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Arsenic plant

Iván Funes Pinter, M Victoria Salomon, Raúl Gil, Leandro Mastrantonio, Rubén Bottini, Patricia Piccoli
Contamination by trace elements (TE) is an increasing concern worldwide. In some areas, crop production could be limited by the presence of metals and metalloids, so it is important to determine their concentrations and mobility. The region of Jáchal, province of San Juan, Argentina, has good growing conditions for onion and grapevine production, but their quality and yield are affected by high TE concentration in soils and water. Soils, water, grapevine and onion were sampled and TE content determined. In soils elevated As, B, Cr, Hg, and Tl concentrations were detected (506±46, 149±3, 2714±217, 16±7, and 12±3μgg(-1), respectively, for maximum values measured), and physicochemical properties of the soil promotes these elements mobility...
September 16, 2017: Science of the Total Environment
M Tanvir A Chowdhury, Claire M Deacon, Emma Steel, S M Imamul Huq, Graeme I Paton, Adam H Price, Paul N Williams, Andrew A Meharg, Gareth J Norton
Rice plants grown on soils with elevated arsenic have been shown to have increased arsenic content in their grains. To gain a better understanding of the likelihood of high grain arsenic in rice grown in different soils, it is important to understand the factors affecting the bioavailability and mobility of arsenic. Paddy soils from six different physiographic regions of Bangladesh were collected, and diffusive gradients in thin-films (DGT) were used to assess the porewater and solid phase arsenic. While significant differences were identified in total soil arsenic (1...
September 8, 2017: Science of the Total Environment
Waqas Azeem, Muhammad Ashraf, Sher Muhammad Shahzad, Muhammad Imtiaz, Mumtaz Akhtar, Muhammad Shahid Rizwan
Relations between phosphate and arsenate are important but inconsistent to influence arsenic (As) phytotoxicity depending on many plant and soil factors. Present research aimed to investigate the phosphate and arsenate interactions in sunflower (Helianthus annuus L.) grown in alkaline calcareous soil for 18 weeks under natural environmental conditions at three arsenate [0 (As0), 40 (As40), and 80 (As80) mg As kg(-1) soil as sodium arsenate] and three phosphate [0 (P0), 100 (P100), and 200 (P200) mg P2O5 kg(-1) soil as diammonium phosphate] levels...
September 10, 2017: Environmental Science and Pollution Research International
Erik S J Gontijo, Cláudia H Watanabe, Adnívia S C Monteiro, Gilmare A da Silva, Hubert M P Roeser, Andre H Rosa, Kurt Friese
Humic substances (HS) are ubiquitous organic compounds able to affect mobility and availability of arsenic (As) in aquatic systems. Although it is known that associations between HS and As occur mainly via iron (Fe)-cationic bridges, the behaviour and distribution of this metalloid in HS- and Fe-rich environments is still not fully understood. In this paper, the quality of HS from different rivers in Brazil and Germany and its influence on the behaviour of As(V) under different Fe(III) concentrations were investigated...
August 29, 2017: Chemosphere
Shusi Liu, Yixin Lu, Chen Yang, Chuanping Liu, Lin Ma, Zhi Dang
Biochar was carbon-rich and generated by high-temperature pyrolysis of biomass under oxygen-limited conditions. Due to the limitations of surface functional groups and the weakness of surface activity in the field of environmental remediation, the raw biochar frequently was chemically modified to improve its properties with a new performance. In this study, a kind of high-efficiency and low-cost amino biochar modified by nano zero-valent iron (ABC/NZVI) was synthesized and applied to paddy soil contaminated with arsenic (As)...
September 2, 2017: Environmental Science and Pollution Research International
Xu Wang, Anjing Geng, Yan Dong, Chongyun Fu, Hanmin Li, Yarong Zhao, Qing X Li, Fuhua Wang
Arsenic (As) is ubiquitously present in the environment. The toxicity of As is related to its forms. This study was designed to compare the translocation and transformation of four As species from soil to rice, and metabolism in rats for four arsenic species. A set of 26550 data was obtained from pot experiments of rice plants grown in soil fortified with four As species and 4050 data were obtained from experiments of 81 rats administered with the four As species. The concentration of total As in grain from the methyl arsenate fortified soil was 6...
September 1, 2017: Journal of Agricultural and Food Chemistry
Roberta Mercorio, Matteo Bonzini, Laura Angelici, Simona Iodice, Serena Delbue, Jacopo Mariani, Pietro Apostoli, Angela Cecilia Pesatori, Valentina Bollati
BACKGROUND: Inhaled particles have been shown to produce systemic changes in DNA methylation. Global hypomethylation has been associated to viral sequence reactivation, possibly linked to the activation of pro-inflammatory pathways occurring after exposure. This observation provides a rationale to investigate viral sequence (both exogenous and endogenous) methylation in association to metal-rich particulate matter exposure. To verify this hypothesis, we chose the Wp promoter of the Epstein-Barr Virus (EBV-Wp) and the promoter of the human-endogenous-retrovirus w (HERV-w), respectively as a paradigm of an exogenous and an endogenous retroviral sequence, to be investigated by bisulfite PCR Pyrosequencing...
