A novel sulfite coupling electro-fenton reactions with ferrous sulfide cathode for anthracene degradation
A novel sulfite coupling electro-fenton reactions with ferrous sulfide cathode for anthracene degradation
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一种新型亚硫酸盐偶联电芬顿反应与硫化亚铁阴极降解蒽
DOI：
10.1016/j.cej.2020.125945
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发表时间：
2020-11
影响因子：
15.1
通讯作者：
Juan Gao
中科院分区：
文献类型：
--
作者：
Longgang Chu;Zhaoyue Sun;Long Cang;Guodong Fang;Xinghao Wang;Dongmei Zhou;Juan Gao
首次将黄铁矿改性炭毡（FeS 2/CF）用作电化学高级氧化的阴极。FeS 2/CF阴极可以通过这种亚硫酸盐耦合非均相电芬顿（HEF）过程连续提供Fe（II）和氧硫化物，而不会浸出铁，从而进一步诱导SO 4 −和自由基dotOH的形成。在10 mA cm−2的电流密度下，20 min后自由基dotOH的累积浓度为26.83 μM，比仅含CF的电化学体系高约2倍。在这个HEF系统中，SO 4-和自由基dotOH的估计稳态浓度分别高达7.37 × 10−4μM和2.44 × 10−4μM。该体系在较宽的pH范围内（3-9）对蒽（ANT）的降解率均大于80%，且可重复使用6次以上。ANT的主要降解产物为蒽醌等4种羟基化产物。该研究为FeS 2在HEF工艺中的应用提供了一个新的方面，有望成为一种高效的水处理工艺。
In the present study, pyrite modified carbon felt (FeS2/CF) was used as cathode in electrochemical advanced oxidation for the first time. The FeS2/CF cathode can provide Fe(II) and oxysulfide continuously through this sulfite coupling heterogeneous electro-Fenton (HEF) process without leaching of iron, which further induced the formation of SO4∙−and radical dotOH. The cumulative concentration of radical dotOH was 26.83 μM after 20 min at the current density of 10 mA cm−2, which was about twice higher than that in the electrochemical system with CF only. The estimated steady-state concentrations of SO4∙−and radical dotOH in this HEF system can be as high as 7.37 × 10−4μM and 2.44 × 10−4μM, respectively. This electrochemical system with FeS2/CF cathode shows remarkable efficiency (>80%) for anthracene (ANT) degradation in a wide pH of 3–9, and can be used for at least six times. The major degradation products of ANT were identified as anthraquinone and other four hydroxylated products. The study provides a novel aspect of FeS2in HEF processes, and is expected to be an efficient technology in water treatment processes.
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影响因子：
4.5
作者：
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通讯作者：
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通讯作者：
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作者：
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通讯作者：
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