# Decolorization of Corn Fiber Arabinoxylan Extract with (MN102) Resin: Adsorption Performance and Film-Forming Capacity

## TL;DR

This study explores using resin MN102 to decolorize arabinoxylan from corn fiber while maintaining its film-forming properties.

## Contribution

The first study to evaluate resin MN102 for decolorizing arabinoxylan and assess its film-forming capacity post-treatment.

## Key findings

- Resin MN102 effectively adsorbed colored compounds from arabinoxylan extract with consistent efficiency over four cycles.
- The Freundlich model best described the adsorption isotherm, and the log-Gompertz model fit the breakthrough curves well.
- Decolorized arabinoxylan retained its film-forming properties, including color, solubility, and mechanical characteristics.

## Abstract

Arabinoxylan is a polysaccharide with film-forming properties, present in corn fiber, and a low-value by-product. The extract has a deep brown color, producing films of the same shade, which may not be appealing. This study addresses, for the first time, the adsorption of colored compounds present in an arabinoxylan extract using resin MN102. The resin successfully adsorbed the colored compounds from the arabinoxylan extract. After four consecutive adsorption/desorption cycles, the efficiency of the resin was similar, only decreasing from 63.3% to 52.9%. Langmuir and Freundlich models were fitted to the results of adsorption isotherm experiments, with the Freundlich model demonstrating the best fit to the experimental results. A fixed-bed column loaded with the resin was used for the removal of the colored compounds from the arabinoxylan extract, and the effect of the volumetric flow rate was investigated. The Yan and log-Gompertz models showed the best fit to the experimental breakthrough curves. This study systematically evaluated the adsorption conditions, providing a comprehensive analysis of the performance of the resin in the removal of the colored compounds. Additionally, the ability of the extract to maintain its film-forming properties after decolorization was evaluated, and some of the film’s key characteristics were evaluated, namely its color, solubility in water and mechanical properties.