Adsorption of copper ions by fly ash modified through microwaveassisted hydrothermal process 机翻标题: 暂无翻译,请尝试点击翻译按钮。

来源
Journal of Material Cycles and Waste Management
年/卷/期
2019 / 21 / 3
页码
469-477
ISSN号
1438-4957
作者单位
Zhejiang Univ, State Key Lab Clean Energy Utilizat, Hangzhou 310027, Zhejiang, Peoples R China;Zhejiang Univ, State Key Lab Clean Energy Utilizat, Hangzhou 310027, Zhejiang, Peoples R China;Zhejiang Univ, State Key Lab Clean Energy Utilizat, Hangzhou 310027, Zhejiang, Peoples R China;Zhejiang Univ, State Key Lab Clean Energy Utilizat, Hangzhou 310027, Zhejiang, Peoples R China;Zhejiang Univ, State Key Lab Clean Energy Utilizat, Hangzhou 310027, Zhejiang, Peoples R China;Zhejiang Univ, State Key Lab Clean Energy Utilizat, Hangzhou 310027, Zhejiang, Peoples R China;Zhejiang Univ, State Key Lab Clean Energy Utilizat, Hangzhou 310027, Zhejiang, Peoples R China;Zhejiang Hisun Pharmaceut Co Ltd, Hangzhou 311404, Zhejiang, Peoples R China;Zhejiang Hisun Pharmaceut Co Ltd, Hangzhou 311404, Zhejiang, Peoples R China;Zhejiang Hisun Pharmaceut Co Ltd, Hangzhou 311404, Zhejiang, Peoples R China;
作者
Qiu, Qili;Jiang, Xuguang;Lv, Guojun;Chen, Zhiliang;Lu, Shengyong;Ni, Mingjiang;Yan, Jianhua;Lin, Xuliang;Song, Huibo;Cao, Junjun;
摘要
In this study, a microwave-assisted hydrothermal process (MAHP) is used to modify municipal solid waste incineration (MSWI) fly ash. The influences of the dosage, additives, liquid-to-solid ratio (L/S), temperature, and reaction time are investigated in detail, and it is found that the modified fly ash (MFA) exhibits the highest adsorption capacity of Cu2+ (32.05mg/g) when modified under the conditions of 1mol/L Na2HPO4, an L/S ratio of 3mL/g, a reaction temperature of 200 degrees C and a reaction time of 30min. The cation exchange capacity (CEC) of the fly ash remarkably increases from 0.022 to 0.498meq/g after treatment, which is an increase of approximately 22 times. X-ray diffraction results reveal the formation of zeolitic crystals in the MFA. To study the adsorption mechanism, the Cu2+ adsorption isotherms and kinetics are measured. The adsorption behaviors are well described by the Freundlich isotherm equation with a correlation coefficient of 0.986 and by a pseudo-second-order kinetic equation with a correlation coefficient of 0.998. Overall, utilizing MSWI fly ash as adsorbents should receive more attention, and the MAHP is considered to be a promising technology.
机翻摘要
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关键词/主题词
Copper adsorption;MSWI fly ash;Hydrothermal treatment;Microwave;
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