多环芳烃（PAHs）是污染土壤中常见重要污染物，2014年《全国土壤污染状况调查公报》中指出，”我国土壤中PAHs点位超标率达1.4%”；污染区土壤中苯并[a]芘（BaP）含量高达82mg/kg。土壤PAHs污染的危害很大，不仅直接导致粮食减产、加剧我国人多地少的矛盾，而且PAHs可在土壤-植物系统中迁移，危及农产品安全和人群健康。搞清PAHs在土壤-植物系统中迁移转化过程及归趋，这对于减低作物污染风险、保障农产品安全、指导污染区农业安全生产、合理利用土壤资源等意义重大。本书在长期研究工作积累的基础上，整理了多个国家级科研项目的研究成果，集中阐述土壤中PAHs的形态、分布、有效性、界面行为等关键迁移转化过程，系统地介绍了PAHs的植物吸收途径、积累、代谢、亚细胞分配行为，阐释了化学与生物技术调控植物吸收PAHs的基本过程及原理，评价了吸收模型对于预测植物积累PAHs的有效性。该书是目前国内外少有的一部系统性介绍土壤-植物系统中PAHs环境行为的英文专著，具有突出的科学价值和应用指导意义。

ContentsPreface PART I SOILChapter 1 The forms and availability of PAHs in soil31.1 The forms of PAHs in soil31.1.1 Fractionation methodContentsPreface PART I SOILChapter 1 The forms and availability of PAHs in soil31.1 The forms of PAHs in soil31.1.1 Fractionation methods of PAH residues in soil41.1.2 Desorbing fraction of PAHs in soil51.1.3 Non-desorbing fraction of PAHs in soil71.1.4 Bound residues of PAHs in soil101.2 The availability of PAHs in soil121.2.1 Available fractions of PAHs in soils as a function of aging time131.2.2 Microbial degradation of available fractions of PAHs in soils151.2.3 Transformation of available fraction of PAHs to bound residue in soils171.2.4 Butanol-extraction technique for predicting the availability of PAHs in soil181.2.5 Phytoavailability of bound-PAH residues in soils18Chapter 2 Gradient distribution of PAHs in rhizosphere soil242.1 Gradient distribution of PAHs in rhizosphere soil: a greenhouse experiment252.1.1 Gradient distribution of phenanthrene and pyrene in rhizosphere262.1.2 Gradient distribution of root exudates in rhizosphere272.1.3 The correlations of PAH concentration gradient with the conc entration gradient of root exudates in rhizosphere302.2 In situ gradient distribution of PAHs in rhizosphere soil: a field study332.2.1 In situ gradient distribution of PAHs in rhizosphere soil342.2.2 Rhizosphere effects on PAH distribution in soil372.3 Rhizospheric gradient distribution of bound-PAH residues in soils402.3.1 Gradient distribution of bound-PAH residues in rhizosphere412.3.2 Mechanism of rhizospheric gradient distribution of bound-PAH residues in soils46Chapter 3 Partition of PAHs among soil， water and plant root483.1 Sorption of PAHs by soils with heavy metal co-contaminants493.1.1 Sorption isotherms of phenanthrene by soils503.1.2 Sorption of phenanthrene by heavy metal-contaminated soils523.1.3 Mechanisms of the heavy metal enhanced-sorption of phenanthrene by soils533.2 Dissolved organic matter (DOM) influences the partition of PAHs between soil and water573.2.1 Effect of inherent DOM on phenanthrene sorption by soils593.2.2 Effect of exotic DOM on phenanthrene sorption by soils633.3 Partition of polycyclic aromatic hydrocarbons between plant root and water673.3.1 Partition of phenanthrene between roots and water683.3.2 Estimation of partition coefficient of phenanthrene between root and water using a composition model703.3.3 Partition of phenanthrene between root cell walls and water71Chapter 4 Impact of root exudates on the sorption， desorption and availability of PAHs in soil734.1 Impact of PAHs on root exudate release in rhizosphere734.1.1 Impact of PAH contamination levels on root exudation in rhizosphere744.1.2 Distribution of root exudates in different layers of rhizosphere soil774.2 Impact of root exudates on PAH sorption by soils774.2.1 Root exudate component-influenced sorption of PAH by soil784.2.2 Mechanism discussions804.3 Impact of root exudates on PAH desorption from soils834.3.1 Desorption of PAHs from soils as a function of root exudate concentration844.3.2 PAH desorption by root exudates in different soils864.3.3 Effects of soil aging on PAH desorption by root exudates from soil874.3.4 Desorption of different PAHs by root exudates in soil884.3.5 Impact of root exudate components on PAH desorption in soil894.3.6 Dissolved organic matter in soils with the addition of root exudates904.4 Impact of root exudates on PAH availabilities in soils924.4.1 Impact of root exudates on n-butanol-extractable pyrene in soil934.4.2 Impact of root exudate components on the n-butanol-extractable pyrene in soil954.4.3 Mechanisms by which root exudate and its components influence PAH availa-bility in soil98Chapter 5 Low-molecular-weight organic acids (LMWOAs) influence the transport and fate of PAHs in soil1015.1 LMWOAs-influence the PAH sorption by different soil particle size fractions1025.1.1 Fractionation protocol of different soil particle size fractions1035.1.2 PAH sorption by different soil particle size fractions1065.1.3 Effects of LMWOAs on PAH sorpti

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