Arsenic is a naturally occurring, semimetallic element widely distributed in the Earth’s crust. Arsenic levels in the environment can vary by locality, and it is found in water, air, and soil. There are two general forms of arsenic: Organic arsenic compounds contain carbon. There is no relation between organic arsenic and “organic” food
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· Abstract— This paper presents results of analysis of the patent, scientific, and technical literature concerned with the physicochemical and technological foundations of the preparation of high-purity arsenic-containing compounds from various raw materials. Considerable attention is paid to processing of unconventional raw materials (lewisite
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· Several complex organic compounds of arsenic have been employed in the treatment of certain diseases, such as amebic dysentery, caused by microorganisms. Arsenic, a chemical element in
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· The global estimate of 94 million to 220 million people potentially affected by consuming arsenic-contaminated groundwater is broken down by continent and country in tables S4 and S5, respectively,
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· Arsenic (As), a heavy metalloid, occupies the topmost position in the list of the top ten hazardous chemicals published by the World Health Organization. The contamination of arsenic in groundwater predominantly utilized for irrigation and drinking is responsible for serious public health issues across the globe. The two most common
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· The Lagergren first-order model and the pseudo-second-order model were used to fit the data obtained from kinetics studies performed to evaluate the kinetic process of arsenic sorption by iowaite.
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· Groundwater plays a central role in the hydrological cycle and represents the utmost natural resource for human consumption and activities on a global scale. Therefore, any source of contamination of either geogenic or anthropogenic origin may provide a serious environmental health threat. Within the long list of organic and
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The role of sulfur cycling in arsenic behavior under reducing conditions is not well-understood in previous investigations. This study provides observations of sulfur and oxygen isotope fractionation in sulfate and evaluation of
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· The process of arsenic release observed here may not be ubiquitous throughout Bangladesh and West Bengal due to site variations and differing land use practices. However, a map showing the probability of high groundwater arsenic concentrations (BGS and
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· Arsenic contamination in water bodies is a serious problem and causes various health problems due to which US Environment Protection Agency (USEPA) set its maximum permissible limit of 10 ppb. The present review article starts with the removal of toxic arsenic using adsorbents prepared from easily available waste materials. Adsorbent
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· This paper offers a critical analysis of the arsenic-accumulating, transforming bacteria and their potential use and effect in remediating agricultural soil. Given the worldwide presence, sources, types, and pathways of arsenic, accumulating, and transforming bacteria, and the effect of arsenic contamination on plant and agricultural
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· A visual examination of the solid-phase condensation process of arsenic sulfides was conducted using the apparatus illustrated in Figure 3. Figure 3. Setup schematic for visual analysis of sulfide vapor condensation: (1) sulfide sample ampoule; (2) condenser flask; (3) induction furnace circuit; (4) graphite heater; (5) thermocouple; (6)
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· Arsenic (As) pollution is a serious worldwide problem that requires urgent attention, as this heavy metal poses a serious threat to both human and environmental health. Here, Fe3O4 was used as an in situ Fe source removal agent to study the effect of pre-dissolution time on arsenic removal by Fe3O4. Fe3O4 is
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Arsenic is a naturally occurring element commonly found as an impurity in sulfide-bearing mineral ores and volcanic rocks. Arsenic is widely distributed in rocks, soil, natural waters, and in small amounts in most living things. Arsenic is a critical mineral for a variety of uses, especially in gallium-arsenide semiconductors for solar cells
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· Soaking will be an alternative process to remove arsenic in brown rice. One of the main food crops in the world, rice can accumulate high levels of arsenic from flooded paddy soils, which seriously threatens human health. Soaking, a common processing method for brown rice products, especially for brown rice noodles, was investigated in
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Arsenic is a known human carcinogen associated with skin, lung, bladder, kidney, and liver cancer.3 Long-term exposure to arsenic, even at lower levels, can increase the risk of other types of chronic disease.4. Arsenic can afect a broad range of organs and systems including: Cardiovascular system. Endocrine system.
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Search the world's information, including webpages, images, videos and more. Google has many special features to help you find exactly what you're looking for.Our third decade of
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· Numerous experimental studies, varying in terms of their experimental setups and conditions, have investigated many details of the As(III) oxidation via Mn oxides. Among those, we selected a subset of studies (Lafferty et al., 2011, 2010a; Villalobos et al., 2014) that provided suitable data to elucidate and quantify the role of edge sites and
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· 1. Introduction Arsenic (As) rarely occurs in free state and largely found in combination with sulfur, oxygen, and iron. As can appear in the environment in a number of valency states, viz., As (V), As (III), As (0) and As (−3). In
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· Arsenic Arsenic (As) is a naturally occurring element that has been used in a variety of applications — in pesticides, as wood preservatives, and as a treatment for syphilis. Throughout history, arsenic was the most often used poison. Some historians believe that Nero used arsenic to poison Claudius in 54 c.e. Arsenic has also been the
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· Above 99.9 % of arsenic was reductively removed by the UV/sulfite process. • Valuable elemental arsenic (As(0)) with high purity (> 99.5 wt%) was recovered. • Hydrated electrons (e aq −) and H • radicals are responsible for arsenic reduction. SO 3 •− radicals suppress the removal of arsenic by oxidizing As(0) and As(III).
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· Arsenic poses a danger to environmental health, and arsenic-rich groundwater is a key exposure risk for humans. The distribution, migration, and enrichment of arsenic in groundwater is an important
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· Deep treatment, a method for further reducing the content of a target substance, for toxic arsenic (As) from water is vital to reduce environmental pollution and ensure human health. Here, we employed electrosorption of As(V) from water in a self-made three-dimensional reactor with granular activated carbon (GAC). The As(V) concentration
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· The work was undertaken to better understand the link between the process of arsenic removal via continuous circuit coprecipitation as practiced in industrial effluent treatment and the stability
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· Geoffrey Michael Gadd international leader Head deputy research director Professor Fellow president convener Division of Molecular and Environmental Microbiology, College of Life Sciences, University of Dundee, Dundee DD1
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· Typical Results Under the conditions of temperature of 150 C, oxygen partial pressure of 1.5 MPa, L/S mass ratio of 10, Fe/As mole ratio of 1, initial H 2 SO 4 concentration of 10 g/L, reaction time of 6 h, transformation tests were carried out at different calcium lignosulphonate additions: 0, 0.1, 0.2, 0.5 g/20 g residue. . The results are
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Arsenic is released into the air by volcanoes, through weathering of arsenic-containing minerals and ores, and by commercial or industrial processes. Arsenic occurs naturally in the earth’s crust, and much of its dispersion in the environment stems from mining and commercial uses. In industry, arsenic is a byproduct of the smelting process
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· adsorption at pH 4.0 and 8.0 exhibited no obvious changes, which indicated that the material was stable in the process of arsenic removal. Previous studies demonstrated that amorphous ferric
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Understanding the nature of arsenic (As) adsorbed on Fe III oxyhydroxides, and the subsequent behavior of As during the crystallization process, is critical to predicting its fate in a range of natural and engineered settings. In this work, As adsorbed on Fe III oxyhydroxides formed in the different reaction media at different pH values were
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· Coal is the primary energy source in China, and coal pyrolysis is considered an essential and efficient method for clean coal utilization. Three high arsenic coals collected from the southwestern Guizhou province of China were chosen in this study. Low-temperature ashing plus X-ray diffraction analysis (XRD) was used to identify the
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كسارة الحجر - يتم بيعها من قبل الموردين المعتمدين، مثل الفك / المخروط / الكسارة التصادمية / المتنقلة، إلخ.
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