Cu^(2+)在HPMC改性膨润土中的吸附和扩散行为  

Diffusion and Adsorption of Copper Ion in HPMC-modified Bentonite

作　　者：王宝[1,2] 胡业昊 朱佳佳 张迪 周浩然[1] WANG Bao;HU Ye-hao;ZHU Jia-jia;ZHANG Di;ZHOU Hao-ran(School of Environmental&Municipal Engineering,Xi’an University of Architecture and Technology,Xi’an 710055,China;Shaanxi Key Laboratory of Geotechnical and Underground Space Engineering,Xi’an University of Architecture and Technology,Xi’an 710055,China)

机构地区：[1]西安建筑科技大学环境与市政工程学院,西安710055 [2]西安建筑科技大学陕西省岩土与地下空间工程重点实验室,西安710055

出　　处：《长江科学院院报》2025年第4期127-133,共7页Journal of Changjiang River Scientific Research Institute

基　　金：国家自然科学基金项目(41602291)。

摘　　要：开展穿透扩散试验(Through-Diffusion Test),研究重金属Cu^(2+)在羟丙基甲基纤维素(HPMC)改性膨润土中的吸附和扩散行为,并与未改性膨润土进行比较。同时,使用污染物运移模拟软件Pollute V7.0定量评估HPMC改性对膨润土截污性能的影响。研究结果表明,当HPMC的添加量为2%和5%时,Cu^(2+)在膨润土上的吸附量分别减小了40%和46%,而扩散速度分别降低了7%和34%。Pollute V7.0的模拟计算结果显示,添加2%和5%的HPMC,可将膨润土对Cu^(2+)的截污性能分别提高1.32倍和2.58倍。研究结果可为HPMC改性膨润土截污性能评估提供基础参数。A series of through-diffusion tests were carried out to explore the diffusion and adsorption behaviors of Cu^(2+)in bentonites modified with hydroxypropyl methylcellulose(HPMC).The test results were compared with those of untreated bentonite.Pollute V7.0 was employed to quantitatively evaluate the impact of HPMC on the performance of bentonite in intercepting Cu^(2+).The diffusion test results indicated that when the HPMC content reached 2%and 5%,the capacity of bentonite adsorbing Cu^(2+)decreased by 40%and 46%,respectively,while the diffusion coefficient of Cu^(2+)dropped by 7%and 34%,correspondingly.The results from Pollute V7.0 demonstrated that adding 2%and 5%HPMC to sodium bentonite enhanced the performance of bentonite for adsorbing Cu^(2+)by factors of 1.34 and 2.03,respectively.Overall,the findings of this study offer valuable information for assessing the performance of HPMC-modified bentonite.

关 键 词：土工复合膨润土衬垫 膨润土 羟丙基甲基纤维素 扩散 吸附 

分 类 号：TU57[建筑科学—建筑技术科学]