mechanism of polyacrylamide-bentonite microparticulate in brazil

mechanism of polyacrylamide-bentonite microparticulate in brazil
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  • Does polymer-amended bentonite have a modification mechanism?
  • The modification mechanism, process and effect of polymer-amended bentonite were reviewed. Nonionic, cationic and anionic polymer-amended bentonite were compared. The performance of different polymer-modified barriers was introduced to illustrate their respective applicable environments.
  • What is the microstructure of polymer-bentonite mixtures?
  • As shown in Fig. 5, Tian et al. (2016) presented the microstructure of polymer-bentonite mixtures. In the SEM images, the polymer forms a three-dimensional mesh structure between the bentonite clusters and can fill the pores after contact with water.
  • What happens when polymer-amended bentonite is applied in a barrier?
  • When amended bentonite produced by the dry process is applied in barriers, polymer mainly act as fillers and binders, and the adsorption between polymer and bentonite would gradually develop under the action of groundwater. Fig. 8. Modification processes of polymer-amended bentonite: (a) Wet process, (b) Dry process.
  • Does polyacrylamide-amended bentonite have good impermeability?
  • It can be concluded that polyacrylamide-amended bentonite has excellent impermeability, with a reduction of 62.59% compared to the hydraulic conductivity of raw bentonite. The above findings could infer opposite conclusions, and the reasons might be as follows: The modification process is different.