Pharmaceutical removal in tropical subsurface flow constructed wetlands at varying hydraulic loading rates

Zhang, Dong Qing; Gersberg, Richard M.; Hua, Tao; Zhu, Junfei; Tuấn, Nguyễn Anh; Tan, Soon Keat

doi:10.1016/j.chemosphere.2011.12.067

Cited by 97 publications

(38 citation statements)

References 22 publications

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“…Moreover, the presence of plants, producing exudates and containing microorganisms on their surfaces, aids the removal of these compounds through both biodegradation and plant uptake (Dordio et al 2010;Reinhold et al 2010). These results agree with those found by Matamoros et al (2012a) for CAFF in laboratory assays using hydroponic cultures as well as those obtained by Zhang et al (2012bZhang et al ( , 2013a in a mesocosm study planted with Scirpus sp., in which removals of[85 % were achieved. The high polarity and lack of charge at environmental pH of both ACAPh and CAFF explain their uptake by aquatic plants (Trapp 2009).…”

Section: Behaviour Of the Selected Microcontaminantssupporting

confidence: 82%

“…4a, b) except for DCF and CARB in uncovered and planted reactors, respectively, where the removal efficiencies were greater. The removal efficiencies obtained agree with the reported recalcitrance of these compounds (Matamoros and Salvadó 2012;Zhang et al 2012b). However, as stated by Andreozzi et al (2003), when some microcontaminants, such as DCF, are exposed to sunlight, they are photodegraded either by direct or indirect mechanisms, which is consistent with the higher removal efficiency observed for DCF in uncovered, light-exposed reactors.…”

Section: Poorly Degradable Compoundssupporting

confidence: 81%

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The influence of Lemna sp. and Spirogyra sp. on the removal of pharmaceuticals and endocrine disruptors in treated wastewaters

Garcia-Rodríguez

Matamoros

Fontàs

et al. 2014

Int. J. Environ. Sci. Technol.

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The presence of pharmaceuticals and endocrine-disrupting chemicals (EDCs) in wastewater treatment plant effluents is an issue of great concern due to the negative effects that these compounds may have on human health and ecosystems. The present study aims to assess the capacity of two aquatic plants (Lemna sp. and Spirogyra sp.), commonly found in polishing ponds, for removing six pharmaceutical compounds (diclofenac, acetaminophen, ibuprofen, carbamazepine, clofibric acid, and propranolol), two EDCs (17a-ethinylestradiol and bisphenol A), and one stimulant (caffeine) under laboratory-scale conditions. Planted and unplanted reactors fed with secondary-treated wastewater or ultrapure water in both covered and uncovered conditions were studied. The highest removal efficiencies, which ranged from 31 to 100 %, were achieved in uncovered planted systems containing secondary-treated wastewater after 20 days of incubation. The results demonstrated that non-charged compounds with a log Kow between 2 and 4 were affected by the presence of vegetation, probably due to their plant uptake, whereas negatively charged compounds were not. This highlights that the presence of plants in polishing ponds plays an important role in the removal of pharmaceuticals and EDCs.

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Section: Behaviour Of the Selected Microcontaminantssupporting

confidence: 82%

Section: Poorly Degradable Compoundssupporting

confidence: 81%

The influence of Lemna sp. and Spirogyra sp. on the removal of pharmaceuticals and endocrine disruptors in treated wastewaters

Garcia-Rodríguez

Matamoros

Fontàs

et al. 2014

Int. J. Environ. Sci. Technol.

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“…Therefore, it was imperative to develop alternative technologies that are economical as well as eco-friendly. In recent years, aquatic macrophytes have been used worldwide for the removal of toxic pollutants, including heavy metals and pharmaceutical products from industrial effluent and municipal wastewater (Allende et al 2011;Augustynowicz et al 2010;Bonano 2012;Caselles-Osorio and Garcia 2007;Cui et al 2011;Ghemandi et al 2007;Hua et al 2013;Langergraba 2005;Maine et al 2009;Marchand et al 2010;Ong et al 2010;Ranieri et al 2011;Saeed and Sun 2012;Tang et al 2010;Vymazal 2005;Wen et al 2010;Wojciechowska and Waara 2011;Xue et al 2010;Zhang et al 2012). Main mechanisms of removal of heavy metals by aquatic plants are plant uptake, precipitation and co-precipitation as insoluble salts, and binding to the substrate (Brix 1994;Ranieri et al 2011).…”

Section: Introductionmentioning

confidence: 99%

Effect of Phragmites australis and Typha latifolia on biofiltration of heavy metals from secondary treated effluent

Kumari

Tripathi

2014

Int. J. Environ. Sci. Technol.

