Contribution Evaluation of Physical Hole Structure, Hydrogen Bond, and Electrostatic Attraction on Dye Adsorption through Individual Experiments

Author:

Wang Wengang12,Wang Lei12,Zhang Ming12ORCID,Yu Bo12,Li Xiaoning12,Yan Han12

Affiliation:

1. China Tiegong Investment & Construction Group Co., Ltd., Beijing 100000, China

2. China Railway Water Group Co., Ltd., Xi’an 710000, China

Abstract

Disagreements over various unanswered questions about contribution of the adsorption process and functional groups on dye adsorption still exist. The main aim of this research was to evaluate the contributions of physical hole structure, hydrogen bond, and electrostatic attraction on dye adsorption. Three ideal representatives, namely, a sponge with porous structure, P(AM) containing -CONH2 groups, and P(AANa/AM) containing -COONa groups, were chosen to evaluate the above contributions. The methylene blue (MB) removal rates of these three products were compared through individual experiments. The results revealed that physical hole structure did not play a role in decreasing dye concentration. Hydrogen bond existed in dye adsorption but did not remarkably reduce dye concentration. The excellent removal results of P(AANa/AM) demonstrated that electrostatic attraction was critical in enriching dye contaminants from the solution into solid adsorbent. The results could provide insights into the dye adsorption mechanisms for further research.

Publisher

SAGE Publications

Subject

Surfaces and Interfaces,General Chemical Engineering,General Chemistry

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