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Batch versus continuous feeding strategies for pharmaceutical removal by subsurface flow constructed wetland.
MedLine Citation:
PMID:  22564400     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
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.
Authors:
Dong Qing Zhang; Richard M Gersberg; Junfei Zhu; Tao Hua; K B S N Jinadasa; Soon Keat Tan
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-5-4
Journal Detail:
Title:  Environmental pollution (Barking, Essex : 1987)     Volume:  167C     ISSN:  1873-6424     ISO Abbreviation:  -     Publication Date:  2012 May 
Date Detail:
Created Date:  2012-5-8     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8804476     Medline TA:  Environ Pollut     Country:  -    
Other Details:
Languages:  ENG     Pagination:  124-131     Citation Subset:  -    
Copyright Information:
Copyright © 2012 Elsevier Ltd. All rights reserved.
Affiliation:
DHI-NTU Centre, Nanyang Environment and Water Research Institute, Nanyang Technological University, N1.2-B1-02, 50 Nanyang Avenue, Singapore 639798, Singapore.
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