Situation on of Purifying and Comprehensive Utilizing Mineral Processing Lead Wastewater and its Development Trend in Nonferrous Metal Ore Mining

摘要

In this study, the affecting factors order of Pb~(2+) adsorbing Co_3O_4 is: the initial concentration > time> temperature> pH, under the conditions that initial concentration is 150 mg / L, 30 °C, pH value is 5.5 and oscillation of 60 min, the absorption is the best. The quasi-second order kinetics model can appropriately explain dynamic process of Nano Co_3O_4 adsorbing Pb~(2+), and the Langmuir equation can be the best explanation of isothermal adsorption processs. Through energy spectrum and infrared spectrum, it can be found that the process of Co_3O_4 adsorbing Pb~(2+) is mainly chemical absorption process. The concentration of Pb (II) of mine wastewater reach the first class of irrigation water quality standards after the first time of adsorption treatment, and reach the first class of fishery water quality standard after the second treatment.