基于Zeta电位分析的滨海淤泥质吹填土泥浆絮凝试验研究
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摘要
研究了天津、连云港两地高浓度淤泥质吹填土泥浆,在添加高分子量的阳离子(CPAM)、阴离子(APAM)、非离子(NPAM)聚丙烯酰胺、聚合氯化铝(PAC)及有机、无机混合溶剂后,胶体颗粒表面Zeta电位变化过程。试验结果表明,两地吹填土电位变化过程相似,各类絮凝剂都可以使吹填泥浆形成胶体并发生沉降,且CPAM、PAC、PAC+CPAM、PAC+NPAM都能使吹填土颗粒表面Zeta电位发生正负改变,泥水分离现象明显,PAC+NPAM组合絮凝效果最为理想。Zeta电位位于0~4.927区间内时,最有利于泥浆絮凝。
In this paper, the Zeta potential change process on colloid particles′ surface of mud with high con-centration and muddy dredger fill in Tianjin and Lianyungang was studied after adding high molecular weightCPAM, APAM, NPAM, PAC, organic and inorganic mixed solvent. The test results show that potential changes ofdredger fill in the two places are similar. All kinds of flocculants can make hydraulic fill slurry form colloid andcause settlement, and CPAM, PAC, PAC+CPAM, PAC+NPAM can make Zeta potential on colloid particles′ surfaceof dredger fill change between positive and negative. Slurry separation is obvious, and the combined flocculation ofPAC+NPAM is the most ideal. When the Zeta potential is between 0 and 4.927, it is beneficial to slurry flocculate.
In this paper, the Zeta potential change process on colloid particles′ surface of mud with high con-centration and muddy dredger fill in Tianjin and Lianyungang was studied after adding high molecular weightCPAM, APAM, NPAM, PAC, organic and inorganic mixed solvent. The test results show that potential changes ofdredger fill in the two places are similar. All kinds of flocculants can make hydraulic fill slurry form colloid andcause settlement, and CPAM, PAC, PAC+CPAM, PAC+NPAM can make Zeta potential on colloid particles′ surfaceof dredger fill change between positive and negative. Slurry separation is obvious, and the combined flocculation ofPAC+NPAM is the most ideal. When the Zeta potential is between 0 and 4.927, it is beneficial to slurry flocculate.
引文
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[2]Byung Sik Chun,Jin Chun Kim.A Study on the Soil Improvement Properties of FGC Stabilizing Agent[C]//ISRM.International Symposium.Melbourne Australia:Proceedings of Geo.Tech.,2000.
[3]李敏,宗栋良.混凝中Zeta电位的影响因素[J].环境科技,2010,23(3):9-11.LI M,ZONG D L.Influence on Zeta Potential in Coagulation[J].Environmental Science&Technology,2010,23(3):9-11.
[4]刘惠君.电位作为无机混凝剂水处理性能评价指标的可行性实验研究[J].水处理技术,2002,28(2):78-81.LIU H J.Study ofζPotential as evaluating Index of Coagulants Treatment Capacity[J].Technology of Water Treatment,2002,28(2):78-81.
[5]Radoiu M T,Martin D I,Calinescu I,et al.Preparation of polyelectrolytes for wastewater treatment[J].Journal of Hazardous Materials,2004,106:27-37.
[6]徐浩淼,夏珏良.基于Zeta电位的污水混凝降浊条件优化[J].上海工程技术大学学报,2012,26(4):294-297.XU H M,XIA Y L.Optimization of Sewage Coagulation Turbidity-Reduction Conditions Based on Zeta Potential[J].Journal of Shanghai University of Engineering Science,2012,26(4):294-297.
[7]钟世云,李晋梅.掺黏度改性剂与减水剂水泥浆的zeta电位研究[J].建筑材料学报,2012,15(6):735-740.ZHONG S Y,LI J M.Study on Zeta Potential of Cement Pastes with Viscosity Modifying Admixtures and Superplasticizers[J].Journal of Building Materials,2012,15(6):735-740.