期刊
WATER ENVIRONMENT RESEARCH
卷 93, 期 9, 页码 1543-1553出版社
WILEY
DOI: 10.1002/wer.1536
关键词
biodegradation; biological treatment; industrial waste; remediation; wastewater treatment
资金
- GeoBioTec Research Centre [UID/GEO/04035/2019]
This study demonstrates the phytoremediation performance of water lettuce in removing physicochemical pollutants from paper mill effluent, with the best results observed at the 75% treatment level. Additionally, the highest production of chlorophyll, plant biomass, and growth rate were also recorded under the 75% treatment condition.
The present study describes the phytoremediation performance of water lettuce (Pistia stratiotes L.) for physicochemical pollutants elimination from paper mill effluent (PME). For this, pot (glass aquarium) experiments were conducted using 0% (BWW: borewell water), 25%, 50%, 75%, and 100% treatments of PME under natural day/light regime. Results of the experiments showed that the highest removal of pH (10.75%), electrical conductivity (EC: 63.82%), total dissolved solids (TDS: 71.20%) biological oxygen demand (BOD: 85.03%), chemical oxygen demand (COD: 80.46%), total Kjeldahl's nitrogen (TKN: 93.03%), phosphorus (P: 85.56%), sodium (Na: 91.89%), potassium (K: 84.04%), calcium (Ca: 84.75%), and magnesium (Mg: 83.62%), most probable number (MPN: 77.63%), and standard plate count (SPC: 74.43%) was noted in 75% treatment of PME after treatment by P. stratiotes. PCA showed the best vector length for TKN, Na, and Ca. The maximum plant growth parameters including, total fresh biomass (81.30 +/- 0.28 g), chlorophyll content (3.67 +/- 0.05 mg g(-1) f.wt), and relative growth rate (0.0051 gg(-1) d(-1)) was also measured in 75% PME treatment after phytoremediation experiments. The findings of this study make useful insight into the biological management of PME through plant-based pollutant eradication while leftover biomass may be used as a feedstock for low-cost bioenergy production. Practitioner points Biological treatment of paper mill effluent using water lettuce is presented. Best reduction of physicochemical and microbiological pollutants was attained in 75% treatment. Maximum production of chlorophyll, plant biomass, and highest growth rate was also observed in 75% treatment.
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