Naslov
Manganese removal from water using combination of different cost-effective methods

Autori
Nuić, Ivona ; Kosić, Marko ; Ugrina, Marin

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Book of Abstract of the 1st DIFENEW International Student Conference / Petrović, M. ; Špánik I. ; Živančev, N. - Novi Sad : Faculty of Technical Sciences, Novi Sad, Republic of Serbia, 2021, 25-25

ISBN
978-86-6022-383-0

Skup
1st DIFENEW International Student Conference, DISC2021

Mjesto i datum
Novi Sad, Srbija, 16.12.2021. - 17.12.2021

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Manganese ; Aeration ; Chemical precipitation ; Sorption ; Natural zeolite clinoptilolite

Sažetak
Natural renewable water resources are endangered on a daily basis by anthropogenic activities, especially industry, mining and agriculture. In order to preserve natural waters as well as to ensure sufficient quantities of healthy water for human consumption, and for industrial use, increasingly strict criteria for water quality are being set. Although the manganese and iron are naturally present in aquatic environment, their increased concentrations in water can cause serious problems. They significantly influence the organoleptic properties of water, tint industrial products, and cause a number of technological problems due to formation of slimy and gelatinous biomass. Therefore, to meet certain quality requirements of water, an effective and environmentally friendly methods of water purification are necessary. A number of methods are used to remove manganese and iron from water such as oxidation, chemical precipitation followed by filtration, and adsorption/ion exchange which are often limited by high costs. However, the use of low- cost sorbents such as natural zeolites makes their use more cost-effective. Current research is focused on manganese removal from an aqueous solution of concentration 19.91 mg/L by a combination of aeration, chemical precipitation with lime at pH = 8.5, coagulation/flocculation followed by filtration, and sorption on the natural zeolite clinoptilolite by batch process. By applying combination of cost- effective methods, the overall manganese removal up to ≈ 50 % was achieved, with a residual concentration in the range 5.02 - 9.78 mg/L. Optimal results were achieved by 1 h aeration with chemical precipitation, and subsequent 40 min sorption onto natural zeolite at solid/liquid ratio of 2 g/50 mL. For reducing manganese concentration below the required level of 0.05 mg/L in water for human consumption, future studies should be focused onto aeration with alkalinisation at pH ≥ 9.5 and subsequent multistage sorption on the natural zeolite by batch and/or column method.

Izvorni jezik
Engleski

Znanstvena područja
Kemijsko inženjerstvo

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