Arsenic Processing Plants
- صفحه اصلی
- Arsenic Processing Plants
Arsenotrophic bacteria play an essential role in lowering arsenic contamination by converting toxic arsenite [As (III)] to less toxic and less bio-accumulative arsenate [As (V)]. The current study ...
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There are more than 100 different arsenic with different characteristics in the soil-water-plant ecosystem. The identification and quantification of individual arsenic species is essential for understanding the distribution, environmental fate and behavior, metabolism and toxicity of arsenic. Due to the hazardous nature of arsenic, people …
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Arsenic levels are typically modest in plants growing in natural soil (3.6 mg kg −1) . Most plants are harmed by As at greater concentrations. Arsenic-induced …
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Significant variations in seed germination, shoot, and root length were observed in plants affected with arsenic. Several studies demonstrate the impact of …
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Arsenic is a highly toxic metalloid widespread in the Earth's crust, and its contamination due to different anthropogenic activities (application of agrochemicals, mining, waste management) represents an emerging environmental issue. Therefore, different sustainable and effective remediation methods and approaches are needed to …
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The rate of arsenic release from sulfide minerals can be accelerated by mining activities, which expose the minerals to weathering processes during excavation. Also, arsenic can be mobilized by weathering of outdoor stored waste byproducts produced during the subsequent metal value recovery process.
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Arsenic (As) is highly toxic metal (loid) that impairs plant growth and proves fatal towards human population. It disrupts physiological, biochemical and molecular …
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Arsenic Acquisition, Transport, and Metabolism in Plants. When considering the effects of As on plant cellular metabolism, it is important to consider the As species present in soils, the ability of these chemical species to enter plant cells, the ability of the plant to transform one As species to another, and the various As transport pathways …
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1. Introduction. Arsenic (As), a toxic metalloid, has caused contaminations in soil and ground water in many regions of the world. Arsenic can enter the food chain through plant uptake and accumulation, and possibly lead to toxic and carcinogenic effects on humans (Zhu et al., 2014).Both natural and anthropogenic activities release As …
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Arsenic is an acutely harmful element, chronic exposure to as causes severe illness such as cancer. Arsenic contained in minerals enters metallurgical system, during the smelting process of metal. Acidic wastewater containing arsenic known as waste acid is obtained from washing and purifying smelting flue gas [1,2,3,4]. Waste …
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Arsenic contaminations, often adversely influencing the living organisms, including plants, animals, and the microbial communities, are of grave apprehension. Many physical, chemical, and biological techniques are now being explored to minimize the adverse affects of arsenic toxicity. Bioremediation of arsenic species using arsenic loving bacteria has …
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Arsenic is widespread in the environment where it occurs combined with metals and sulfur and as secondary minerals in combination with oxygen. Its atomic structure allows it to be trivalent or pentavalent, and its properties lead to its classification as a metalloid in the periodic classification of the elements. Arsenic xide is a by-product …
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Inhibition of germination process; plant biomass reduction : Cu: Bean (Phaseolus vulgaris) Buildup of Cu in plant roots; root malformation and reduction ... Choi H.S. Effect of dimethylarsinic acid (DMAA) on growth, tissue arsenic and photosynthesis of rice plants. J. Plant Nutr. 1993; 16:865–880. doi: 10.1080/064580. …
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Plants absorb arsenic from the soil in varying amounts and move it to different parts depending on the type of plant. Arsenic occurs naturally in soil, but arsenic containing …
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Arsenic (As) contamination is a major problem affecting soil and groundwater in India, harming agricultural crops and human health. Plant growth-promoting rhizobacteria (PGPR) have emerged as promising agents for reducing As toxicity in plants. This study aimed to isolate and characterize As-tolerant PGPR from rice field soils with …
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Arsenic contamination in industrial and mining effluents has always been a serious concern. Recently, nano-sized iron particles have been proven effective in sorptive removal of arsenic, because of their unique surface characteristics. In this study, green synthesis of iron nanoparticles was performed using a mixed extract of two plant …
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The metalloid arsenic (As) is a naturally occurring soil element with no proven beneficial physiological activity for plants (Abbas et al. 2018).Natural geologic processes and anthropogenic activities escalate the level of As in the drinking water and food chain thereby increasing the human exposure for As (Shri et al. 2019).Arsenic …
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Arsenic is a ubiquitous toxic metalloid, the concentration of which is beyond WHO safe drinking water standards in many areas of the world, owing to many natural and anthropogenic activities. Long-term exposure to arsenic proves lethal for plants, humans, animals, and even microbial communities in the environment. Various sustainable …
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The plasma membrane of the plant cells are more susceptible to arsenic toxicity-cause cellular damage, reduce stomatal conductance, affect nutrient uptake and impart disruption in the transpiration process of the plants (Kofroňová et al., 2018). Arsenic entry inside the plant cell even at minute level induces deleterious effects on …
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Arsenic in drinking water is a problem in more than 70 countries around the world, including Argentina, Bangladesh, Cambodia, Chile, China, India, Mexico, Pakistan, Vietnam, and the United States. 1 Arsenic may be found in certain foods. Because . of arsenic's presence in soil and water, food from . plants that were irrigated with ...
