文献类型：期刊文献

英文题名：Integrated structural and chemical analyses for HCl-supported hydrochar and their adsorption mechanisms for aqueous sulfachloropyridazine removal

作者：Liu, Lin[1];Sim, Siong Fong[2];Lin, Sen[1];Wan, Jiang[1];Zhang, Wei[1];Li, Qiannan[1];Peng, Cheng[1]

机构：[1]East China Univ Sci & Technol, Sch Resource & Environm Engn, State Environm Protect Key Lab Environm Risk Asse, Shanghai 200237, Peoples R China;[2]Univ Malaysia Sarawak, Fac Resource Sci & Technol, Sarawak 94300, Malaysia

年份：2021

卷号：417

外文期刊名：JOURNAL OF HAZARDOUS MATERIALS

收录：;EI(收录号：20212110402625);WOS:【SCI-EXPANDED(收录号:WOS:000668987700007)】；

基金：This research was supported by projects of the National Key Research and Development Program of China (2019YFC1805200, 2018YFC1800600) , and the National Natural Science Foundation of China (21737005, 41371467) . Professor Zhemin Shen and Dr. Xiaoping Gao in Shanghai Jiaotong University helped to calculate Mulliken charges of SCP molecules.

语种：英文

外文关键词：Sulfachloropyridazine; Hydrochar; Functional group; Adsorption mechanism

摘要：In this study, various HCl-supported hydrochar made from root powder of long-root Eichhornia crassipes were applied to adsorb aqueous sulfachloropyridazine (SCP). Adsorption capacity (qe mu g g- 1) was positively correlated with combined severity-CS. With CS increasing, carbonization degree, hydrophobicity, porosity and isoelectric point of hydrochar increased, but content of polar functional groups decreased. Hydrophobic interaction was important for SCP adsorption. A 24 x 36 peak area table was generated from 24 FT-IR absorbance spectra computed by peak detection algorithm. Afterwards, correlation analysis between qe mu g g-1 and FT-IR peak area were conducted, indicating that wavenumbers at 555.4, 1227.47, 1374.51, 1604.5, 2901.4/2919.2 and 3514.63 cm-1 were helpful for SCP adsorption. Further, multivariate linear regression analyses showed that aromatic skeleton and phenolic hydroxyl were the two biggest contributors. Electrostatic attraction did not exist during the SCP adsorption process. Under strong acid condition, protonated amino groups in cationic SCP acting as a hydrogen donator interacted with electron-rich functional groups onto hydrochar by Hydrogen interaction. Under weak acid condition, neutral SCP served as an 7C electron donor to bond with hydrochar by 7C-7C electron donator-acceptor interaction. This work could guide the functional groups modification strategy of hydrochar to make better use of it in water purification field.