發(fā)布時(shí)間：2024-05-17 03:42

　　加納的普拉河盆地由于采礦活動(dòng),重金屬污染濃度較高,包括汞、鎘、砷、鉻、鉛、鎳和銅等。本論文研究了不同氨基酸改性蒙脫土(AA-Monts)的制備及其重金屬吸附能力,包括L-半胱氨酸蒙脫土(Cys-Mont)、甘氨酸蒙脫土(Gly-Mont)和L-賴氨酸蒙脫土(Lys-Mont),并研究了采礦廢水中不同的初始吸附劑劑量對改性蒙脫土吸附性能的影響。結(jié)果顯示吸附適用條件為:吸附劑量(25mg-400mg)、p H(6.0)、接觸時(shí)間(24h)、溫度(25^oC)、搖床速度(180rmp)、Cu²⁺濃度(10.84mg/g-108.48mg/g)、Ni²⁺(7.99mg/g–79.92mg/g)和Pb²⁺(33.538mg/g–335.38mg/g),所有氨基酸修飾蒙脫石的Cu(II),Ni(II)和Pb(II)的最大平均去除效率均達(dá)到400mg/L,順序?yàn)長ys-Mont(99.82%)>Cys-Mont(99.28%)>Gly-Mont(95.8%)。Lys-Mont的最高和最低吸附量為Cu

【文章頁數(shù)】：80 頁

【學(xué)位級(jí)別】：碩士

【文章目錄】：
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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