title: Effectiveness of Rice Agricultural Waste, Microbes and Wetland Plants in the Removal of Reactive Black-5 Azo Dye in Microcosm Constructed Wetlands.
abstract: Azo dyes are commonly generated as effluent pollutants by dye using industries, causing contamination of surface and ground water. Various strategies are employed to treat such wastewater; however, a multi-faceted treatment strategy could be more effective for complete removal of azo dyes from industrial effluent than any single treatment. In the present study, rice husk material was used as a substratum in two constructed wetlands (CWs) and augmented with microorganisms in the presence of wetland plants to effectively treat dye-polluted water. To evaluate the efficiency of each process the study was divided into three levels, i.e., adsorption of dye onto the substratum, phytoremediation within the CW and then bioremediation along with the previous two processes in the augmented CW. The adsorption process was helpful in removing 50% dye in presence of rice husk while 80% in presence of rice husk biocahr. Augmentation of microorganisms in CW systems has improved dye removal efficiency to 90%. Similarly presence of microorganisms enhanced removal of total nitrogen (68% 0 and Total phosphorus (75%). A significant improvement in plant growth was also observed by measuring plant height, number of leaves and leave area. These findings suggest the use of agricultural waste as part of a CW substratum can provide enhanced removal of textile dyes.
authors: a Department of Food Agricultural and Biological Engineering , The Ohio State University , Columbus , Ohio.
authors: Beenish
authors: B
authors: Saba
authors: Madeeha
authors: M
authors: Jabeen
authors: Azeem
authors: A
authors: Khalid
authors: Irfan
authors: I
authors: Aziz
authors: Ann D
authors: AD
authors: Christy
mesh_terms: D000327:Adsorption; D000383:Agriculture; D001419:Bacteria / Q000378:metabolism*; D001673:Biodegradation, Environmental; D004396:Coloring Agents / Q000378:metabolism*; D002523:Edible Grain / Q000737:chemistry; D005511:Food Handling; D007220:Industrial Waste / Q000032:analysis; D009282:Naphthalenesulfonates / Q000378:metabolism*; D012275:Oryza / Q000737:chemistry*; D010154:Pakistan; D019664:Polygonaceae / Q000378:metabolism*; D013783:Textile Industry; D062065:Wastewater / Q000032:analysis; D014874:Water Pollutants, Chemical / Q000378:metabolism*; D053833:Wetlands
chemical_list: D004396:Coloring Agents; D007220:Industrial Waste; D009282:Naphthalenesulfonates; D062065:Wastewater; D014874:Water Pollutants, Chemical; C063421:Remazol black B
keywords: agricultural waste; constructed wetland; dye degradation; substratum