Remediation of remazol dyes from single solute and effluent solutions using biochars derived from different green seaweeds

Abstract

Organic pollutants such as dyes released during industrial operations are one of the major reasons for the degradation of water quality However treatment technologies to remediate these high volumes of wastewaters are often not sufficient Hence the excess dye wastewater generated is usually discharged without prior treatment directly into nearby streams and rivers This activity poses a serious risk to both human life and the environment since most of the dyes are carcinogenic and non-biodegradable The use of adsorbents such as activated carbon is widely employed to separate dye molecules from wastewater However its application is hindered by high costs associated with preparation as well as problems associated with activated carbon regeneration Biochar is a popular recent alternative for the treatment of dye-bearing effluents to selectively isolate dye molecules Biochar is produced under O2 free environment pyrolysis by thermal degradation of organic components On the other hand Remazol dyes are widely used in many textile industries due to their desirable properties including attractive colour water fast and easy application methods Nevertheless during the dyeing process of cellulose fibres around half of the applied Remazol dyes may enter the wash water and these let outs are highly resistant to traditional waste water treatment methods Henceforth new techniques need to be applied for successful remediation of Remazol dye wastewaters Biochar seems to be a suitable sorbent for remediation of Remazol dyes However work done on the possibility and practicability of biochar as sorbent material for Remazol dyes are very limited newline