TY - JOUR
T1 - Degradation of 2,4-dichlorophenol by a novel iron based system and its synergism with Cd(II) immobilization in a contaminated soil
AU - Diao, Zeng Hui
AU - Yan, Liu
AU - Dong, Fu Xin
AU - Qian, Wei
AU - Deng, Qi Hua
AU - Kong, Ling Jun
AU - Yang, Jie Wen
AU - Lei, Ze Xiang
AU - Du, Jian Jun
AU - Chu, Wei
PY - 2020/1/1
Y1 - 2020/1/1
N2 - Nowadays, the remediation of heavy metals and organic compounds contaminated soil has been greatly growing attentions. In this paper, the feasibility of a novel biochar-supported zero valent iron (B-nZVI) based system for the degradation of 2,4-Dichlorophenol (2,4-DCP) and immobilization of Cd(II) in contaminated soil was firstly investigated. The most relevant findings revealed that persulfate (PS) could obviously improve the degradation of 2,4-DCP by B-nZVI process. Within 240 min, nearly 91% of 2,4-DCP degradation could be reached at reaction conditions of 40 mg kg−1 2,4-DCP, 6 mM PS, 3.0 g L−1 B-nZVI and pH 4.51. A much higher performance on the 2,4-DCP degradation was observed at acidic and aerobic conditions. A lower concentration of ethylene diamine tetraacetic acid (EDTA) exhibited a slight improvement of 2,4-DCP degradation, whereas humic acids (HA) exhibited a significant inhibitory effect on that. Radical scavenging tests revealed that SO4[rad]− was primarily involved in degradation reaction of 2,4-DCP by B-nZVI/PS process. A total of five intermediate products including 2-chlorohydroquinone, 3,5-dichlorocatechol, phenol, fumaric acid and acetic acid were generated in 2,4-DCP degradation process, whereas two Cd species such as Cd(OH)2 and CdO were identified in Cd(II) immobilization process. A possible mechanism for the 2,4-DCP degradation and Cd(II) immobilization by B-nZVI/PS process was proposed.
AB - Nowadays, the remediation of heavy metals and organic compounds contaminated soil has been greatly growing attentions. In this paper, the feasibility of a novel biochar-supported zero valent iron (B-nZVI) based system for the degradation of 2,4-Dichlorophenol (2,4-DCP) and immobilization of Cd(II) in contaminated soil was firstly investigated. The most relevant findings revealed that persulfate (PS) could obviously improve the degradation of 2,4-DCP by B-nZVI process. Within 240 min, nearly 91% of 2,4-DCP degradation could be reached at reaction conditions of 40 mg kg−1 2,4-DCP, 6 mM PS, 3.0 g L−1 B-nZVI and pH 4.51. A much higher performance on the 2,4-DCP degradation was observed at acidic and aerobic conditions. A lower concentration of ethylene diamine tetraacetic acid (EDTA) exhibited a slight improvement of 2,4-DCP degradation, whereas humic acids (HA) exhibited a significant inhibitory effect on that. Radical scavenging tests revealed that SO4[rad]− was primarily involved in degradation reaction of 2,4-DCP by B-nZVI/PS process. A total of five intermediate products including 2-chlorohydroquinone, 3,5-dichlorocatechol, phenol, fumaric acid and acetic acid were generated in 2,4-DCP degradation process, whereas two Cd species such as Cd(OH)2 and CdO were identified in Cd(II) immobilization process. A possible mechanism for the 2,4-DCP degradation and Cd(II) immobilization by B-nZVI/PS process was proposed.
KW - 2,4-Dichlorophenol (2,4-DCP)
KW - Cd(II)
KW - Contaminated soil
KW - Persulfate (PS)
KW - Zero valent iron (nZVI)
UR - http://www.scopus.com/inward/record.url?scp=85069682885&partnerID=8YFLogxK
U2 - 10.1016/j.cej.2019.122313
DO - 10.1016/j.cej.2019.122313
M3 - Journal article
AN - SCOPUS:85069682885
VL - 379
JO - Chemical Engineering Journal and the Biochemical Engineering Journal
JF - Chemical Engineering Journal and the Biochemical Engineering Journal
SN - 1385-8947
M1 - 122313
ER -