黄原胶-粉煤灰联合处理酸污染土试验研究

倪静; 韩晓婷; 贺青青; 耿雪玉

doi:10.11988/ckyyb.20221529

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长江科学院院报 ›› 2024, Vol. 41 ›› Issue (4) : 111-118. DOI: 10.11988/ckyyb.20221529

岩土工程

黄原胶-粉煤灰联合处理酸污染土试验研究

倪静¹, 韩晓婷¹, 贺青青¹, 耿雪玉²

作者信息 +

Experimental Study on Combined Xanthan Gum and Fly Ash Treatment on Acid-contaminated Soils

NI Jing¹, HAN Xiao-ting¹, HE Qing-qing¹, GENG Xue-yu²

Author information +

文章历史 +

摘要

绿色环保型生物聚合物黄原胶应用于岩土工程,可提高土体强度及抗风蚀、水蚀能力。鉴于黄原胶分子中的丙酮酸基团和糖苷键在酸性土壤条件下易水解,导致凝胶黏性减小、固土效果减弱,拟采用碱性材料粉煤灰协同黄原胶固化酸污染土,并开展液塑限、击实及无侧限抗压强度试验。结果表明:粉煤灰有助于提高固化土的塑限、最优含水率及最大干密度。酸性土壤条件下,粉煤灰能明显改善黄原胶固土效果,联合法固化酸污染土强度甚至超过联合法固化未污染土。另外,粉煤灰可提高土壤的pH值,缓解黄原胶水解,使其发挥增黏及胶结土颗粒的作用。基于试验结果,建议采用联合法固化酸污染土(FA=9%,XG=3%),可比酸污染上海黏土强度提高310%;在未污染土中采用黄原胶即可(XG=4%),可比未污染天然上海黏土强度提高90%。研究成果有助于绿色环保型生物聚合物的推广与应用。

Abstract

Applying eco-friendly xanthan gum biopolymer (XG) in geotechnical engineering significantly enhances soil strength and boosts resistance against erosion from wind and water. The presence of pyruvate groups and glycosidic bonds in XG molecules leads to hydrolysis under acidic conditions, reducing the viscosity of XG hydrogels that bind soil particles. This study explores the effectiveness of using a combination of alkaline fly ash (FA) and XG to treat acid-contaminated soils through Atterberg limits, compaction, and unconfined compressive strength tests. The results demonstrate that FA contributes to increased plasticity limit, optimum moisture content, and maximum dry density, significantly enhancing the soil reinforcement capability of XG in acidic environments. The strength of acid-contaminated soils treated with this combined approach surpasses that of uncontaminated soils treated with the same approach. Moreover, FA mitigates the acidic soil conditions, preventing XG hydrolysis and enhancing soil treatment efficiency. Our findings recommend using a mixture of FA (9%) and XG (3%) for treating acid-contaminated soils, achieving a 310% strength increase compared to untreated soils. For uncontaminated soils, using XG alone (4%) results in a 90% strength improvement over untreated soils.

导出引用

倪静, 韩晓婷, 贺青青, 耿雪玉. 黄原胶-粉煤灰联合处理酸污染土试验研究[J]. 长江科学院院报. 2024, 41(4): 111-118 https://doi.org/10.11988/ckyyb.20221529

NI Jing, HAN Xiao-ting, HE Qing-qing, GENG Xue-yu. Experimental Study on Combined Xanthan Gum and Fly Ash Treatment on Acid-contaminated Soils[J]. Journal of Changjiang River Scientific Research Institute. 2024, 41(4): 111-118 https://doi.org/10.11988/ckyyb.20221529

