콘텐츠 본문
논문 해외 국제전문학술지(SCI급) Effect of water washing pretreatment on property and adsorption capacity of macroalgae-derived biochar
- 학술지 구분 국제전문학술지(SCI급)
- 게재년월 2019-03
- 저자명 우승한,PATRICK BOAKYE,Tran, HN (Hai Nguyen Tran),Lee, DS (Lee, Dae Sung)
- 학술지명 JOURNAL OF ENVIRONMENTAL MANAGEMENT
- 발행처명 ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
- 발행국가 해외
- 논문언어 외국어
- 전체저자수 4
논문 초록 (Abstract)
The effects of water washing pretreatment process on the property and adsorption capacity of biochar were investigated at different biochar/water ratios from 1:5 to 1:100 (w/v). Saccharine japonica macroalgae-derived biochars (B300, B450, and B600) were prepared at 300 degrees C, 450 degrees C, and 600 degrees C, respectively. The optimal biochar/water ratio was obtained at 1:10. The results indicated that the washing pretreatment can contribute to dramatically increasing the specific surface area of biochars, but slightly increasing their porosity. The washed biochars were carbonaceous microporous materials (67-80% micropore volume), with their specific surface area and porosity being B600 (543 m(2)/g and 86%), B450 (521 m(2)/g and 75%), and B300 (188 m(2)/g and 80%), respectively. The unwashed biochars exhibited a significantly higher ash content (59%-65%) than washed biochars (26%-35%). Equilibrium adsorption study demonstrated that the Langmuir maximum adsorption capacity (Q(max)(o)) of crystal violet cationic dye decreased in the following order: unwashed-B450 (1719 mg/g) > washed-B450 (1277 mg/g) > commercial activated carbon (492 mg/g). The washing pretreatment can remove solute-inorganic minerals to prevent their release from biochar during the dye adsorption. The washed biochar with its excellent adsorption capacity can serve as a highly sustainable and industrially viable adsorbent for the removal of cationic dyes from waste bodies.
