摘要
采用湿分法将采自珠江广州河段沉积物样品分成5个粒径的组分(>500μm、500μm>>220μm、220μm>>63μm、63μm>>22μm和<22μm),样品分成2份。第一份测定其中的多环芳烃(PAHs)和有机氯农药(OCPs)进行定量分析,第二份样品的每个粒级进行重液分离,收集轻组分(有机质)和重组分(主要为无机矿物及无定型有机质)。在显微镜下对沉积物中不同粒径轻重组分的吸附剂进行鉴定,分析有机质类型和质量百分比,并测定各组分总有机碳(TOC)和碳黑的含量。结果表明,有机质类型是影响多环芳烃(PAHs)和有机氯农药(OCPs)在不同粒径组分中的分布特征和富集能力的主要因素。
Wet sieving was performed to separate the sediment into five size fractions (>500μm, 500μm>>220μm, 220μm >>63μm, 63μm>>22μm, <22μm) and further separated into low (<1.8 g/cm^3) and high (>8 g/cm^3) density fractions using a cesium chloride solution having a specific gravity of 1.8±0.05 g/cm^3. These geosorbents were characterized under microscope. Each of these size were analyzed for PAHs and OCPs. The results show the total PAHs and OCPs.Content is not significantly correlated with the TOC and black carbon content. This study illustrates that the type of organic matter plays important role on the distribution of total PAHs and OCPs. In different grain-size particles in sediments.
出处
《中国环境监测》
CAS
CSCD
北大核心
2004年第5期1-6,共6页
Environmental Monitoring in China
基金
国家自然科学基金项目(No.40272129)
广东省自然科学基金项目(No.010504)
