Dissolution rates of jarosite-type compounds in H₂SO₄ medium: A kinetic analysis and its importance on the recovery of metal values from hydrometallurgical wastes

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• 作者：Ivá ; n A. Reyes^a ; ^b ; ^{iareyesdo@conacyt.mx} ; ^{ivanalejandro2001@hotmail.com} ; Francisco Patiñ ; o^c ; Mizraim U. Flores^d ; Thangarasu Pandiyan^e ; Roel Cruz^a ; Emmanuel J. Gutié ; rrez^a ; ^b ; Martin Reyes^f ; Ví ; ctor H. Flores^f
• 关键词：Jarosite-type compounds ; Acid dissolution ; Dissolution rates ; Kinetic analysis ; Kinetic modeling
• 刊名：Hydrometallurgy
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：167
• 期：Complete
• 页码：16-29
• 全文大小：1883 K
• 卷排序：167

文摘

It was performed a kinetic study on the dissolution of M-As jarosites (M = Na, K, NH4) in H2SO4 medium. Temperature is the variable that presented the strongest effect on the dissolution rate. The substituent in the M-site has no effect on the dissolution rates in acid medium. Results of n and Ea confirm that extreme T and pH conditions are necessary to obtain high dissolution rates. It is proposed a kinetic model that describes the dissolution process of jarosite-type compounds in acid medium.