Batch versus continuous feeding strategies for pharmaceutical removal by subsurface flow constructed wetland

Environmental Pollution
Dong Qing ZhangSoon Keat Tan

Abstract

This study evaluated the effect of continuous and batch feeding on the removal of 8 pharmaceuticals (carbamazepine, naproxen, diclofenac, ibuprofen, caffeine, salicylic acid, ketoprofen and clofibric acid) from synthetic wastewater in mesocosm-scale constructed wetlands (CWs). Both loading modes were operated at hydraulic application rates of 5.6 cm day(-1) and 2.8 cm day(-1). Except for carbamazepine, clofibric acid and naproxen, removal in CWs was significantly (p < 0.05) enhanced under the batch versus continuous mode. For all compounds tested except naproxen, values for first-order decay constants (k) for drain and fill operation were higher than that for the continuous mode of operation. Correlation between the distribution coefficient (log D(ow)) and removal efficiencies of pharmaceutical compounds in the CWs, showed that pharmaceutical removal efficiency was significantly (p < 0.1) and inversely correlated with log D(ow) value, but not with log K(ow) value.

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Citations

Jan 1, 2013·Environmental Science and Pollution Research International·Dong Qing ZhangSoon Keat Tan
Dec 27, 2012·Chemosphere·Dong Qing ZhangSoon Keat Tan
Jan 15, 2014·Environmental Science and Pollution Research International·Aida Garcia-RodríguezVictòria Salvadó
Jul 13, 2013·Environmental Pollution·Dong Qing ZhangSoon Keat Tan
Oct 2, 2013·Environmental Pollution·Dongqing ZhangSoon Keat Tan
Nov 21, 2013·The Science of the Total Environment·Paola Verlicchi, Elena Zambello
Sep 10, 2014·The Science of the Total Environment·O F ElsayedG Imfeld
May 12, 2017·Journal of Environmental Management·Huma Ilyas, Ilyas Masih
Sep 28, 2017·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Hannele AuvinenDiederik P L Rousseau
Nov 12, 2018·Environmental Science and Pollution Research International·Alessio BarbagliRudy Rossetto
Jan 6, 2018·Environmental Science and Pollution Research International·Huma Ilyas, Ilyas Masih
Mar 12, 2017·Environmental Science and Pollution Research International·Huma Ilyas, Ilyas Masih
Sep 28, 2018·Environmental Science and Pollution Research International·Guochen LiuYangguo Zhao
Mar 12, 2020·Environmental Science and Pollution Research International·Huma Ilyas, Eric D van Hullebusch
Mar 30, 2021·Journal of Environmental Management·Nawal TaoufikNoureddine Barka
Jun 12, 2021·Water Science and Technology : a Journal of the International Association on Water Pollution Research·H IlyasE D van Hullebusch

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