論文

査読有り
2018年6月1日

A comprehensive study including monitoring, assessment of health effects and development of a remediation method for chromium pollution

Chemosphere
  • Masafumi Yoshinaga
  • ,
  • Hiromasa Ninomiya
  • ,
  • M.M. Aeorangajeb Al Hossain
  • ,
  • Makoto Sudo
  • ,
  • Anwarul Azim Akhand
  • ,
  • Nazmul Ahsan
  • ,
  • Md. Abdul Alim
  • ,
  • Md. Khalequzzaman
  • ,
  • Machiko Iida
  • ,
  • Ichiro Yajima
  • ,
  • Nobutaka Ohgami
  • ,
  • Masashi Kato

201
開始ページ
667
終了ページ
675
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1016/j.chemosphere.2018.03.026
出版者・発行元
Elsevier Ltd

Chromium (Cr) pollution caused by wastewater from tanneries is a worldwide environmental problem. To develop a countermeasure, we performed a comprehensive study using Hazaribagh, the tannery area in Dhaka City, Bangladesh, as a model. Our environmental monitoring indicated that the soluble form of Cr, but not barium or arsenic, in Buriganga River is derived from Hazaribagh. Our chemical analysis next showed that Cr, the primary pollutant in canal water at Hazaribagh, consisted of ≤0.7 μM hexavalent Cr [Cr(VI)] and ≤1705 μM trivalent Cr [Cr(III)]. Our biological study then showed that coexposure to Cr(VI) and Cr(III) at possible ratios in canal water at Hazaribagh synergistically promotes transforming activity of human non-tumorigenic HaCaT keratinocytes with activated MEK/ERK and AKT. Our environmental engineering study finally indicated that a magnesium and iron-based hydrotalcite-like compound (MF-HT), our original depurative, can maximally adsorb 9.0 mg/g Cr(VI) and 1041 mg/g Cr(III). Our results suggested the importance of removal of Cr(III) as well as Cr(VI) by showing that Cr(III), which is generally recognized as a chemical with low toxicity, synergistically promoted carcinogenicity of a low level of Cr(VI). Therefore, we propose the use of our original high-efficient and low-cost depurative as a countermeasure to address the worldwide problem of environmental Cr pollution.

リンク情報
DOI
https://doi.org/10.1016/j.chemosphere.2018.03.026
PubMed
https://www.ncbi.nlm.nih.gov/pubmed/29547855

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