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Title: Batch versus continuous feeding strategies for pharmaceutical removal by subsurface flow constructed wetland
Authors: Gersberg, Richard M.
Jinadasa, K. B. S. N.
Zhang, Dong Qing
Zhu, Junfei
Hua, Tao
Tan, Soon Keat
Keywords: DRNTU::Engineering::Civil engineering
DRNTU::Engineering::Environmental engineering
Issue Date: 2012
Source: Zhang, D. Q., Gersberg, R. M., Zhu, J., Hua, T., Jinadasa, K. B. S. N., & Tan, S. K. (2012). Batch versus continuous feeding strategies for pharmaceutical removal by subsurface flow constructed wetland. Environmental pollution, 167, 124-131.
Series/Report no.: Environmental pollution
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 Dow) and removal efficiencies of pharmaceutical compounds in the CWs, showed that pharmaceutical removal efficiency was significantly (p < 0.1) and inversely correlated with log Dow value, but not with log Kow value.
DOI: 10.1016/j.envpol.2012.04.004
Fulltext Permission: none
Fulltext Availability: No Fulltext
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