide and Chemical Biology Ministry of Education Fuzhou 350002 China

The aim of our study was to better understand the different responses of rice seedling to different species of inorganic arsenic As203 （As（Ill）） and Na2HAsO4 （As（V））. Our results indicate that the biomass of rice seedling decreased as arsenic concentration increased, with the decrease being more significant at higher arsenic concentrations. In addition, the analysis of superoxide dimutase （SOD）, peroxidase （POD）, and catalase （CAT） in rice roots and leaves showed that the activity of these three enzymes significantly decreased in rice tissues, especially in rice roots, as arsenic concentration was increased,. Further, the uptake and utilization efficiencies of N, P, and K were found to decrease as arsenic concentration was increased. However, the uptake and utilization efficiencies of P and K were mainly affected by As（IlI）, whereas those of N were mainly affected by As（V）. Inductively coupled plasma-mass spectrometry （ICP-MS） was used to assay arsenic accumulation in rice tissues; the results indicate that the arsenic content in rice tissues was enhanced when arsenic concentration was increased, especially in rice roots after arsenic treatment.

关键词： inorganic arsenic Rice(Oryza satica L.) physiological traits nutrition

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Influence of Iron on the Distribution of inorganic arsenic Species in Groundwater Samples

Influence of Iron on the Distribution of Inorganic Arsenic S...

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International Conference on Artificial Intelligence and Embedded Systems(ICAIES’2012);International Conference on Trends in Electrical,Electronics and Power Engineering(ICTEEP2012);International Conference on Thermal,Material and Mechanical Engineering(ICTMME’2012);International Conference on Advances in Biological and Medical Sciences(ICABMS’2012);International Conference on Chemical Processes and Environmental Issues(ICCEEI’2012);International Conference on Law,Humanities and Management(ICLHM’2012)

作者： Sheng-Wei Wang Chen-Wuing Liu Agricultural Engineering Research Center National Taiwan University

The distribution of inorganic arsenic （As） species in groundwater sample, including As（Ⅲ） and As（Ⅴ）, requires adequate preservation to prevent the adsorption caused by precipitates of Fe oxyhydroxides. Twenty-two groundwater samples with varied As and Fe concentrations were collected from high-As catchments in Taiwan. After filtration of samples in the field, inorganic As species were immediately preserved by adding EDTA/acetate acid. The effectiveness of EDTA was also assessed by long-term experiment to determine the representative preservation method of inorganic As species in groundwater samples. Analytical results showed that the oxidation of Fe（Ⅱ） rapidly forms Fe oxyhydroxides in controlled samples, causing the adsorption and/or co-precipitation of inorganic As and the decrease of aqueous As concentrations. EDTA/acetate acid can effectively slow the rate of As（Ⅲ） oxidation and eliminates the precipitation of Fe and As, especially for high-Fe （＞6.45 mg/L） groundwater samples. However, for low-Fe groundwater, other preservation methods should be considered, such as the phosphoric acid and hydrochloric acid. For long-term experiment, the EDTA/acetic acid preservation stabilize the distribution of inorganic As species of groundwater samples within 6 months.

关键词： Groundwater inorganic arsenic Iron Preservation

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Effect of Silicon on arsenic Concentration and Speciation in Different Rice Tissues

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Pedosphere 2018年第3期28卷 511-520页

作者： LI Gang ZHENG Maozhong TANG Jianfeng SHIM Hojae CAI Chao Key Lab of Urban Environment and Health Institute of Urban Environment Chinese Academy of Sciences Xiamen 361021(China) Ningbo Urban Environment Observatory and Monitoring Station Ningbo 315830( China) College of Ecology and Resource Engineering Wuyi University Wuyishan 354300( China) University of Macao Taipa Macao SAR( China)

Rice is a major source of inorganic arsenic(As) exposure for billions of people worldwide. Therefore, strategies to reduce As accumulation in rice should be adopted. Silicon(Si) application can effectively mitigate As accumulation in rice. In this study, a pot experiment was performed to investigate the effect of Si on As speciation and distribution in different rice tissues. The results showed that Si addition significantly increased As and Si concentrations in soil solution and Si concentration in iron plaque formed around rice root surface, whereas As in the iron plaque was significantly decreased. Total As concentrations in the stem, leaf, husk, and brown rice were remarkably decreased by 51.9%, 31.9%, 33.8%, and 24.1%, respectively, after Si addition, and inorganic As concentrations were reduced by 52.3%, 35.5%, 50.1%, and 20.1%, respectively. Moreover, both dimethylarsinic acid concentration and percentage in rice grain were significantly elevated by Si application. Therefore, Si application is promising as a way to mitigate inorganic As accumulation in rice and to reduce consumer health risk.

关键词： arsenic accumulation contamination dimethylarsinic acid health risk inorganic arsenic iron plaque rice grain root surface

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Ferrate Oxidation of Phenylarsonic Acid Compounds

Ferrate Oxidation of Phenylarsonic Acid Compounds

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中国化学会第十届全国无机化学学术会议

作者： X.Xie Y.Li H.Cheng College of Urban and Environmental Sciences Peking University

Ferrate, iron in its hexavalent oxidation state（Fe（VI））, is recognized as a powerful and green oxidizing agent, and has been applied for the treatment of many pollutants. Under acidic conditions, the redox potential of Fe（VI） ion is higher than most of the commonly used oxidants, such as ozone and permanganate.1 Unlike most organic pollutants of concern, degradation of phenylarsonic acid compounds, primarily p-arsanilic acid（p-ASA） and roxarsone（ROX）, which have been used intensively as feed additives in swine and poultry production worldwide, releases more mobile and toxic inorganic arsenic species(As（III） and As（V）. There is a significant need for a simple and fast method to eliminate the risk posed by these compounds. To this end, ferrate oxidation was investigated for fast destruction of p-ASA/ROX, while the As（V） released was captured by the in situ formed Fe（III） oxide-hydroxide in the reaction system.2 Kinetics for the oxidation of p-ASA and ROX by ferrate was investigated, and the corresponding pH-dependent second-order rate constants were estimated based on experimental measurements. The degradation pathways of p-ASA/ROX were delineated based on the major degradation products identified, and the chemical stability of the precipitate separated from the solution phase was also assessed. The conditions of ferrate oxidation for degradation of p-ASA/ROX and removal of the released As（V） in swine manure leachate were optimized, and the influence of major matrix species was evaluated. Self-decomposition of ferrate under acidic conditions is a major drawback for ferrate oxidation,3 which not only increases chemical consumption, but also generates unnecessary amount of Fe（III） oxide-hydroxide sludge. Thus, several strategies were also explored to maximize the use efficiency of ferrate and reduce the overall treatment cost.

关键词： ferrate phenylarsonic acid compound inorganic arsenic Fe(III) oxide-hydroxide oxidation sorption

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