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Orthophosphate Removal from Domestic Wastewater Using Limestone and Granular Activated Carbon by Sabir Hussain; Hamidi Abdul Aziz; Mohamed Hasnain Isa; Anees Ahmad; John Van Leeuwen; Linda Zou; Simon Beecham; Muhammad Umar is a Environmental Science article available to read on EtoBox.

What is Orthophosphate Removal from Domestic Wastewater Using Limestone and Granular Activated Carbon about?

The discharge of excessive concentration of orthophosphate (PO 4 -P) ions into the receiving water causes environmental problems such as "eutrophication." The aim of the present study was to investigate the adsorption behavior of limestone (LS), granular activated carbon (GAC) and the mixture of both adsorbents for orthophosphate removal from domestic wastewater. The range of initial concentration of PO 4 -P throughout the study was between 9 and 25 mg/L. Effects of contact/settling times, pH, adsorbent dosage, initial concentration, adsorption isotherm models and kinetics were studied in batch-scale experiments while for the column experiments, the effects of flow rate, pH and initial concentration were studied. Limestone alone was shown to be an effective adsorbent which has potential to remove over 90% orthophosphate at optimum conditions. The lower initial concentration (2.5 mg PO 4 -P/L) yielded the maximum removal (94%) compared to the higher concentration (80% removal at 100 mg PO 4 -P/L). Freundlich and Langmuir isotherms provided good correlation coefficient for PO 4 -P and the data agreed with the pseudo-second-order kinetics model (R 2 N 0.95). In the up-flow column stud

Who reads Orthophosphate Removal from Domestic Wastewater Using Limestone and Granular Activated Carbon?

Author

Sabir Hussain; Hamidi Abdul Aziz; Mohamed Hasnain Isa; Anees Ahmad; John Van Leeuwen; Linda Zou; Simon Beecham; Muhammad Umar

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0011-9164)

Published

2011

Language

EN

Field

Environmental Science (Physical Sciences)