August 28, 2017: Environmental Research
Zheyun Zhang, Hee Sun Moon, Satish C B Myneni, Peter R Jaffé
Although abiotic process of competitive sorption between phosphate (P) and arsenate (As(V)), especially onto iron oxides, are well understood, P-mediated biotic processes of Fe and As redox transformation contributing to As mobilization and speciation in wetlands remain poorly defined. To gain new insights into the effects of P on As mobility, speciation, and bioavailability in wetlands, well-controlled greenhouse experiments were conducted. As expected, increased P levels contributed to more As desorption, but more interestingly the interactions between P and wetland plants played a synergistic role in the microbially-mediated As mobilization and enhanced As uptake by plants...
August 21, 2017: Chemosphere
P Abad-Valle, E Álvarez-Ayuso, A Murciego, L M Muñoz-Centeno, P Alonso-Rojo, P Villar-Alonso
Former mine exploitations entail a serious threat to surrounding ecosystems as after closure of mining activities their unmanaged wastes can be a continuous source of toxic trace elements. Quite often these mine sites are found within agricultural farming areas, involving serious hazards as regards product (feed/food) quality. In this work a grazing land impacted by the abandoned mine exploitation of an arsenical deposit was studied so as to evaluate the fate of arsenic (As) and other trace elements and the potential risks involved...
August 25, 2017: Ecotoxicology and Environmental Safety
Shiv Bolan, Anitha Kunhikrishnan, Balaji Seshadri, Girish Choppala, Ravi Naidu, Nanthi S Bolan, Yong Sik Ok, Ming Zhang, Chun-Guang Li, Feng Li, Barry Noller, Mary Beth Kirkham
The last few decades have seen the rise of alternative medical approaches including the use of herbal supplements, natural products, and traditional medicines, which are collectively known as 'Complementary medicines'. However, there are increasing concerns on the safety and health benefits of these medicines. One of the main hazards with the use of complementary medicines is the presence of heavy metal(loid)s such as arsenic (As), cadmium (Cd), lead (Pb), and mercury (Hg). This review deals with the characteristics of complementary medicines in terms of heavy metal(loid)s sources, distribution, bioavailability, toxicity, and human risk assessment...
August 23, 2017: Environment International
Lina Lin, Minling Gao, Weiwen Qiu, Di Wang, Qing Huang, Zhengguo Song
The effects of biochar (BC) and ferromanganese oxide biochar composites (FMBC1 and FMBC2) on As (Arsenic) accumulation in rice were determined using a pot experiment. Treatments with BC or FMBC improved the dry weights of rice roots, stems, leaves, and grains in soils containing different As contamination levels. Compared to BC treatment, FMBC treatments significantly reduced As accumulation in different parts of the rice plants (P < 0.05), and FMBC2 performed better than FMBC1 did. Furthermore, exposure to 2% FMBC2 decreased the total As concentration in the grain by 68...
August 22, 2017: Environmental Pollution
Bianca S Pinheiro, Luana L Gimenes, Ailton J Moreira, André F de Araújo, Carolina D Freschi, Gian Paulo Giovanni Freschi
This work presents an alternative method for arsenic speciation using the nano-TiO2 hydride generation photocatalytic hydride generation (PCHG) system, which is easily separated from the medium. Nano-TiO2 was studied as photocatalyst to reduction of arsenic species by UV-induced with formic acid and atomic absorption detection of different forms of arsenic [As (III), As (V), dimethylarsinic acid (DMA)] in environmental samples (water, sediment and plant). The effect of the average pH, the organic acid concentration, the ultraviolet irradiation time and their amount were investigated...
August 25, 2017: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
Yanshan Chen, Chen-Yu Hua, Meng-Ru Jia, Jing-Wei Fu, Xue Liu, Yong-He Han, Yungen Liu, Bala Rathinasabapathi, Yue Cao, Lena Q Ma
Arsenic (As) is a toxic carcinogen so it is crucial to decrease As accumulation in crops to reduce its risk to human health. Arsenite (AsIII) antiporter ACR3 protein is critical for As metabolism in organisms, but it is lost in flowering plants. Here, a novel ACR3 gene from As-hyperaccumulator Pteris vittata, PvACR3;1, was cloned and expressed in Saccharomyces cerevisiae (yeast), Arabidopsis thaliana (model plant), and Nicotiana tabacum (tobacco). Yeast experiments showed that PvACR3;1 functioned as an AsIII-antiporter to mediate AsIII efflux to an external medium...
