摘要
As a strong reducing radical,carbon dioxide anion radical(CO·-2)can be generated by initiating sulfate radical(SO·-4)in the presence of tonnate anions(FA)for Cr(Ⅵ)reduction.Moreover,activated carbon(AC)-catalyzed persultate(PS)oxidation is an economically justifiable,enⅥronmentally friendly,and easy-to-scalemethod to produce SO·-4 The complete removal of Cr(Ⅵ)was achieved within 280 min for an initial Cr(Ⅵ)concentration of 50 mg/L under the optional condition of c(AC)=1 g/L,[PS]0=1O mmol/L,[FA]0=10 mmol/L,T=30℃,and unadjusted pH.When the molar ratio of FA to PS was greater than or equal to 1,the system maintained a strong reduction state.The mechanism investigation confirmed that FA was converted to carboxyl anion radical(CO2·-2)as the predominant radical tor Cr(Ⅵ)reduction.This novel system may offer a potential plattbnn teclmology tor Cr(Ⅵ)wastewater treatment.
基金
Supported by the National Nature Science Foundation of China(No.41302184)
the Project of the Research on Water Environmental Protection Strategy and Management Policy in Beijing-Tianjin-Hebei Region,China(No.2018ZX07111001)
the Scientific Frontier and Interdisciplinary Research Project of Jilin University
the Outstanding Youth Cultivation Plan of Jilin University,the Fund of the Key Laboratory of Groundwater Resources and Environmental of Ministry of Education(Jilin University) China
the Project of the National and Local Joint Engineering Laboratory for Petrochemical Contaminated Site Control and Remediation Teclmology of China.
