Characterization and application of chicken eggshell as green adsorbents for removal of H2S from wastewaters

Abstract

Hydrogen sulfide is fatal to benthic aquatic lives as depletes the dissolved oxygen in their ecosystem. The present work evaluated on characterization and the application of chicken eggshell as green and economical adsorbents for the treatment of hydrogen sulfide from wastewaters. The grounded chicken eggshell were characterized into calcinate waste eggshell; activate carbon derived from wastes of eggshell (modified adsorbents) and eggshell without treatments (unmodified adsorbent). At the 250 mg/l concentration of polluted water, the results showed that the calcinate waste eggshell had the highest adsorption capacity of 2.1 mgg-1 and the equilibrium time of 250 minutes. The adsorption capacity of activate carbon derived from wastes of eggshell was 1.6 mgg-1 and the equilibrium time of 350 minutes. The eggshell without treatments at of 0.55 mgg-1 and the equilibrium times was 400 minutes. It is concluded that the chickens' eggshell are very useful green and economic adsorbents due to their availability and absence of any toxic and hazardous constituent's elements from all adsorbents. The calcinate modified been the most suitable followed by the activate carbon modified adsorbent. The grounded chicken eggshell without treatments was the least suitable for the removal of H 2 S from wasters.