TY - JOUR
T1 - Continuous treatment of abandoned mine wastewater containing As and Fe using Mg–Al layered double hydroxides with flocculation
AU - Yang, X.
AU - Osawa, H.
AU - Kameda, T.
AU - Masaki, Y.
AU - Saito, Y.
AU - Kumagai, S.
AU - Yoshioka, T.
N1 - Funding Information:
This research was supported by the Leading Research Project for the Prevention of Mine Pollution of Japan Oil, Gas, and Metals National Corporation (JOGMEC).
Publisher Copyright:
© 2021, Islamic Azad University (IAU).
PY - 2021/12
Y1 - 2021/12
N2 - 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.
AB - 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.
KW - Continuous treatment
KW - Heavy metals
KW - Mg–Al layered double hydroxides
KW - Mine wastewater
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U2 - 10.1007/s13762-021-03232-2
DO - 10.1007/s13762-021-03232-2
M3 - Article
AN - SCOPUS:85102172614
SN - 1735-1472
VL - 18
SP - 4037
EP - 4042
JO - International Journal of Environmental Science and Technology
JF - International Journal of Environmental Science and Technology
IS - 12
ER -