Phosphorus and sulphates removal from wastewater using copper smelter slag washed with acid

Abstract In this study, we present the performance of acid washed copper smelter slag for the adsorption of phosphates and sulphates from wastewater. The aim of the study was to investigate the removal of phosphates and sulphates from wastewater using acid washed copper smelter slag at batch scale b...

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Autores principales:	Moatlhodi Wise Letshwenyo, Gobusaone Mokokwe
Formato:	article
Lenguaje:	EN
Publicado:	Springer 2021
Materias:	Adsorption Copper smelter slag Phosphorus adsorption Sulphate adsorption Science Q Technology T
Acceso en línea:	https://doaj.org/article/b84c8eec42d44af7a0a57df3299ad21e
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spelling	oai:doaj.org-article:b84c8eec42d44af7a0a57df3299ad21e2021-11-08T10:44:25ZPhosphorus and sulphates removal from wastewater using copper smelter slag washed with acid10.1007/s42452-021-04843-72523-39632523-3971https://doaj.org/article/b84c8eec42d44af7a0a57df3299ad21e2021-11-01T00:00:00Zhttps://doi.org/10.1007/s42452-021-04843-7https://doaj.org/toc/2523-3963https://doaj.org/toc/2523-3971Abstract In this study, we present the performance of acid washed copper smelter slag for the adsorption of phosphates and sulphates from wastewater. The aim of the study was to investigate the removal of phosphates and sulphates from wastewater using acid washed copper smelter slag at batch scale by exploring influences of different variables. The leachate concentrations of copper, iron, manganese and lead released from the adsorbent were 1.8, 128.2, 0.32 and 0.20 mg L−1, respectively at pH 2. The point of zero charge was at pH 6.04, Pseudo-Second Order kinetic model described the adsorption process better with an R2 value of 0.99. The experimental maximum adsorption capacities for phosphates and sulphates were 0.51 and 0.24 mg g−1 media, respectively, and 0.96 mg P g−1 media at pH 12 and 0.39 mg g−1 media for sulphates at pH 2, respectively. The process was endothermic with temperature having insignificant impact during adsorption. The maximum adsorption capacities for thermodynamic study were 0.103 ± 0.09 and 0.046 ± 0.004 mg g−1 media respectively, for PO4 3− P and SO4 2− at 60 °C. This study showed that acid washed copper smelter slag has an improved adsorption capacity for phosphate and sulphate ions but further investigations should be conducted to find ways of further improving the adsorbent performance. Article highlights There is increase in the adsorption capacity of acid washed copper smelter slag. The adsorption capacity of phosphorus is high at pH 12 and for sulphate at pH 6. The adsorption of phosphate and sulphate ions onto acid washed slag is an endothermic process. Intraparticle diffusion was not the only rate controlling mechanisms.Moatlhodi Wise LetshwenyoGobusaone MokokweSpringerarticleAdsorptionCopper smelter slagPhosphorus adsorptionSulphate adsorptionScienceQTechnologyTENSN Applied Sciences, Vol 3, Iss 12, Pp 1-18 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Adsorption Copper smelter slag Phosphorus adsorption Sulphate adsorption Science Q Technology T
spellingShingle	Adsorption Copper smelter slag Phosphorus adsorption Sulphate adsorption Science Q Technology T Moatlhodi Wise Letshwenyo Gobusaone Mokokwe Phosphorus and sulphates removal from wastewater using copper smelter slag washed with acid
description	Abstract In this study, we present the performance of acid washed copper smelter slag for the adsorption of phosphates and sulphates from wastewater. The aim of the study was to investigate the removal of phosphates and sulphates from wastewater using acid washed copper smelter slag at batch scale by exploring influences of different variables. The leachate concentrations of copper, iron, manganese and lead released from the adsorbent were 1.8, 128.2, 0.32 and 0.20 mg L−1, respectively at pH 2. The point of zero charge was at pH 6.04, Pseudo-Second Order kinetic model described the adsorption process better with an R2 value of 0.99. The experimental maximum adsorption capacities for phosphates and sulphates were 0.51 and 0.24 mg g−1 media, respectively, and 0.96 mg P g−1 media at pH 12 and 0.39 mg g−1 media for sulphates at pH 2, respectively. The process was endothermic with temperature having insignificant impact during adsorption. The maximum adsorption capacities for thermodynamic study were 0.103 ± 0.09 and 0.046 ± 0.004 mg g−1 media respectively, for PO4 3− P and SO4 2− at 60 °C. This study showed that acid washed copper smelter slag has an improved adsorption capacity for phosphate and sulphate ions but further investigations should be conducted to find ways of further improving the adsorbent performance. Article highlights There is increase in the adsorption capacity of acid washed copper smelter slag. The adsorption capacity of phosphorus is high at pH 12 and for sulphate at pH 6. The adsorption of phosphate and sulphate ions onto acid washed slag is an endothermic process. Intraparticle diffusion was not the only rate controlling mechanisms.
format	article
author	Moatlhodi Wise Letshwenyo Gobusaone Mokokwe
author_facet	Moatlhodi Wise Letshwenyo Gobusaone Mokokwe
author_sort	Moatlhodi Wise Letshwenyo
title	Phosphorus and sulphates removal from wastewater using copper smelter slag washed with acid
title_short	Phosphorus and sulphates removal from wastewater using copper smelter slag washed with acid
title_full	Phosphorus and sulphates removal from wastewater using copper smelter slag washed with acid
title_fullStr	Phosphorus and sulphates removal from wastewater using copper smelter slag washed with acid
title_full_unstemmed	Phosphorus and sulphates removal from wastewater using copper smelter slag washed with acid
title_sort	phosphorus and sulphates removal from wastewater using copper smelter slag washed with acid
publisher	Springer
publishDate	2021
url	https://doaj.org/article/b84c8eec42d44af7a0a57df3299ad21e
work_keys_str_mv	AT moatlhodiwiseletshwenyo phosphorusandsulphatesremovalfromwastewaterusingcoppersmelterslagwashedwithacid AT gobusaonemokokwe phosphorusandsulphatesremovalfromwastewaterusingcoppersmelterslagwashedwithacid
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Phosphorus and sulphates removal from wastewater using copper smelter slag washed with acid

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