Sorption dynamics of Co2+ and Cu2+ ions by macroreticular carboxyl cation exchanger KB-2Е-10
The authors have studied the conditions for forming sorption stationary front of Co2+ and Cu2+ to be absorbed in the dynamic mode by Na-form of cation exchanger KB-2E-10. According to the output curves data the sorption mechanism is mixed diffusive with high contribution of internal diffusion. The v...
| Main Authors: | , , |
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| Format: | Article |
| Language: | Russian |
| Published: |
Tomsk Polytechnic University
2019-05-01
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| Series: | Известия Томского политехнического университета: Инжиниринг георесурсов |
| Subjects: | |
| Online Access: | http://izvestiya-tpu.ru/archive/article/view/1331 |
| Summary: | The authors have studied the conditions for forming sorption stationary front of Co2+ and Cu2+ to be absorbed in the dynamic mode by Na-form of cation exchanger KB-2E-10. According to the output curves data the sorption mechanism is mixed diffusive with high contribution of internal diffusion. The values of the coefficient of internal diffusion of Co2+ and Cu2+ were calculated by the Turnitsky equation, coefficients of mass transfer in solution and Biot number (ratio of time scales internal and external diffusion stages of mass transfer) were calculated by the model of sorption dynamics. The value of internal diffusion coefficients for Cu2+ ions is lower than for Co2+ that corresponds to Cu2+ lower diffusion rate in sorbent. Biot value for Cu2+ is higher than for Co2+. The conclusion was made on the difference in ions diffusion rate in the sorbent due to the difference in the nature of Cu2+ and Co2+ interaction with its carboxyl groups. |
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| ISSN: | 2500-1019 2413-1830 |