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  本文關(guān)鍵詞：重金屬污染土物化特性和固化機理試驗研究　出處：《中原工學院》2017年碩士論文　論文類型：學位論文

  更多相關(guān)文章： 重金屬污染土 固化 微觀結(jié)構(gòu) 機理

【摘要】：針對重金屬污染土孔隙比高、壓縮性大,抗剪強度低、承載力差等原因?qū)е碌牡鼗鶑姸鹊�、變形大和不均勻沉降等問題,本文選取重金屬(Pb~(2+)、Zn~(2+)、Cu~(2+))污染土為研究對象,首先對現(xiàn)場未污染土的化學成分和微觀結(jié)構(gòu)進行分析;然后運用室內(nèi)試驗、各種測試技術(shù)和相關(guān)數(shù)學方法,深入研究重金屬污染土的固化機理,全面分析重金屬污染土的各種物化特性、礦物成分、微觀結(jié)構(gòu)、重金屬離子濃度、固化劑及其摻量和齡期等因素對重金屬污染土固化效果的影響和相關(guān)性;進而研究“土-固化劑-重金屬離子”相互作用的重金屬污染土的固化機理,給出固化劑及其摻量(配比)、重金屬離子(濃度和組成成分)、土體強度、淋濾性和滲透性等因素對固化過程的影響規(guī)律及其關(guān)系式,為重金屬污染土壤的工程開發(fā)建設(shè)提供了一定的理論和技術(shù)支持。主要研究內(nèi)容如下:(1)重金屬(Pb~(2+)、Zn~(2+)、Cu~(2+))污染土的物化特性研究首先以現(xiàn)場取樣土體為研究對象,研究重金屬污染土污染前后的物化特性、重金屬離子的作用影響及其各影響因素的相關(guān)性。然后以試驗室制樣為研究對象,研究重金屬污染土和未污染土的物化特性、重金屬離子的作用影響及其各影響因素的相關(guān)性。最后將現(xiàn)場取樣和試驗室制樣兩種情況下的研究成果進行比較研究,探討室內(nèi)試驗的合理性,分析二者研究成果的相關(guān)性。(2)重金屬(Pb~(2+)、Zn~(2+)、Cu~(2+))污染土固化機理研究以試驗室制樣為研究對象,考慮“土-固化劑-重金屬離子”相互作用的影響,通過研究固化過程中重金屬污染土的微觀結(jié)構(gòu)變化規(guī)律。探討重金屬污染土的固化機理。(3)重金屬(Pb~(2+)、Zn~(2+)、Cu~(2+))污染土固化技術(shù)研究采用室內(nèi)試驗,研究合理的重金屬(Pb~(2+)、Zn~(2+)、Cu~(2+))污染土固化處理新方法,探討處理不同污染程度的重金屬污染土時固化劑與添加劑及其摻量(配合比)的選用方案和適用條件。
[Abstract]:Heavy metal pollution in soil pore ratio, high compressibility, low shear strength, the strength of the foundation bearing capacity and other reasons lead to poor low, large and uneven settlement of problems such as deformation, this paper selected heavy metals (Pb~ (2+), Zn~ (2+), Cu~ (2+)) contaminated soil as the research object, the first analysis the first chemical composition on site uncontaminated soil and micro structure; and then use the indoor test, various testing techniques and related mathematical methods, in-depth study of curing mechanism of heavy metal pollution in soil, a comprehensive analysis of various physical and chemical properties, heavy metal pollution of soil mineral composition, microstructure, concentration of heavy metal ions, factors of curing agent and its dosage and age the influence of heavy metal pollution in soil during the curing effect and correlation; curing mechanism of soil curing agent of heavy metal ions "soil heavy metal pollution interaction, curing agent and its dosage given (ratio), the concentration of heavy metal ions ( And composition), the strength of soil, leaching and permeability and other factors influence on the curing process and its relation, provides a theoretical and technical support for the development and construction of heavy metal pollution in soil engineering. The main contents are as follows: (1) heavy metal (Pb~ (2+), Zn~ (2+), Cu~ (2+)) study on physicochemical characteristics of contaminated soil at first sampling soil as the research object, the physicochemical characteristics before and after the study of heavy metal pollution in soil pollution, and the correlation of each influencing factor of heavy metal ions. Then by test sample preparation as the research object, the study of heavy metal pollution in soil and uncontaminated soil physicochemical properties, and the correlation of each influencing factor of heavy metal ions. Finally compare research results of field sampling and laboratory sample preparation under two kinds of situations, reasonable of indoor test, the analysis results of the two The correlation of heavy metals. (2) (Pb~ (2+), Zn~ (2+), Cu~ (2+)) on the mechanism of soil pollution curing by test sample preparation as the research object, considering the influence of the soil curing agent of heavy metal ion interaction, through the micro structure changes of soil heavy metal pollution in the curing process to investigate the curing mechanism of heavy metal pollution. Soil heavy metals. (3) (Pb~ (2+), Zn~ (2+), Cu~ (2+)) on the curing technology of contaminated soil by laboratory experiments to study the reasonable heavy metal (Pb~ (2+), Zn~ (2+), Cu~ (2+)) contaminated soil curing processing new methods of treatment of soil heavy metal pollution in different degree of pollution when curing agent and additive and admixture (mix) selection scheme and application conditions.

【學位授予單位】：中原工學院
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：X53

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