Selectivity recovery of molybdenum（VI） from rhenium（VII） by amine-modified persimmon waste

• Published in: 稀有金属：英文版 no. 6; pp. 502 - 508
• Main Author: Zhen-Ning Lou Ye-Xia Li Fu-Qiang Ren Qing Zhang Li Wan Zhi-Qiang Xing Shu-Liang Zang Ying Xiong
• Format: Journal Article
• Language: English
• Published: 2016
• Subjects: Cu（II）; 回收钼; 接枝改性; 柿子; 浪费; 盐酸浓度; 离子交换反应
• ISSN: 1001-0521; 1867-7185

Amine functional group was grafted to obtain modified persimmon waste gel （NH2-CPT） with the focus of development of selective recovery of molybdenum from rhenium. The adsorption behavior of the NH2-CPT gel for various metal ions at varying hydrochloric acid concen-trations was studied. It is found that the NH2-CPT exhibits high affinity for Mo（VI） and no affinity for Re（VII）, Cu（II）, Fe（III）, Mn（VII）, and Zn（II） under the operating conditions. The maximum adsorption capacity for Mo（VI） is 172 mg·g^-1, and the adsorption behavior obeys the Langmuir model. Owing to Mo（VI） as poly-anions, the adsorption mechanism of molybdenum anions could be explained as the anion exchange reactions at weak acid concentration, while neutral molecules could be explained as the complexation reactions at strong acid concentration, respectively. In addition, its excellent adsorption characteristics for Mo（VI） are confirmed by separation of Mo（VI） from Mo to Re containing industrial effluent.