The Efficiency of Copper-Supported Pumice in Removing Tetrachloroethylene from Aqueous Solutions

Tetrachloroethylene is a chlorinated aliphatic hydrocarbon, which is widely used in many industrial processes. Efficient filtration of industrial wastewater containing tetrachloroethylene is an environmental necessity. The aim of this experimental study was to determine the efficiency of copper-supported pumice in removing tetracholoroethylene from aqueous solutions. This experimental study was performed, using granules of pumice stone (about 4 mesh, 4.8 mm). The pumice was coated by copper sulfate and was prepared as an absorbent at doses of 1, 2, and 3 g/L. The study was performed on samples containing tetracholoroethylene at 3 concentrations (25, 75, and 125 mg/L) by considering four contact times (20, 40, 60, and 80 minutes) and 3 pH ranges (3, 7, and 11). The structural study of SEM images (with an accuracy of 100 micrometers) of copper-supported pumice indicated cavities with a more or less homogenous pattern. Removal of tetrachloroethylene was a function of the absorbent dose and tetrachloroethylene concentration. The maximum capacity to remove tetrachloroethylene by copper-supported pumice was 120.86 mg/g. Also, the minimum and maximum of tetrachloroethylene removal by copper-supported pumice were 80% and 99.7%, respectively. The results showed that copper-supported pumice was efficient in removing tetrachloroethylene. Considering the availability, cost-effectiveness, high absorption, and reuse of pumice, this stone can be used for removing industrial wastewater containing tetrachloroethylene.