PACKED BED REACTOR SYSTEM STUDY ON THE BIOSORPTION OF Cr(VI) FROM AQUEOUS SOLUTION USING CORN COB POWDER
ABSTRACT
There is a need for a less expensive biosorbent because the current method for treating Cr(VI) uses expensive biosorbents. In this study, a packed bed column bioreactor was used to investigate the potential use of corn cob powder biomass as a bioremediation agent for the removal of Cr(VI). In a continuous system with a packed-bed reactor, the effects of operating parameters like influent Cr(VI) concentration, pH, biomass concentration, flow rate, and temperature on the removal of Cr(VI) were examined. For various flow rates, pH values, temperatures, biomass concentrations, and initial Cr concentrations, percentage removal curves were obtained (VI). It was discovered that, as predicted, these parameters had a significant impact on the adsorption of Cr(VI) to the biomass. The influent pH and temperature in particular were most
Cr(VI) reduction in the column was significantly improved by a decrease in influent pH of 2, an increase in temperature up to 70°C, and a high percentage of Cr(VI) removal.
Freundlich and Langmuir adsorption isotherms both had decent correlations with
High correlation coefficient (R2) values of 0.993 and 0.985 were seen in the data and. These findings demonstrate the potential of the adsorbent as a low-cost alternative for biosorption of wastewaters with lower Cr concentrations (VI). Finally, it has been discovered that the column packed with corncob biomass has the potential to be an effective biosorbent in the treatment of industrial waste containing Cr(VI) as well as in the removal of Cr(VI) from aqueous solutions.
CHAPTER ONE
INTRODUCTION
1.1Background of Study
Concern over the effects of environmental pollution on public health has grown over the past three decades on a global scale. According to the World Health Organization (WHO), prolonged exposure to environmental pollution is thought to be a contributing factor in about a quarter of the diseases that affect people today (WHO, 2002).
One of the major environmental risks brought on by various industrial discharges is heavy metal pollution (Wang and Chen, 2009). Numerous industrial processes, including leather tanning, chrome plating, stainless steel welding, pigment production, and nuclear weapon production, release hexavalent chromium Cr (VI) into the environment (Gonzalez et al., 2003). The two oxidation states of chromium are Cr(III) and Cr(VI), with Cr(VI) being the most toxic and linked to liver and pulmonary damage.
clogging and swelling Raji and Anirudhan (1998); Babu and Gupta (2008)
Industrial wastewater discharge is a serious socio-environmental issue that contributes to water pollution caused by the presence of specific heavy metal ions.