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在海水净化过程中,絮凝是重要的中间环节,絮凝剂的品质在海水絮凝过程中起着决定作用。以Fe2(SO4)3与二甲基二烯丙基氯化铵(PDMDAAC)为原料,制备出新型无机-有机复合絮凝剂Fe2(SO4)3-PDMDAAC,用来净化渤海近岸海水,通过与单纯投加Fe2(SO4)3无机絮凝剂对比,考察对海水中污染物的去除效果。借助Turbiscan Lab分散稳定性分析仪,研究絮凝剂对海水体系动态稳定性的影响。结果表明:与Fe2(SO4)3相比,Fe2(SO4)3-PDMDAAC复合絮凝剂对海水中浊度、CODMn、TP的去除效果均有一定程度的提高,最高去除率分别为95.2%、51.6%和70.4%。通过监测海水悬浮液动态沉降过程,验证了光学评价方法可行性,并从海水稳定性角度为絮凝机理分析提供了理论依据。
In the process of seawater purification, flocculation is an important intermediate step, and the quality of flocculants plays a decisive role in the flocculation of seawater. A novel inorganic-organic composite flocculant, Fe2 (SO4) 3-PDMDAAC, was prepared by Fe2 (SO4) 3 and PDMADAAC to purify the coastal waters in the Bohai Sea. Simply adding Fe2 (SO4) 3 inorganic flocculant contrast to study the removal of pollutants in seawater. With Turbiscan Lab dispersion stability analyzer, the influence of flocculant on the dynamic stability of seawater system was studied. The results showed that compared with Fe2 (SO4) 3, the removal efficiencies of turbidity, CODMn and TP in seawater were all increased to a certain extent with Fe2 (SO4) 3-PDMDAAC composite flocculant, with the highest removal rates of 95.2% and 51.6 % And 70.4%. By monitoring the dynamic sedimentation process of seawater suspension, the feasibility of optical evaluation method was verified, and provided a theoretical basis for the analysis of flocculation mechanism from the viewpoint of seawater stability.