Nur Atikah, Abdul Salim and Muhammad Abbas, Ahmad Zaini and Mohamad Ali, Fulazzaky and Mohd Hafiz, Puteh and Noorul Hudai, Abdullah and Maria, Nuid and Zainab, Mat Lazim and Noraziah, Ahmad (2022) A two-stage batch system for phosphate removal from wastewater by iron-coated waste mussel shell to assess the optimum adsorbent dosage. Journal of Water Chemistry and Technology, 44. pp. 10-20. ISSN 1934-936X. (Published)
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Abstract
High amounts of phosphate discharged in receiving water can lead to eutrophication. Once a water body is enriched with phosphate, it can prompt the growth of plants and cause algal blooms. The water body may also lose its important functions and cause adverse effects on the environment and human health. In this study, removal of phosphate from domestic wastewater treatment plant effluent was elucidated using iron-coated waste mussel shell. The phosphate adsorption by iron-coated waste mussel shell was examined with respect to initial phosphateconcentration (7 mg L–1), solution volume (0.2 L), adsorbent dosage (4–20 g), and contact time (1–5 day). The chemical composition of iron-coated waste mussel shell was analyzed using energy dispersive X-ray fluorescence spectrometer. The measurement of the specific surface area of iron-coated waste mussel shell was performed by multiple-point method according to the Brunauer, Emmett, and Teller theory. Several kinetic models (i.e., pseudo-first order and pseudo-second order) and isotherm models (i.e., Freundlich and Langmuir) were used to describe the adsorption behavior. The optimum removal efficiency of phosphate can reach at 95.7% after 120 h with the amount of iron-coated waste mussel shell used to run the experiment was 20 g and the treated effluent phosphate concentration of 0.3 mg L–1, was verified. Experimental data can be well described by pseudo-second order kinetic model (R2 > 0.99) and Freundlich isotherm model (R2 = 0.93), suggesting that chemisorption and multilayer adsorption occurred. Furthermore, a two-stage batch system was proposed to assess the optimum adsorbent dosage for phosphate removal. The two-stage system has contributed to reduce iron-coated waste mussel shell dosage by 56.94%, as compared to one-stage and thus reduced the operating cost of iron-coated waste mussel shell.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | Adsorption; Eutrophication; Isotherm model; Kinetic model; Phosphate; Two-stage batch system; mussel shell |
| Subjects: | Q Science > QA Mathematics > QA76 Computer software T Technology > TD Environmental technology. Sanitary engineering |
| Faculty/Division: | Faculty of Computer System And Software Engineering Faculty of Computing |
| Depositing User: | Pn. Hazlinda Abd Rahman |
| Date Deposited: | 15 Nov 2022 06:28 |
| Last Modified: | 15 Nov 2022 06:28 |
| URI: | http://umpir.ump.edu.my/id/eprint/34117 |
| Download Statistic: | View Download Statistics |
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