Comparison of humic and fulvic acid on remediation of arsenic contaminated soil by electrokinetic technology

Li，Jiangpeng1,2; Ding，Ying1; Wang，Kaili1; Li，Ningqing1; Qian，Guangren1; Xu，Yunfeng1; Zhang，Jia1

2020-02-01

10.1016/j.chemosphere.2019.125038

CHEMOSPHERE   影响因子和分区

0045-6535

1879-1298

The use of humic acid (HA) and fulvic acid (FA) as reinforcing agents to improve the efficiency of electrokinetic remediation (EKR) were investigated for the first time using an artificially contaminated soil. A series of soil leaching tests and bench-scale EKR experiments were performed to elucidate the mechanisms of As removed from artificially contaminated soil. The characterization of total reducing capacity (TRC) and functional group were carried out to reveal the difference of HA and FA. The observations demonstrated that with 0.1 M NaOH and KCl as the anolyte, using both HA and FA enhanced the efficiency of EKR. After 25 days of EKR, the removal efficiency of TAs in HA/FA-enhanced EKR was about 2.0–3.0 times greater than when unenhanced. Compared to HA, more As was removed in EKR with FA, which has more TRC and oxygen-containing groups. These EKR experimental results, with the support of data obtained from soil leaching test, indicate that competitive adsorption, reductive dissolution and complexation were the reasons why HA and FA promoted the release of As in the soil and further enhanced the remediation efficiency.

Arsenic-contaminated soil Electrokinetic remediation Fulvic acid Humic acid Temperature-programmed decomposition

EI ; SCI

英语

其他

Foundation for Innovative Research Team of Jimei University[IRT13078] ; National Natural Science Foundation of China[21878183]

Environmental Sciences & Ecology

Environmental Sciences

WOS:000509791600102

Elsevier Ltd

20194107522916

Arsenic ; Chlorine compounds ; Contamination ; Efficiency ; Electrodynamics ; Leaching ; Organic acids ; Potassium compounds ; Remediation ; Sodium hydroxide ; Soil pollution ; Soils

Environmental Impact and Protection:454.2 ; Soils and Soil Mechanics:483.1 ; Electricity and Magnetism:701 ; Chemical Operations:802.3 ; Chemical Products Generally:804 ; Organic Compounds:804.1 ; Production Engineering:913.1

ENVIRONMENT/ECOLOGY

2-s2.0-85073032624

Scopus

1.School of Environmental and Chemical EngineeringShanghai University,Shanghai,No.99 Shangda Rd.,200444,China
2.School of Environmental Science and EngineeringSouthern University of Science and Technology,Shenzhen,1088 Xueyuan Blvd, Nanshan District,518055,China

Li，Jiangpeng,Ding，Ying,Wang，Kaili,et al. Comparison of humic and fulvic acid on remediation of arsenic contaminated soil by electrokinetic technology[J]. CHEMOSPHERE,2020,241.

Li，Jiangpeng.,Ding，Ying.,Wang，Kaili.,Li，Ningqing.,Qian，Guangren.,...&Zhang，Jia.(2020).Comparison of humic and fulvic acid on remediation of arsenic contaminated soil by electrokinetic technology.CHEMOSPHERE,241.

Li，Jiangpeng,et al."Comparison of humic and fulvic acid on remediation of arsenic contaminated soil by electrokinetic technology".CHEMOSPHERE 241(2020).