全文总字数：2888字
1. 毕业设计（论文）的内容和要求
重金属在土壤孔隙的运移收到很多因素的影响，如土壤孔隙水的运动、土壤孔隙水的化学特征（pH、离子强度等）。
此外，土壤胶体的释放也会影响重金属的运移。
土壤无机胶体主要包括土壤黏土矿物等；土壤腐殖质分子质量大，结构复杂，性质稳定，具有明显的胶体性质。
2. 实验内容和要求
1、土壤样品收集与预处理2、胶体分离3、运移实验要求：通过实验掌握土壤样品预处理方法，土壤胶体分离方法以及运移实验方法，同时要求熟悉和掌握相应仪器设备的使用法。
3. 参考文献
1.Xu H, Xia B, He E, Qiu R, Peijnenburg WJGM, Qiu H, Zhao L, Xu X, Cao X, Dynamic release and transformation of metallic copper colloids in flooded paddy soil: Role of soil reducible sulfate and temperature. Journal of Hazardous Materials, 2021, 402: 1234622.Bland GD, Rao B, Reible D, Evaluating the transport of Hg(II) in the presence of natural organic matter through a diffusive gradient in a thin-film passive sampler. Science of The Total Environment, 2020, 749: 1412173.Meng Q, Jin L, Cheng L, Fang J, Lin D, Release and sedimentation behaviors of biochar colloids in soil solutions. Journal of Environmental Sciences, 2021, 100: 269-2784.Liu X, Feng B, Tian R, Li R, Tang Y, Wu L, Ding W, Li H. Electrical double layer interactions between soil colloidal particles: Polarization of water molecule and counterion. Geoderma, 2020, 380: 1146935.Tang X, Katou H, Suzuki K, Liming effects on dissolved and colloid-associated transport of cadmium in soil under intermittent simulated rainfall. Journal of Hazardous Materials, 2020, 400: 123244. 6.Zhang Y, Tian R, Tang J, Li H, Specific ion effect of H on variably charged soil colloid aggregation. Pedosphere, 2020, 30: 844-852.7.Cheng H, Yang T, Ma J, Jiang J, Wang P, The aggregation kinetics of manganese oxides nanoparticles in Al(III) electrolyte solutions: Roles of distinct Al(III) species and natural organic matters. Science of The Total Environment, 2020, 744: 140814.DOI: 10.1016/j.scitotenv.2020.1408148.Uchimiya M, Bannon D, Nakanishi H, McBride M, Williams MA, Yoshihara T, Chemical Speciation, Plant Uptake, and Toxicity of Heavy Metals in Agricultural Soils. Journal of agricultural and food chemistry. 2020, 68(46): 12856-128699.Lindfors S, Osterlund H, Lundy L, Viklander M, Metal size distribution in rainfall and snowmelt-induced runoff from three urban catchments, Science of The Total Environment, 2020, 743:140813, DOI: 10.1016/j.scitotenv.2020.14081310.王展，邹洪涛，范庆锋，岑佳蓉，张玉龙. 冻融作用对土壤胶体及胶体结合态铅迁移的影响. 农业环境科学学报, 2019, 38（2）：342-347.
4. 毕业设计（论文）计划
2019.12.27-2020.2.20 布置课题，根据课题要求开始查阅文献，撰写并提交开题报告，完成文献翻译。
2020.2.21-2020.3.13 整理实验室，熟悉实验室各项操作及规定2020.3.14-2020.3.31 材料的收集与预处理，试剂等的准备2020.4.1-2020.4.25 单独运移实验；土壤胶体的分离2020.4.25-2020.5.25 共运移实验等2020.5.26-2020.6.3 整理数据, 补充实验，撰写论文2015.6.3- 完成并修改论文准备答辩
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