三元复合絮凝剂对海相淤泥絮凝及污染物释放特性的影响研究  

Study on the effect of ternary composite flocculant on flocculation and pollutant release characteristics of marine phase silt

作　　者：沈尔卜 胡兴龙 卢朝阳 徐民主 李岚峰 杨武 SHEN Erbu;HU Xinglong;LU Chaoyang;XU Mingzhu;LI Lanfeng;YANG Wu(CCCC SHEC Wuhan Harbour New Material Co.Ltd.,Wuhan 430040,China;CCCC SHEC Wuhan Harbour Engineering Design&Research Co.Ltd.,Wuhan 430040,China;Hubei Key Laboratory of Advanced Materials and Reinforcement Technology Research for Marine Environment Structures,Wuhan 430040,China;China University of Geosciences(Wuhan),Wuhan 430040,China)

机构地区：[1]中交二航武汉港湾新材料有限公司,武汉430040 [2]中交武汉港湾工程设计研究院有限公司,武汉430040 [3]海工结构新材料及维护加固技术湖北省重点实验室,武汉430040 [4]中国地质大学(武汉),武汉430040

出　　处：《水道港口》2023年第6期956-962,共7页Journal of Waterway and Harbor

基　　金：国家优秀青年科学基金项目(5212200975)。

摘　　要：港湾疏浚淤泥受化工污染严重,无害化难度大。通过不同絮凝调理分析,无机絮凝剂PAC对浙江某港湾疏浚底泥有更好的电中和效果,提升底泥沉降性能,有机絮凝剂1 200万分子量APAM能显著提升底泥絮体粒径、降低上清液浊度,两者联合环保助滤剂HG按5%?0.3%?2%的投加量和配比组成三元复合絮凝剂对底泥进行调理,经隔膜压滤处理泥饼含水率为29.6%。经三元复合絮凝剂调理脱水后的泥饼粒径增大,重金属浸出风险降低,调理效果优于PAC-APAM二元体系,随着三元复合絮凝剂投加量的增加,底泥脱水尾水中的COD、NH_(3)-N和TP含量逐渐降低。三元复合絮凝剂中的环保助滤剂能降低污泥比阻,降低泥饼和尾水pH值,对底泥的絮凝脱水有一定促进作用。The harbor dredged mud was seriously polluted by chemicals,and it was difficult to make it harmless.Through the analysis of different flocculation conditioning,inorganic flocculant PAC had a better electro-neutralization effect on dredged substrate of a port in Zhejiang and improved the settling performance of the bottom mud,organic flocculant 12 million molecular weight APAM could significantly improve the particle size of the bottom mud flocs and reduced the turbidity of the supernatant,the two combined with environmental protection filter aid HG in the dosage and ratio of 5%:0.3%:2%to form a ternary composite flocculant to condition the bottom mud,and the water content of the mud cake was 29.6%after diaphragm filtering.The particle size of the dewatered mud cake after conditioning by the ternary composite flocculant increased,and the risk of heavy metal leaching decreased,and the conditioning effect was better than that of the PAC-APAM binary system.The environmental protection filter aid in the ternary compound flocculant could reduce the sludge specific resistance,lower the pH value of sludge cake and tailwater,which had a certain promotion effect on the flocculation and dewatering of bottom sludge.

关 键 词：海相淤泥 三元复合絮凝剂 调理脱水 环保助滤剂 污染物 

分 类 号：U65[交通运输工程—港口、海岸及近海工程] X703[交通运输工程—船舶与海洋工程]