|1Dulneva, TYu. |
1A. V. Dumansky Institute of Colloid and Water Chemistry of the NAS of Ukraine, Kyiv
|Dopov. Nac. akad. nauk Ukr. 2019, 9:105-111|
The high efficiency of the process of joint water purification from Fe(ІІІ) and Mn(ІІ) compounds modified by them in the dynamic mode by a microfiltration ceramic membrane made of clay minerals is shown, and the steric mechanism of its action based on the difference in the pore sizes of the membrane and particles of Fe(ІІІ) and Mn(ІІ) compounds is justified. It has been established that such modification increased the retention capacity of the ceramic membrane to Mn(II) compounds. The influence of various technological factors on the characteristics of this process is studied. The negative effect of chlorides on the retention capacity of such modified membrane and a levelling role in this process of self-forming DM has been revealed. It has been established that the simultaneous purification of water from Fe(III) and Mn(III) compounds to their MPC in drinking water is expedient at the initial concentration of Fe(ІІІ) and Mn(ІІ), respectively, up to 42.3 and 4.0 mg/dm3, pH 8.3—8.4, operating pressure of 1.0 MPa, and a duration of the experiment of 120 min.
|Keywords: ceramic membrane, compounds of Fe(III) and Mn(II), dynamic modification, microfiltration|
1. Goncharuk, V. V. (Ed.). (2005). Ecological aspects of modern technologies for the protection of the aquatic environment. Kyiv: Naukova Dumka (in Russian).
2. Belousov, A. P. (2001). Groundwater quality: modern approaches to assessment. Moscow: Nauka (in Russian).
3. Orlov, V. O. (2008). Disinfection of groundwater by aeration and filtration. Rivne: NUVGP (in Ukrainian).
4. DSTU 7525: 2014. Drinking water. Requirements and methods of quality control. Kyiv, 2014 (in Ukrainian).
5. Mamchenko, A. V., Savchenko, O. A., Chernova, N. N. & Yakupova, I. V. (2012). Groundwater purification from manganese compounds using a natural sorbent-catalyst. Khimiya i tekhnologiya vody, 34, No. 4, pp. 285-295 (in Russian). doi: https://doi.org/10.3103/S1063455X12040017
6. Minaeva, L. A. & Dudarev, V. I. (2014). Modern methods of natural and waste water demanganization. Izv. VUZOV. Prikl. Khimiya i Biotekhnologiya, No. 5, pр. 78-81 (in Russian).
7. TU U 29.2-05417348-014: 2014 “Kerama” ceramic membranes. Kyiv, 2015 (in Ukrainian).
8. Lurie, Yu. Yu. (1973). Unified methods of water analysis. Moscow: Khimiya (in Russian).
9. Alemasova, A. S., Rokun, A. N. & Shevchuk, I. A. (2003). Analytical atomic absorption spectroscopy. Donetsk (in Russian).
10. Kocharov, R. G. (2007). Theoretical foundations of reverse osmosis. Moscow: RHTU im. D.I. Mendeleeva (in Russian).
11. Mulder, M. (1999). Introduction to membrane technology. Moscow: Mir (in Russian).
12. Yudovich, Ya. E. & Ketris, M. P. (2013). Manganese geochemistry in hypergenesis processes: review. Biosfera, 5, No. 1, pp. 21-36 (in Russian).