کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1058102 947104 2009 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Influence of vegetation on the removal of heavy metals and nutrients in a constructed wetland
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی انرژی های تجدید پذیر، توسعه پایدار و محیط زیست
پیش نمایش صفحه اول مقاله
Influence of vegetation on the removal of heavy metals and nutrients in a constructed wetland
چکیده انگلیسی

A free water surface wetland was built to treat wastewater containing metals (Cr, Ni, Zn) and nutrients from a tool factory in Argentina. Water, sediment and macrophytes were sampled in the inlet and outlet area of the constructed wetland during three years. Three successive phases of vegetation dominance were developed and three different patterns of contaminant retention were observed. During the Eichhornia crassipes dominance, contaminants were retained in the macrophyte biomass; during the E. crassipes + Typha domingensis stage, contaminants were retained in the sediment and in the T. domingensis dominance stage, contaminants were retained in sediment and in the macrophyte biomass. Removal efficiency was not significantly different among the three vegetation stages, except for NH4+ and i-Pdiss. Because of its highest tolerance, T. domingensis is the best choice to treat wastewater of high pH and conductivity with heavy metals, a common result from many industrial processes.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Environmental Management - Volume 90, Issue 1, January 2009, Pages 355–363
نویسندگان
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