Sorption of recalcitrant phosphonates in reverse osmosis concentrates and wastewater effluents – influence of metal ions

Magnetic microparticles functionalized with tailored ZnFeZr oxyhydroxide adsorbent were used for the reversible sorption of orthophosphate and recalcitrant organo-phosphonates from wastewater. The loaded particles were harvested magnetically from water, regenerated in an alkaline solution and reused...

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Autores principales:	Asya Drenkova-Tuhtan, Emily K. Sheeleigh, Eduard Rott, Carsten Meyer, David L. Sedlak
Formato:	article
Lenguaje:	EN
Publicado:	IWA Publishing 2021
Materias:	antiscalants brackish water desalination effluent polishing eutrophication magnetic adsorbents reversible sorption Environmental technology. Sanitary engineering TD1-1066
Acceso en línea:	https://doaj.org/article/24e4535cae984156af4fcfe8accfa718
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spelling	oai:doaj.org-article:24e4535cae984156af4fcfe8accfa7182021-11-06T10:48:13ZSorption of recalcitrant phosphonates in reverse osmosis concentrates and wastewater effluents – influence of metal ions0273-12231996-973210.2166/wst.2021.026https://doaj.org/article/24e4535cae984156af4fcfe8accfa7182021-02-01T00:00:00Zhttp://wst.iwaponline.com/content/83/4/934https://doaj.org/toc/0273-1223https://doaj.org/toc/1996-9732Magnetic microparticles functionalized with tailored ZnFeZr oxyhydroxide adsorbent were used for the reversible sorption of orthophosphate and recalcitrant organo-phosphonates from wastewater. The loaded particles were harvested magnetically from water, regenerated in an alkaline solution and reused numerous times. The applicability of the technology to treat brackish water reverse osmosis concentrates was tested under controlled synthetic conditions by investigating the influence of typical metals (Ca2+, Pb2+, Cu2+) on the removal of common phosphonates (HEDP, NTMP, EDTMP), and vice versa. When present at equimolar concentrations, metal cations enhanced the adsorption of phosphonates and were co-adsorbed at pH 4.0–4.5 (with removals of 83–93% for Pb2+ and 53–73% for Cu2+), likely through ternary complex formation. In the absence of metals, at pH > pHPZC ∼ 7 (the material point of zero charge), a drop in adsorption efficiency was observed for orthophosphate and all phosphonates. Thus, at pH 7, an increased adsorbent dose (>0.1 g/L) was necessary to remove 1 mg/L NTMP-P in 30 min. The reusability and effluent polishing potential of the ZnFeZr particles was demonstrated in a pilot test with municipal wastewater throughout 55 adsorption/desorption cycles without any drop in performance. Consistent removal of the non-reactive phosphorus species to ultra-low concentrations (<0.05 mg/L Ptot) and complete orthophosphate elimination (<0.005 mg/L PO4-P) was maintained under optimal conditions.Asya Drenkova-TuhtanEmily K. SheeleighEduard RottCarsten MeyerDavid L. SedlakIWA Publishingarticleantiscalantsbrackish water desalinationeffluent polishingeutrophicationmagnetic adsorbentsreversible sorptionEnvironmental technology. Sanitary engineeringTD1-1066ENWater Science and Technology, Vol 83, Iss 4, Pp 934-947 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	antiscalants brackish water desalination effluent polishing eutrophication magnetic adsorbents reversible sorption Environmental technology. Sanitary engineering TD1-1066
spellingShingle	antiscalants brackish water desalination effluent polishing eutrophication magnetic adsorbents reversible sorption Environmental technology. Sanitary engineering TD1-1066 Asya Drenkova-Tuhtan Emily K. Sheeleigh Eduard Rott Carsten Meyer David L. Sedlak Sorption of recalcitrant phosphonates in reverse osmosis concentrates and wastewater effluents – influence of metal ions
description	Magnetic microparticles functionalized with tailored ZnFeZr oxyhydroxide adsorbent were used for the reversible sorption of orthophosphate and recalcitrant organo-phosphonates from wastewater. The loaded particles were harvested magnetically from water, regenerated in an alkaline solution and reused numerous times. The applicability of the technology to treat brackish water reverse osmosis concentrates was tested under controlled synthetic conditions by investigating the influence of typical metals (Ca2+, Pb2+, Cu2+) on the removal of common phosphonates (HEDP, NTMP, EDTMP), and vice versa. When present at equimolar concentrations, metal cations enhanced the adsorption of phosphonates and were co-adsorbed at pH 4.0–4.5 (with removals of 83–93% for Pb2+ and 53–73% for Cu2+), likely through ternary complex formation. In the absence of metals, at pH > pHPZC ∼ 7 (the material point of zero charge), a drop in adsorption efficiency was observed for orthophosphate and all phosphonates. Thus, at pH 7, an increased adsorbent dose (>0.1 g/L) was necessary to remove 1 mg/L NTMP-P in 30 min. The reusability and effluent polishing potential of the ZnFeZr particles was demonstrated in a pilot test with municipal wastewater throughout 55 adsorption/desorption cycles without any drop in performance. Consistent removal of the non-reactive phosphorus species to ultra-low concentrations (<0.05 mg/L Ptot) and complete orthophosphate elimination (<0.005 mg/L PO4-P) was maintained under optimal conditions.
format	article
author	Asya Drenkova-Tuhtan Emily K. Sheeleigh Eduard Rott Carsten Meyer David L. Sedlak
author_facet	Asya Drenkova-Tuhtan Emily K. Sheeleigh Eduard Rott Carsten Meyer David L. Sedlak
author_sort	Asya Drenkova-Tuhtan
title	Sorption of recalcitrant phosphonates in reverse osmosis concentrates and wastewater effluents – influence of metal ions
title_short	Sorption of recalcitrant phosphonates in reverse osmosis concentrates and wastewater effluents – influence of metal ions
title_full	Sorption of recalcitrant phosphonates in reverse osmosis concentrates and wastewater effluents – influence of metal ions
title_fullStr	Sorption of recalcitrant phosphonates in reverse osmosis concentrates and wastewater effluents – influence of metal ions
title_full_unstemmed	Sorption of recalcitrant phosphonates in reverse osmosis concentrates and wastewater effluents – influence of metal ions
title_sort	sorption of recalcitrant phosphonates in reverse osmosis concentrates and wastewater effluents – influence of metal ions
publisher	IWA Publishing
publishDate	2021
url	https://doaj.org/article/24e4535cae984156af4fcfe8accfa718
work_keys_str_mv	AT asyadrenkovatuhtan sorptionofrecalcitrantphosphonatesinreverseosmosisconcentratesandwastewatereffluentsinfluenceofmetalions AT emilyksheeleigh sorptionofrecalcitrantphosphonatesinreverseosmosisconcentratesandwastewatereffluentsinfluenceofmetalions AT eduardrott sorptionofrecalcitrantphosphonatesinreverseosmosisconcentratesandwastewatereffluentsinfluenceofmetalions AT carstenmeyer sorptionofrecalcitrantphosphonatesinreverseosmosisconcentratesandwastewatereffluentsinfluenceofmetalions AT davidlsedlak sorptionofrecalcitrantphosphonatesinreverseosmosisconcentratesandwastewatereffluentsinfluenceofmetalions
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Sorption of recalcitrant phosphonates in reverse osmosis concentrates and wastewater effluents – influence of metal ions

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