氨基硅烷改性膨润土对Cr(Ⅵ)的吸附性能  

Adsorption Properties of Aminosilane-Modified Bentonite for Cr(Ⅵ)

作　　者：孙志勇[1] 于明远 吴喜军 张俊霞 孙剑平[2] Sun Zhiyong;Yu Mingyuan;Wu Xijun;Zhang Junxia;Sun Jianping(School of Energy Engineering,Yulin University,Yulin,Shaanxi 719000;School of Municipal and Environmental Engineering,Shenyang Jianzhu University,Shenyang,Liaoning 110168;School of Architecture and Engineering,Yulin University,Yulin,Shaanxi 719000;School of Mechanical and Energy Engineering,Shaoyang University,Shaoyang,Hu’nan 422000)

机构地区：[1]榆林学院能源工程学院,陕西榆林719000 [2]沈阳建筑大学市政与环境工程学院,辽宁沈阳110168 [3]榆林学院建筑工程学院,陕西榆林719000 [4]邵阳学院机械与能源工程学院,湖南邵阳422000

出　　处：《非金属矿》2023年第1期82-85,共4页Non-Metallic Mines

基　　金：国家自然科学基金(52064048);陕西省科技创新团队(2022TD-08)。

摘　　要：在膨润土(Bent)表面接枝3-氨丙基三乙氧基硅烷(APTES),制备氨基改性膨润土(APTES/Bent),考察其对Cr(Ⅵ)的吸附性能。结果表明,APTES/Bent吸附Cr(Ⅵ)最佳p H值为2;拟二级动力学模型对吸附拟合更好;Langmuir模型可较好地拟合Cr(Ⅵ)在APTES/Bent上的等温吸附过程;热力学分析表明该吸附过程属自发吸热过程;5次循环再生后,APTES/Bent对Cr(Ⅵ)仍有较好的吸附量,吸附量为29.47 mg/g。APTES/Bent是一种具有应用潜力的Cr(Ⅵ)吸附剂。Amino-modified bentonite(APTES/Bent)was prepared by grafting 3-aminopropyltriethoxysilane(APTES)on the surface of bentonite(Bent),and its adsorption performance for Cr(Ⅵ)was investigated.The results showed that APTES was successfully grafted on bentonite;the optimum pH for the adsorption of Cr(Ⅵ)by APTES/Bent was 2;the pseudo-second-order kinetic model fitted better for the adsorption;the Langmuir model could better fit Cr(Ⅵ)adsorption isotherm process on APTES/Bent;thermodynamic analysis showed that the adsorption process was a spontaneous endothermic process;after 5 cycles of regeneration,APTES/Bent still had a good adsorption capacity for Cr(Ⅵ),which was 29.47 mg/g,APTES/Bent is a potential Cr(Ⅵ)adsorbent.

关 键 词：氨基硅烷 膨润土 Cr(Ⅵ) 吸附 

分 类 号：X703[环境科学与工程—环境工程] TQ424[化学工程]