COMPARISON OF REVERSE OSMOSIS AND HYBRID SORPTION-MICROFILTRATION METHOD OF ARSENIC COMPOUNDS REMOVAL - Scientific conference
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COMPARISON OF REVERSE OSMOSIS AND HYBRID SORPTION-MICROFILTRATION METHOD OF ARSENIC COMPOUNDS REMOVAL

08.06.2022 15:23

[3. Technical sciences]

Author: Litynska Marta, PhD, National Technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic Institute”, Kyiv; Nosovska Olha, student, National Technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic Institute”, Kyiv


Arsenic-containing compounds are the dangerous pollutants that are widely present in natural waters [1]. There are various methods of arsenic compounds removal from water, including coagulation, ion exchange, chemical precipitation, adsorption, reverse osmosis, etc. [1-3]. Combination of fine particle iron oxyhydroxide and microfiltration membrane demonstrates high efficiency both for surface water and groundwater [1-2]. But if we want to prove the feasibility of using hybrid sorption-microfiltration method, it should be compared with other already common method of water treatment.

Reverse osmosis is most popular method of arsenic removal from natural water, especially groundwater. Reverse osmosis allows to achieve a safe level of residual arsenic, but it has a number of disadvantages (Table 1), including the formation of significant volumes of concentrate, which in the case of drinking water is usually discharged to city sewer. Also, reverse osmosis requires some pre-treatment devices due to strict requirements for raw water quality, while the hybrid sorption-microfiltration method does not impose such requirements. Only in the case of very high turbidity of raw water hybrid sorption-microfiltration method may require pre-treatment in the form of a mechanical filter to reduce backwash frequency.

Application of reverse osmosis requires the usage of powerful pumps, while the hybrid sorption-microfiltration method does not require high pressure. Also hybrid method is more environmentally friendly due to the formation of less hazardous waste.

Table 1. Comparison of reverse osmosis and hybrid method





References

1. Litynska, M., Dontsova, T., Yanushevska, O., Tarabaka, V. Development of iron-containing sorption materials for water treatment from arsenic compounds. Eastern-European Journal of Enterprise Technologies, 2021, 2 (10 (110)), 35–42. 

https://doi.org/10.15587/1729-4061.2021.230216

2. Litynska, M., Dontsova, T. Suspension sorbents for removal of arsenic compounds and humates from water. Вода та водоочисні технології. Науково-технічні вісті, 2020, 3 (28), 14-25. https://doi.org/10.20535/wptstn.v28i3.218046

3. Litynska, M., Gusak, A., Tolstopalova, N., Astrelin, I. Arsenic-containing wastes of water treatment: possible ways of utilization. Вода і водоочисні технології. Науково-технічні вісті, 2019, 2(25), P. 5-12. https://doi.org/10.20535/2218-93002522019187942




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