文献类型：期刊文献

英文题名：Preparation of bio-absorbents by modifying licorice residue via chemical methods and removal of copper ions from wastewater

作者：Yin, Xiaochun[1,2];Zhang, Nadi[3];Du, Meixia[1];Zhu, Hai[1];Ke, Ting[1]

第一作者：殷晓春

通信作者：Yin, XC[1];Yin, XC[2]

机构：[1]Gansu Univ Chinese Med, Sch Publ Hlth, Lanzhou 730000, Gansu, Peoples R China;[2]Gansu Univ Chinese Med, Collaborat Innovat Ctr Tradit Chinese Med Prevent, Lanzhou 730000, Gansu, Peoples R China;[3]Zhang Ye Peoples Hosp, Lanzhou 734000, Gansu, Peoples R China

第一机构：甘肃中医药大学公共卫生学院

通信机构：[1]corresponding author), Gansu Univ Chinese Med, Sch Publ Hlth, Lanzhou 730000, Gansu, Peoples R China;[2]corresponding author), Gansu Univ Chinese Med, Collaborat Innovat Ctr Tradit Chinese Med Prevent, Lanzhou 730000, Gansu, Peoples R China.|[10735]甘肃中医药大学;[10735e9d5e7087247e71b]甘肃中医药大学公共卫生学院;

年份：2021

卷号：84

期号：12

起止页码：3528

外文期刊名：WATER SCIENCE AND TECHNOLOGY

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000709919300001)】；

基金：This work has been supported by Innovation Fund Project of Higher Education in Gansu Province (2021B-159).

语种：英文

外文关键词：adsorbent; Cu2+; licorice residue; modification; wastewater

摘要：In this paper, a series of bio-adsorbents (LR-NaOH, LR-Na2CO3 and LR-CA) were successfully prepared by modifying Licorice Residue with NaOH, Na2CO3 and citric acid, which were used as the adsorbents to remove Cu2+ from wastewater. The morphology and structure of bio-adsorbents were characterized by Fourier Transform Infrared, SEM, TG and XRD. Using static adsorption experiments, the effects of the adsorbent dosage, the solution pH, the adsorption time, and the initial Cu2+ concentration on the adsorption performance of the adsorbents were investigated. The results showed that the adsorption process of Cu2+ by the bio-adsorbents can be described by pseudo-second order kinetic model and the Langmuir model. The surface structure of the LR-NaOH, LR-Na2CO3 and LR-CA changed obviously, and the surface-active groups increased. The adsorption capacity of raw LR was 21.56 mg/g, LR-NaOH, LR- Na2CO3 significantly enhanced this value up to 43.65 mg/g, 43.55 mg/g, respectively. After four adsorption-desorption processes, the adsorption capacity of LR-NaOH also maintained about 73%. Therefore, LR-NaOH would be a promising adsorbent for removing Cu2+ from wastewater, and the simple strategy towards preparation of adsorbent from the waste residue can be as a potential approach using in the water treatment. HIGHLIGHTS Licorice Residue-based biological adsorbents with the ability to remove heavy metal ions were fabricated. The Cu2+ ions in the water were easily removed using the bio-adsorbents which were made by this study. The adsorption capacity of Licorice Residue which was modified by NaOH maintained above 73% after 4 cycles.