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Utilization of ZeroValent Iron (ZVI) Particles Produced fromSteel Industry Waste for In-Situ Remediation ofGroundWaterContaminated withOrgano- Chlorine PesticideHeptachlor | ||
| International Journal of Environmental Research | ||
| مقاله 3، دوره 9، شماره 1، فروردین 2015، صفحه 19-26 اصل مقاله (970.67 K) | ||
| نوع مقاله: Original Research Paper | ||
| شناسه دیجیتال (DOI): 10.22059/ijer.2015.869 | ||
| نویسندگان | ||
| R. Mukherjee؛ A. Sinha* ؛ Y. Lama؛ V. Kumar | ||
| Department of Environmental Science and Engineering, Indian School ofMines, Dhanbad-826004, Jharkhand, India | ||
| چکیده | ||
| Treatment of ground water contaminated with halogenated pesticides is a challenging task. This paper focuses on preparation, characterization and treatment of heptachlor by iron particles synthesized from steel industry waste (S-ZVI). The BOF sludge, which is dumped in landfills, is an iron rich source and was used as the source material for S-ZVI synthesis. The vital step was reducing agent sodium borohydride optimization and a high dose of 3.5g/10mL of dose was required for production of S-ZVI. The average particle size for S-ZVI and after modifying using surfactant PAA (5%) was 1660 nm and 300 nm, respectively. Crystalline structure of S-ZVI and a diverse chemical composition was found with high contents of Na, Ca and Mg. Reduction of heptachlor was studied in batch reactors using S-ZVI, PAA modified S-ZVI, Tween 20 modified S-ZVI and pure ZVI. After 48h, the reduction efficiency of heptachlor, by various forms of ZVI, was found to be 87%, 89%, 75 % and 93% respectively. The observed dechlorination rate constant of Heptachlor by PAA modified S-ZVI was found to be the highest (1.959/hr) followed by Tween 20 modified S-ZVI (1.106 /hr), unmodified S-ZVI (0.526 /hr) and pure ZVI (0.09 /hr). The Surface Area Normalised Rate constant (kSA) were found to be 0.2884 L/hr/m2, 0.1074 L/hr/m2, 0.06606 L/hr/m2 , and 0.000486 L/hr/m2 for S-ZVI, PAA modified S-ZVI, Tween 20 modified S-ZVI, and pure ZVI respectively. | ||
| کلیدواژه‌ها | ||
| Heptachlor؛ ZeroValent Iron (ZVI)؛ BlastOxygen Furnace Sludge؛ surfactant؛ ReductiveDehalogenation | ||
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