tA higher demand on textile materials has resulted in an increase of the number of textile factories par-ticularly in the developing world, which consequently negatively effects the environment due to theircontaminated effluents. Textile effluents are highly coloured and mixed with different chemicals andpollutants. Shallow pond systems are a promising, cheap and effective technique for the treatment ofcontaminated wastewater. The aim of this study is to assess the performance of pond systems vege-tated by Lemna minor L. (duckweed) for textile dye removal under controlled laboratory conditions. Thekey objectives of this study are to assess the influence of design variables on water quality parameters,the dye and chemical oxygen demand (COD) removal of dyes, and the effect of dye accumulation as afunction of the relative growth rate of L. minor. Findings indicate that the simulated shallow pond sys-tem (as a polishing step) is able to remove only Basic Red 46 (BR46) in low concentrations, and pondscontaining L. minor significantly (p < 0.05) outperformed algae-dominated ponds and control ponds. Thesimple chemical structure, absence of sulpho-group and small molecular weight associated with neutralpH values enhanced the capacity of the uptake of BR46 molecules. Furthermore, the total dissolved solidconcentrations were within the threshold set for discharge to the aquatic environment
Publication Date
5/27/2016
Publisher
Elsiver
Volume No
Issue No
DOI
http://dx.doi.org/10.1016/j.ecoleng.2016.05.081
Keywords
Colour red Biological treatment Duckweed Colorant removal Textile wastewater Water quality assessment
م. د. دينا علي ياسين | Dr. Dina Ali Yaseen | 3679