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Fate of metallic engineered nanomaterials in constructed wetlands : prospection and future research perspectives

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Abstract
Metallic engineered nanomaterials (ENMs) undergo various transformations in the environment which affect their fate, toxicity and bioavailability. Although constructed wetlands (CWs) are applied as treatment systems for waste streams potentially containing metallic ENMs, little is known about the fate and effects of ENMs in CWs. Hence, literature data from related fields such as activated sludge wastewater treatment and natural wetlands is used to predict the fate and effects of ENMs in CWs and to analyze the risk of nanomaterials being released from CWs into surface waters. The ENMs are likely to reach the CW (partly) transformed and the transformations will continue in the CW. The main transformation processes depend on the type of ENM and the ambient environmental conditions in the CW. In general, ENMs are expected to undergo sorption onto (suspended) organic matter and plant roots. Although the risk of ENMs being released at high concentrations from CWs is estimated low, caution is warranted because of the estimated rise in the production of these materials. As discharge of (transformed) ENMs from CWs during normal operation is predicted to be low, future research should rather focus on the effects of system malfunctions (e.g. short-circuiting). Efficient retention in the CW and increasing production volumes in the future entail increasing concentrations within the CW substrate and further research needs to address possible adverse effects caused.
Keywords
Nanoparticle, Transformation, Wastewater, Effluent, Discharge, TSS, WASTE-WATER TREATMENT, COATED SILVER NANOPARTICLES, HORIZONTAL SUBSURFACE FLOW, ZINC-OXIDE NANOPARTICLES, SEQUENCING BATCH REACTORS, DISSOLVED ORGANIC-CARBON, AGGREGATION KINETICS, ZNO NANOPARTICLES, TREATMENT-PLANT, SCHOENOPLECTUS-TABERNAEMONTANI

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Chicago
Auvinen, Hannele, Vincent Gagnon, Diederik Rousseau, and Gijs Du Laing. 2017. “Fate of Metallic Engineered Nanomaterials in Constructed Wetlands : Prospection and Future Research Perspectives.” Reviews in Environmental Science and Bio-technology 16 (2): 207–222.
APA
Auvinen, H., Gagnon, V., Rousseau, D., & Du Laing, G. (2017). Fate of metallic engineered nanomaterials in constructed wetlands : prospection and future research perspectives. REVIEWS IN ENVIRONMENTAL SCIENCE AND BIO-TECHNOLOGY, 16(2), 207–222.
Vancouver
1.
Auvinen H, Gagnon V, Rousseau D, Du Laing G. Fate of metallic engineered nanomaterials in constructed wetlands : prospection and future research perspectives. REVIEWS IN ENVIRONMENTAL SCIENCE AND BIO-TECHNOLOGY. 2017;16(2):207–22.
MLA
Auvinen, Hannele, Vincent Gagnon, Diederik Rousseau, et al. “Fate of Metallic Engineered Nanomaterials in Constructed Wetlands : Prospection and Future Research Perspectives.” REVIEWS IN ENVIRONMENTAL SCIENCE AND BIO-TECHNOLOGY 16.2 (2017): 207–222. Print.
@article{8521347,
  abstract     = {Metallic engineered nanomaterials (ENMs) undergo various transformations in the environment which affect their fate, toxicity and bioavailability. Although constructed wetlands (CWs) are applied as treatment systems for waste streams potentially containing metallic ENMs, little is known about the fate and effects of ENMs in CWs. Hence, literature data from related fields such as activated sludge wastewater treatment and natural wetlands is used to predict the fate and effects of ENMs in CWs and to analyze the risk of nanomaterials being released from CWs into surface waters. The ENMs are likely to reach the CW (partly) transformed and the transformations will continue in the CW. The main transformation processes depend on the type of ENM and the ambient environmental conditions in the CW. In general, ENMs are expected to undergo sorption onto (suspended) organic matter and plant roots. Although the risk of ENMs being released at high concentrations from CWs is estimated low, caution is warranted because of the estimated rise in the production of these materials. As discharge of (transformed) ENMs from CWs during normal operation is predicted to be low, future research should rather focus on the effects of system malfunctions (e.g. short-circuiting). Efficient retention in the CW and increasing production volumes in the future entail increasing concentrations within the CW substrate and further research needs to address possible adverse effects caused.},
  author       = {Auvinen, Hannele and Gagnon, Vincent and Rousseau, Diederik and Du Laing, Gijs},
  issn         = {1569-1705},
  journal      = {REVIEWS IN ENVIRONMENTAL SCIENCE AND BIO-TECHNOLOGY},
  language     = {eng},
  number       = {2},
  pages        = {207--222},
  title        = {Fate of metallic engineered nanomaterials in constructed wetlands : prospection and future research perspectives},
  url          = {http://dx.doi.org/10.1007/s11157-017-9427-0},
  volume       = {16},
  year         = {2017},
}

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