Vermiremediation of heavy metals in wastewater sludge from paper and pulp industry using earthworm Eisenia fetida.
作者： Surindra Suthar , Poonam Sajwan , Kapil Kumar
DOI: 10.1016/J.ECOENV.2014.07.030
关键词: Wastewater 、 Bioremediation 、 Cow dung 、 Paper mill 、 Chemistry 、 Earthworm 、 Eisenia fetida 、 Bioaccumulation 、 Environmental chemistry 、 Vermicompost
摘要: Abstract This work presents the results of removing heavy metals from paper mill wastewater (PMS) sludge spiked with cow dung (CD) employing Eisenia fetida. A total seven set-ups were prepared: CD (100 percent), PMS: (1:3), PMS:CD (1:2), (1:1), PMS (3:1) and (2:1) changes in chemical parameters observed for 60 days. Vermistabilization caused significant decrease level Cd (32–37 Cr (47.3–80.9 Cu (68.8–88.4 Pb (95.3–97.5 percent) substantial increase EC, total-N, available P K at end. At end, tissues inoculated worms showed high load (mg kg−1, dry biomass) (8.81–9.69), (2.31–2.71), (20.7–35.9) (9.94–11.6), respectively which indicated bioaccumulation by worms. The (2:1 and/or 3:1) appeared to be suitable waste mixture terms metal removal earthworm growth rates. Bioaccumulation, as quantified using BCF, was order: Cd>Cr>Pb>Cu. Results suggested vermiremediation appropriate technology bioremediation PMS.
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