TY - JOUR
T1 - Reaction of activated carbon zerovalent iron with pentachlorophenol under anaerobic conditions
AU - Ren, Yangmin
AU - Ma, Junjun
AU - Lee, Yonghyeon
AU - Han, Zhengchang
AU - Cui, Mingcan
AU - Wang, Bin
AU - Long, Mingce
AU - Khim, Jeehyeong
N1 - Funding Information:
Funding: This work was supported by the Korean Ministry of the Environment as a Subsurface Environment Management (SEM) project (No. 2019002480001 ) and the Nanjing Science and Technology Program - International Co-operation in Industrial Technology Research and Development (NSTP) project (No. 201911003 ).
Publisher Copyright:
© 2021
PY - 2021/5/15
Y1 - 2021/5/15
N2 - Pentachlorophenol (PCP) is a toxic pollutant and often treated with zero-valent iron (ZVI) in groundwater. In order to improve the reaction rate and selectivity, activated carbon modified zero-valent iron to degrade PCP. This study investigated the effects of carbon loading on the structure, specific surface, and hydrophobicity of AC-ZVI. The results showed that water contact angle and specific surface, which determined hydrophobicity and adsorption capacity, account for the reactivity and selectivity of AC-ZVI during the reduction degradation of the contaminant PCP. The pseudo-first-order kinetic degradation rate of AC-ZVI is 7.44ⅹ10−2 h−1, and two times higher than for ZVI (3.21ⅹ10−2 h−1). Besides, as the [C/Fe]measured weight ratio increased, the ratio of KPCP/KH2 increased from a minimum of 0.218% to a maximum of 0.533%. Based on the pathway of AC-ZVI and PCP, the reduction degradation mechanism of PCP was discussed. These findings can contribute to the rational design of AC-ZVI with properties tailored to a variety of halogenated organics in groundwater remediation.
AB - Pentachlorophenol (PCP) is a toxic pollutant and often treated with zero-valent iron (ZVI) in groundwater. In order to improve the reaction rate and selectivity, activated carbon modified zero-valent iron to degrade PCP. This study investigated the effects of carbon loading on the structure, specific surface, and hydrophobicity of AC-ZVI. The results showed that water contact angle and specific surface, which determined hydrophobicity and adsorption capacity, account for the reactivity and selectivity of AC-ZVI during the reduction degradation of the contaminant PCP. The pseudo-first-order kinetic degradation rate of AC-ZVI is 7.44ⅹ10−2 h−1, and two times higher than for ZVI (3.21ⅹ10−2 h−1). Besides, as the [C/Fe]measured weight ratio increased, the ratio of KPCP/KH2 increased from a minimum of 0.218% to a maximum of 0.533%. Based on the pathway of AC-ZVI and PCP, the reduction degradation mechanism of PCP was discussed. These findings can contribute to the rational design of AC-ZVI with properties tailored to a variety of halogenated organics in groundwater remediation.
KW - 57Fe Mössbauer spectra
KW - Activated carbon-zero valent iron
KW - Contact angles
KW - Pentachlorophenol
KW - Specific surface area
UR - http://www.scopus.com/inward/record.url?scp=85103083709&partnerID=8YFLogxK
U2 - 10.1016/j.jclepro.2021.126748
DO - 10.1016/j.jclepro.2021.126748
M3 - Article
AN - SCOPUS:85103083709
SN - 0959-6526
VL - 297
JO - Journal of Cleaner Production
JF - Journal of Cleaner Production
M1 - 126748
ER -
