Geležies Paplavų Panaudojimas Fosfatų Pašalinimui Iš Pūdyto Dumblo Vandens

Many countries are confronted with a striking problem of morbidity of fluorosis that appears because of an increased concentration of fluorides in drinking water. The objective of this study is to explore opportunities for removal of fluoride from aqueous solutions using cheap and easily accessible adsorbents, such as exhaustive coffee grounds and iron sludge and to establish the efficiency of fluoride removal. Twelve doses (1, 2, 3, 4, 5, 6, 10, 20, 30, 40, 50 and 60 g/L) of adsorbents were used and five durations of the sorption process (30, 60, 90, 120 and 150 min). The results showed that the most optimum dose of iron sludge for 3 mg/L of fluoride removal was 30 g/L and the contact time was 30 min, the efficiency of fluoride removal achieved 62.92%; the most optimum dose of exhausted coffee grounds was 60 g/L with the most optimum contact time of 60 min; at a dose of 50 g/L with contact time of 90 min, the efficiency of fluoride removal achieved 56.67%. Findings demonstrate that adsorbents have potential applicability in fluoride removal up to the permissible norms.

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“…Iron hydroxide Fe(OH) 3 is a major constituent of iron sludge. Iron oxides are obtained by heat treatment of iron hydroxide [56]:…”

Section: Introductionmentioning

confidence: 99%

Removal of Fluorides from Aqueous Solutions Using Exhausted Coffee Grounds and Iron Sludge

Siaurusevičiūtė

Albrektienė

2021

Water

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Švino Šalinimo Iš Vandens Naudojant Alternatyvius Sorbentus Tyrimas

Pavlovska¹,

Albrektienė²,

Paliulis³

2018

Proceedings of the 21th Conference for Junior Researchers „Science – Future of Lithuania“

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Švinas yra sunkusis metalas, pasižymintis stipriomis toksinėmis savybėmis. Šio elemento randama nuotekose, o kartais ir geriamajame vandenyje. Straipsnyje nagrinėjamas švino šalinimas iš vandens, naudojant sorbcijos procesą, norint nustatyti efektyviausiai šviną šalinantį sorbentą. Tyrime naudoti trys sorbentai: molis, sapropelis ir geležies paplavos. Nustatyta, kad molis šviną pašalina 47–91 % efektyvumu, naudojant sapropelį pasiekiamas 94–99 % švino pašalinimas, o naudojant geležies paplavas švino pašalinimo efektyvumas pasiekiamas – 72–99 %. Atlikti tyrimai parodė, kad efektyviausiai šviną iš tiriamojo vandens šalina sapropelis. Naudojant skirtingas sapropelio kiekius ir esant skirtingai kontako trukmei, švino koncentracija tiriamajame vandenyje po valymo neviršija leistinų geriamojo vandens normų (0,01 mg/l), todėl sorbcijai galima naudoti mažiausią sapropelio kiekį – 1 g/l. Efektyviausias švino išvalymas pasiekiamas, kai kontakto trukmė – 150 min.

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Geležies Paplavų Panaudojimas Fosfatų Pašalinimui Iš Pūdyto Dumblo Vandens

Cited by 2 publications

References 11 publications

Removal of Fluorides from Aqueous Solutions Using Exhausted Coffee Grounds and Iron Sludge

Removal of Fluorides from Aqueous Solutions Using Exhausted Coffee Grounds and Iron Sludge

Švino Šalinimo Iš Vandens Naudojant Alternatyvius Sorbentus Tyrimas

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