聚合物改性钙基膨润土制备工艺对水力性能的影响

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摘要以钙基膨润土为原土,聚丙烯酸钠为聚合物添加剂,采用干混、湿混、物理捏合和原位聚合法制备改性膨润土.通过自由膨胀和改进滤失试验,评估了酸性矿山废水作用下制备工艺对改性膨润土水力性能的影响.结果表明,在酸性矿山废水作用下,干混、湿混和物理捏合法制备的改性膨润土膨胀指数较原土增大1.1~4倍,滤失量、渗透系数增大2.7~5.3倍和1.4~2.4倍,原位聚合法制备的改性膨润土膨胀指数较原土增大4倍,滤失量、渗透系数下降30%和97%.改性膨润土在酸性矿山废水中的水力性能如下:原位聚合>物理捏合>湿混>干混.场地污染较轻、材料应用成本有限时,可采用干混制备工艺;场地污染严重、污染物管控严格时,可采用原位聚合制备工艺.

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	刘骏逸
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	董浩然

关键词 ：聚合物改性膨润土, 制备工艺, 土工合成黏土衬垫, 酸性矿山废水, 水力性能

Abstract：Sodium polyacrylate amended Ca-bentonites (PAAS-CaBs) were prepared by dry mixing, wet mixing, wet kneading and in-situ polymerization. The hydraulic properties of polymer enhanced bentonites under acidic mine drainage solution (AMD) were investigated by swell index and modified fluid loss tests. When tested with AMD, values of swell index, fluid loss and hydraulic conductivity of PAAS-CaBs prepared by dry-mixing, wet-mixing and wet-kneading increased by factors of 1.1~4, 2.7~5.3, and 1.4~2.4, respectively, whereas that of PAAS-CaBs prepared by in-situ polymerization increased by a factor of 4 and decreased by 30% and 97%, comparing to the unamended CaBs. In general, the hydraulic properties of polymer enhanced bentonites under AMD solution deteriorate in the following order: in-situ polymerization > wet-kneading > wet-mixing > dry-mixing. The dry-mixing method is recommended for scenarios with mild contamination and limited budget, whereas the in-situ polymerization method is recommended for scenarios with severe contamination and high-level criteria of pollution control.

Key words： polymer enhanced bentonite manufacture method geosynthetic clay liner acidic mine drainage hydraulic performance

收稿日期: 2024-03-19

PACS:

X705

基金资助:国家自然科学基金资助项目(42077241);国家重点研发计划项目(2019YFC1806000);国家自然科学基金资助项目(2308382)

通讯作者: 李育超,教授,liyuchao@zju.edu.cn E-mail: liyuchao@zju.edu.cn

作者简介: 刘骏逸(1997-),男,广西南宁人,浙江大学硕士研究生,主要从事环境岩土工程研究.发表论文1篇.liujunyi0728@126.com.

引用本文:

刘骏逸, 仝杉, 李育超, 李静静, 董浩然. 聚合物改性钙基膨润土制备工艺对水力性能的影响[J]. 中国环境科学, 2024, 44(10): 5696-5704. LIU Jun-yi, TONG Shan, LI Yu-chao, LI Jing-jing, DONG Hao-ran. Impact of manufacture method on the hydraulic performance of polymer-enhanced calcium bentonites. CHINA ENVIRONMENTAL SCIENCECE, 2024, 44(10): 5696-5704.

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http://www.zghjkx.com.cn/CN/ 或 http://www.zghjkx.com.cn/CN/Y2024/V44/I10/5696

