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

机构：[1] School of Public Health, Gansu University of Chinese Medicine, Gansu, 730000, China; [2] Collaborative Innovation Center of Traditional Chinese Medicine for Prevention and Control of Environmental and Nutrition-Related Disease in Northwest China, Gansu University of Chinese Medicine, Gansu, 730000, China; [3] Zhang Ye People's Hospital Affiliated to University, Gansu, 734000, China

第一机构：甘肃中医药大学公共卫生学院

通信机构：[1]School of Public Health, Gansu University of Chinese Medicine, Gansu, 730000, China|[10735e9d5e7087247e71b]甘肃中医药大学公共卫生学院;[10735]甘肃中医药大学;

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：EI(收录号：20220211454228);Scopus(收录号：2-s2.0-85121284155)

语种：英文

外文关键词：Surface structure - Adsorption - Sodium hydroxide - Thermogravimetric analysis - Copper - Morphology - Plants (botany) - Chemical modification - Wastewater treatment - Metal ions - Sodium Carbonate

摘要：In this paper, a series of bio-adsorbents (LR-NaOH, LR-Na2CO3 and LR-CA) were successfully prepared by modifying Licorice Residue (LR) with NaOH, Na2CO3 and citric acid, and were used as the adsorbents to remove Cu2+ from wastewater. The morphology and structure of bio-adsorbents were characterized by Fourier Transform Infrared, scanning electron microscopy (SEM), thermogravimetry (TG) and X-ray diffraction (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, while LR-NaOH and LR-Na2CO3 significantly enhanced this value up to 43.65 mg/g and 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 a potential approach for use in the water treatment. ? 2021 The Authors