超声辅助活化煤基电极材料的研究

Ultrasound-assisted activation of coal-based electrode materials

采用超声辅助活化提高煤基电极材料的吸附性能,并利用扫描电子显微镜(SEM)观测煤基电极材料的形貌特征,N2物理吸附法检测孔径参数。结果表明,随着KOH质量分数的增加,煤基电极材料的抗压强度呈现降低趋势,而碘吸附值逐渐增大,最高可达741.44 mg/g。选择超声辅助、KOH质量分数为15%的煤基电极材料进行氰化废水吸附处理,其比表面积为386m^2/g,总孔容为0.192 cm^3/g,微孔孔容为0.170 cm^3/g,微孔率达到88.31%。以煤基电极材料为阴阳极组建三维电极体系处理氰化废水,外加电压为4 V,吸附时间为4 h,废水中各离子的去除率均达到95%以上。

Ultrasound-assisted activation is developed to improve the adsorption property of coal-based electrode materials.Scanning electron microscopy（SEM） is used to analyze the morphology and surface structure of coal-based electrode materials.N2 adsorption method is used to measure materials＇ pore size parameters.It is found that with the increase of KOH content,the compressive strength of coal-based electrode materials tends to decrease while the iodine adsorption value gradually increases up to 741.44 mg·g^-1.Ultrasound assisted conditions can strengthen this change rule.The coal-based electrode material with a KOH addition of 15% and under ultrasound assisted conditions is selected as the adsorption treatment material for cyanides-containing wastewater.This material has a specific surface area of 386 m^2·g^-1,a total pore volume of 0.192 cm^3·g^-1,a micro-pore volume of 0.170 cm^3·g^-1 and a micro porosity of 88.31%.It is set as the anode and cathode in a three-dimensional electrode system to treat with cyanides-containing wastewater.The removal rate of every ion in the wastewater exceeds 95% when voltage is 4 V and adsorption time is 4 h.