非均质性对保守溶质及蒙脱石胶体在饱和多孔介质中运移的影响

赵康; 郑晓丽; 陈冲; 商建英

doi:10.13870/j.cnki.stbcxb.2018.03.022

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非均质性对保守溶质及蒙脱石胶体在饱和多孔介质中运移的影响

更新时间：2025-03-12

- 非均质性对保守溶质及蒙脱石胶体在饱和多孔介质中运移的影响
- Effects of Heterogeneity on Migration of Tracer and Montmorillonite Colloid in Saturated Porous Medium
- 水土保持学报 2018年32卷第3期页码：140-145
- 作者机构：
  
  1. 中国农业大学资源与环境科学学院,北京,100193
  2. 教育部植物-土壤相互作用重点实验室,北京,100193
  3. 农业部华北耕地保育重点实验室,北京,100193
- 作者简介：
  
  [ "赵康(1995-),男,山西省忻州人,硕士研究生,主要从事胶体及其协同污染物迁移研究。E-mail:coolkang@126.com" ]
- 基金信息：
  
  国家自然科学基金项目（41501232）
- DOI：10.13870/j.cnki.stbcxb.2018.03.022
  中图分类号：
- 纸质出版：2018
- 稿件说明：
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赵康, 郑晓丽, 陈冲, 等. 非均质性对保守溶质及蒙脱石胶体在饱和多孔介质中运移的影响[J]. 水土保持学报, 2018,32(3):140-145.

ZHAO Kang, ZHENG Xiaoli, CHEN Chong, et al. Effects of Heterogeneity on Migration of Tracer and Montmorillonite Colloid in Saturated Porous Medium[J]. 2018, 32(3): 140-145.
赵康, 郑晓丽, 陈冲, 等. 非均质性对保守溶质及蒙脱石胶体在饱和多孔介质中运移的影响[J]. 水土保持学报, 2018,32(3):140-145. DOI： 10.13870/j.cnki.stbcxb.2018.03.022.

ZHAO Kang, ZHENG Xiaoli, CHEN Chong, et al. Effects of Heterogeneity on Migration of Tracer and Montmorillonite Colloid in Saturated Porous Medium[J]. 2018, 32(3): 140-145. DOI： 10.13870/j.cnki.stbcxb.2018.03.022.

摘要

选取2种粒径玻璃珠构建6种不同构型的柱子（2个均质和4个非均质），研究了饱和条件下多孔介质构型对保守溶质和蒙脱石胶体运移的影响。结果表明：在2种均质介质中，保守溶质的穿透曲线相似且对称，蒙脱石胶体在大粒径玻璃珠中的移动性更强。当介质中存在大孔隙通道时，优先流现象的出现会加速保守溶质和蒙脱石胶体的迁移，大孔隙通道与周围介质交界面越大保守溶质和蒙脱石胶体的拖尾现象越明显且穿透峰较低。在大、小粒径玻璃珠均匀混合填装的柱子中，保守溶质穿透曲线形状与均质柱子相似，蒙脱石胶体的移动性介于大、小粒径玻璃珠均匀填装的柱子之间。蒙脱石胶体在玻璃珠分层填装的柱子中，大粒径与小粒径交界面区域会有更多的蒙脱石胶体滞留。研究表明非均质性对保守溶质和蒙脱石胶体在土壤和地下环境中的运移过程有重要的影响。

Abstract

In six structurally packed columns (two homogeneous and four heterogeneous) constructed with two kinds of glass beads

we studied the effect of media heterogeneous on the transport behaviors of tracer and montmorillonite colloids in saturated condition. The results showed that the breakthrough curves of tracer were similar in two homogeneous columns

and the mobility of montmorillonite colloids in coarse media was stronger than that in fine media. For the column containing macroporous channel

the presence of preferential flow path resulted in an earlier breakthrough of tracer and montmorillonite colloids

and larger contact area between macroporous channel and fine grains caused a lower breakthrough peak and a stronger tailing. In column packed with homogeneous mixture of coarse and fine grains

the shape of tracer breakthrough curves were similar to that in homogeneous columns

and the mobility of montmorillonite colloid was between that in the homogeneous columns (coarse and fine grain). More montmorillonite colloids were retained at coarse-fine grain interface in the layered column. The results have shown that heterogeneity has an important effect on the transport of the tracer and montmorillonite colloid in soil and underground environment.

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references

Jonge L W D, Kjaergaard C, Moldrup P. Colloids and colloid-facilitated transport of contaminants in soils[J]. Vadose Zone Journal, 2004, 3(2):321-325.

Bekhit H M, Hassan A E. Two-dimensional modeling of contaminant transport in porous media in the presence of colloids[J]. Advances in Water Resources, 2005, 28(12):1320-1335.

