Black Citric Acid Polymer (PN) Pozzolana Activated - Na-PN-Pozzolana-CE Material Synthesis Tested As Cationic Exchanger

摘要

It was showed that black citric acid polymer (PN) have capacities to be a potential raw materials for realizing a cationic exchanger seeing that the treated water solution through PN kept a brown color of brown citric acid polymers from PN during its activations with NaOH. So, the objective of this publication was to realize not only materials and process which could clarify the brown color of the PN treated water but also to realize immediately a cationic exchanger materials with at the end a clarified transparent water. Consequently, two raw materials have been selected to do these realizations: pozzolana and black citric acid polymer (PN). The first step was to elaborate a procedure for synthesizing PN-pozzolana material founded upon water as PN’s liquid vector, pozzolana/PN weigh relationship, used pozzolana’s oxygen total atoms contents, water/pn molar relationship and water/pozzolana molar relationship. Then, PN-pozzolana was characterized by NaOH-0.05N titration enabled to value the on surface PN, the total PN dispersed, the on vacuole PN with maybe pozzolana vacuole porosity recovery rate. Also, the PN-pozzolana material was used to clarify by PN a treated water cationic exchanger according to a procedure using a PN-tubular filter with well-defined experimental conditions leading to good results. The second step was to elaborate a procedure for synthesizing Na-PN-pozzolana-CE cationic exchanger founded upon PN-pozzolana activation with NaOH as described on bibliography followed by thermic treatment. Then, Na-PN-pozzolana-CE cationic exchanger was characterized by HCl-0.049N enabled to value the total Na~(+) dispersed on PN-pozzolana and Na~(+) on surface per total PN moles ratio. Results and discussions of the thermic treatment were done seeing that there were all the time weight diminution of activated Na-PN-pozzolana thermic treated. Finally, exchange cationic tests with CaCO_(3) solution were carried-out with different contact time on these Na-PN-pozzolana-CE cationic exchanger and the Ca~(2+) contents of treated water solution was followed by EDTA-complexometric titration. Results showed clearly that not only PN-pozzolana material could clarify the brown treated water but also Na-PN-pozzolana-CE is a good cationic exchanger with a maximal Ca~(2+) retained rate capacity around 93.27 [%].