Department of Radiochemistry and Environmental Chemistry, Faculty of Chemistry, Institute of Chemical Sciences, Maria Curie-Skłodowska University, M. Skłodowskiej-Curie 3 Sq., 20-031 Lublin, Poland.
Analytical Laboratory, Faculty of Chemistry, Institute of Chemical Sciences, Maria Curie-Skłodowska University, M. Skłodowskiej-Curie 3 Sq., 20-031 Lublin, Poland.
Int J Mol Sci. 2021 Nov 10;22(22):12157. doi: 10.3390/ijms222212157.
The influence of the pseudoamphoteric zwitterionic surfactant cocamidopropylbetaine (CAPB) on the stabilizing flocculating properties of the aqueous suspensions of glauconite (GT) with cationic guar gum (CGG) at various pH values was investigated. The following techniques were used: turbidimetry, UV-VIS spectrophotometry, tensiometry, electrophoretic mobility measurements, SEM, CHN, XRD, and FT-IR. It was established that CGG is an effective glauconite flocculant. Moreover, the most probable mechanism that is responsible for flocculation is bridge flocculation resulting from polymer adsorption on the glauconite surface. The adsorption process is caused by electrostatic interactions between the negatively charged glauconite surface and the positively charged polymer. The amount of CGG adsorption increases with the increase of the pH, which was confirmed by the adsorption and zeta potential measurements. The addition of CAPB increases the amount of the polymer adsorption due to the formation of intermolecular polymer-surfactant complexes; however, it reduces flocculation effectiveness.
研究了两性离子表面活性剂椰油酰胺丙基甜菜碱（CAPB）在不同 pH 值下对阳离子瓜尔胶（CGG）稳定海绿石（GT）水悬浮液的稳定絮凝性能的影响。采用了浊度法、紫外可见分光光度法、张力法、电泳迁移率测量、SEM、CHN、XRD 和 FT-IR 等技术。结果表明，CGG 是一种有效的海绿石絮凝剂。此外，最有可能的絮凝机制是聚合物在海绿石表面的吸附引起的桥联絮凝。吸附过程是由带负电荷的海绿石表面和带正电荷的聚合物之间的静电相互作用引起的。通过吸附和动电位测量证实，CGG 的吸附量随 pH 值的增加而增加。由于形成了分子间聚合物-表面活性剂复合物，添加 CAPB 会增加聚合物的吸附量；然而，它会降低絮凝效果。
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