Constructed Wetland for Treating Effluent from Subtropical Aquaculture Farm

dc.contributorUniversidade Estadual Paulista (UNESP)
dc.creatorTravaini-Lima, Fernanda
dc.creatorMesquita Silva da Veiga, Marcia Andreia
dc.creatorSipauba-Tavares, Lucia Helena
dc.date2015-10-22T06:26:55Z
dc.date2016-10-25T21:16:03Z
dc.date2015-10-22T06:26:55Z
dc.date2016-10-25T21:16:03Z
dc.date2015-03-01
dc.date.accessioned2017-04-06T09:14:17Z
dc.date.available2017-04-06T09:14:17Z
dc.identifierWater Air And Soil Pollution. Dordrecht: Springer, v. 226, n. 3, 10 p. 1-10, 2015.
dc.identifier0049-6979
dc.identifierhttp://hdl.handle.net/11449/129669
dc.identifierhttp://acervodigital.unesp.br/handle/11449/129669
dc.identifierhttp://dx.doi.org/10.1007/s11270-015-2322-9
dc.identifierWOS:000351102400030
dc.identifierhttp://link.springer.com/article/10.1007%2Fs11270-015-2322-9
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/940223
dc.descriptionA free water surface flow constructed wetland (CW) was designed to evaluate the capacity of this biological treatment system, which receives wastewater from aquaculture and upflow anaerobic sludge blanket (UASB) reactors, to retain heavy metal. The purpose of this study was to determine the role of the sediment and the macrophytes Cyperus giganteus, Typha domingensis, Eichhornia crassipes, and Pontederia cordata in accumulating Al, Cd, Cr, Cu, Fe, Ni, Mn, Pb, and Zn, during the dry (winter) and rainy (summer) seasons. In general, the concentrations and mass loading of heavy metals in the outlet water were lower than in the inlet water. The highest removal efficiency rates of water (mainly mass removal) occurred in the dry season. In the rainy season, the probable low oxygen level in the upper layer of sediment resulted in a release of reduced metals into the water because of organic matter mineralization and an increase in depth. This, coupled with an increase in the hydraulic loading rate (HLR), affected the efficiency removal in this season. The metals were especially immobilized as a result of the sedimentation process and could be removed weakly via macrophyte uptake, with the exception of Mn. In addition to the sediment, which is the main compartment for heavy metal retention in the CW system, the macrophytes have the advantage of being harvested. Therefore, E. crassipes and T. domingensis, which are good metal accumulators, can be recommended for the removal of heavy metals from agricultural wastewaters.
dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.languageeng
dc.publisherSpringer
dc.relationWater Air And Soil Pollution
dc.rightsinfo:eu-repo/semantics/openAccess
dc.subjectTrace metals
dc.subjectBioaccumulation factor
dc.subjectWastewater treatment
dc.subjectRemoval efficiency
dc.titleConstructed Wetland for Treating Effluent from Subtropical Aquaculture Farm
dc.typeOtro


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