采用DZ988N从复杂硫酸盐溶液中高效选择性萃取铜

1 Introduction

With the rapid economic growth and social development, the total demand for copper has been rising steadily, and will exceed copper reserves by 2050 according to the current consumption of copper [1-2]. Due to the depletion of high-grade copper mineral resources, growing attention is paid to recovering copper from low-grade ores and industrial wastes [3-5]. However, during the leaching process of copper materials, impurities will be leached into solution along with the main metal. So, further treatments including precipitation [6], ion exchange [7], membrane separation [8], selective adsorption [9], and solvent extraction are required to recover valuable metals and remove impurities from the solution [10]. Among them, solvent extraction is one of the most common methods to separate and concentrate metals in an aqueous solution. SRIVASTAVA et al [11] investigated the liquid-liquid extraction of chromium from industrial effluent with tributyl phosphate as a potential extractant. ILYAS et al [12] studied the extraction of nickel and cobalt from ammonia leaching solution of Ni-laterite ore after carbon-thermal reduction roasting by 10 vol%  LIX84-I and concluded that the selective extraction rate of nickel was more than 97% over Co at the organic-to-aqueous ratio of 1. ISHFAQ et al [13] investigated the extraction of Cr(VI) and Fe(III) from electroplating waste liquid containing Cr, Fe, Zn, and free acid of chloride medium by TBP, and converted the carcinogenic metal Cr(VI) to less-toxic metal Cr(III) after treatment with ascorbic acid.