AN APPROACH FOR CR+3 IONS RECYCLE FROM THE INDUSTRIAL WASTEWATER BY THE CHEMICAL PRECIPITATION METHODSDR HUSAM ELDIN SADIG AND MOHAMMED TABIDI
The global concern about leather industries is increasing as the leather industries expand each year. These industries face very challenging tasks with an increase in stringent pollution control regulations enforced by various bodies due to environmental concerns and human risks. Chromium salts comprise the most widely employed chemical for the tanning process in leather industries. Approximately 35% of chromium utilized in the tanning process remains as metal and is discharged to wastewater streams. The removal and recovery of this quantity of wasted chromium are necessary for environmental pollution control and economic policymaking. This paper highlights chromium recovery and reuse systems of chromium salts in tanning wastewater by using NaOH as an effective chemical precipitation method to regenerate chromium solutions, adapt chrome recovery plants and technically and economically evaluate the systems.