dc.contributor.author |
Senarathna, D.D.T.T.D. |
|
dc.contributor.author |
Rajapakse, R.M.G. |
|
dc.contributor.author |
Abeysooriya, K.H.D.N. |
|
dc.contributor.author |
Wijenayake, W.M.H.K. |
|
dc.date.accessioned |
2023-02-22T06:32:22Z |
|
dc.date.available |
2023-02-22T06:32:22Z |
|
dc.date.issued |
2020-01-22 |
|
dc.identifier.issn |
1391-8796 |
|
dc.identifier.uri |
http://ir.lib.ruh.ac.lk/xmlui/handle/iruor/11383 |
|
dc.description.abstract |
Eutrophication is one of the most adverse impacts of nutrient contamination of water bodies. Recent studies have shown that the primary limiting factor for eutrophication is phosphorus. We developed a vaterite polymorph of porous calcium carbonate nanoparticle to remove phosphate ions in water. These nanoparticles were synthesized using calcium acetate and sodium bicarbonate in a water-ethylene glycol media at a temperature of 100°C in a reaction time of 24 hours and characterized by the X-Ray Diffraction and the Fourier transform infrared spectroscopy which show the presence of vaterite. Particle size was 25.5 nm, and the Scanning Electron Microscopy coupled with Energy Dispersive X-Ray Analysis show the spherical vaterite nanoparticles and the presence of calcium, carbon and oxygen. The phosphate removal efficiency was tested with different concentrations of phosphate solutions (2 ppm – 80 ppm), pH levels (5 – 12), adsorbent dosages (0.05 g – 0.25g), and contact times (0 – 120 min). Ion chromatography was used to analyze phosphate in water samples. The maximum adsorption percentage of 100% was obtained with 50 mL of 2 mgL-1 phosphate solution and 0.15 g of the synthesized nanoparticle. Adsorption data were well fitted with the Langmuir adsorption isotherm model and the pseudo-second-order kinetic model with R2 of 0.99 and 0.98 (Rate constant - 0.083 gg-1min-1), respectively. Phosphate adsorption is not influenced in the presence of F-, 𝑁𝑂3− and 𝑆𝑂4−2 as phosphate shows 100% removal in the presence of them. The study presents a viable option for removing excess phosphate and controlling eutrophication. |
en_US |
dc.language.iso |
en |
en_US |
dc.publisher |
Faculty of Science, University of Ruhuna, Matara, Sri Lanka |
en_US |
dc.subject |
Adsorption |
en_US |
dc.subject |
Phosphate |
en_US |
dc.subject |
Nanoparticle and removal efficiency |
en_US |
dc.title |
Aqueous phosphate removal behavior of chemically synthesized vaterite nanoparticles: Isotherms and kinetic study |
en_US |
dc.type |
Article |
en_US |