Removal of Sr2+ from radioactive wastewater by the composite MnO2/MCM-41
| Autor: | ZHENG Jiahao, JIANG Wei, CHEN Sili, PENG Xiaoying, WANG Jinsong, ZHANG Zhengke |
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| Jazyk: | čínština |
| Rok vydání: | 2024 |
| Předmět: | |
| Zdroj: | Gongye shui chuli, Vol 44, Iss 2, Pp 105-111 (2024) |
| Druh dokumentu: | article |
| ISSN: | 1005-829X 2023-0109 |
| DOI: | 10.19965/j.cnki.iwt.2023-0109 |
| Popis: | MnO2/MCM-41 composite was prepared by one-pot method to investigate its removal of Sr2+ from radioactive wastewater. The prepared composite were characterized by SEM，BET，FT-IR. The effects of parameters such as mass ratio，pH，adsorption time and competing ion effect of MnO2 and MCM-41 on the adsorption test were investigated. The results showed that the composite adsorbent could rapidly adsorb Sr2+ in water and reached the adsorption equilibrium in 120 min with the maximum adsorption capacity of 85.46 mg/g. The composite adsorbent had the highest adsorption capacity when the mass ratio of MnO2 and MCM-41 was 4∶1 ，and the composite adsorbent had high adsorption performance in the range of pH 4-9. In addition，the composite adsorbent maintained good adsorption capacity in the presence of Na+，K+，Mg2+ and Ca2+，and the inhibited adsorption capacity followed the order of Na+< K+< Mg2+< Ca2+. The adsorption kinetic data analysis of the pseudo-secondary model fit the adsorption data better than the pseudo-first-order model，indicating that chemisorption dominated the adsorption process. The novel MnO2/MCM-41 composite prepared for the removal of Sr2+ from radioactive wastewater had the advantages of rapid adsorption，high adsorption capacity，selectivity，and the ability to be prepared on a large scale，which made it promising to play an important role in the field of Sr2+ containing radioactive wastewater removal. |
| Databáze: | Directory of Open Access Journals |
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