Arsenite mineral - Wikipedia
网页Arsenite minerals are very rare oxygen-bearing arsenic minerals. Classical world localities where such minerals occur include the complex skarn manganese deposit at Långban ( Sweden) and the polymetallic Tsumeb deposit ( Namibia ).
Arsenite - Wikipedia
网页In chemistry, an arsenite is a chemical compound containing an arsenic oxyanion where arsenic has oxidation state +3. Note that in fields that commonly deal with groundwater chemistry, arsenite is used generically to identify soluble As III anions.
Arsenate mineral - Wikipedia
网页Arsenate minerals usually refer to the naturally occurring orthoarsenates, possessing the (AsO 4) 3− anion group and, more rarely, other arsenates with anions like AsO 3 (OH) 2− (also written HAsO 42−) (example: pharmacolite Ca (AsO 3 OH). 2H 2 O) or (very rarely) [AsO 2 (OH) 2] − (example: andyrobertsite ).
Arsenate mineral | Structure, Occurrence, Chemistry | Britannica
网页arsenate mineral, any of a group of naturally occurring compounds of arsenic, oxygen, and various metals, most of which are rare, having crystallized under very restricted conditions. At the mineralogically famous Långban iron and manganese mines in central Sweden, more than 50 species of arsenate minerals have been described, many peculiar to ...
Arsenic: its chemistry, its occurrence in the earth and its release ...
网页2020年10月17日 · Mineral deposits contain arsenic, combined with sulfur and metals such as cobalt, copper, gold and iron, from which it can be recovered as arsenic trioxide during smelting operations. Natural processes can release the arsenic from mineral deposits and give rise to arsenic-contaminated groundwater.
Arsenate Mineral - an overview | ScienceDirect Topics
网页Arsenite mainly exists in the form of H 3 AsO 3 in AMD and natural water, and is very mobile because of its neutral nature. Arsenate and arsenite adsorb on many metal (hydr)oxides and clay minerals through formation of inner-sphere and/or outer-sphere surface complexes, and solution pH and competing anions …
Arsenic: Chemistry, Occurrence, and Exposure - ScienceDirect
网页2015年1月1日 · Arsenite and arsenate primarily adsorb at the surface of Fe oxides due to their wide occurrence, high point of zero charge, and high affinity for arsenic. Two commonly occurring minerals of Fe, ferrihydrite and goethite, are considered important due to their large surface area.
Mineral Systems and Thermodynamic Stability of Arsenic
网页2019年8月30日 · Our approach allows to organize arsenic mineral species using their chemical composition and to arrange the existing data into coherent frameworks emphasizing changes in mineral diversity and composition through space and time.
Arsenic and Environment: A Systematic Review on Arsenic
网页2024年1月2日 · Arsenides and arsenosulfides are typically related to metamorphic and igneous rocks and anoxic hydrothermal ore deposits. Upon interaction with water molecule or oxygen, these minerals quickly transform into arsenates and arsenites. The most common mineral species containing arsenic is arsenopyrite .
Coupled anaerobic methane oxidation and reductive arsenic ... - Nature
网页2020年11月23日 · In microcosm incubations with natural wetland soils, we find that the coupled pathway of anaerobic methane oxidation and arsenate reduction contributed 26 to 49% of total arsenic release from...