The physicochemical and structural characteristics of Cu2+ contaminated undisturbed loess
- Journal of Northwest University (Natural Science Edition) Vol. 54, Issue 1, Pages: 63-71(2024)
- 作者机构：
西北大学 地质学系/大陆动力学国家重点实验室，陕西 西安 710069
- 作者简介：
- 基金信息：
DOI：10.16152/j.cnki.xdxbzr.2024-01-008
CLC：
扫 描 看 全 文
ZHANG Yang, CUI Suli. The physicochemical and structural characteristics of Cu2+ contaminated undisturbed loess. [J]. Journal of Northwest University (Natural Science Edition) 54(1):63-71(2024)
ZHANG Yang, CUI Suli. The physicochemical and structural characteristics of Cu2+ contaminated undisturbed loess. [J]. Journal of Northwest University (Natural Science Edition) 54(1):63-71(2024) DOI： 10.16152/j.cnki.xdxbzr.2024-01-008.
摘要
为制定环境保护和土壤污染防治和修复策略，以及为污染场地工程建设提供理论支撑，该文研究了Cu,2+,对原状黄土物化特性及结构特性的影响。通过制备不同掺量的Cu,2+,污染黄土试样，进行了粒径分布、CaCO,3,含量和pH值的测定。利用扫描电镜和激光粒度仪获得试样的SEM图像和粉粒各粒径含量，并借助分形理论深入分析了Cu,2+,对原状黄土微观结构的影响机理。对Cu,2+,污染的原状黄土试样进行了压缩试验，并对试样的综合结构势进行了分析。结果表明，随着Cu,2+,掺量的增大，黏粒含量表现为先增后减，再增再减的趋势，粉粒含量则表现为先减后增，再减再增，砂粒含量保持不变；CaCO,3,的含量呈线性减小；pH值先迅速减小，后保持不变；污染黄土试样的综合结构势先增大后减小，之后再增大再减小。总体而言，重金属Cu,2+,的掺入，导致土壤pH值降低，主要胶结物质碳酸钙被溶解，而又因黏粒之间的静电引力和范德华力，黏粒聚集体的形态和成分发生变化，从而影响了土体的密实度和结构强度。
Abstract
The effects of Cu,2+, on the physicochemical and structural characteristics of undisturbed loess were studied in order to formulate effective strategies for environmental protection, soil pollution prevention and remediation, and to provide theoretical support for the engineering construction of contaminated sites. The particle size distribution, CaCO,3, content and pH value of Cu,2+, contaminated loess samples were determined. The SEM images and particle size contents of the samples were obtained by scanning electron microscopy and laser particle size analyzer. The influence mechanism of Cu,2+, on the microstructure of undisturbed loess was analyzed by means of fractal theory. The compression test of Cu,2+, contaminated undisturbed loess was carried out, and the comprehensive structural potential of the sample was analyzed. The results show that with the increase of Cu,2+, content, the clay content increases first and then decreases, and then increases and then decreases, while the powder content decreases first and then increases, and the sand content remains unchanged. The content of CaCO,3, decreased linearly. The pH value decreases rapidly at first, and then remains unchanged. The comprehensive structural potential of the contaminated loess samples first increased and then decreased, and then increased and then decreased. In general, the incorporation of heavy metal Cu,2+, leads to the decrease of soil pH value, the dissolution of the main cementing material calcium carbonate, and the change of the form and composition of clay aggregates due to the electrostatic attraction and van der Waals forces between clay particles, thus affecting the compactness and structural strength of soil.
关键词
Cu2+原状黄土SEM图像综合结构势粒径分布分形理论
Keywords
Cu2+undisturbed loessSEM imagescomprehensive structural potentialparticle size distributionfractal theory
references
舒心, 毛昊阳, 胡培良, 等.某搬迁铜冶炼企业原址用地土壤重金属污染空间分布特征及风险评价[J].中国环保产业, 2022(8):62-68.
SHU X, MAO H Y, HU P L, et al.Spatial distribution characteristics and risk assessment of heavy metal pollution in soil on the original site of a relocated copper smelting enterprise[J].China Environmental Protection Industry, 2022(8):62-68.
