Arsenic mineral dissolution and possible mobilization in mineral-microbe-groundwater environment
Article
Article Title | Arsenic mineral dissolution and possible mobilization in mineral-microbe-groundwater environment |
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ERA Journal ID | 4682 |
Article Category | Article |
Authors | Islam, A. B. M. R. (Author), Maity, Jyoti Prakash (Author), Bundschuh, Jochen (Author), Chen, Chien-Yen (Author), Bhowmik, Bejon Kumar (Author) and Tazaki, Kazue (Author) |
Journal Title | Journal of Hazardous Materials |
Journal Citation | 262, pp. 989-996 |
Number of Pages | 8 |
Year | 2013 |
Publisher | Elsevier |
Place of Publication | Netherlands |
ISSN | 0304-3894 |
1873-3336 | |
Digital Object Identifier (DOI) | https://doi.org/10.1016/j.jhazmat.2012.07.022 |
Web Address (URL) | http://www.sciencedirect.com/science/article/pii/S0304389412007297 |
Abstract | Arsenic (As) is widely distributed in the nature as ores or minerals. It has been attracted much attention for the global public health issue, especially for groundwater As contamination. The aim of this study was to elucidate the characteristics of microbes in groundwater where As-minerals were dissolved. An ex situ experiment was conducted with 7 standard As-minerals in bacteria-free groundwater and stored in experimental vessels for 1 year without supplementary nutrients. The pH (6.7-8.4) and Eh S.H.E. (24-548 mV) changed between initial (0 day) and final stages (365 days) of experiment. The dissolution of As was detected higher from arsenolite (4240 ± 8.69 mg/L) and native arsenic (4538 ± 9.02 mg/L), whereas moderately dissolved from orpiment (653 ± 3.56 mg/L) and realgar (319 ± 2.56 mg/L) in compare to arsenopyrite (85 ± 1.25 mg/L) and tennantite (3 ± 0.06 mg/L). Optical microscopic, scanning electron microscopic observations and flurometric enumeration revealed the abundance of As-resistant bacillus, coccus and filamentous types of microorganisms on the surface of most of As-mineral. 4′-6-Diamidino-2-phenylindole (DAPI)-stained epifluorescence micrograph confirmed the presence of DNA and carboxyfluorescein diacetate (CFDA) staining method revealed the enzymatically active bacteria on the surface of As-minerals such as in realgar (As 4S 4). Therefore, the microbes enable to survive and mobilize the As in groundwater by dissolution/bioweathering of As-minerals. |
Keywords | arsenic-minerals; As-resistant microorganisms; groundwater; bioweathering; flurometric enumeration |
Contains Sensitive Content | Does not contain sensitive content |
ANZSRC Field of Research 2020 | 350505. Occupational and workplace health and safety |
429999. Other health sciences not elsewhere classified | |
400513. Water resources engineering | |
Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
Byline Affiliations | University of Tokyo, Japan |
National Chung Cheng University, Taiwan | |
National Centre for Engineering in Agriculture | |
Kanazawa University, Japan | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q17yw/arsenic-mineral-dissolution-and-possible-mobilization-in-mineral-microbe-groundwater-environment
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