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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2021.12
- 수록면
- 45 - 58 (14page)
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초록· 키워드
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As(III) presence in low concentration (1-5 mg/L) in water presents a challenging problem in its removal. In the present study, biochar prepared by the pyrolysis of mustard cake and loaded with Fe-Mn binary oxides through hydrothermal technique was used for adsorptive removal of As(III) from water in batch and continuous modes. The synthesised biochar exhibited mesoporous structures in the range of 2-50 nm (based on BET analysis). The maximum adsorption capacity (95.7 mg/g) obtained using biochar loaded with both Fe-Mn oxides was found to be 1.4 times higher than that of pristine biochar. The adsorption equilibria was best described by Freundlich isotherm (based on R² and χ²) suggesting that the As(III) adsorption was multilayered. The external mass transfer coefficients (β<SUB>L</SUB> = 10<SUP>-5</SUP> cm²/s) were observed to be higher than the film (D<SUB>f</SUB> = 10<SUP>-7</SUP> – 10<SUP>-9</SUP> cm²/s) and intraparticle (D<SUB>i</SUB> = 10<SUP>-9</SUP> cm²/s) diffusivities in batch mode. In column studies, Thomas model gave the best correlation coefficient (R² > 0.95) and the adsorption was limited by external mass transfer. Kinetic rate constant decreased with increase in initial As(III) concentration and flow rate. The oxide loaded biochar exhibited reusability up to three times for As(III) removal.
목차
ABSTRACT
1. Introduction
2. Materials and Methods
3. Results and Discussions
4. Conclusions
References
참고문헌 (64)
참고문헌 신청
Guan X, Du J, Meng X, Sun Y, Sun B, Hu Q. Application of titanium dioxide in arsenic removal from water: A review. J. Hazard. Mater. 2012;215:1-16.
Smedley PL, Kinniburgh DG. A review of the source, behaviour and distribution of arsenic in natural waters. Appl. Geochem. 2002;17:517-568.
Qi J, Zhang G, Li H. Efficient removal of arsenic from water using a granular adsorbent: Fe-Mn binary oxide impregnated chitosan bead. Bioresour. Technol. 2015;193:243-249.
Li Y, Han Y, Li W, Li Y, Zhang D, Lan Y. Efficient removal of As(III) via simultaneous oxidation and adsorption by magnetic sulfur-doped Fe-Cu-Y trimetal oxide nanoparticles. Environ. Res. 2020;180:108896.
Chakraborti D, Singh SK, Rahman MM, Dutta RN, Mukherjee SC, Pati S, Kar PB. Groundwater arsenic contamination in the ganga river basin: A future health danger. Int. J. Environ. Res. Public Health. 2018;15:180.
Smedley PL, Kinniburgh DG. A review of the source, behaviour and distribution of arsenic in natural waters. Appl. Geochem. 2002;17:517-568.
Qi J, Zhang G, Li H. Efficient removal of arsenic from water using a granular adsorbent: Fe-Mn binary oxide impregnated chitosan bead. Bioresour. Technol. 2015;193:243-249.
Li Y, Han Y, Li W, Li Y, Zhang D, Lan Y. Efficient removal of As(III) via simultaneous oxidation and adsorption by magnetic sulfur-doped Fe-Cu-Y trimetal oxide nanoparticles. Environ. Res. 2020;180:108896.
Chakraborti D, Singh SK, Rahman MM, Dutta RN, Mukherjee SC, Pati S, Kar PB. Groundwater arsenic contamination in the ganga river basin: A future health danger. Int. J. Environ. Res. Public Health. 2018;15:180.
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UCI(KEPA) : I410-ECN-0101-2021-539-001423136