李晓臣, 周春艳.沈阳市农田土壤污染损害现状评估及原因分析[J].科学技术创新, 2020(15):2-3.
LI X C, ZHOU C Y. Assessment and cause analysis of farmland soil pollution damage in Shenyang city[J].Science and Technology Innovation, 2020(15):2-3.
高扬, 张晓昀, 王黎明, 等.黄石某钢厂重金属污染土壤修复技术示范工程实例[J].广东化工, 2021, 48(19):158-159.
GAO Y, ZHANG X Y, WANG L M, et al. Example of demonstration project of heavy metal contaminated soil remediation technology in a steel mill in Huangshi[J].Guangdong Chemical Industry, 2021, 48(19):158-159.
苗亚琼, 林清.广西土壤重金属镉污染及对人体健康的危害[J].环境与可持续发展, 2016, 41(5):171-173.
MIAO Y Q, LIN Q. Pollution of heavy metal cadmium in soil in Guangxi and its harm to human health[J].Environment and Sustainable Development, 2016, 41(5):171-173.
陈先华, 唐辉明.污染土的研究现状及展望[J].地质勘探, 2003, 39(1):77-80.
CHEN X H, TANG H M. The current situation and prospect of contaminated soil research[J].Geology and Exploration, 2003, 39(1): 77-80.
路世豹, 张建新, 雷扬, 等.某硫酸库地基污染机理的探讨[J].岩土工程界, 2003(5):37-39.
LU S B, ZHANG J X, LEI Y, et al. Discussion on the pollution mechanism of a sulfuric acid reservoir[J].Geotechnical Engineering, 2003(5):37-39.
查甫生, 刘晶晶, 夏磊, 等. 重金属污染土的工程性质试验研究[C]//第四届全国环境岩土工程与土工合成材料学术研讨会论文集.重庆, 2014:496-499.
储诚富, 查甫生, 夏磊, 等.锌污染黏土工程性质的试验研究[J].工业建筑, 2015, 45(1):118-121.
CHU C F, ZHA F S, XIA L, et al. Experimental study on engineering properties of zinc-contaminated clay[J].Industrial Construction, 2015, 45(1):118-121.
RESMI G, THAMPI S G, CHANDRAKARAN S. Impact of lead contamination on the engineering properties of clayey soil[J].Journal of the Geological Society of India, 2011, 77(1):42-46.
刘志彬, 方伟, 陈志龙, 等.锌离子污染对膨润土一维压缩特性影响试验研究[J].岩土力学, 2013, 34(8):2211-2217.
LIU Z B, FANG W, CHEN Z L, et al. Experimental study on the effect of zinc ion pollution on one-dimensional compression characteristics of bentonite[J].Rock and Soil Mechanics, 2013, 34(8):2211-2217.
王睿.膨胀土在重金属污染条件下工程性质变化规律以及机理研究[D].合肥: 合肥工业大学, 2021.
FAN R D, LIU S Y, DU Y J, et al.Impacts of presence of lead contamination on settling behavior and microstructure of clayey soil-calcium bentonite blends[J].Applied Clay Science, 2017, 142:109-119.
刘刚.Cr3+污染黄土压缩变形特性试验研究[J].西北农林科技大学学报(自然科学版), 2017, 45(3):227-234.
LIU G. Experimental study on compression deformation characteristics of Cr3+ contaminated loess[J].Journal of Northwest A & F University(Natural Science Edition), 2017, 45(3):227-234.
张淼.重金属对黄土pH值的影响[J].山西水利科技, 2004(4):14-15.
ZHANG M. Effect of heavy metals on pH value of loess[J].Shanxi Water Conservancy Science and Technology, 2004(4):14-15.
杨波, 李熠, 董晓强.Cr6+对重塑黄土抗剪强度和电阻率的影响[J].人民黄河, 2017, 39(1):130-132.
YANG B, LI Y, DONG X Q. Effect of Cr6+ on shear strength and resistivity of reshaped loess[J].Renmin Huanghe, 2017, 39(1):130-132.
苌宽.重金属污染土物化特性和固化机理试验研究[D].郑州: 中原工学院, 2023.
严华山. 稀土水合离子在高岭石表面吸附行为的第一性原理研究[D].赣州: 江西理工大学, 2019.
