Microwave assisted preparation and applications of bioadsorbents for removal of metal ions from commercial samples

Environmental pollution viz water, air, sound, and land pollution, etc. have been a threat to mankind for a long. Water pollution is a major worldwide problem, but in a desert area where already a scarcity of water is there, solid and liquid wastes from different sources make the conditions ugly. Entry of toxic metals in water above a particular concentration is extremely harmful and sometimes lethal, too. In the recent years, the use of bio-adsorbents for the removal of hazardous metal ions from wastewater has been reported, few of these were found suitable whereas many were not, and further improvements and modifications are required to increase the adsorption capacity. In the present paper, the use of microwave radiation for the quick preparation of Aerva javanica based bio-adsorbent and its application for the removal of cadmium(II) and lead(II) ions from the aqueous solutions have been described. The Aerva javanica Flower adsorbent's metal absorption capability or metal uptake was investigated by batch and column experiments. The experimental stock solutions' initial metal ion concentration, agitation period, temperature, and pH were all examined factors. It investigated how these parameters affected the removal of metal ions. The results of pre-concentration and recovery of metal ions using the column method be ۹۷.۸% and ۹۷.۲% for cadmium and lead, respectively.

Keywords:

Bioadsorbent , Wastewater , Aerva javanica , Hazardous metals