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Characterization of a Polyacrylamide Solution Used for Remediation of Petroleum Contaminated Soils

机译：用于修复石油污染土壤的聚丙烯酰胺溶液的表征

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摘要

Biopolymers are viewed as effective and eco-friendly agents in soil modification. This study focuses on the wettability analysis of polyacrylamide (PAM) solutions for soil remediation. The contact angle, surface tension, and viscosity of PAM solutions were experimentally evaluated in air- and decane-biopolymer solution systems. Furthermore, a micromodel was used to investigate the pore-scale displacement phenomena during the injection of the PAM solution in decane and or air saturated pores. The contact angle of the PAM solution linearly increases with increasing concentration in air but not in decane. The surface tension between the PAM solution and air decreases at increasing concentration. The viscosity of the PAM solution is highly dependent on the concentration of the solution, shear rate, and temperature. Low flow rate and low concentration result in a low displacement ratio level, which is defined as the volume ratio between the injected and the defended fluids in the pores. The displacement ratio is higher for PAM solutions than distilled water; however, a higher concentration does not necessarily guarantees a higher displacement ratio. Soil remediation could be conducted cost-efficiently at high flow rates but with moderate concentration levels.
机译：生物聚合物被视为土壤改良的有效和生态友好剂。这项研究的重点是用于土壤修复的聚丙烯酰胺（PAM）溶液的润湿性分析。在空气和癸烷生物聚合物溶液系统中，通过实验评估了PAM溶液的接触角，表面张力和粘度。此外，使用微模型研究了在癸烷和/或空气饱和孔中注入PAM溶液期间的孔尺度位移现象。 PAM溶液的接触角随空气中浓度的增加而线性增加，而癸烷中的浓度则没有。 PAM溶液和空气之间的表面张力随着浓度的增加而降低。 PAM溶液的粘度高度取决于溶液的浓度，剪切速率和温度。低流速和低浓度导致低的驱替比水平，这被定义为孔隙中注入流体与保护流体之间的体积比。 PAM溶液的置换率比蒸馏水高。然而，较高的浓度并不一定保证较高的置换率。高流量但浓度适中的土壤修复可以经济高效地进行。

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