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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%.
In this paper, the effects of various factors on the adsorption of Me, NH_3 and CO_2 on the adsorption of copper, nickel and cobalt in lignite alone or co-existing in ammoniacal solution were discussed, and the adsorption mechanism was discussed. The adsorption of lignite mainly was The chemical adsorption of carboxyl group and phenolic hydroxyl group in humic acid and the physical adsorption on the surface of the humic acid were studied.The order of adsorption equilibrium was NH_3, Ni, Co and Cu, the order of adsorption amount was Cu> Co> Ni> NH_3, The order of NH_3, Ni and Co, Cu almost complete elution of the metal lignite adsorbed ammonia from the metal-ammonia solution easy to loss, only a small part of the remaining in the lignite at 120 ° C to the solution The CO 2 adsorption system is physically adsorbed at <1% under normal hydrometallurgical conditions.