ZnMnCr-LDHs的制备及其对磷酸盐吸附性能研究
Study on the Preparation of ZnMnCr-LDHs and Their Adsorption Properties for Phosphate
刘畅 1李阳 1张晓静 1崔宝玉 1崔节虎1
作者信息
- 1. 郑州航空工业管理学院,河南 郑州 450046
- 折叠
摘要
以三乙醇胺为碱源,通过水热法制备了三元金属元素ZnMnCr-LDHs纳米材料,用于磷酸盐的吸附;通过使用多种表征仪器,证明纳米材料的成功制备.吸附动力学和吸附热力学结果表明,ZnMnCr-LDHs纳米材料吸附磷酸盐符合准二级动力学模型,化学吸附在吸附过程中占主导,为自发的吸热反应.考察各种条件下的吸附能力,在25 ℃、初始pH的条件下,向20 mL(100 mg/L)磷酸盐溶液中投加15 mg的ZnMnCr-LDHs纳米材料,对磷酸盐的去除率分别可达99.5％、99.5％、99.2％;对磷酸盐最大吸附量分别为715.2、714.8、714.7 mg/g;经过5次循环利用后,ZnMnCr-LDHs纳米材料对磷酸盐的吸附率分别为81.8％、76.4％、76.1％,循环性能较好.
Abstract
Ternary metal element ZnMnCr-LDHs nanomaterials were prepared by hydrothermal method for phosphate adsorption using triethanolamine as the base source;the successful preparation of the nanomaterials was demonstrated by using various characterisation instruments.The results of adsorption kinetics and adsorption thermodynamics of ZnMnCr-LDHs nanomaterials show that the reaction during adsorption is a spontaneous heat-absorption reaction,and the quasi-secondary kinetic model is more consistent with the adsorption of phosphate by nanomaterials,and chemisorption dominates.Under the conditions of 25 ℃ and initial pH,15 mg of ZnMnCr-LDHs nanomaterials was injected into 20 mL(100 mg/L)phosphate solution,and the removal rate of phosphate could reach 99.5％,99.5％,and 99.2％,respectively;the maximal adsorption amount of phosphate was 715.2,714.8,and 714.7 The maximum adsorption amount of phosphate was 715.2,714.8,and 714.7 mg/g,respectively;after five times of recycling,the adsorption rate of phosphate by ZnMnCr-LDHs nanomaterials could still be 81.8％,76.4％,and 76.1％,respectively,and the reusability was good.
关键词
ZnMnCr-LDHs/三乙醇胺/磷酸盐/水处理技术/循环再生Key words
ZnMnCr-LDHs/triethanolamine/phosphate/water treatment technology/recycling引用本文复制引用
出版年
2024
NETL
NSTL
维普
万方数据