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
Long-term arsenite exposure decreases autophagy by increased release of Nrf2 in transformed human keratinocytes
Jing Wu,Yiping Ni,Qianlei Yang,Jiayuan Mao,Xuerui Zhu,Shasha Tao,Koichi Kato,Jie Zhang,Dapeng Wang,Kenzo Yamanaka,Yan An +10 more
TL;DR: It is suggested that long-term exposure to arsenite promotes Nrf2 upregulation via the PI3K/Akt pathway and, along with upregulation of downstream mTOR and Bcl2, contributes to autophagy dysfunction in transformed HaCaT cells.
Journal ArticleDOI
Arsenic biotransformation potential of marine phytoplankton under a salinity gradient
Rimana Islam Papry,Yoshiki Omori,Shogo Fujisawa,M. Abdullah Al Mamun,M. Abdullah Al Mamun,Sohag Miah,Sohag Miah,Asami S. Mashio,Teruya Maki,Hiroshi Hasegawa +9 more
TL;DR: In this paper, the authors investigated the arsenic (As) biotransformation potential of three marine phytoplankton species, namely Prymnesium parvum, Oltmannsiellopsis viridis, and Eutreptiella gymnestica under a broad salinity gradient.
Journal ArticleDOI
Improved grain yield and lowered arsenic accumulation in rice plants by inoculation with arsenite-oxidizing Achromobacter xylosoxidans GD03.
KaiTeng Wang,YuanPing Li,YongChen Wu,Zong-Qing Qiu,ZhenXi Ding,XingJu Wang,Wei Chen,RenJie Wang,FengFu Fu,Christopher Rensing,GuiDi Yang +10 more
TL;DR: The results highlight that a highly arsenite-oxidizing bacterium could accelerate arsenite oxidation of paddy soil when facing competition with the native microflora, thus decrease arsenic toxicity and bioavailable soil arsenic.
Journal ArticleDOI
Arsenic‐tolerant microbial consortia from sediments of Copahue geothermal system with potential applications in bioremediation
TL;DR: This study is the first report of As tolerance microorganisms obtained from Copahue and reasserts the versatility and flexibility of the community of this natural extreme environment and opens the door to the study of possible uses of these consortia in the design of biotechnological processes where the As concentration may fluctuate.
Journal ArticleDOI
The genomic sequence of Exiguobacterium chiriqhucha str. N139 reveals a species that thrives in cold waters and extreme environmental conditions
Ana Gutiérrez-Preciado,Ana Gutiérrez-Preciado,Carlos Vargas-Chávez,Mariana Reyes-Prieto,Omar Federico Ordoñez,Diego Santos-Garcia,Diego Santos-Garcia,Tania Rosas-Pérez,Jorge Valdivia-Anistro,Eria A. Rebollar,Andrés Saralegui,Andrés Moya,Enrique Merino,Maria Eugenia Farias,Amparo Latorre,Valeria Souza +15 more
TL;DR: The genome analysis of the Andean strain suggests the presence of enzymes that confer E. chiriqhucha str.
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