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锌浸出液水热法制备纳米ZnO
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作者 曾军 陆可 +5 位作者 冷新村 张忠培 李昕 吴艳喆 叶有明 谢雪珍 《中国有色冶金》 CAS 北大核心 2024年第4期57-64,共8页
纳米ZnO是一种新型的高功能精细纳米材料,用途广泛,采用水热法制备的纳米ZnO颗粒纯度高、晶形好且操作简便;含锌二次资源的锌浸出液中杂质元素较多,对后期产品纯素的影响较大,其中除铜、镉较为关键。本文以含锌二次资源的锌浸出液为原料... 纳米ZnO是一种新型的高功能精细纳米材料,用途广泛,采用水热法制备的纳米ZnO颗粒纯度高、晶形好且操作简便;含锌二次资源的锌浸出液中杂质元素较多,对后期产品纯素的影响较大,其中除铜、镉较为关键。本文以含锌二次资源的锌浸出液为原料,采用锌粉置换除铜、镉,然后以净化后的硫酸锌溶液为锌源,分别采用氨水、碳酸钠、氢氧化钠作为沉淀剂通过水热法制备纳米ZnO,并考察不同工艺参数对纳米ZnO物相和形貌的影响,结果表明:在合适条件下,锌粉置换后浸出液中铜、镉离子浓度分别为0.039 9 mg·L^(-1)、6.416 2 mg·L^(-1),可用于制备纳米ZnO;采用氨水和碳酸钠作为沉淀剂制得的产物均为ZnO和其他晶体的混合物,属于非纯相的不规则晶体;采用氢氧化钠作为沉淀剂可制得纯相纳米ZnO,最佳制备条件为锌碱摩尔比1∶2、反应时间1 h、反应温度120℃,制得的纳米ZnO呈现棱柱结构,粒径在50~100 nm之间,颗粒尺寸分布均匀。 展开更多
关键词 锌浸出液 除铜、镉 纳米ZNO 水热法 沉淀剂 氢氧化钠 晶相
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Removal of Cadmium, Copper, and Zinc from Aqueous Solution by Activated Carbon Impregnated with 8-Hydroxyquinoline 被引量:2
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作者 T. Garoma S. Shah B. Badriyha 《Journal of Environmental Science and Engineering》 2010年第5期14-21,共8页
The removal of cadmium, copper, and zinc from aqueous solution using activated carbon impregnated with 8-Hydroxyquinoline (oxine) was investigated in this study. The study was conducted using a completely mixed batc... The removal of cadmium, copper, and zinc from aqueous solution using activated carbon impregnated with 8-Hydroxyquinoline (oxine) was investigated in this study. The study was conducted using a completely mixed batch technique. Quantitative evaluation of the experimental results showed that the adsorption capacity of oxine impregnated activated carbon was higher than that of the virgin activated carbon for the three heavy metals. For oxine impregnated activated carbon, the Freundlieh distribution coefficient, kd , values were 23, 100, and 104 times larger than those of the virgin activated carbon for cadmium, copper, and zinc, respectively. Moreover, for oxine impregnated activated carbon, the kd values followed the sequence Cu 〉 Zn 〉 Cd which aggress well with the stability constants reported in the literature for the complexation of the three heavy metals with 8-Hydroxyquinoline. 展开更多
关键词 CADMIUM COPPER ZINC activated carbon 8-Hydroxyqainoline.
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Usage of Iranian scoria for copper and cadmium removal from aqueous solutions
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作者 Sara Seyfi Amir Reza Azadmehr +1 位作者 Mahdi Gharabaghi Abbas Maghsoudi 《Journal of Central South University》 SCIE EI CAS CSCD 2015年第10期3760-3769,共10页
The competitive removal of copper and cadmium from aqueous solutions using scoria has been investigated. Scoria was characterized by various methods, such as XRD, XRF, FT-IR and SEM. The results show that scoria sampl... The competitive removal of copper and cadmium from aqueous solutions using scoria has been investigated. Scoria was characterized by various methods, such as XRD, XRF, FT-IR and SEM. The results show that scoria sample contained augite, enstatite, diopside, and olivine. These minerals were separated from each other and each mineral was then subjected to the adsorption experiments. It was found that the main absorbent constituent in scoria was augite. Finally, statistical experimental method was used to optimization of adsorption conditions(Initial concentration of copper and cadmium ions, the amount of scoria and temperature) for removal of Cu(II) and Cd(II) ions from solution in optimum conditions. The optimum conditions are obtained as follows: concentrations of Cu(II) and Cd(II) of 400×10-6 and 554×10-6, respectively; amount of scoria of 7 g; temperature of 38 ℃. Under these conditions Cu(II) and Cd(II) ions are absorbed onto the scoria more than 79% and 16%, respectively. 展开更多
关键词 SCORIA ADSORPTION REMOVAL factorial design
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