Conversion of pre-consumer cotton textile waste and jute sliver waste into adsorbent for removal of dyes from textile effluent and valorization of textile waste into bioenergy

Abstract

The textile industry produces a considerable amount of processing waste that is dumped in landfills rather than recycling. Textile wastewater comprises a variety of hazardous and non-biodegradable dyes. This study investigated the decolorization process of three different model dye pollutants (vat dye, reactive dye, methylene blue), and industrial wastewater treatment by mixing of pre-consumer cotton textile waste (PCTW) and jute sliver waste (JSW) based adsorbent as well evaluated the bioenergy potentially of that waste. The adsorbent was produced by thermal treatment method at 750ºC with 30 min reaction time. The particle size, surface functional group, and surface morphology of the adsorbent were investigated using a laser particle size analyzer, FTIR spectroscopy, and FESEM imaging. The maximum dye removal efficiency was found of 80.39 % for methylene blue (MB) and 82.97 % for industrial wastewater by 1:1 (PCTW: JSW) adsorbent. The removal efficiency of real textile wastewater quality parameters was found between 88.68–94.69 % by 1:1 adsorbent. The 1:1 adsorbent brought the highest adsorption capacity of 502.45 mg g⁻¹ for MB. The adsorption kinetic model was more favorable with the Elovich model. The Van Krevelen diagram showed that PCTW and JSW waste biomass had the potential to be used for bioenergy production. The elemental analysis revealed that biomass had an energy value in the range of 14.70–15.54 MJ kg⁻¹. The Tanner diagram displayed that biomass had self-supporting incineration properties. Hence, this study established a low-cost solution of textile wastewater treatment and bioenergy production potential that may support the circular economy.