September 7, 2017: Environmental Science & Technology
Navin Kumar, Arvind Kumar Dubey, Atul Kumar Upadhyay, Ambedkar Gautam, Ruma Ranjan, Saripella Srikishna, Nayan Sahu, Soumit Kumar Behera, Shekhar Mallick
GABA counteracts wide range of stresses through regulation of GABA shunt pathway in plants. Although, GABA assisted tolerance against As toxicity in plants is still unexplored. We have examined GABA induced tolerance in rice seedlings with two exposure periods of GABA i.e., short term and long term. Results showed that accumulation of GABA reduced the expressions of Lsi-1 and Lsi-2 transporter genes, which ultimately decreased the accumulation of As in rice seedlings. The accumulation of GABA also modulated the gene expression of GABA shunt pathway and activity of antioxidant enzymes, which strongly induced the tolerance in plants...
August 18, 2017: Scientific Reports
Jieyu Liu, Peiyu Jin, Shengnan Liu, Fei Wang, Xiaoyan Wang, Li Yang, Shuhua Xi
Inorganic arsenic (iAs) is a carcinogen and could increase the risks of bladder, lung, and skin cancer. Mining and smelting of non-ferrous metals are common occupational arsenic exposures. In this study, 125 individuals working in non-ferrous metal smelting plants were separated into two groups according to urinary total arsenic (TAs) levels: group 1, TAs < 100 μg/g Cr; group 2, TAs ≥ 100 μg/g Cr. Demographic characteristics of participants were obtained by questionnaire interview. Levels of E-cadherin soluble ectodomain fragment (sEcad) and epidermal growth factor (EGF) in workers urine were determined by ELISA test...
August 17, 2017: Biological Trace Element Research
Noor Nahar, Aminur Rahman, Neelu N Nawani, Sibdas Ghosh, Abul Mandal
We have cloned, characterized and transformed the AtACR2 gene (arsenic reductase 2) of Arabidopsis thaliana into the genome of tobacco (Nicotiana tabacum, var Sumsun). Our results revealed that the transgenic tobacco plants are more tolerant to arsenic than the wild type ones. These plants can grow on culture medium containing 200μM arsenate, whereas the wild type can barely survive under this condition. Furthermore, when exposed to 100μM arsenate for 35days the amount of arsenic accumulated in the shoots of transgenic plants was significantly lower (28μg/g d wt...
August 4, 2017: Journal of Plant Physiology
Yanli Liu, Rebecca Njeri Damaris, Pingfang Yang
A DRT protein was identified and proved to be involved in the poplar arsenic resistance through comparative proteomics analysis between arsenic sensitive and resistant cultivars. Arsenic pollution in soil has been a serious problem all over the world. It is very important to dissect plants arsenic stress-response mechanisms in phytoremediation. In this study, arsenate-tolerant Populus deltoides cv. 'zhonglin 2025' and arsenate-sensitive Populus × euramericana cv. 'I-45/51' were screened from 10 poplar varieties...
August 16, 2017: Plant Cell Reports
Tahereh Mansouri, Ahmad Golchin, Hossein Kouhestani
Soil pollution by arsenic increases the potential risk of arsenic entrance into the food chain. The usefulness of maleic anhydride- styrene- acrylic acid copolymer on the mobility and phytoavailability of arsenic was evaluated. Treatments were the concentrations of acrylic copolymer (0, 0.05, 0.10, and 0.20% w/w) and the concentrations of soil total arsenic (0, 6, 12, 24, 48, and 96 mg kg(-1)). Sodium arsenate was added in appropriate amounts to subsamples of an uncontaminated soil to give contaminated soils with different levels of arsenic...
August 13, 2017: Environmental Monitoring and Assessment
Meri Barbafieri, Francesca Pedron, Gianniantonio Petruzzelli, Irene Rosellini, Elisabetta Franchi, Roberto Bagatin, Marco Vocciante
The removal of contaminants from an earthy matrix by phytoremediation requires the selection of appropriate plant species and a suitable strategy to be effective. In order to set up an assisted phytoremediation intervention related to a disused industrial site affected by an arsenic and lead complex contamination, an extensive experimental investigation on micro and mesocosm scale has been conducted. Particular attention was given to the choice of plant species: using crop plants (Lupinus albus, Helianthus annuus and Brassica juncea) a series of parallel test campaigns have been realized to investigate different scenarios for the reclamation...
August 10, 2017: Journal of Environmental Management
Jing Liu, Birendra Dhungana, George P Cobb
Copper oxide nanoparticles (nCuO) are widely used in many industries. The increasing release of nCuO from both intentional and unintentional sources into the environment may pose risks to rice plants, thereby reducing the quality or quantity of this staple grain in the human diet. Arsenic (As) contamination has not only decreased rice yield, As accumulation in rice has also been a great human health concern for a few decades. New technologies have succeeded in removing As from water by nanomaterials. By all accounts, few studies address nCuO phytotoxicity to rice, and the interactions of nCuO with As are poorly described...
August 10, 2017: Environmental Toxicology and Chemistry
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