Using Photovoltaic to Remove Heavy Metals from Industrial Water

Abstract

Heavy metals pollution has become a more serious environmental problem in the last several decades as a result of releasing toxic materials into the environment. The aim of this study is to develop an ecological method for the removal of Ni2+ ions from industrial wastewater by an electro coagulation method using aluminum plates and solar cell as a source of D.C current. In this study, different conditions of pH of 4, 6, 7, and 8, current densities of 0.5, 1.0, and 1.5 mA/cm2, and nickel ion concentrations of 200, 300, and 500 ppm were investigated during a period of time of 120 minutes to remove nickel ions prepared waste water by electro coagulation. The total removal of nickel ions was (97.5- 99.5%), (97- 99%), and (96.67-98.8%) for pH (4-8), current density (0.5-1.5 mA/cm2) and nickel ions concentration (200-500 ppm), respectively. The results show that the optimum condition of electro coagulation process can be obtained at pH = 8 and current density 1.5 mA/cm2 when 120 minutes were elapsed.

Bioethanol Production From Agricultural Waste: A Review

“…This resulted in a 10.9% decrease in total soluble solids (% Brix), a 12.15% reduction in sugar content, a sugar consumption decrease of 57.21 g/L, an ethanol content of 8.30%, and an ethanol yield of 68.67%. Rahman et al [60] studied the impacts of several elements on the growth and ethanol generation of yeasts isolated from natural materials. Saccharomyces cerevisiae was separated from date juice and grapes and developed on a YEPD medium.…”