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针对水体中低浓度硝酸盐污染问题,采用化学氧化-热解方法构建一种铜氧化物(Cu_xO-CF)催化电极,用于电催化还原硝酸盐。通过同步调控NO3~-耦合与H*供给,驱动硝酸盐沿吸附—脱氧—氢化—氯氧化路径间接转化为N2(NO3~-→NH4~+→N2)。实验结果表明,在电流密度为50 mA/cm2、初始pH为7和Cl~-浓度为1 000 mg/L的条件下,该电极对15 mg/L的模拟NO3~--N废水可实现94.8%的NO3~-去除率和99.2%的N2选择性。此外,在处理总氮浓度为8.96 mg/L的实际地表水时,总氮去除率达到97.5%。
Abstract：In order to solve the issue of low-concentration nitrate pollution in water bodies, herein, a copper oxide(CuxO-CF) catalytic electrode was constructed via a chemical oxidation-pyrolysis method for nitrate electroreduction. This electrode synchronously regulates NO3~- adsorption and H* supply, driving the indirect conversion of nitrate to N2 along an adsorption—deoxygenation—hydrogenation-chlorination pathway(NO3~-→NH4~+→N2). The NO3~- removal rate of 94.8% with N2 selectivity of 99.2% is achieved for treating 15 mg/L simulated NO3~--N wastewater at current density of 50 m A/cm2, initial pH of 7, and Cl-concentration of 1 000 mg/L. Furthermore, the CuxO-CF electrode achieved the TN removal rate of 97.5% when treating actual surface water containing 8.96 mg/L TN.
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基本信息:
DOI：10.13358/j.issn.2096-9309.2026.0130.01
中图分类号:X703
引用信息:
[1]杨帆,张尊举,熊广森.Cu_xO-CF电极处理低浓度硝酸盐废水效果研究[J].河北环境工程学院学报,2026,36(02):71-80.DOI:10.13358/j.issn.2096-9309.2026.0130.01.
基金信息:
河北省高等学校科学技术研究项目（QN2024008）; 秦皇岛市科学技术研究与发展计划（202401A102）
2026-04-13
2026-04-13
2026-04-13