Waste materials as adsorbents for heavy metals removal from water: Comparative analysis of modification techniques

This study aims to investigate the effect of alkalization and chemical coupling methods on surface adsorption properties waste cotton cotton/polyester yarns. The simple cheap alkali treatment was performed using 10% 18% NaOH solution, while method involved combining yarns fly ash, sodium carboxymethyl cellulose alginate as binders. Morphological characteristics unmodified modified were analyzed by scanning electron microscopy Fourier transform infrared spectroscopy, assessed removal lead cadmium ions from aqueous solution. It found that modification with solution positively affected only yarns, increasing efficiency up 75%. On other hand, ash improves both, in removing cellulose, a binder. Using method, effective adsorbents are obtained starting yarn, which gives it added value, amount non-degradable material can be reduced criteria cleaner environment circular economy met.