Adsorption of basic dyes on MCM-41@pyridine

Several classes of dyes are stable molecules that are resistant to degradation by light, chemical, biological and other exposures and are considered as possible carcinogens or mutagens to humans [1]. Therefore, it is necessary to reduce dye concentration in the wastewater before it is released into the marine environment. The removal of dyes from wastewater is considered to be an important application of adsorption process using dutiable adsorbent. Highly functional porous materials with high surface areas are generally used for such applications because they show excellent removal efficiency [2-4]. Therefore, in this study, we were synthesized MCM-41 and then used of [3-(2-amino ethyl amino) propyl–tri–methoxysilane modified MCM-41 with NH2 groups. Then MCM-41-NH2 used to immobilization 3-pyridinecarbaldehyde by a multistep-anchoring method, is donated MCM-41@pyridine. The synthesized compounds were characterized by XRD, FT-IR, DR-UV-Vis and BET. The adsorption of two basic dyes (Rhodamine B (RB) and Yellow 13(YD)) onto MCM-41 was studied to examine the potential of MCM-41@pyridin for the removal of dyes from water solution. The adsorption capacity of MCM-41@pyridin for the two dyes followed a decreasing order of RB∼YD. It was experimentally concluded that MCM-41@pyridin might be a good adsorbent for the removal of basic dyes from water solution.