净水厂污泥基复合球实现低扰动底泥覆盖的研究  

Low-disturbance Coverage of Contaminated Sediments by Composite Spheres Based on Water Treatment Plant Sludge

作　　者：李国瑞 朱伟[1] 孙继鹏 LI Guo-rui;ZHU Wei;SUN Ji-peng(College of Environment,Hohai University,Nanjing 210098,China)

机构地区：[1]河海大学环境学院,江苏南京210098

出　　处：《环境科技》2024年第4期1-7,共7页Environmental Science and Technology

基　　金：国家重点研发项目(2022YFC3202700).

摘　　要：针对目前原位覆盖材料覆盖过程中对底泥造成扰动并产生扰动释放的问题,使用净水厂污泥制作成低扰动、高吸附性能覆盖材料,并通过覆盖实验验证了其覆盖效果。结果表明,净水厂污泥可制备成低质量密度、高吸附性能的吸附球,最大吸附量可达28.91mg/L。该复合球应用于底泥原位覆盖时,投放时基本上无扰动释放。覆盖后不仅可抑制泥-水界面上TP释放,一定程度上也可抵抗风浪的冲刷,还可通过吸附性能降低水体中TP浓度。Aiming at the problem of disturbance and disturbance release to the sediment during the covering process of the current in-situ capping materials,low-disturbance,high adsorption performance covering materials were made from water purification plant sludge,and the covering effect was verified through covering experiments.The results showed that the water purification plant sludge can be prepared into low mass density,high adsorption performance adsorption ball,the maximum adsorption capacity of up to 28.91 mg/L.The composite ball applied to the in situ coverage of the sediment,basically no disturbance release when placed.The coverage not only inhibits the release of TP at the mud-water interface,but also resists wind and wave scouring to a certain extent,and also reduces the TP concentration in the water column through the adsorption performance.

关 键 词：底泥 原位覆盖 净水厂污泥 海藻酸钠复合球 底泥释放 

分 类 号：X5[环境科学与工程—环境工程]