[1] 宋明媚,张海亮,董洋.国际有色金属价格波动对中国产业链的传导机制与效应——基于双层复杂网络模型[J]. 资源科学, 2023, 45(4):812-826. Song M M, Zhang H L, Dong Y. Transmission mechanism and effect of international nonferrous metal price fluctuation to China’s industrial chain: Based on a two-layer complex network model [J]. Resources Science, 2023,45(4):812-826.
[2] 张光玉,尹振香,路家超.有色金属冶炼行业发展及近况探讨[J]. 中国金属通报, 2019,27(6):15,17. Zhang G Y, Yin Z X, Lu J C. Development and recent situation of non-ferrous metal smelting industry [J]. China Metal Bulletin, 2019, 27(6):15,17.
[3] Akcil A, Koldas S. Acid Mine Drainage (AMD): causes, treatment and case studies [J]. Journal of Cleaner Production, 2006,14(12/13):1139- 1145.
[4] Yeo S S, Shackelford C D, Evans J C. Consolidation and hydraulic conductivity of nine model soil-bentonite backfills [J]. Journal of Geotechnical and Geoenvironmental Engineering, 2005,131(10):1189- 1198.
[5] 舒锋,宋双艳.我国膨润土开发利用现状和对策建议[J]. 中国非金属矿工业导刊, 2021,41(6):24-26. Shu F, Song S Y. Development and utilization of bentonite in China and countermeasures [J]. China Non-metallic Minerals Industry, 2021, 41(6):24-26.
[6] Mazzieri F, Di Emidio G, Pasqualini E. Effect of wet-and-dry ageing in seawater on the swelling properties and hydraulic conductivity of two amended bentonites [J]. Applied Clay Science, 2017,142:40-51.
[7] Scalia J, Bohnhoff G L, Shackelford C D, et al. Enhanced bentonites for containment of inorganic waste leachates by GCLs [J]. Geosynthetics International, 2018,25(4):1-56.
[8] Scalia J, Benson C H, Bohnhoff G L, et al. Long-term hydraulic conductivity of a bentonite-polymer composite permeated with aggressive inorganic solutions [J]. Journal of Geotechnical and Geoenvironmental Engineering, 2013,140(3):04013025.
[9] Kolstad D C, Benson C H, Edil T B, et al. Hydraulic conductivity of a dense prehydrated GCL permeated with aggressive inorganic solutions [J]. Geosynthetics International, 2014,11(3):233-241.
[10] Norris A, Aghazamani N, Scalia J, et al. Hydraulic performance of geosynthetic clay liners comprising anionic polymer-enhanced bentonites [J]. Journal of Geotechnical and Geoenvironmental Engineering, 2022,148(6):04022039.
[11] Chen X, Tan Y, Complend T, et al. Polymer elution and hydraulic conductivity of polymer-bentonite geosynthetic clay liners to bauxite liquors [J]. Applied Clay Science, 2023,242:107039.
[12] 杨微,任孟健,陈仁朋,等.复杂环境条件下改性膨润土的抗盐性能[J]. 浙江大学学报(工学版), 2021,55(10):1885-1893. Yang W, Ren M J, Chen R P, et al. Salt resistance of modified bentonite in complex environment [J]. Journal of Zhejiang University (Engineering Science), 2021,55(10):1885-1893.
[13] 郭子赫,姜璐莎,王昆,等.干湿循环作用下聚合物改性膨润土渗透特性研究[J]. 土木工程学报, 2023,56(S1):55-63. Guo Z H, Jiang L S, Wang K, et al. Hydraulic conductivity of polymer-modified bentonite under wet-dry cycles [J]. China Civil Engineering Journal, 2023,56(S1):55-63.
[14] 康祺祯.酸碱盐溶液对聚丙烯酸钠改性钙基膨润土水化与渗透特性影响的研究[D]. 杭州:浙江大学, 2021. Kang Q Z. Study on the effect of acid/base/salt solution on the hydration and hydraulic properties of sodium polyacrylate modified calcium bentonite [D]. Hangzhou: Zhejiang University, 2021.
[15] ASTM D 5890 Standard Test Method for Clay Liners Swell Index of Clay Mineral Component of Geosynthetic [S].
[16] Chung J, Daniel D E. Modified fluid loss test as an improved measure of hydraulic conductivity for bentonite [J]. Geotechnical Testing Journal, 2008,31(3):243-251.
[17] ASTM D 5891 standard test method for fluid loss of clay component of geosynthetic clay liners [S].
[18] Hayati-Ashtiani M. Use of FTIR spectroscopy in the characterization of natural and treated nanostructured bentonites (montmorillonites) [J]. Particulate Science and Technology, 2012,30(6):553-564.
[19] 王寿武,邓应淼,周雪婷,等.聚丙烯酸钠的合成及性能研究[J]. 精细石油化工进展, 2010,11(5):42-49. Wang S W, Deng Y S, Zhou X T, et al. Synthesis and properties of sodium polyacrylate [J]. Advances in Fine Petrochemicals, 2010, 11(5):42-49.
[20] 翁诗甫.傅里叶变换红外光谱分析[M]. 北京:化学工业出版社, 2010. Weng S F. Fourier transform infrared spectral analysis [M]. Beijing: Chemical industry publishing, 2010.
[21] Essomba J S, Jaya P A, Placide D B B, et al. Clay/polymer nanocomposites as filler materials for leather [J]. Journal of Cleaner Production, 2019,237:117837.
[22] Kong W, Yue Q, Gao Y, et al. Enhanced photodegradation of sulfadimidine via PAA/g-C3N4-FeO polymeric catalysts under visible light [J]. Chemical Engineering Journal, 2020,413:127456.
[23] Guo Y S, Mi Y F, Ji Y L, et al. One-step surface grafting method for preparing zwitterionic nanofiltation membrane via in-situ introduction of initiator in interfacial polymerization [J]. Acs Applied Polymer Materials, 2019,1(5):1022-1033.
[24] Pourjavadi A, Barzegar S, Zeidabadi F. Synthesis and properties of biodegradable hydrogels of κ-carrageenan grafted acrylic acid-co-2- acrylamido-2-methylpropanesulfonic acid as candidates for drug delivery systems [J]. Reactive and Functional Polymers, 2007,67(7): 644-654.
[25] Di Emidio G, Mazzieri F, Verastegui-Flores R D, et al. Polymer- treated bentonite clay for chemical-resistant geosynthetic clay liners [J]. Geosynthetics International, 2015,22(1):125-137.
[26] Shi F J, Feng S J, Zheng Q T, et al. Effect of polyanionic cellulose modification on properties and microstructure of calcium bentonite [J]. Applied clay science, 2022,228:106633.
[27] Scalia J, Benson C H. Polymer fouling and hydraulic conductivity of mixtures of sodium bentonite and a bentonite-polymer composite [J]. Journal of Geotechnical and Geoenvironmental Engineering, 2017, 143(4):04016112.
[28] JG/T 193-2006钠基膨润土防水毯[S]. JG/T 193-2006 Sodium bentonite geosynthetic clay liner [S].
[29] 祝和权,刘继武,李海燕,等.膨润土防水毯的研制及其在垃圾填埋场中的应用[J]. 新型建筑材料, 2004,11(1):37-39. Zhu H Q, Liu J W, Li H Y, et al. Research and development of bentonite geosynthetic clay liner and its application in landfills [J]. New Building Materials, 2004,11(1):37-39.