In situ phytoremediation of dyes from textile wastewater using garden ornamental plants, effect on soil quality and plant growth

• Published in: Chemosphere (Oxford) 2018-11, Vol.210, p.968-976
• Main Authors: Chandanshive, Vishal V., Kadam, Suhas K., Khandare, Rahul V., Kurade, Mayur B., Jeon, Byong-Hun, Jadhav, Jyoti P., Govindwar, Sanjay P.
• Format: Article
• Language: English
• Subjects: Asteraceae - drug effects; Asteraceae - growth & development; Asteraceae - physiology; Biodegradation, Environmental; Coloring Agents - metabolism; Coloring Agents - pharmacology; Gardens; Heavy metals; Metals, Heavy - analysis; Phytoremediation; Plant Development - drug effects; Soil - chemistry; Textile wastewater; Textiles - analysis; Waste Water - chemistry
• ISSN: 0045-6535; 1879-1298
• DOI: 10.1016/j.chemosphere.2018.07.064

In situ phytoremediation of dyes from textile wastewater was carried out in a high rate transpiration system ridges (91.4 m × 1.0 m) cultivated independently with Tagetes patula, Aster amellus, Portulaca grandiflora and Gaillardia grandiflora which reduced American Dye Manufacturers Institute color value by 59, 50, 46 and 73%, respectively within 30 d compared to dye accumulated in unplanted ridges. Significant increase in microbial count and electric conductivity of soil was observed during phytoremediation. Reduction in the contents of macro (N, P, K and C), micro (B, Cu, Fe and Mn) elements and heavy metals (Cd, As, Pb and Cr) was observed in the soil from planted ridges due to phyto-treatment. Root tissues of these plants showed significant increase in the specific activities of oxido-reductive enzymes such as lignin peroxidase, laccase, veratryl alcohol oxidase, tyrosinase and azo reductase during decolorization of textile dyes from soil. Anatomical studies of plants roots revealed the occurrence of textile dyes in tissues and subsequent degradation. A minor decrease in plant growth was also observed. Overall surveillance suggests that the use of garden ornamental plants on the ridges of constructed wetland for the treatment of dyes from wastewater along with the consortia of soil microbial flora is a wise and aesthetically pleasant strategy. [Display omitted] •Ornamental plants at wetland ridges accumulated and degraded dyes from soil.•Synergism between plants and microbes was involved in effective dye removal.•Study revealed the entry and degradation of textile dyes in roots.•Phytoremediation did not cause any severe toxicity on studied plants.•The proposed treatment method was found to be aesthetically pleasant.