褐煤自氨性溶液中吸附铜、镍、钴的物理化学研究

CIESC Journal

褐煤自氨性溶液中吸附铜、镍、钴的物理化学研究

夏光祥

中国科学院化工冶金研究所

出版日期:1985-06-25 发布日期:1985-06-25

Physical Chemistry of the Adsorption of Copper, Nickel and Cobalt from Ammoniacal Solutions by Lignite

Xia Guangxiang (Institute of Chemical Metallurgy, Academia Sinica)

Online:1985-06-25 Published:1985-06-25

摘要/Abstract

摘要： 本文讨论了褐煤对单独或共存于氨性溶液中的铜、镍、钴吸附时,各因素对Me、NH_3及CO_2吸附的影响,并对吸附机理进行了初步探讨.褐煤的吸附作用主要是其腐植酸中的羧基及酚羟基的化学吸附和其表面的物理吸附.达到吸附平衡的先后次序为NH_3、Ni、Co、Cu;吸附量的大小次序为Cu>Co>Ni>NH_3;洗脱先后次序为NH_3、Ni及Co、Cu.金属的洗脱近于完全.褐煤自金属-氨溶液中所吸附的氨易于挥损,在120℃仅有少部分尚保留于褐煤体中.对溶液中CO_2的吸附系物理性的,在通常湿法冶金条件下,其吸附量<1%.

Abstract: This paper describes in detail the effect of some factors on adsorption of Me, NH3 and CO2 from ammoniacal solutions by lignite when Cu, Ni and Co ions exist separately or simultaneously. A preliminary study is carried out on the adsorption mechanism. The adsorption by lignite is mainly physical on its surface, and chemical on the carboxylic and phenolicgroups of its humic acid. The order of affinity for lignite adsorption is NH3>Ni>Co>Cu, while the order of absorption capacity is Cu>Co>Ni> NH3. When stripping, the order is NH3>Ni>Co and Cu. Metals are fully recovered by stripping. Ammonia adsorbed by lignite from Me2+-NH3-NH4+-H2O is found easy to volatilize, only a small part remaining at 120℃. Carbon dioxide in solution is adsorbed physically on lignite, in amounts of less than 1% under ordinary hydrometallurgical conditions.

夏光祥. 褐煤自氨性溶液中吸附铜、镍、钴的物理化学研究 [J]. CIESC Journal.

Xia Guangxiang (Institute of Chemical Metallurgy, Academia Sinica). Physical Chemistry of the Adsorption of Copper, Nickel and Cobalt from Ammoniacal Solutions by Lignite[J]. .