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As being non-essential for plants causes severe toxicity after uptake, translocation and accumulation (Li et al., 2016; Zhang et al., 2021).Plants take As via different transporters and therefore, function as driving force as they set a gradient among source and sink (Fig. 1).Various factors such as soil type, As speciation, plant type, …
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The process by which plants absorb arsenic changes according to chemical speciation. As(V) has reportedly been shown to enter plant cells through inorganic Phosphate (Pi) channels. However, because their chemical structures are similar, plants may absorb As(III) through a variety of intrinsic proteins that resemble nodulin-26 and …
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Sulfur metabolism plays a central role in the arsenic detoxification process and is critical for plants survival in arsenic contaminated soil . Arsenic exposure in plants induces the synthesis of low molecular weight sulphur rich ligands like glutathione and phytochelatin (GSH and PC, respectively) that requires adequate supplies of the GSH ...
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arsenic precipitation. A Mintek analyser is installed to control the cyanide levels for direct measurement of total, WAD, and free cyanide. The detox CIL tailings are pumped directly to the separate cell of the tailings dam located several kilometres away from the process plant. The housekeeping around the plant is very good.
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Arsenic exists in both organic and inorganic species and generates toxicity responses in the environment. The available form of As for the plant uptake is As III, As v, MMA and DMA; this section deals with the uptake mechanism of these available form As in plants.. Arsenite; As III uptake – Arsenite presented predominantly as a neutral …
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Arsenic (As) is an element that is nonessential for and toxic to plants. Arsenic contamination in the environment occurs in many regions, and, depending on environmental factors, its accumulation in food crops may pose a health risk to humans. ... suggesting that there is no adaptive enhancement of this process in the tolerant plants.
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Terrestrial plant. Arsenic is a non-essential element accumulated in plants via oxidative and/or genotoxic mechanisms depending upon several factors. It can enter plants through soil, water, and air, entering the food chain, where accumulation and biomagnification occur. 23 In fact, plants – particularly rice, wheat, maize, and vegetables – are the main source …
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Arsenic is reported to disturb biochemical and metabolic pathways such as impeded nutrient absorption, the negative effect on photosynthetic apparatus, the …
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3. Arsenic, a Dominant Environmental Contaminant. Arsenic is one of the most potent non-metalloid PTE environmental contaminants among all others [] found that are toxic to plants; As with its associated molecules, is included in Group 1 of human carcinogens [] by the International Agency for Research on Cancer (IARC) and the …
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Arsenic (As) is a metalloid prevalent mainly in soil and water. The presence of As above permissible levels becomes toxic and detrimental to living organisms, therefore, making it a significant global …
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The aim of the review is to provide up-to-date information on arsenic contamination of plants and animals, transfer mechanism, bioaccumulation …
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The United States has not mined arsenic since 1985, and imports all the metallic arsenic and arsenic compounds that it consumes. Very little is recycled, except in waste from factories that make arsenic compounds and limited quantities of arsenic metal have been recovered from gallium-arsenide (GaAs) semiconductor scrap.
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Arsenic tolerance and detoxification in plants. Arsenic tolerance mechanisms in plants compass a variety of approaches. These approaches can be either to restrict or …
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Arsenic is a naturally occurring element that is widely distributed in the Earth's crust. It is found in water, air, food, and soil. ... Contamination from mining and fracking, coal-fired power plants, arsenic-treated lumber, and arsenic-containing pesticides also contributes to increased levels of arsenic in certain locations.
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Several studies reported that phytoremediation of arsenic contaminated soils by using arsenic hyperaccumulator plants is a cost-effective and eco-friendly …
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