Xie Xiaofeng, Chen Hao, Liu Xudong, Xiang Kaisong, Liu Hui
School of Metallurgy and Environment, Central South University, Changsha 410083, China.
State Key Laboratory of Advanced Metallurgy for Non-Ferrous Metals, Changsha 410083, China.
Materials (Basel). 2023 Apr 17;16(8):3157. doi: 10.3390/ma16083157.
This paper reports on a novel method to remove Hg in the wet scrubbing process using defect-rich colloidal copper sulfides for reducing mercury emissions from non-ferrous smelting flue gas. Unexpectedly, it migrated the negative effect of SO on mercury removal performance, while also enhancing Hg adsorption. Colloidal copper sulfides demonstrated the superior Hg adsorption rate of 306.9 μg·g·min under 6% SO + 6% O atmosphere with a removal efficiency of 99.1%, and the highest-ever Hg adsorption capacity of 736.5 mg·g, which was 277% higher than all other reported metal sulfides. The Cu and S sites transformation results reveal that SO could transform the tri-coordinate S sites into S on copper sulfides surfaces, while O regenerated Cu via the oxidation of Cu. The S and Cu sites enhanced Hg oxidation, and the Hg could strongly bind with tri-coordinate S sites. This study provides an effective strategy to achieve large-capability adsorption of Hg from non-ferrous smelting flue gas.
本文报道了一种在湿式洗涤过程中使用富含缺陷的胶体硫化铜去除汞的新方法，以减少有色金属冶炼烟气中的汞排放。出乎意料的是，它消除了SO对汞去除性能的负面影响，同时还增强了汞的吸附。胶体硫化铜在6%SO + 6%O气氛下表现出306.9μg·g·min的优异汞吸附速率，去除效率为99.1%，以及有史以来最高的汞吸附容量736.5mg·g，比所有其他报道的金属硫化物高277%。Cu和S位点转化结果表明，SO可以将硫化铜表面的三配位S位点转化为S，而O通过Cu的氧化使Cu再生。S和Cu位点增强了汞的氧化，并且汞可以与三配位S位点强烈结合。本研究提供了一种从有色金属冶炼烟气中实现大吸附容量汞吸附的有效策略。
