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Remediation of Perfluoroalkyl Substances in Landfill Leachates by Electrocoagulation
Author(s) -
Zhang Chunhui,
Peng Yi,
Ning Ke,
Niu Xiameng,
Tan Shuhui,
Su Peidong
Publication year - 2014
Publication title -
clean – soil, air, water
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.444
H-Index - 66
eISSN - 1863-0669
pISSN - 1863-0650
DOI - 10.1002/clen.201300563
Subject(s) - leachate , chemistry , perfluorooctane , environmental remediation , electrocoagulation , environmental chemistry , chemical oxygen demand , sulfamic acid , nuclear chemistry , sulfonate , environmental engineering , contamination , environmental science , wastewater , organic chemistry , ecology , biology , sodium
A process for the determination of anaerobic‐oxic biologically treated perfluoroalkyl substances (PFASs) in leachates from a landfill in Beijing, China, is provided. The applicability of electrocoagulation (EC) with aluminum electrodes for the remediation of PFASs in landfill leachates is investigated in detailed. With reaction time of 45 min, plate distance of 1 cm, current density of 35 mA/cm 2 and plate amounts of four pairs, the EC reactor achieved the optimal removal efficiencies for chemical oxygen demand and PFASs. Perfluorooctane sulfonate was not detected in the treated leachates after the EC treatment. The average removal efficiencies of perfluorohexanoic acid, perfluoroheptanoic acid, perfluorooctanoate acid, perfluorononanoic acid and perfluorodecanoic acid were 65.1, 58.5, 75.2, and 33.8%, respectively. However, perfluoroundecanoic acid and perfluorododecanoic acid concentration increased by about 20.2 and 18.6% after the EC treatment process.