期刊
JOURNAL OF HAZARDOUS MATERIALS
卷 403, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.jhazmat.2020.123532
关键词
Magnetic sawdust; Diclofenac; Ecotoxicity; Biosorption; Zebra fish
资金
- Indian Institute of Technology Guwahati, India [BSBESUGIITG01213xSEN001]
- Science & Engineering Research Board, DST [PDF/2019/001708]
In this study, magnetic sawdust (MSD) was prepared for biosorptive removal of DCF from water and characterized using various analytical techniques. Ecotoxicological assessment showed adverse effects of DCF on plant seeds, microbes, and zebra fish, while a significant increase in DCF concentration after biosorption was observed.
Diclofenac (DCF), a persistent pharmaceutical micropollutant which occurs in the ecosystems causing adverse effects on aquatic as well as terrestrial organisms. In this study, magnetic sawdust (MSD) was prepared using co precipitation method for biosorptive removal of DCF from water. The MSD was characterized using various analytical techniques like microscopic and spectroscopic analysis. Magnetometer study confirms the ferromagnetic behavior of the biosorbent which is a key advantage in the separation of MSD after biosorption. The effect of experimental parameters was optimized in batch mode with evaluated maximum efficiency of 86.12 % at pH 6, biosorbent dosage 25 mg for 50 mg/L of DCF. Ecotoxicological assessment has been performed for the treated and untreated sample using plant seeds, microbes and zebra fish to check the adverse effects of DCF on these organisms. Evaluation of toxicity studies revealed that inhibition concentration of DCF for various seeds (60.91 mg/L to 43.11 mg/L), E. coli (48.82 mu g/mL) and B. subtilis (31.55 mu g/mL). The lethal concentration of DCF on the Danio rerio was found to be 156.99 mg/L. In contrast, significant increase in both the concentration measures of DCF after biosorption was observed making this biosorbent a potent alternative to other available treatment measures.
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