城市清淤底泥粒径分级及其污染物分布特征  

Particle Size Classification and Pollutant Distribution Characteristics of Urban Dredging Sediments

作　　者：唐杰鹏 安俊鑫 殷从焱 陈秋梅 杨月霞 曹雁 TANG Jiepeng;AN Junxin;YIN Congyan;CHEN Qiumei;YANG Yuexia;CAO Yan(Guangdong Jianke Innovation Technology Research Institude Co.,Ltd.,Zhongshan Guangdong 528400,China;Industrial Internet Development Research Center of Liaoning Province,Shenyang Liaoning 110000,China)

机构地区：[1]广东建科创新技术研究院有限公司,广东中山528400 [2]辽宁省工业互联网发展研究中心,辽宁沈阳110000

出　　处：《辽宁科技学院学报》2024年第5期33-39,共7页Journal of Liaoning Institute of Science and Technology

摘　　要：底泥粒径分级及其污染物分布特征是疏浚底泥资源化过程中重要的背景参数。依据Udden-Wentworth分级标准,文章对某河涌浅层与深层底泥分别进行筛分,研究不同粒径范围底泥的氨氮值、有机质、pH、氧化还原电位、酸可挥发性硫化物、重金属以及硅铝比(Si/Al)等指标,并分析其分布特征。结果表明,浅层底泥主要为粗砂,占41.77%,而深层底泥则主要为细砂(占比为41.24%)与泥(占比为44.05%)。不同底泥的污染物浓度随着粒径减小均有上升的趋势,其中硫化物、重金属与有机质的变化趋势较为一致,而Si/Al在不同粒径中差异显著(0.97~2.61),说明粒径对底泥资源化及高值化利用的途径有明显的影响。The particle size classification and pollutant distribution characteristics of urban dredging sediments are important background parameters in the process of resource utilization.According to the Udden-Wentworth classification standard,shallow and deep sediment of river were screened respectively.The indexes of ammonia nitrogen,organic matter,pH,redox potential,acid volatile sulfide,heavy metals and silica-aluminum ratio(Si/Al)of sediment in different particle size ranges were studied,and the distribution characteristics were analyzed.The results showed that the shallow sediment mainly for coarse sand(41.77%),while the deep sediment is mainly for the fine sand(41.24%)mixed with mud(44.05%).The concentration of pollutant in different sediment increases with the decrease of particle size,among which the change trend of sulfide,heavy metal and organic matter are consistent,while the Si/Al of different particle size are significantly different(0.97~2.61),indicating that particle size has an obvious influence on the way of resource and high value utilization of sediments.

关 键 词：清淤底泥 资源化利用 粒径分级 重金属 硅铝比 

分 类 号：X705[环境科学与工程—环境工程]