染料工業(yè)發(fā)展迅速,已廣泛應用于食品、醫(yī)藥、印染及化妝品中。隨著染料的大規(guī)模應用,越來越多含有染料的廢水在生產(chǎn)和使用中釋放到環(huán)境中,帶來的環(huán)境污染日趨嚴重。當染料廢水排入水體時造成受污染水域色度增加,影響入射光線量,進而對水質(zhì)、水體生物、人體健康和生態(tài)造成嚴重的危害。三苯甲烷類染料是合成染料中應用最廣的染料類型之一,孔雀石綠和結(jié)晶紫作為此類染料的典型代表,已有研究表明該類染料對人體具有致癌、致畸和致突變的作用,對人類健康具有潛在危害。因此處理此類染料廢水已成為亟待解決的重大問題。本文利用X射線衍射儀與X射線光電子能譜儀對零價納米鋅(購買)進行了表征,并研究了其對孔雀石綠水溶液的吸附。采用響應面實驗設計方法,研究了pH、溫度、反應時間及初始濃度對染料的吸附影響。并在響應面的基礎上,采用神經(jīng)網(wǎng)絡結(jié)合粒子群和神經(jīng)網(wǎng)絡結(jié)合遺傳算法模型預測其最優(yōu)反應條件,獲得最大去除率。結(jié)果表明,神經(jīng)網(wǎng)絡結(jié)合遺傳算法預測的最佳吸附條件為:pH為5.70,溫度為27.19℃,反應時間為110.62 min和初始濃度為607.03 mg/L。在上述條件下預測的去除率為94.12%,與之對應的實驗結(jié)果為90.72%,兩...

【文章頁數(shù)】：97 頁

【學位級別】：碩士

【文章目錄】：
ABBREVIATION
中文摘要
Abstract
1. Introduction
    1.1. Hazardous dye of Malachite green and Crystal violet
    1.2. Classification of dyes
        1.2.1. Azo dyes
        1.2.2. Anthraquinone dyes
        1.2.3. Triarylmethane dyes
    1.3. Dye removal techniques
        1.3.1. Biological methods
        1.3.2. Chemical methods
        1.3.3. Physical methods
    1.4. Adsorption of dyes by nanoparticles
        1.4.1. Nano zerovalent iron
        1.4.2. Nanomaterials with magnetic properties
        1.4.3. Nano magnesium oxide
        1.4.4. Graphene oxide and reduced graphene oxide based nanomaterials
    1.5 Modelling and optimization techniques
    1.6. Main objectives of the present work
2. Preparation of reduced graphene oxide-supported bimetallic Fe/Ni composites (rGO/Fe/Ni)
    2.1. Experimental section
        2.1.1. Materials
        2.1.2. Experimental instruments
    2.2. Preparation of the nanomaterials
        2.2.1. Synthesis of graphene oxide (GO)
        2.2.2. Synthesis of Fe/Ni particles and rGO/Fe/Ni composites
    2.3. Characterization of the Commercially Available nZVZ and rGO/Fe/Ni
    2.4. Batch adsorption experiments
    2.5. Determine the zero point of charge of rGO/Fe/Ni composites
    2.6. Results and discussion
        2.6.1. Characterization of the commercially available nZVZ
        2.6.2. Characterization of rGO/Fe/Ni
        2.6.3 The zero point of charge for rGO/Fe/Ni composites
    2.7. Summary
3. Modeling and optimization
    3.1. Modeling and Optimization by RSM
        3.1.1. Modeling and Optimization for MG removal onto nZVZ by RSM
        3.1.2. Modeling and Optimization for CV removal onto rGO/Fe/Ni composites by RSM
    3.2. Prediction by BP-ANN
        3.2.1 Prediction for the adsorption of MG onto the commercially available nZVZ byBP-ANN
        3.2.2. Prediction for the adsorption of CV onto rGO/Fe/Ni composites by BP-ANN
    3.3. Modelling and optimization by ANN-PSO and ANN-GA
        3.3.1. Modelling and optimization for the adsorption of MG onto the commerciallyavailable nZVZ by ANN-PSO and ANN-GA
        3.3.2. Modeling and optimization for the removal of CV by rGO/Fe/Ni composites usingANN-PSO and ANN-GA
    3.4. Comparison with RSM, ANN-PSO and ANN-GA
        3.4.1 The adsorption of MG onto the commercially available nZVZ
        3.4.2. The adsorption of CV onto rGO/Fe/Ni composites
    3.5. Summary
4. Equilibrium isotherms, adsorption kinetic and adsorption thermodynamic
    4.1. Equilibrium Isotherms
        4.1.1. Equilibrium Isotherms for the adsorption of MG by the commercially availablenZVZ
        4.1.2. Equilibrium Isotherms for the adsorption of CV by rGO/Fe/Ni composites
    4.2. Adsorption kinetic
        4.2.1. Kinetic study for the adsorption of MG by the commercially available nZVZ
        4.2.2. Kinetic study for the adsorption of CV by rGO/Fe/Ni composites
    4.3. Thermodynamics study
        4.3.1. Thermodynamics study for the adsorption of MG onto the commercially availablenZVZ
        4.3.2. Thermodynamics study for the adsorption of CV by rGO/Fe/Ni composites
    4.4. Summary
5. Conclusion
6. Prospects
References
附錄
致謝



本文編號：3843379