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投稿时间：2020-11-09 修订日期：2020-11-17
投稿时间：2020-11-09 修订日期：2020-11-17
中文摘要: 以含PdCl3SC(NH2)2-溶液为原料，采用Fe-H2O2还原法回收溶液中的钯，研究了还原过程的机理，考察了pH、还原时间、H2O2用量和铁粉用量对还原率的影响。结果表明，铁粉被氧化后的Fe2+可催化H2O2而产生氧化能力极强的?OH自由基，该自由基对复杂的PdCl3SC(NH2)2-结构具有很强的破坏力，使稳定的PdCl3SC(NH2)2-以PdCl42-形态分离出来，提高了铁对钯的还原性能。在溶液体积20 mL，25 ℃，pH=2，H2O2用量0.10 mL/mL，反应时间60 min和铁粉用量0.50 mg/mL的条件下，钯的平均还原率可达99.25%。
Abstract:PdCl3SC(NH2)2- in solution was reduced with Fe-H2O2 to recover palladium. Mechanism of reduction was investigated. Influences of pH value, reduction time, dosage of H2O2 and iron powder on reduction rate of palladium were explored. The results show that free radical of ?OH with strong oxidation ability is produced. Free radical can destroy construction of palladium-thiourea-chlorine complex ion, which makes PdCl3SC(NH2)2- change into PdCl42- and increase reducing rate. Average reduction rate is 99.25% under the optimum conditions including volume of solution of 20 mL, pH value of 2, reduction time of 60 min, dosage of H2O2 of 0.10 mL/mL, and amount of iron powder of 0.50 mg/mL.
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基金项目:钢铁冶金及资源利用省部共建教育部重点实验室开放基金资助项目（FMRU201203）；第47批教育部留学回国人员科研启动基金资助项目
| Author Name | Affiliation | |
| Zhang bao-ping | Wuhan University of Science and Technology | zhangbaoping@wust.edu.cn |
| Shi Pei-ran | 865113493@qq.com | |
| XIAO Yun-kun | ||
| WANG Yin | ||
| ZHANG Heng |
引用文本：
张保平,师沛然,肖煜坤,王尹,张恒.铁粉-H2O2对PdCl3SC(NH2)2-的还原[J].有色金属（冶炼部分）,2021(4):58-61.
Zhang bao-ping,Shi Pei-ran,XIAO Yun-kun,WANG Yin,ZHANG Heng.Reduction of PdCl3SC(NH2)2- by Iron Powder and H2O2[J].Nonferrous Metals (Extractive Metallurgy),2021(4):58-61.
张保平,师沛然,肖煜坤,王尹,张恒.铁粉-H2O2对PdCl3SC(NH2)2-的还原[J].有色金属（冶炼部分）,2021(4):58-61.
Zhang bao-ping,Shi Pei-ran,XIAO Yun-kun,WANG Yin,ZHANG Heng.Reduction of PdCl3SC(NH2)2- by Iron Powder and H2O2[J].Nonferrous Metals (Extractive Metallurgy),2021(4):58-61.
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