Continuous treatment of abandoned mine wastewater containing As and Fe using Mg–Al layered double hydroxides with flocculation

X. Yang, H. Osawa, T. Kameda, Y. Masaki, Y. Saito, S. Kumagai, T. Yoshioka

研究成果: Article査読

抄録

In this study, we conducted a continuous wastewater treatment of an abandoned mine site in Japan to remove As and Fe using Mg–Al layered double hydroxides followed by flocculation and with Ca(OH)2 for comparison. The combination of flocculant ACCOFLOC®A-110 obtained low As and Fe residual concentration, suspended solids, and sludge volume and improved treatment performance by solely layered double hydroxides. Results of continuous wastewater treatment showed that post-treated water conformed with the Japanese Uniform National Effluent Standards for pH, concentration of As, Fe, and suspended solids amount. Compared with treatment using Ca(OH)2, treatment using layered double hydroxides was able to reduce the volume of hydrous sludge with a lower water content and also showed a possibility to reduce transportation cost of sludge based on cost calculation.

本文言語English
ジャーナルInternational Journal of Environmental Science and Technology
DOI
出版ステータスAccepted/In press - 2021

ASJC Scopus subject areas

  • 環境工学
  • 環境化学
  • 農業および生物科学(全般)

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