Removal of Chromium from Tannery Effluent Using Chitosan-Charcoal Composite

Abstract

Chitosan-charcoal composite was applied as a media to treat tannery effluent. The composite was prepared by a simple solution-evaporation method and the morphology of the prepared composite was characterized by scanning electron microscopy (SEM) and X-ray diffraction (XRD). Adsorption of chromium (Cr) was investigated by varying the contact time between adsorbate (Cr) and composite, pH of solution and dose of composite. The concentration of Cr was determined by atomic absorption spectroscopy (AAS). Removal of Cr was found to be dependent on pH and maximum adsorption was observed at pH 4.0. The optimum dose and contact time for Cr treatment was 40 g/L and 250 minutes respectively. The results showed that prepared composite can be used efficiently for the treatment of tannery wastewater containing chromium.

Low cost adsorbent for mitigation of water pollution caused by tannery effluents at Hazaribagh

“…Water quality is determined by some parameters such as bio- were acidified with 0.1 N HCl to maintain its pH at a value of 3.8 -4.0 since it is reported that adsorption is increased with an increase in pH from 2.0 to 4.0 (Siraj et al, 2012). COD of water is another important parameter to measure its quality.…”

Industrial Applications of Marine Carbohydrates

“…Hence, deprotonated hydroxyl groups can be involved in the coordination with metal ions (Lerivrey, Dubois, Decock, Micera, & Kozlowski, 1986). Chitosan-charcoal composite was applied as a media to treat tannery effluent containing chromium (Siraj et al, 2012). The deacetylated chitosan (HDC) beads, cross-linked HDC-TPP beads, and chemical cross-linked HDC-ECH were used in the adsorption behavior of anionic dye (congo red or direct red 28) and cationic dye (methylene blue or basic blue 9) (Thein Kyaw, Sander Wint, & Myo Naing, 2011).…”

A novel comparative study: synthesis, characterization and thermal degradation kinetics of a terpolymer and its composite for the removal of heavy metals

“…The composite was employed for the adsorption of chromium by various rate, pH and dose of adsorbent. The adsorption capacity was dependent on maximum pH [5]. Magnesium and coconut shell-activated carbon composite was involved to selectively remove the heavy metal ions in aqueous solution.…”