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The present work deals with a promising approach for the removal of heavy metals from secondary treated wastewater using aquatic plants, which are economic and effective in separating metals from polluted water. Since the conventional sewage treatment processes were inefficient to remove heavy metals from wastewater, batch experiments of Phragmites australis, Typha latifolia and P. australis and T. latifolia grown in association and reference (unplanted) were carried out for 15 days of retention time for the removal of copper (Cu), cadmium (Cd), chromium (Cr), nickel (Ni), iron (Fe), lead (Pb), and zinc (Zn) from the secondary treated effluent. Significantly, higher removal of the heavy metals in planted set than the reference revealed role of plants in their removal (analysis of variance, p \ 0.05). Higher removal of Cr, Fe, and Zn (66.2 ± 3.5, 70.6 ± 1.2, and 71.6 ± 3.9 %) in the combination of the P. australis and T. latifolia than their individual culture suggested synergistic effect of both the plants in the removal of these metals. Positive relationship was observed between retention time and the removal of heavy metals. Mass balance equation has revealed that the loss of heavy metals in wastewater was equivalent to the net accumulation of heavy metals in plant and loss of heavy metals in natural degradation. P. australis showed higher accumulative capacities for Cu, Cd, Cr, Ni, Fe, and Pb than those of T. latifolia. The P. australis and T. latifolia grown in association might be utilized for the heavy metal removal in the tropical environment.

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“…Microbially mediated iron and manganese oxides formed in this region also have the potential for indirect oxidation or enhanced sorption of trace organic contaminants (Mendelssohn et al, 1995;Emerson et al, 1999). Rhizosphere-associated transformation appears to be an important process for trace organic contaminants in subsurface flow wetlands (Zhang et al, 2012). However, the rhizosphere may be less important in surface flow wetlands due to limited contact between the rhizosphere and flowing waters.…”

Section: Jasper Et Almentioning

confidence: 99%

Unit Process Wetlands for Removal of Trace Organic Contaminants and Pathogens from Municipal Wastewater Effluents

Jasper

Nguyen

Jones

et al. 2013

Environmental Engineering Science

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Treatment wetlands have become an attractive option for the removal of nutrients from municipal wastewater effluents due to their low energy requirements and operational costs, as well as the ancillary benefits they provide, including creating aesthetically appealing spaces and wildlife habitats. Treatment wetlands also hold promise as a means of removing other wastewater-derived contaminants, such as trace organic contaminants and pathogens. However, concerns about variations in treatment efficacy of these pollutants, coupled with an incomplete mechanistic understanding of their removal in wetlands, hinder the widespread adoption of constructed wetlands for these two classes of contaminants. A better understanding is needed so that wetlands as a unit process can be designed for their removal, with individual wetland cells optimized for the removal of specific contaminants, and connected in series or integrated with other engineered or natural treatment processes. In this article, removal mechanisms of trace organic contaminants and pathogens are reviewed, including sorption and sedimentation, biotransformation and predation, photolysis and photoinactivation, and remaining knowledge gaps are identified. In addition, suggestions are provided for how these treatment mechanisms can be enhanced in commonly employed unit process wetland cells or how they might be harnessed in novel unit process cells. It is hoped that application of the unit process concept to a wider range of contaminants will lead to more widespread application of wetland treatment trains as components of urban water infrastructure in the United States and around the globe.

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Pharmaceutical removal in tropical subsurface flow constructed wetlands at varying hydraulic loading rates

Cited by 97 publications

References 22 publications

The influence of Lemna sp. and Spirogyra sp. on the removal of pharmaceuticals and endocrine disruptors in treated wastewaters

The influence of Lemna sp. and Spirogyra sp. on the removal of pharmaceuticals and endocrine disruptors in treated wastewaters

Effect of Phragmites australis and Typha latifolia on biofiltration of heavy metals from secondary treated effluent

Unit Process Wetlands for Removal of Trace Organic Contaminants and Pathogens from Municipal Wastewater Effluents

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