Journal ArticleDOI
The Ecology of Arsenic
Ronald S. Oremland,John F. Stolz +1 more
Reads0
Chats0
TLDR
This work reviews what is known about arsenic-metabolizing bacteria and their potential impact on speciation and mobilization of arsenic in nature and investigates their role in aquifers.Abstract:
Arsenic is a metalloid whose name conjures up images of murder. Nonetheless, certain prokaryotes use arsenic oxyanions for energy generation, either by oxidizing arsenite or by respiring arsenate. These microbes are phylogenetically diverse and occur in a wide range of habitats. Arsenic cycling may take place in the absence of oxygen and can contribute to organic matter oxidation. In aquifers, these microbial reactions may mobilize arsenic from the solid to the aqueous phase, resulting in contaminated drinking water. Here we review what is known about arsenic-metabolizing bacteria and their potential impact on speciation and mobilization of arsenic in nature.read more
Citations
More filters
Journal ArticleDOI
Arsenic speciation in water, suspended particles, and coastal organisms from the Taehwa River Estuary of South Korea.
TL;DR: Concentrations of As were greater in macroalgae than in marine animals, such as fishes, bivalves, crabs, shrimps, and gastropods, and the results of the present study provide useful information on the behaviors and fate of arsenicals in an estuarine environment.
Journal ArticleDOI
Natural attenuation potential of phenylarsenicals in anoxic groundwaters.
TL;DR: It is indicated that PAA can undergo microbiologically mediated transformation in anoxic aquifers, leading to reduced concentrations in groundwater, which indicate a (enhancend) natural attenuation potential.
Journal ArticleDOI
Nitrite Accumulation Is Required for Microbial Anaerobic Iron Oxidation, but Not for Arsenite Oxidation, in Two Heterotrophic Denitrifiers.
Jun Zhang,Cheng-Wei Chai,Laurel K. ThomasArrigo,Shi-Chen Zhao,Ruben Kretzschmar,Fang-Jie Zhao +5 more
TL;DR: It is suggested that abiotic reaction of Fe(II) with nitrite, whilst reduction of nitrate to nitrite is sufficient for redox coupling with anaerobic As(III) oxidation catalyzed by Aio.
Journal ArticleDOI
Factors controlling arsenic contamination and potential remediation measures in soil-plant systems
Hafiz Faiq Bakhat,Zahida Zia,Sunaina Abbas,Hafiz Mohkum Hammad,Ghulam Mustafa Shah,Samina Khalid,Naeem Shahid,Muhammad Sajjad,Shah Fahad +8 more
TL;DR: A review of the literature suggests that the contamination of the human food chain can be controlled through careful selection and application of water purification techniques with other agronomic practices as discussed by the authors.
Journal ArticleDOI
Arsenic speciation in multiple metal environments: I. Bulk-XAFS spectroscopy of model and mixed compounds
TL;DR: The analyses showed that of all data reduction steps, data presented in r-space and as wavefunctions of Fourier-filtered shells offer the greatest possibility for fingerprinting and inferring the influence of co-sorbing metal cations on the As(V) sorption complex.
References
More filters
Journal ArticleDOI
A review of the source, behaviour and distribution of arsenic in natural waters
TL;DR: The scale of the problem in terms of population exposed to high As concentrations is greatest in the Bengal Basin with more than 40 million people drinking water containing ‘excessive’ As as mentioned in this paper.
Journal ArticleDOI
Worldwide Occurrences of Arsenic in Ground Water
TL;DR: Nordstrom et al. as mentioned in this paper argue that human health risks from arsenic in ground water can be minimized by incorporating hydrogeochemical knowledge into water management decisions and by more careful monitoring for arsenic in geologically high-risk areas.
Journal ArticleDOI
Arsenic poisoning of Bangladesh groundwater
TL;DR: Sedimentological study of the Ganges alluvial sediments shows that the arsenic derives from the reductive dissolution of arsenic-rich iron oxyhydroxides, which in turn are derived from weathering of base-metal sulphides.
Journal ArticleDOI