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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2023.12
- 수록면
- 320 - 334 (15page)
이용수
초록· 키워드
오류제보하기
The formation of valuable ferrite in one step by adding ferrous sulfate to chromium-containing wastewater without adjusting to acidic conditions was studied under simple mechanical equipment. The process can not only solve the problem of heavy metals removal from wastewater, but also achieve the purpose of chromium resource recovery. Increasing temperature and pH can further promote the formation of chromium ferrite while prolonging the reaction time has no significant effect on the product’s performance. The response surface method (RSM) was utilized to optimize the process of ferrite formation: the Fe<SUP>2+</SUP>/Cr<SUP>6+</SUP> mole ratio of 7, pH value of 10.5, and temperature of 100℃, on which formed ferrite has a high saturation magnetization of 41.28 emu/g with Cr(VI) removal ratio around 100%. TCLP (Toxicity Characteristic Leaching Procedure) tests showed that the chromium concentrations leached from the solid were below the limit of 5 mg/L by USEPA. The molecular formula of chromium ferrite can be expressed as Fe<SUB>3-x</SUB>Cr<SUB>x</SUB>O₄ (where x is about 0.45), which has the potential to be recycled as a favorable material. The ferrite process has a low activation energy of 20.8 kJ/mol, which is an economical and environmentally friendly method for synthesizing ferrite from wastewater.
목차
ABSTRACT
1. Introduction
2. Materials and Methods
3. Results and Discussion
4. Conclusion
References
참고문헌 (79)
참고문헌 신청
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Vaiopoulou E, Gikas P. Regulations for chromium emissions to the aquatic environment in Europe and elsewhere. Chemosphere 2020;254:126876. https://doi.org/10.1016/j.chemosphere.2020.126876.
Kotaś J, Stasicka ZJ. Chromium occurrence in the environment and methods of its speciation. Environ. Pollut. 2000;107:263-283. https://doi.org/10.1016/S0269-7491(99)00168-2.
Xie YQ, Lin J, Liang J et al. Hypercrosslinked mesoporous poly (ionic liquid)s with high density of ion pairs: Efficient adsorbents for Cr(VI) removal via ion-exchange. Chem. Eng. J. 2019;378. https://ARTN12210710.1016/j.cej.2019.122107.
EPA, Office of Water, Office of ScienceTechnology. National recommended water quality criteria. 2009. Available from: https://www.epa.gov/ground-water-and-drinking-water.
Vaiopoulou E, Gikas P. Regulations for chromium emissions to the aquatic environment in Europe and elsewhere. Chemosphere 2020;254:126876. https://doi.org/10.1016/j.chemosphere.2020.126876.
Kotaś J, Stasicka ZJ. Chromium occurrence in the environment and methods of its speciation. Environ. Pollut. 2000;107:263-283. https://doi.org/10.1016/S0269-7491(99)00168-2.
Xie YQ, Lin J, Liang J et al. Hypercrosslinked mesoporous poly (ionic liquid)s with high density of ion pairs: Efficient adsorbents for Cr(VI) removal via ion-exchange. Chem. Eng. J. 2019;378. https://ARTN12210710.1016/j.cej.2019.122107.
EPA, Office of Water, Office of ScienceTechnology. National recommended water quality criteria. 2009. Available from: https://www.epa.gov/ground-water-and-drinking-water.
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