SGER: Particle Incorporation of PAH in Aquatic Environments: Implications to Fate and Transport

SGER：水生环境中 PAH 的颗粒掺入：对归宿和运输的影响

• 批准号: 0610537
• 负责人: Richard Bopp
• 金额: $ 3.36万
• 依托单位: Rensselaer Polytechnic Institute
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2006
• 资助国家: 美国
• 起止时间: 2006-02-01 至 2007-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0610537&HistoricalAwards=false
• 关键词: SGER; Particle; Incorporation; PAH; Aquatic

Our exploratory work examines the nature and origin of molecular and nanoscale interactions between polycyclic aromatic hydrocarbons (PAHs) and specific particle types (e.g., carbonaceous matter) and particle size fractions in the Lower Hudson River. Our approach is to examine the molecular and carbon isotopic compositions of PAHs in atmospheric particulates, road sweeps, water column particulates, sediments and water samples from the Lower Hudson. Additionally, we will characterize the size and compositional characteristics of all particulate and sediment samples and perform PAH-particle interaction experiments to complement our field observations. Our central hypothesis is that the PAH-particle association in the Lower Hudson is determined primarily during their co-generation (in the PAH source) and alterations that occur during their transport prior to riverine deposition, and less so by water-particle partitioning in the deposited sediments. The implication of these distinctions is not trivial, as each of these assumptions can lead to differing approaches to modeling sources, transport and fate or devising strategies for prevention, containment or remediation of the hydrophobic contaminants. The elucidation of the nature and origin of particle-PAH association is immensely critical for the broader evaluation of the natural disposition, fate and remediation of PAHs and other organic contaminants in aquatic environments. Surface water and related aquatic resources face continuing threats of contamination from by-products of industrial, agricultural, commercial and urbanization activities. Many of these toxic compounds, such as PAHs, have properties that give them a high affinity for solid and organic phases, resulting in their enrichment in particle surfaces as well as their bioaccumulation in food chains. An improved understanding of these processes will assist in controlling contaminant impacts and allow better management of the remediation of contaminated aquatic environments. This is pertinent given the recently approved plans to initiate the largest remediation project in U.S. history - the dredging of PCB-contaminated sediments in a 40-mile stretch of the Hudson River. This SGER project also has broader Educational and Partnership and supports graduate student research, and will involve undergraduate research participants, government and private research collaborators and high school students in the Hudson valley region.

我们的探索性工作研究了哈德逊河下游多环芳烃 (PAH) 与特定颗粒类型（例如碳质物质）和颗粒尺寸部分之间分子和纳米级相互作用的性质和起源。 我们的方法是检查大气颗粒物、道路清扫物、水柱颗粒物、沉积物和下哈德逊河水样中多环芳烃的分子和碳同位素组成。此外，我们将表征所有颗粒和沉积物样品的尺寸和成分特征，并进行 PAH-颗粒相互作用实验以补充我们的现场观察。 我们的中心假设是，下哈德逊河中的多环芳烃-颗粒关联主要是在它们的联产过程中（在多环芳烃源中）和在河流沉积之前的运输过程中发生的变化决定的，而较少由沉积沉积物中的水颗粒分配决定。这些区别的含义并非微不足道，因为这些假设中的每一个都可能导致对来源、运输和归宿进行建模或设计疏水性污染物的预防、遏制或补救策略的不同方法。 阐明颗粒-多环芳烃关联的性质和起源对于更广泛地评估水生环境中多环芳烃和其他有机污染物的自然处置、归宿和修复至关重要。 地表水和相关水生资源持续面临工业、农业、商业和城市化活动副产品污染的威胁。许多有毒化合物（例如多环芳烃）具有与固相和有机相具有高亲和力的特性，导致它们在颗粒表面富集以及在食物链中生物富集。更好地了解这些过程将有助于控制污染物影响，并更好地管理受污染水生环境的修复。 鉴于最近批准的计划启动美国历史上最大的修复项目——疏浚哈德逊河 40 英里的多氯联苯污染沉积物，这一点是相关的。 该 SGER 项目还拥有更广泛的教育和合作伙伴关系，支持研究生研究，并将涉及哈德逊河谷地区的本科生研究参与者、政府和私人研究合作者以及高中生。