中南民族大学学报（自然科学版）2025，Vol.44Issue(5)：577-583,7.DOI:10.20056/j.cnki.ZNMDZK.20250806
改性生物炭强化电容去离子技术去除Cu2+
Enhanced capacitive deionization performance of modified biochar for Cu2+removal
摘要
Abstract
Peanut shells were used as the precursor to successfully prepare a biochar product(HMC-3)with a high specific surface area(1619 m2·g-1)and an enriched hierarchical porous structure via a hydrothermal pretreatment and molten salt activation process.The HMC-3 fabricated electrode showed a low charge-transfer resistance(2.87 Ω)and a high specific capacitance up to 251 F·g-1 at a current density of 0.2 A·g-1,demonstrating good electrical conductivity and capacitive performance.When applied as an electrode for CDI(capacitive deionization)system,the removal efficiency of Cu2+reached 95.9%with an adsorption capacity of 64.7 mg·g-1 under a working voltage of 1.4 V and a flow rate of 2 mL·min-1.In addition,the Cu2+removal of the system remained above 89%after 5 consecutive cycles,suggesting excellent stability.It provided a new strategy for preparing green CDI electrode material with high efficiency.关键词
电容去离子/生物炭/重金属离子/水热-熔盐活化Key words
capacitive deionization/biochar/heavy metal ions/hydrothermal-molten salt activation分类
环境科学引用本文复制引用
罗芝鹏,张婧懿,马子晨,杨铠菲,刘紫杰,汤迪勇..改性生物炭强化电容去离子技术去除Cu2+[J].中南民族大学学报（自然科学版）,2025,44(5):577-583,7.基金项目
国家自然科学基金资助项目(21908252) （21908252）
中央高校基本科研业务费专项资金资助项目(CZQ21014) （CZQ21014）
