raybet体育在线 院报 ›› 2025, Vol. 42 ›› Issue (4): 127-126.DOI: 10.11988/ckyyb.20240104

• 岩土工程 • 上一篇    下一篇

Cu2+在HPMC改性膨润土中的吸附和扩散行为

王宝1,2(), 胡业昊1, 朱佳佳1, 张迪1, 周浩然1   

  1. 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
  • 收稿日期:2024-01-29 修回日期:2024-03-31 出版日期:2025-04-01 发布日期:2025-04-01
  • 作者简介:

    王 宝(1983-),江苏东海人,副教授,博士,主要从事固体废物处理与处置方面的研究工作。E-mail:

  • 基金资助:
    国家自然科学基金项目(41602291)

Diffusion and Adsorption of Copper Ion in HPMC-modified Bentonite

WANG Bao1,2(), HU Ye-hao1, ZHU Jia-jia1, ZHANG Di1, ZHOU Hao-ran1   

  1. 1 School of Environmental & Municipal Engineering, Xi’an University of Architecture and Technology, Xi’an 710055,China
    2 Shaanxi Key Laboratory of Geotechnical and Underground Space Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, China
  • Received:2024-01-29 Revised:2024-03-31 Published:2025-04-01 Online:2025-04-01

摘要:

开展穿透扩散试验(Through-Diffusion Test),研究重金属Cu2+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,Cu2+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Cu2+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。

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

Abstract:

A series of through-diffusion tests were carried out to explore the diffusion and adsorption behaviors of Cu2+ 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 Cu2+. The diffusion test results indicated that when the HPMC content reached 2% and 5%, the capacity of bentonite adsorbing Cu2+ decreased by 40% and 46%, respectively, while the diffusion coefficient of Cu2+ 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 Cu2+ 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.

Key words: geosynthetic clay liners, bentonite, hydroxypropyl methylcellulose, diffusion, adsorption

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