Title: REDUCTION OF THE CATION-EXCHANGE CAPACITY OF MONTMORILLONITE BY TAKE-UP OF HYDROXY-A1 POLYMERS 1
Abstract:The cation-exchange capacity (CEC) of Na-A1- and Ca-Al-montmorillonite after neutralization with NaOH or Ca(OH)2 was studied at three A1 levels: I0, 25, and 50% of the CEC. Hydroxy-A1 polymers were ef...The cation-exchange capacity (CEC) of Na-A1- and Ca-Al-montmorillonite after neutralization with NaOH or Ca(OH)2 was studied at three A1 levels: I0, 25, and 50% of the CEC. Hydroxy-A1 polymers were effective in reducing the CEC of Na-montmorillonite (by more than 46%), the exact effectiveness being dependent on the hydroxy-A1 content. The hyclroxy-A1 polymers were less effective in reducing the CEC of Ca-montmorinonite (less than 26%). The CEC reduction was equal to or larger than the amount of the untitrated A1. The electrostatic charges of the clay which were blocked by the hydroxy-A1 polymers were compensated for by both the positive charge of the hydroxy-A1 polymers and the trapped cations on the clay surfaces. These cations remained on the clay even after extensive washing with 0.1 M KC1.Read More
Publication Year: 1986
Publication Date: 1986-01-01
Language: en
Type: article
Access and Citation
AI Researcher Chatbot
Get quick answers to your questions about the article from our AI researcher chatbot