發(fā)布時間：2021-08-15 16:01

　　本研究以南中國海東北部為研究領(lǐng)域,分析該海域沉積柱中金屬（如V,Cr,Mn,Fe,Co,Ni,Zn,Cu,Ba和U）和總有機(jī)碳（TOC）的濃度最后本文根據(jù)生態(tài)風(fēng)險評估（如污染因子（Cf）和污染負(fù)載指標(biāo)（PLI））,評價該海域分析各種金屬的影響程度,并綜合評估總體污染狀況。具體研究結(jié)果如下:（1）南海沉積物的重金屬污染并非主要問題,金屬Cr,Pb,Cd的濃度均低于標(biāo)準(zhǔn)參考值。南海沉積柱中金屬的濃度范圍為Mn為0.291±0.69-10.80±1.26ppm（平均值為2.81 ppm）,V 為 50.53±1.84-120.1±0.67 ppb（平均值為 93.00 ppb）,Cr 為60.65±3.29-26.65±3.89 ppb（平均值 49.78 ppb）,Fe 63.77±0.17-22.60±1.35 ppm（平均值為44.69 ppm）,Ni為25.41±1.65-90.11±1.64 ppb（平均值為63.81 ppb）,Cu為16.93±3.44-56.59±1.44 ppb（平均值為41.06 ppb）,Zn為140.2±2.44-396.9±1.14ppb（平均值為 ... 

【文章來源】：廈門大學(xué)福建省 211工程院校 985工程院校 教育部直屬院校

【文章頁數(shù)】：78 頁

【學(xué)位級別】：碩士

【文章目錄】：
摘要
Abstract
Chapter 1 Introduction
    1.1 General introduction
    1.2 Characteristics and effects of Heavy metals
        1.2.1 Physical characteristics
        1.2.2 Chemical characteristics
        1.2.3 Effects of heavy metals
    1.3 Environmental Behavior of heavy metals
    1.4 Heavy metals in marine sediments
    1.5 Importance of South China Sea as a marginal sea
    1.6 Objectives of the present study
Chapter 2 Literature Review
    2.1 Research Progress of heavy metals in sediments from marine areas
    2.2 Research Progress of Heavy Metals in SCS sediments
    2.3 Research significance and research content
Chapter 3 Materials and Methods
    3.1 Sampling site
    3.2 Sample collection
    3.3 Sample treatment and analysis
        3.3.1 Materials and reagents
        3.3.2 Pre treatment
        3.3.3 Sample analysis
        3.3.4 Quality Assurance and Quality Control
    3.4 Total organic carbon
    3.5 Assessments of pollution status indicator for metals
        3.5.1 Geo-accumulation index (Igeo):
        3.5.2 Ecological risk assessment
        3.5.3 Contamination factor (Cf) and Pollution load index (PLI):
Chapter 4 Results and Discussions
    4.1 Basic Parameter
    4.2 Metals concentration in sediment core
    4.3 Distribution and comparison pattern
        4.3.1 Metals distribution
        4.3.2 Pb Isotope (~(208/206)Pb and ~(207/206) Pb) distribution
        4.3.3 Results Discussion for Metals Distribution
    4.4 Results for Pollution Status Indicator
        4.4.1 Geo Accumulation Index (I_(geo))
        4.4.2 Contamination factor (C_f), Degree of contamination (C_d) and Pollution LoadIndex (PLI)
        4.4.3 Potential ecological risk (E_r~i) Ecological Risk Assessment (RI)
        4.4.4 Results discussion for pollution index
Chapter 5 Conclusion
Chapter 6 References
Appendix
Acknowledgements



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