Journal
JOURNAL OF ENVIRONMENTAL MANAGEMENT
Volume 236, Issue -, Pages 93-99Publisher
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jenvman.2019.01.109
Keywords
Tetracycline removal; Binary nanoparticles; In-situ NiFe nanoparticles coated sand (IS-NiFe); Mathematical models; Spiked natural water
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Funding
- Department of Science and Technology-Science and Engineering Research Board (DST-SERB), Government of India [EMR/2016/004816]
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The occurrence of various antibiotics in natural waters poses art emerging environmental concern. Tetracycline (TC) is a frequently used antibiotic in human therapy, veterinary industry, and agricultural sectors. In the current study, TC removal from aqueous solutions was studied using binary Nickel/nano zero valent iron particles (NiFe nano particles) and in-situ NiFe nanoparticles coated sand (IS-NiFe). Removal of TC using bimetallic NiFe particles was optimized with help of response surface methodology (RSM). Using the optimized parameters (concentration of TC: 20 mg/L; NiFe dose: 120 mg/L; time of interaction: 90 min), 99.43 +/- 0.98% removal of TC was noted. Further, IS-NiFe was packed in the column reactors and effects of different parameters like flow rate (1-3 mL/min), bed height (3-10 cm) and inlet TC concentration (20-60 mg/L) on breakthrough characteristics were examined. Under the optimized conditions the removal capacity in the column reactor was 1198 40.2 mg/g using IS-NiFe. The column kinetic data were successfully fitted with Adams- Bohart and Thomas models. TC removal efficiency of IS-NiFe in column reactors was tested with TC (20 mg/L) spiked lake water, ground water, and tap water and the removal capacity was noted to be 698.55 +/- 11.21, 764.17 +/- 6.78, and 801.7 +/- 13.26 mg/g respectively.
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