Adsorption of Heavy Metals from Mining Wastewater Using Amin

发布时间：2024-05-17 03:42

　　加纳的普拉河盆地由于采矿活动,重金属污染浓度较高,包括汞、镉、砷、铬、铅、镍和铜等。本论文研究了不同氨基酸改性蒙脱土(AA-Monts)的制备及其重金属吸附能力,包括L-半胱氨酸蒙脱土(Cys-Mont)、甘氨酸蒙脱土(Gly-Mont)和L-赖氨酸蒙脱土(Lys-Mont),并研究了采矿废水中不同的初始吸附剂剂量对改性蒙脱土吸附性能的影响。结果显示吸附适用条件为:吸附剂量(25mg-400mg)、p H(6.0)、接触时间(24h)、温度(25^oC)、摇床速度(180rmp)、Cu²⁺浓度(10.84mg/g-108.48mg/g)、Ni²⁺(7.99mg/g–79.92mg/g)和Pb²⁺(33.538mg/g–335.38mg/g),所有氨基酸修饰蒙脱石的Cu(II),Ni(II)和Pb(II)的最大平均去除效率均达到400mg/L,顺序为Lys-Mont(99.82%)>Cys-Mont(99.28%)>Gly-Mont(95.8%)。Lys-Mont的最高和最低吸附量为Cu

【文章页数】：80 页

【学位级别】：硕士

【文章目录】：
ABSTRACT
摘要
LIST OF ABBREVIATION
Chapter1 :INTRODUCTION
    1.1 Background
    1.2 Motivation
    1.3 Research Objectives
    1.4 Significance of the Study
Chapter2 :LITERATURE REVIEW
    2.1 Industrial Wastewater Treatment Processes
    2.2 Adsorption and Effective Factors
    2.3 Low-Cost Adsorbents
    2.4 Clay Minerals
        2.4.1 Structure and Chemical Nature of Clay Minerals
        2.4.2 Classification of Clay Minerals
        2.4.3 Properties of Clays Minerals
        2.4.4 Chemical Composition of Clay Minerals
    2.5 Amino-Acid Modified Montmorillonites
        2.5.1 Amino Acid Intercalation Process
        2.5.2 Heavy Metal Adsorption using Na Montmorillonite and AA-Monts
Chapter3 :EXPERIMENTAL METHOD
    3.1 Materials and Chemicals:
    3.2 Characterization Methods
        3.2.1 Mineralogical Composition:
        3.2.2 Chemical Composition
    3.3 Experimental Method
        3.3.1 Montmorillonite Purification and Sodium Activation
        3.3.2 Selection Criteria for the Amino Acids
        3.3.3 Amino Acid intercalation into Montmorillonite Clay(AA-Mont)
        3.3.4 Synthesizing Aqueous Complex Heavy Metal Solution
        3.3.5 Adsorption Experiments
Chapter4 :RESULTS AND DISCUSSION
    4.1 Characterization Results:
    4.2 Removal Efficiency and Effect of Adsorbent Dosage
    4.3 Effect of Initial Heavy Metal Cation Concentration
    4.4 Selectivity
CONCLUSION
REFERENCES
ACKNOWLEDGEMENT
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