中图分类号： TU411

参考文献

[1] CHANG I, LEE M, TRAN A T P, et al. Review on Biopolymer-based Soil Treatment (BPST) Technology in Geotechnical Engineering Practices[J]. Transportation Geotechnics, 2020, 24: 100385.
[2] HATAF N, GHADIR P, RANJBAR N. Investigation of Soil Stabilization Using Chitosan Biopolymer[J]. Journal of Cleaner Production, 2018, 170: 1493-1500.
[3] NI J, LI S S, MA L, et al. Performance of Soils Enhanced with Eco-friendly Biopolymers in Unconfined Compression Strength Tests and Fatigue Loading Tests[J]. Construction and Building Materials, 2020, 263: 120039.
[4] CHEN C, WU L, PERDJON M, et al. The Drying Effect on Xanthan Gum Biopolymer Treated Sandy Soil Shear Strength[J]. Construction and Building Materials, 2019, 197: 271-279.
[5] NI J, LI S S, GENG X Y. Mechanical and Biodeterioration Behaviours of a Clayey Soil Strengthened with Combined Carrageenan and Casein[J]. Acta Geotechnica, 2022, 17(12): 5411-5427.
[6] CHANG I, PRASIDHI A K, IM J, et al. Soil Treatment Using Microbial Biopolymers for Anti-desertification Purposes[J]. Geoderma, 2015, 253/254: 39-47.
[7] 吴敏, 高玉峰, 何稼, 等. 大豆脲酶诱导碳酸钙沉积与黄原胶联合防风固沙室内试验研究[J]. 岩土工程学报, 2020, 42(10): 1914-1921. (WU Min, GAO Yu-feng, HE Jia, et al. Laboratory Study on Use of Soybean Urease-induced Calcium Carbonate Precipitation with Xanthan Gum for Stabilization of Desert Sand Against Wind Erosion[J]. Chinese Journal of Geotechnical Engineering, 2020, 42(10): 1914-1921.(in Chinese))
[8] CHANG I, PRASIDHI A K, IM J, et al. Soil Strengthening Using Thermo-gelation Biopolymers[J]. Construction and Building Materials, 2015, 77: 430-438.
[9] SUTHERLAND I W. Structure-function Relationships in Microbial Exopolysaccharides[J]. Biotechnology Advances, 1994, 12(2): 393-448.
[10] 沈仁芳, 赵学强. 酸性土壤可持续利用[J]. 农学学报, 2019, 9(3): 16-20. (SHEN Ren-fang, ZHAO Xue-qiang. The Sustainable Use of Acid Soils[J]. Journal of Agriculture, 2019, 9(3): 16-20.(in Chinese))
[11] 黄世铭. 酸碱介质对粘性土工程地质性质的影响[J]. 水文地质工程地质, 1981, 8(4): 41-45. (HUANG Shi-ming. Influence of Acid-base Medium on Engineering Geological Properties of Cohesive Soil[J]. Hydrogeology and Engineering Geology, 1981, 8(4): 41-45.(in Chinese))
[12] 刘汉龙, 朱春鹏, 张晓璐. 酸碱污染土基本物理性质的室内测试研究[J]. 岩土工程学报, 2008, 30(8): 1213-1217. (LIU Han-long, ZHU Chun-peng, ZHANG Xiao-lu. Fundamental Physical Properties of Soil Polluted by Acid and Alkali in Laboratory[J]. Chinese Journal of Geotechnical Engineering, 2008, 30(8): 1213-1217.(in Chinese))
[13] 曹海荣. 酸性污染土物理力学性质的室内试验研究[J]. 湖南科技大学学报(自然科学版), 2012, 27(2): 60-65. (CAO Hai-rong. Research on Physical-mechanical Property of Soil Contaminated by Acid in Laboratory[J]. Journal of Hunan University of Science & Technology (Natural Science), 2012, 27(2): 60-65.(in Chinese))
[14] 曾斌, 韦晓青,邹胜章, 等. 西南表层岩溶带土壤中砷的迁移规律实验与模拟[J].地球科学,2018,43(11):4237-4245.(ZENG Bin,WEI Xiao-qing,ZOU Sheng-zhang,et al.Experiment and Simulation on Migration Rule of Arsenic in Soil of Surface Karst Zone in Southwest China[J]. Earth Science,2018,43(11):4237-4245.(in Chinese))
[15] HAMANAKA A, SASAOKA T, SHIMADA H, et al. Amelioration of Acidic Soil Using Fly Ash for Mine Revegetation in Post-mining Land[J]. International Journal of Coal Science & Technology, 2022, 9(1): 33.
[16] TSADILAS C, SHAHEEN S M, SAMARAS V, et al. Influence of Fly Ash Application on Copper and Zinc Sorption by Acidic Soil Amended with Sewage Sludge[J]. Communications in Soil Science and Plant Analysis, 2009, 40(1/2/3/4/5/6): 273-284.
[17] 查甫生, 王连斌, 刘晶晶, 等. 高钙粉煤灰固化重金属污染土的工程性质试验研究[J]. 岩土力学, 2016, 37(增刊1): 249-254.(CHA Fu-sheng, WANG Lian-bin, LIU Jing-jing, et al.Experimental Study on Engineering Properties of Heavy Metal Contaminated Soil Solidified by High-calcium Fly Ash[J]. Rock and Soil Mechanics, 2016, 37(Supp.1): 249-254.(in Chinese))
[18] 李侠, 裴瑶琛, 韩志平, 等. 粉煤灰与煤矸石配比对苜蓿植株生长及其修复效果的影响[J]. 河南农业科学, 2017, 46(11): 69-73. (LI Xia, PEI Yao-chen, HAN Zhi-ping, et al. Effects of Different Proportion of Coal Ash and Gangue on Plant Growth and Bioremediation Effect of Medicago Sativa[J]. Journal of Henan Agricultural Sciences, 2017, 46(11): 69-73.(in Chinese))