谢定义, 齐吉琳, 朱元林.土的结构性参数及其与变形-强度的关系[J].水利学报, 1999, 30(10):1-6.
XIE D Y, QI J L, ZHU Y L.Soil structure parameter and its relations to deformation and strengh[J].Journal of Hydraulic Engineering, 1999, 30(10):1-6.
雷祥义.西安黄土显微结构类型[J].西北大学学报(自然科学版), 1983, 13(4):56-65.
LEI X Y. Type of the loess microtextures sin Xian distrct[J].Journal of Northwest University(Natural Science Edition), 1983, 13(4): 56-65.
张宗祜.我国黄土类土显微结构的研究[J].地质学报, 1964(3):357-369.
ZHANG Z H. Study on the microstructure of loess soil in China[J].Acta Geological Sinica, 1964(3):357-369.
雷昊楠. 黄土剪切面特征及抗剪强度影响因素试验研究[D].西安: 长安大学, 2021.
马闫. 黄土结构性多尺度研究[D].西安: 西北大学, 2017.
张黎明. 用分形理论研究黏土的粒度分布特征[J].油田化学, 1996, 13(4): 289-293.
ZHANG L M. An investigation on characteristics for particle size distribution of clays in drilling muds by the way of fractal geometry[J].Oilfield Chemistry, 1996, 13(4): 289-293.
许勇, 张季超, 李伍平.饱和软土微结构分形特征的试验研究[J].岩土力学, 2007, 28(S1):49-52.
XU Y, ZHANG J C, LI W P. Experimental study on fractal characteristics of saturated soft soil microstructure[J].Rock and Soil Mechanics, 2007, 28(S1):49-52.
秦雯, 沙爱民. 粉土粒度分布的分形特征[J].长安大学学报(自然科学版), 2009, 29(6): 10-14.
QIN W, SHA A M, Fractal features of silt particle size distribution[J].Journal of Chang’an University(Natural Science Edition), 2009, 29(6): 10-14.
谷天峰, 王家鼎, 郭乐, 等.基于图像处理的Q3黄土的微观结构变化研究[J].岩石力学与工程学报, 2011, 30(S1):3185-3192.
GU T F, WANG J D, GUO L, et al. Study on microstructure change of Q3 loess based on image processing[J].Chinese Journal of Rock Mechanics and Engineering, 2011, 30(S1):3185-3192.
徐世民, 吴志坚, 赵文琛, 等.基于Matlab和IPP的黄土孔隙微观结构研究[J].地震工程学报, 2017, 39(1):80-87.
XU S M, WU Z J, ZHAO W C, et al. Study on pore microstructure of loess based on Matlab and IPP[J].Journal of Earthquake Engineering, 2017, 39(1):80-87.
刘春, 许强, 施斌, 等.岩石颗粒与孔隙系统数字图像识别方法及应用[J].岩土工程学报, 2018, 40(5):925-931.
LIU C, XU Q, SHI B, et al. Digital image recognition method and application of rock particle and pore system[J].Chinese Journal of Geotechnical Engineering, 2018, 40(5):925-931.
汤强, 刘春, 顾颖凡, 等.土体SEM图像微观结构的识别和统计方法[J].桂林理工大学学报, 2017, 37(3):547-552.
TANG Q, LIU C, GU Y F, et al.Identification and statistical method of soil SEM image microstructure[J].Journal of Guilin University of Technology, 2017, 37(3):547-552.
陈昊.酸性环境下黄土的微观结构及物理特性研究[D].西安: 西安理工大学, 2018.
0
Views
0
下载量
0
CSCD
- L-PDFDownload
- Meta-XMLDownload
- BibTeXDownload
- EndnoteDownload
- RefMan Download
- NoteExpressDownload
- NoteFirstDownload
Publicity Resources
Related Articles
Related Author
Related Institution
- Tel：029-88302822 Email：xdxbzr@nwu.edu.cn
- Technical support is provided by Beijing Founder electronics co., LTD 陕ICP备05010980号-4
京公网安备11010802024621 - It is recommended to read the content of this site in Chrome&IE9+. Please switch to extreme mode in browser 360.
- Cookies We use cookies to help provide and enhance our service and tailor content. By continuing, you agree to the use of cookies.