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논문 기본 정보

자료유형
학술저널
저자정보
Endashaw Workie Yihunu (Tongji University) Haiyan Yu (Shanghai Institute of Pollution Control and Ecological Security) Wen Junhe (Shanghai Institute of Pollution Control and Ecological Security) Zhang Kai (Tongji University) Zebene Lakew Teffera (Tongji University) Brhane Weldegebrial (Tongji University) Ma Limin (Tongji University)
저널정보
대한환경공학회 Environmental Engineering Research Environmental Engineering Research 제25권 제3호
발행연도
2020.6
수록면
384 - 392 (9page)

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초록· 키워드

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The presence of high fluoride concentration (> 1.5 mg/L) in water causes serious health problems such as fluorosis, infertility, brain damage, etc., which are endemic to many places in the world. This study has investigated the fluoride removal capacity of the novel activated biochar (BTS) and hydrochar (HTS) using Teff (Eragrostis tef) straw as a precursor. Activated biochar with mesoporous structures and large specific surface area of 627.7 ㎡/g were prepared via pyrolysis process. Low-cost carbonaceous hydrochar were also synthesized by an acid assisted hydrothermal carbonization process. Results obtained from both adsorbents show that the best local maximum fluoride removal was achieved at pH 2, contact time 120 min and agitation speed 200 rpm. The thermodynamic studies proved that the adsorption process was spontaneous and exothermic in nature. Both adsorbents equilibrium data fitted to Langmuir isotherm. However, Freundlich isotherm fitted best for BTS. The maximum fluoride loading capacity of BTS and HTS was found to be 212 and 88.7 mg/g, respectively. The variation could primarily be attributed to a relatively larger Surface area for BTS. Hence, to treat fluoride contaminated water, BTS can be promising as an effective adsorbent.

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ABSTRACT
1. Introduction
2. Materials and Methods
3. Results and Discussion
4. Conclusions
References

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