[19] GB/T 50145—2007, 土的工程分类标准[S]. 北京: 中国计划出版社, 2008. (GB/T 50145—2007, Standard for Engineering Classification of Soil[S]. Beijing: China Planning Press, 2008. (in Chinese))
[20] NUGENT R A, ZHANG G, GAMBRELL R P. Effect of Exopolymers on the Liquid Limit of Clays and Its Engineering Implications[J]. Transportation Research Record: Journal of the Transportation Research Board, 2009, 2101(1): 34-43.
[21] 潘海斌,魏广鸿,赵志宏,等.燃煤电厂粉煤灰综合利用途径适用性分析[J].洁净煤技术,2020,26(增刊1):262-267.(PAN Hai-bin,WEI Guang-hong,ZHAO Zhi-hong,et al.Applicability Analysis of Comprehensive Utilization of Fly Ash in Coal-fired Power Plants[J].Clean Coal Technology,2020,26(Supp.1):262-267.(in Chinese))
[22] 牛恒, 孙德安, 阮坤林. 掺粉煤灰和二灰上海软土的力学特性[J]. 防灾减灾工程学报, 2020, 40(6): 992-1000. (NIU Heng, SUN De-an, RUAN Kun-lin. Mechanical Properties of Shanghai Soft Clay Mixed with Fly-ash and Lime Fly-ash[J]. Journal of Disaster Prevention and Mitigation Engineering, 2020, 40(6): 992-1000.(in Chinese))
[23] GB/T 50146—2014, 粉煤灰混凝土应用技术规范[S]. 北京: 中国计划出版社, 2015. (GB/T 50146—2014, Technical Code for Application of Fly Ash Concrete[S]. Beijing: China Planning Press, 2015. (in Chinese))
[24] 严稳平, 刘笔艳. 换水处理: 处理硫酸污染地基的经济、环保型方法[J]. 资源环境与工程, 2008, 22(4): 461-463. (YAN Wen-ping, LIU Bi-yan. Water Treatment-economic and Environmental-friendly Method of Treatment of Foundation which is Polluted by Sulfuric Acid[J]. Resources Environment & Engineering, 2008, 22(4): 461-463.(in Chinese))
[25] GB/T 50123—2019, 土工试验方法标准[S]. 北京: 中国计划出版社, 2019. (GB/T 50123—2019, Standard for Geotechnical Testing Method[S]. Beijing: China Planning Press, 2019. (in Chinese))
[26] CHANG I, KWON Y M, IM J, et al. Soil Consistency and Interparticle Characteristics of Xanthan Gum Biopolymer-Containing Soils with Pore-fluid Variation[J]. Canadian Geotechnical Journal, 2019, 56(8): 1206-1213.
[27] 吴乐,徐同台,韩斅,等.黄原胶高温稳定性的影响因素[J].钻井液与完井液,2011,28(6):77-80,97.(WU Le, XU Tong-tai, HAN Xiao, et al. Research on High Temperature Stability Effects of Xanthan Gum[J]. Drilling Fluid & Completion Fluid, 2011, 28(6): 77-80, 97.(in Chinese))
[28] O'KELLY B C, VARDANEGA P J, HAIGH S K. Use of Fall Cones to Determine Atterberg Limits: a Review[J]. Géotechnique, 2018, 68(10): 843-856.
[29] KANG X, BATE B, CHEN R P, et al. Physicochemical and Mechanical Properties of Polymer-amended Kaolinite and Fly Ash-Kaolinite Mixtures[J]. Journal of Materials in Civil Engineering, 2019, 31(6): 1-13.
[30] 张俊然, 赵鑫鑫, 姜彤. 3种生物聚合物改良粉土的持水特性研究[J]. 岩土力学, 2022, 43(8): 2157-2164. (ZHANG Jun-ran, ZHAO Xin-xin, JIANG Tong. Water Retention Characteristics of Silt Improved by Three Types of Biopolymer[J]. Rock and Soil Mechanics, 2022, 43(8): 2157-2164.(in Chinese))
[31] 倪静,王子腾,耿雪玉.植物-生物聚合物联合法固土的试验研究[J].岩土工程学报,2020,42(11):2131-2137.(NI Jing, WANG Zi-teng, GENG Xue-yu. Experimental Study on Combined Plant-biopolymer Method for Soil Stabilization[J]. Chinese Journal of Geotechnical Engineering, 2020, 42(11): 2131-2137.(in Chinese))
[32] 李亚强, 胡凯, 赵庆良, 等. 酸浸粉煤灰制备复合混凝剂及其处理生活污水的效果研究[J]. 环境科学, 2007, 28(11): 2507-2514. (LI Ya-qiang, HU Kai, ZHAO Qing-liang, et al. Preparation of a Composite Coagulant from Fly Ash and Its Application in Domestic Wastewater Treatment[J]. Environmental Science, 2007, 28(11): 2507-2514.(in Chinese))
[33] 徐红, 罗国煜. 粉煤灰处理软土地基的试验研究[J]. 工程地质学报, 2001, 9(3): 286-290. (XU Hong, LUO Guo-yu. Test and Study on the Consolidation of Soft-soil Foundation with Powdered Fly Ash[J]. Journal of Engineering Geology, 2001, 9(3): 286-290.(in Chinese))
[34] CHANG I, CHO G C. Shear Strength Behavior and Parameters of Microbial Gellan Gum-treated Soils: From Sand to Clay[J]. Acta Geotechnica, 2019, 14(2): 361-375.
[35] MONKUL M M, OZDEN G. Compressional Behavior of Clayey Sand and Transition Fines Content[J]. Engineering Geology, 2007, 89(3/4): 195-205.