Phosphorus Removal from Wastewater Using Oven-Dried Alum Sludge
The present study deals with the removal of phosphorus from wastewater by using oven-dried alum sludge (ODS) as adsorbent that was collected from Al-Qadisiya treatment plant (Iraq); it was heated in an oven at 105∘C for 24 h and then cooled at room temperature. The sludge particles were then crushed...
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Online Access: | http://dx.doi.org/10.1155/2012/125296 |
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doaj-b42ad03222c4468b886051856dc1818a2021-07-02T01:44:30ZengHindawi LimitedInternational Journal of Chemical Engineering1687-806X1687-80782012-01-01201210.1155/2012/125296125296Phosphorus Removal from Wastewater Using Oven-Dried Alum SludgeWadood T. Mohammed0Sarmad A. Rashid1Chemical Engineering Department, College of Engineering, University of Baghdad, Baghdad, IraqChemical Engineering Department, College of Engineering, University of Baghdad, Baghdad, IraqThe present study deals with the removal of phosphorus from wastewater by using oven-dried alum sludge (ODS) as adsorbent that was collected from Al-Qadisiya treatment plant (Iraq); it was heated in an oven at 105∘C for 24 h and then cooled at room temperature. The sludge particles were then crushed to produce a particle size of 0.5–4.75 mm. Two modes of operation are used, batch mode and fixed bed mode, in batch experiment the effect of oven-dried alum sludge doses 10–50 g/L, pH of solution 5–8 with constant initial phosphorus concentration of 5 mg/L, and constant particle size of 0.5 mm were studied. The results showed that the percent removal of phosphorus increases with the increase of oven-dried alum sludge dose, but pH of solution has insignificant effect. Batch kinetics experiments showed that equilibrium time was about 6 days. Adsorption capacity was plotted against equilibrium concentration, and isotherm models (Freundlich, Langmuir, and Freundlich-Langmuir) were used to correlate these results. In the fixed bed isothermal adsorption column, the effect of initial phosphorus concentration (𝐶𝑜) 5 and 10 mg/L, particle size 2.36 and 4.75 mm, influent flow rate (Q) 6 and 10 L/hr, and bed depth (H) 0.15–0.415 m were studied. The results showed that the oven-dried alum sludge was effective in adsorbing phosphorus, and percent removal of phosphorus reaches 85% with increasing of contact time and adsorbent surface area (i.e., mass of adsorbent 50 g/L with different pH).http://dx.doi.org/10.1155/2012/125296 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Wadood T. Mohammed Sarmad A. Rashid |
spellingShingle |
Wadood T. Mohammed Sarmad A. Rashid Phosphorus Removal from Wastewater Using Oven-Dried Alum Sludge International Journal of Chemical Engineering |
author_facet |
Wadood T. Mohammed Sarmad A. Rashid |
author_sort |
Wadood T. Mohammed |
title |
Phosphorus Removal from Wastewater Using Oven-Dried Alum Sludge |
title_short |
Phosphorus Removal from Wastewater Using Oven-Dried Alum Sludge |
title_full |
Phosphorus Removal from Wastewater Using Oven-Dried Alum Sludge |
title_fullStr |
Phosphorus Removal from Wastewater Using Oven-Dried Alum Sludge |
title_full_unstemmed |
Phosphorus Removal from Wastewater Using Oven-Dried Alum Sludge |
title_sort |
phosphorus removal from wastewater using oven-dried alum sludge |
publisher |
Hindawi Limited |
series |
International Journal of Chemical Engineering |
issn |
1687-806X 1687-8078 |
publishDate |
2012-01-01 |
description |
The present study deals with the removal of phosphorus from wastewater by using oven-dried alum sludge (ODS) as adsorbent that was collected from Al-Qadisiya treatment plant (Iraq); it was heated in an oven at 105∘C for 24 h and then cooled at room temperature. The sludge particles were then crushed to produce a particle size of 0.5–4.75 mm. Two modes of operation are used, batch mode and fixed bed mode, in batch experiment the effect of oven-dried alum sludge doses 10–50 g/L, pH of solution 5–8 with constant initial phosphorus concentration of 5 mg/L, and constant particle size of 0.5 mm were studied. The results showed that the percent removal of phosphorus increases with the increase of oven-dried alum sludge dose, but pH of solution has insignificant effect. Batch kinetics experiments showed that equilibrium time was about 6 days. Adsorption capacity was plotted against equilibrium concentration, and isotherm models (Freundlich, Langmuir, and Freundlich-Langmuir) were used to correlate these results. In the fixed bed isothermal adsorption column, the effect of initial phosphorus concentration (𝐶𝑜) 5 and 10 mg/L, particle size 2.36 and 4.75 mm, influent flow rate (Q) 6 and 10 L/hr, and bed depth (H) 0.15–0.415 m were studied. The results showed that the oven-dried alum sludge was effective in adsorbing phosphorus, and percent removal of phosphorus reaches 85% with increasing of contact time and adsorbent surface area (i.e., mass of adsorbent 50 g/L with different pH). |
url |
http://dx.doi.org/10.1155/2012/125296 |
work_keys_str_mv |
AT wadoodtmohammed phosphorusremovalfromwastewaterusingovendriedalumsludge AT sarmadarashid phosphorusremovalfromwastewaterusingovendriedalumsludge |
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