Reduction mechanism of hexavalent chromium by functional groups of undissolved humic acid and humin fractions of typical black soil from Northeast China
作者: Jia ZhangHuilin YinHui WangLin XuBarnie SamuelFei LiuHonghan Chen
作者单位: 1Beijing Key Laboratory of Water Resources and Environmental Engineering, China University of Geosciences
刊名: Environmental Science and Pollution Research, 2018, Vol.25 (17), pp.16913-16921
来源数据库: Springer Journal
DOI: 10.1007/s11356-018-1878-5
关键词: Humic acidHuminFunctional groupsHexavalent chromiumReduction
英文摘要: Abstract(#br)Soil organic matters (SOM) have a great retention effect on Cr(VI) migration in subsurface environment, which act as the main electron donors for Cr(VI) reduction; however, Cr(VI) reduction mechanism by different SOM fractions is still unclear, such as undissolved humic acid (HA) and humin (HM). In this study, HA and HM fractions extracted from typical black soil from Northeast China were used to investigate the reaction mechanism between humus functional groups and Cr(VI). According to the results, phenol and hydroxyl were determined as the main electron donors for Cr(VI) reduction by HA and HM instead of carboxyl and carbonyl, which were more likely involved in Cr complexation. Furthermore, Cr(VI) reduction was more dependent on aromatic carbon, rather than aliphatic...
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影响因子:2.618 (2012)

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