文献类型：期刊文献

英文题名：A novel gallic acid-grafted-lignin biosorbent for the selective removal of lead ions from aqueous solutions

作者：Zhang, Xueyan[1] Jin, Can[1] Jiang, Yuliang[2] Liu, Guifeng[1] Wu, Guomin[1] Kong, Zhenwu[1]

第一作者：Zhang, Xueyan

通信作者：Jin, Can|[a0005504cbf01dce45071]金灿;

机构：[1] Institute of Chemical Industry of Forest Products, Chinese Academy of Forestry, National Engineering Laboratory for Biomass Chemical Utilization, Key Laboratory of Biomass Energy and Material of Jiangsu Province, Nanjing, 210042, China; [2] School of Chemistry and Materials Science, Nanjing Normal University, Nanjing, 210097, China

年份：2017

卷号：12

期号：3

起止页码：5343-5357

外文期刊名：BioResources

收录：EI(收录号：20173204021437);Scopus(收录号：2-s2.0-85026789663)

语种：英文

外文关键词：Dyes - Metal ions - Nuclear magnetic resonance spectroscopy - Solutions - Chemicals removal (water treatment) - Lead compounds - Adsorption - Water pollution - Grafting (chemical) - Heavy metals - Isotherms

摘要：The low content of phenolic groups limits the application of lignin-based materials as biosorbents for the removal of metal ions. In this work, a novel gallic acid-grafted-lignin (GAL, 4.43 mmol/g hydroxyl group) biosorbent was designed by introducing gallic acid moieties to replace the hydroxyl groups of lignin. These grafted polyphenolic groups provide additional sites for the adsorption of metal ions. The structure of GAL was characterized by FT-IR, 31P NMR, and 13C NMR spectroscopy. The adsorption properties of GAL for Pb(II) ions were investigated under batch conditions. Kinetic and isothermal adsorption processes could be well-described by the pseudo-second order kinetic model and Langmuir isothermal model, respectively. The grafting of polyphenolic groups onto lignin increased the maximum adsorption capacity of the adsorbent for Pb(II) (119.1 mg/g). The adsorption thermodynamics indicated that the adsorption process was endothermic and spontaneous. In addition, GAL could selectively adsorb Pb(II) with a selectivity coefficient (k) at 1.89 in the presence of coexisting metal ions from aqueous solution. The high adsorption capacity and selectivity for Pb(II) by GAL, together with its environmental compatibility, enable this material to act as a promising biosorbent for removing heavy metal ions from polluted water.