Stability and durability studies of zwitterionic adsorbent coating for the removal of organic pollutants: Chemical and thermal tolerance

Abstract

The zwitterionic adsorbent coating (ZACC) was used to eliminate both cationic and anionic dyes. The ZACC was developed in a way to improve the current ordinary form of adsorbents (beads, powdery) for flexible working application especially in treating the industrial textile effluents. Since it is in a coating form, a number of factors have to be considered especially in terms of its stability and durability in wastewater. This is to prevent any detected adsorbent leaching and fast loss in treated water. This study was investigated for harsh conditions (chemical and thermal) to prove its strength. The chemical tolerance has established the stability of ZACC strip by showing a highly robust and potent structure and form even after 100 days in acidic, neutral and mix dyes solution. Result also showed the percentage removal of BG dye could attained within 87.4 - 97.1 % as increased the pH from 3 to 11. While higher removal of AR 1 obtained in acidic medium (99.4 %). The percentage weight loss obtained were 0.25 % and 0.11 % respectively for thermal stability test in drying oven and outside building.