Ahn, Yongtae Cho, Dong-Wan WALEED, AHMAD JO, JUNGMAN Jurng, Jongsoo Kurade, Mayur B. Jeon, Byong-Hun Choi, Jae Young 2024-01-19T13:30:35Z 2024-01-19T13:30:35Z 2022-01-25 2021-11-15 0301-4797 https://pubs.kist.re.kr/handle/201004/116124 A novel metal-biochar (Biochar/AMDS) composite were fabricated by co-pyrolysis of spent coffee waste (SCW)/ acid mine drainage sludge (AMDS), and their effective application in adsorptive removal of air pollutants such as formaldehyde in indoor environments was evaluated. The physicochemical characteristics of Biochar/AMDS were analyzed using SEM/EDS, XRF, XRD, BET, and FTIR. The characterization results illustrated that Biochar/ AMDS had the highly porous structure, carbonaceous layers, and heterogeneous Fe phases (hematite, metallic Fe, and magnetite). The fixed-bed column test showed that the removal of formaldehyde by Biochar/AMDS was 18.4-fold higher than that by metal-free biochar (i.e., SCW-derived biochar). Changing the ratio of AMDS from 1:6 to 1:1 significantly increased the adsorption capacity for formaldehyde from 1008 to 1811 mg/g. In addition, thermal treatment of used adsorbent at 100 degrees C effectively restored the adsorptive function exhausted during the column test. These results provide new insights into the fabrication of practical, low-cost and ecofriendly sorbent for formaldehyde. English Academic Press Efficient removal of formaldehyde using metal-biochar derived from acid mine drainage sludge and spent coffee waste Article 10.1016/j.jenvman.2021.113468 1 Journal of Environmental Management, v.298 Journal of Environmental Management 298 Y scie scopus 000697021300004 2-s2.0-85112387877 Environmental Sciences Environmental Sciences & Ecology Article ACTIVATED CARBON DESORPTION PERFORMANCE ADSORPTION CAPACITY PREDICTION CATALYSTS RED BED Spent coffee waste Metal biochar Acid mine drainage sludge Formaldehyde Adsorption Fixed column test