摘要
以铜渣为原料、NaOH和水玻璃溶液为活化剂合成Fe_(3)O_(4)@GM(铁基地聚合物),通过CTAB(十六烷基三甲基溴化铵)对Fe_(3)O_(4)@GM进行表面功能化构筑CTAB-Fe_(3)O_(4)@GM,并将其作为吸附剂高效去除水体中的Cr(Ⅵ)。重点探究初始溶液pH值、CTAB-Fe_(3)O_(4)@GM投加量对Cr(Ⅵ)吸附性能的影响,通过吸附动力学、热力学以及Zeta、XPS、BET等表征手段对吸附机理进行解析。结果表明:CTAB-Fe_(3)O_(4)@GM对Cr(Ⅵ)的吸附过程更符合拟二级动力学模型(R^(2)=0.99)和Langmuir等温线模型(R^(2)=0.99),在pH=1和0.1 g/L投加量下,吸附量为156.50 mg/g。CTAB-Fe_(3)O_(4)@GM对Cr(Ⅵ)的去除过程以化学吸附为主,包括络合作用、静电吸引、氧化还原、孔隙沉淀等作用机制。研究遵循“以废治废”的环保理念,对利用固体废弃物合成高效吸附剂的资源化利用和污水净化处理都具有良好的经济效益和环境效应。
Fe_(3)O_(4)@GM(iron-base geopolymer)was synthesized by copper slag as raw material,NaOH and water glass solution as activators,and then was modified with surfactant CTAB(cetyltrimethylammonium bromide)to construct CTAB-Fe_(3)O_(4)@GM.The synthesized CTAB-Fe_(3)O_(4)@GM was used as an adsorbent to efficiently remove Cr(Ⅵ)in water.The effects of pH and CTAB-Fe_(3)O_(4)@GM dosage on Cr(Ⅵ)adsorption performance were mainly explored,and its adsorption mechanism was analyzed through adsorption kinetics,thermodynamics,Zeta,XPS and BET.The results show that the adsorption process follows pseudo-second-order kinetics(R^(2)=0.99)and conforms to the Langmuir isotherm model(R^(2)=0.99),achieving a maximum adsorption capacity of 156.50 mg/g at pH=1 and 0.1 g/L CTAB-Fe_(3)O_(4)@GM.The removal process of Cr(Ⅵ)by CTAB-Fe_(3)O_(4)@GM is primarily based on chemical adsorption,including complexation,electrostatic attraction,redox and pore precipitation mechanisms.This study follows the eco-friendly concept of“waste control”,demonstrating favorable economic and environmental benefits for the resource utilization and wastewater purification of solid waste-derived high-efficiency adsorbents.
作者
黄婷
单书月
罗中秋
周新涛
陆艳
蔡秀楠
HUANG Ting;SHAN Shuyue;LUO Zhongqiu;ZHOU Xintao;LU Yan;CAI Xiunan(Faculty of Chemical Engineering,Kunming University of Science and Technology,Kunming 650500,Yunnan Province,China;Yunnan Lufeng Industrial Park Management Committee,Chuxiong 651200,Yunnan Province,China)
出处
《化学工程》
北大核心
2026年第1期7-12,19,共7页
Chemical Engineering(China)
基金
国家自然科学基金资助项目(22406075)
云南省基础研究专项-面上项目(202501AT070376,202401AT070384)
云南省“兴滇英才支持计划”青年人才专项(YNWR-QNBJ-2020-063)。
