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Arsenic - DOAJ

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Last Updated: 10 September 2022

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Risk Management of Lead and Arsenic Poisoning in Children through Public Participation in Communities near Abandoned Tin Mine, Southern Thailand

The site of an abandoned tin mine in Bannangsta District, southern Thailand, was contaminated by lead and arsenic from the mine tailings, and was contaminated by lead and arsenic. The study was conducted by participatory action research to help the community improve sustainable risk management. The participants were local public health officials, public health volunteers, parents of local children, and local community representatives. The participants were involved in activities relating to risk transfer, education on exposure control, planning of risk management, and implementation of the initiative. Local children's hair fell dramatically after a six-month period of intervention, as and Pb levels in the hair of local children's u2019s decreased sharply. As and Pb exposure among children increased significantly, according to parents. The introduction of local community-based risk management strategies is largely determined by economic stability and cost reduction initiatives.

Source link: https://doaj.org/article/4edb70847f294cdea290d63ef1ddd80e


Role of Natural Wetlands in Arsenic Removal from Arsenic-Contaminated Runoff

This research aims to determine the role of natural wetlands in arsenic removal. As the research area, Phu Lek wetland in Loei Province, Thailand, was chosen. At the wetland outlet, concentrations in the surface water at the wetland inlet was 0. 85 mg L-1 and 0. 05 mg L-1. With an As removal rate of 98 percent, it was found that the As level in water dropped dramatically along its flow path. At the inlet of wetland, the concentration in the sediment was 89. 53-356. 22 mg kg-1, but it gradually decreased downstream as a result of the water flow. As in the different plant species was in the order Diplazium esculentum > Colocasia esculenta > Lasia spinose. Rootlet > rhizome > leaf stalk. In summary, As existing in the surface water could be effectively removed by the wetland process.

Source link: https://doaj.org/article/63edc06a2bd441b783843e32f27e528f


Arsenic occurrence in the environment: Current situation of the Comarca Lagunera in northern Mexico and bioremediation approaches

Arsenic, a metalloid present in the hydrosphere, lithosphere, and biosphere, in large amounts, causes organismtoxicity in organisms by complicated mechanisms. This paper explores the generalities of arsenic discovery and dissemination in crops that affect the Comarca Lagunera in northern Mexico, one of the country's most affected regions. To reduce the toxicity present in crops and soils, this paper includes biological alternatives of bioremediation strategies based on mycorrhizas and rhizobacteria such as plant growth-promoting bacteria in soils.

Source link: https://doi.org/10.1016/j.jafr.2022.100379


Chlorination Treatment for Gold Extraction from Refractory Gold-Copper-Arsenic-Bearing Concentrates

Arsenic is converted into dust media at 873 K, which is 50%, while rhenium is 88 percent at 201390%. The effects of excess air on arsenic and rhenium extraction were investigated: the more effective the air ratio, the more complete the removal of arsenic and rhenium into dust was achieved. Under the conditions of reduced sintering of initial material by natural gas, the best arsenic removal results were obtained. At 823 K a s. , the conversion of arsenic into dust at 88% was almost completely converted into dust, and at 1373 K arsenic was almost completely converted into dust.

Source link: https://doi.org/10.3390/su141711019


Arsenic Adsorption and Desorption in Various Aqueous Media in the Nearshore Zone and Influencing Factors

An extensive knowledge of arsenic's adsorption and desorption behavior in aqueous solution is helpful in determining its behavior in groundwater. Batch experiments were carried out in this research, showing the characteristics of arsenic adsorption and desorption on aqueous media consisting of silty clay, fine sand, medium sand, and fine sand with gravel from Shenyang Huangjia's water source, China. The findings revealed that the aqueous media in the study area had a high fixation capability for arsenic, and that both physical and chemical adsorption of arsenic occurred.

Source link: https://doi.org/10.3390/su141710935


Arsenic-Resistant Plant Growth Promoting Pseudoxanthomonas mexicana S254 and Stenotrophomonas maltophilia S255 Isolated from Agriculture Soil Contaminated by Industrial Effluent

Water drains in several areas of developing countries are irrigated with water from drains contaminated with industrial wastewater that contains many hazardous chemicals, including arsenic. Bacterial isolates isolated from S254 and S255 showed the most resistance against arsenic; up to 225 mM of As and 25 mM of Aspirin were shown in the test. strain S254 was found to Pseudoxanthomonas mexicoa, and strain S255 belonged to the species Stenotrophomonas maltophilia. Both P. mexicominea S254 and S. maltophilia S255 obtained promising results for hydrogen cyanide production, auxin manufacturing, and nitrogen fixation. u22121 and S. maltophilia S255 produced auxin at a rate of 14. 15 mL at a concentration of 14. 15 mL, u22121. Both the bacteria-enhanced the growth of V. radiata and a statistically significant increase in shoot and root lengths were observed both in the presence and absence of arsenic.

Source link: https://doi.org/10.3390/su141710697


Silicon-Induced Tolerance against Arsenic Toxicity by Activating Physiological, Anatomical and Biochemical Regulation in Phoenix dactylifera (Date Palm)

Silicon can play a major role in plant growth mitigation and can help overcome arsenic toxicity and ensure plant growth is safe. Through a series of inflammatory stress-related genes, we'll examine the effects of silicon on date palm under arsenic toxicity by screening antioxidant accumulation, hormonal modulation, and the expression of abiotic stress-related genes. Contrarily, exogenous application of Si to date palm roots had a significant effect on stress reduction by limiting the translocation of arsenic into roots and shoots as opposed to the arsenic sole application. As compared to control and arsenic, the Si application reduced the endogenous abscisic acid under ideal conditions, and salicylic acid and jasmonic acid levels under stress conditions. Hence, the report reveals the important role of silicon in supporting growth and inducing arsenic tolerance by increasing antioxidant production and endogenous hormones in date palm.

Source link: https://doi.org/10.3390/plants11172263


Microbial community composition in the rhizosphere of Pteris vittata and its effects on arsenic phytoremediation under a natural arsenic contamination gradient

Following increased soil arsenic levels, the suitability of soil microbes for P. vittata's growth slowly decreased, as shown by the increased abundance of pathogenic fungi and parasitic bacteria, as well as the decrease of symbiotic fungi. Following increased arsenic levels, the measurement of ascortic-related functional gene abundance in As oxidation, As reduction, and arsenic methylation and demethylation in the rhizosphere of P. vittata revealed the gradual enrichment of the microbial genes involved in As oxidation, As reduction, and arsenic methylation and demethylation in AsChip's rhizosphere. Indigenous soil microbes are remedied by the application of fungicide, but not bactericide, in P. vittata growing under an arsenic contamination gradient, underscoring the importance of indigenous fungal groups in the remediation of arsenic-contaminated soil.

Source link: https://doi.org/10.3389/fmicb.2022.989272


Removal of Arsenic from Wastewater by Using Nano Fe 3 O 4 /Zinc Organic Frameworks

The initial concentration of arsenic was 46. 916 mg/L, and pH 3 was the optimum condition for the Fe 3 O 4 @ZIF-8 to adsorb arsenic at 25 °C. The adsorption of arsenic by the Fe 3 O 4 @ZIF-8 can reach 76 mg/g/L when the dosage was adjusted to 96 percent. The adhesion process of arsenic to the Fe 3 O 4 @ZIF-8 can be well illustrated by the Langmuir isotherm model and the second-order kinetic equation. The maximum adsorption capacity of arsenic by the Fe 3 O 4 @ZIF-8 was 116. 114 mg/g at pH 3 and temperature 298 K.

Source link: https://doi.org/10.3390/ijerph191710897

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions