赤泥提铝制备γ-AlOOH吸附剂及其对刚果红的吸附性能研究  

Preparation ofγ-AlOOH Adsorbent from Aluminum Extracted from Red Mud and Its Adsorption Properties for Congo Red

作　　者：尚柯成 李中林 邹婷 李文权 张伟光 李义兵[1,2] SHANG Kecheng;LI Zhonglin;ZOU Ting;LI Wenquan;ZHANG Weiguang;LI Yibing(Department of Materials Science and Engineering,Guilin University of Technology,Guilin 541004,China;Key Laboratory of New Processing Technology for Nonferrous Metals and Materials,Ministry of Education,Guilin University of Technology,Guilin 541004,China)

机构地区：[1]桂林理工大学材料科学与工程学院,广西桂林541004 [2]桂林理工大学有色金属与材料加工新技术教育部重点实验室,广西桂林541004

出　　处：《湿法冶金》2025年第1期91-99,共9页Hydrometallurgy of China

基　　金：国家自然科学基金-联合基金-重点支持项目(U23A20557);广西科技计划项目重大专项(桂科AA23023033-1);广西科技计划项目重大专项(桂科AA22067077)。

摘　　要：研究了以赤泥酸浸所得铝酸钠溶液为原料,通过水热法制备一种具有层状结构的类绣球花状γ-AlOOH吸附剂并用于吸附刚果红。考察了溶液初始pH、刚果红初始质量浓度对吸附的影响,探究了γ-AlOOH对刚果红的吸附机制。结果表明:适宜条件下,刚果红饱和吸附量达1748.15 mg/g;用准二阶动力学模型和Langmuir等温吸附模型描述吸附过程更合适,吸附行为主要以单层吸附为主;吸附过程是自发、吸热且混乱度增大的。该工艺可为解决水体刚果红污染和赤泥堆积提供一种有效的解决方案,符合“以废治废、变废为宝”绿色发展理念,具有一定推广应用价值。A hydrangea-likeγ-AlOOH adsorbent with a layered structure was prepared by hydrothermal method using sodium aluminate solution obtained from acid leaching of red mud as raw material and used for the adsorption of Congo red.The effects of initial pH and initial mass concentration of Congo red on the adsorption were investigated,and the adsorption mechanism ofγ-AlOOH on Congo red was discussed.The results show that the saturated adsorption amount of Congo red can reach 1748.15 mg/g under suitable conditions.The adsorption process is more appropriately described by the quasi-second-order kinetic model and the Langmuir isothermal adsorption model,and the adsorption behaviours are mainly dominated by monolayer adsorption.The adsorption process is spontaneous,heat-absorbing and chaotic with an increasing degree of confusion.The process can provide an effective solution to solve the problem of Congo red pollution and red mud accumulation in the water body,which is in line with the green development concept of treating waste with waste and turning waste into treasure,and has certain value of popularisation and application.

关 键 词：赤泥 铝 γ-AlOOH 吸附剂 制备 刚果红 吸附 

分 类 号：TQ424[化学工程] O647.3[理学—物理化学]