Mcgechan M B, Lewis D R. SW-soil and water:Transport of particulate and colloid-sorbed contaminants through soil, Part 1:General principles[J]. Biosystems Engineering, 2002, 83(3):255-273.

刘庆玲,徐绍辉.地下环境中胶体促使下的污染物运移研究进展[J].土壤,2005,37(2):129-135.

Shang J, Flury M, Harsh J B, et al. Comparison of different methods to measure contact angles of soil colloids[J]. Journal of Colloid and Interface Science, 2008, 328(2):299-307.

Shang J, Liu C, Wang Z. Transport and retention of engineered nanoporous particles in porous media:Effects of concentration and flow dynamics[J]. Colloids & Surfaces A Physicochemical & Engineering Aspects, 2013, 417(3):89-98.

Bradford S A, Simunek J, Bettahar M, et al. Modeling colloid attachment, straining, and exclusion in saturated porous media[J]. Environmental Science & Technology, 2003, 37(10):2242-2250.

Cai L, Tong M, Ma H, et al. Cotransport of titanium dioxide and fullerene nanoparticles in saturated porous media[J]. Environmental Science & Technology, 2013, 47(11):5703-5710.

Cai L, Tong M, Wang X, et al. Influence of clay particles on the transport and retention of titanium dioxide nanoparticles in quartz sand[J]. Environmental Science & Technology, 2014, 48(13):7323-7332.

Yang H, Tong M, Kim H, et al. Influence of bentonite particles on representative gram negative and gram positive bacterial deposition in porous media[J]. Environmental Science & Technology, 2012, 46(21):11627-11634.

Yang H, Tong M, Kim H, et al. Effect of carbon nanotubes on the transport and retention of bacteria in saturated porous media[J]. Environmental Science & Technology, 2013, 47(20):11537-11544.

Zhuang J, Jin Y, Flury M, et al. Comparison of hanford colloids and kaolinite transport in porous media[J]. Vadose Zone Journal, 2004, 3(2):395-402.

Vasiliadou I A, Chrysikopoulos C V. Cotransport of pseudomonas putida and kaolinite particles through water-saturated columns packed with glass beads[J]. Water Resources Research, 2011, 47(2):2144-2150.

Zhu Y, Ma L Q, Gao B, et al. Transport and interactions of kaolinite and mercury in saturated sand media[J]. Journal of Hazardous Materials, 2012, S213/214(7):93-99.

Bianchi M, Zheng C, Wilson C, et al. Spatial connectivity in a highly heterogeneous aquifer:From cores to preferential flow paths[J]. Water Resources Research, 2011, 47(5):415-421.

Liu C, Shang J, Shan H, et al. Effect of subgrid heterogeneity on scaling geochemical and biogeochemical reactions:A case of U(VI) desorption[J]. Environmental Science & Technology, 2014, 48(3):1745-1752.

Zhang C, Liu C, Shi Z. Micromodel investigation of transport effect on the kinetics of reductive dissolution of hematite[J]. Environmental Science & Technology, 2013, 47(9):4131-4139.

Porubcan A A, Xu S. Colloid straining within saturated heterogeneous porous media[J]. Water Research, 2011, 45(4):1796-1806.

杨雯,郝丹丹,徐东昊,等.生物炭颗粒在饱和多孔介质中的迁移与滞留[J].土壤通报,2017,48(2):304-312.

冯桐桐,杨雯,刘克思,等.离子强度和腐植酸对高岭土协同磺胺二甲基嘧啶迁移的影响[J].农业环境科学学报,2017,36(9):1804-1810.

Van Genuchten M T, Simunek J, Leij F J, et al. STANMOD:Model use, calibration, and validation[J]. Transactions of the ASABE, 2012, 55(4):1355-1366.

方婧,汪敏浩,沈冰,等.大孔隙对纳米CeO

在多孔介质中迁移行为的影响[J].环境科学学报,2016,36(8):2924-2931.

Bradford S A, Torkzaban S, Walker S L, et al. Coupling of physical and chemical mechanisms of colloid straining in saturated porous media[J]. Water Research, 2007, 41(13):3012-3024.

Dong S, Shi X, Gao B, et al. Retention and release of graphene oxide in structured heterogeneous porous media under saturated and unsaturated conditions[J]. Environmental Science & Technology, 2016, 50(19):10397-10405.

Wu L, Gao B, Tian Y, et al. Analytical and experimental analysis of solute transport in heterogeneous porous media[J]. Journal of Environmental Science and Health Part A-toxic/hazardous Substances & Environmental Engineering, 2014, 49(3):338-343.

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