Journal
PLOS ONE
Volume 8, Issue 6, Pages -Publisher
PUBLIC LIBRARY SCIENCE
DOI: 10.1371/journal.pone.0066681
Keywords
-
Categories
Funding
- Ministry of Education, Culture, Sports, Science and Technology (MEXT) [24108001]
- COE Project (Health Science Hills) for Private Universities form MEXT
- Chubu University [S0801055]
- Tokyo Biochemical Research Foundation (TBRF)
- Naito Foundation Natural Science Scholarship
- Uehara Memorial Foundation
- AEON Environmental Foundation
- Cosmetology Research Foundation
- [20406003]
- [24390157]
- [24406002]
- [23650241]
- Grants-in-Aid for Scientific Research [13J40080] Funding Source: KAKEN
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Health risk for well drinking water is a worldwide problem. Our recent studies showed increased toxicity by exposure to barium alone (<= 700 mu g/L) and coexposure to barium (137 mu g/L) and arsenic (225 mu g/L). The present edition of WHO healthbased guidelines for drinking water revised in 2011 has maintained the values of arsenic (10 mu g/L) and barium (700 mu g/L), but not elements such as manganese, iron and zinc. Nevertheless, there have been very few studies on barium in drinking water and human samples. This study showed significant correlations between levels of arsenic and barium, but not its homologous elements (magnesium, calcium and strontium), in urine, toenail and hair samples obtained from residents of Jessore, Bangladesh. Significant correlation between levels of arsenic and barium in well drinking water and levels in human urine, toenail and hair samples were also observed. Based on these results, a high-performance and low-cost adsorbent composed of a hydrotalcite-like compound for barium and arsenic was developed. The adsorbent reduced levels of barium and arsenic from well water in Bangladesh and Vietnam to <7 mu g/L within 1 min. Thus, we have showed levels of arsenic and barium in humans and propose a novel remediation system.
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