Details

Autor(en) / Beteiligte

• Wang, Ming
• Yan, Jinlong
• Xu, Yumeng
• Zhou, Xiangqian
• Diao, Yusen
• Wang, Hui
• Bian, Jiahao
• Liu, Cheng
• Quan, Guixiang

Titel

Mechanochemical modified nitrogen-rich biochar derived from shrimp shell: Dominant mechanism in pyridinic-N for aquatic methylene blue removal

Ist Teil von

• Journal of environmental management, 2023-03, Vol.329, p.117049-117049, Article 117049

Ort / Verlag

England: Elsevier Ltd

Erscheinungsjahr

2023

Quelle

MEDLINE

Beschreibungen/Notizen

• N-doping for the preparation of functional carbon materials is a trending research topic. In this study, N-rich biochar (BC) was prepared by calcining naturally N rich shrimp shells under oxygen-limiting environment, and the calcining temperatures were controlled. BC were activated with 5% hydrochloric acid solutions and then post-modified with ball-milling to obtain a series of novel adsorbents (MBCs). All samples were characterized by SEM, BET, FT-IR, XRD, XPS, TG, and element analysis. Surface area, pore volume, and other surface functional groups were significantly improved after acidizing and ball-milling. The adsorption capacities for MB were MBC350 > MBC500 > MBC650 >BC350 > BC650 > BC500, and the equilibrium adsorption capacities were 575.01 mg/g, 506.52 mg/g, 424.59 mg/g, 113.31 mg/g, 93.53 mg/g and 86.25 mg/g, respectively. The excellent adsorption performance of MBCs for MB was ascribed to Lewis acid-base interaction, π-π interaction, electrostatic interaction and van der Waals, and the quinone group and pyridinic-N on the surface of the MBCs are identified as the major active sites. Taken together, ball-milled shrimp shell biochar is a promising material for cation dye adsorption. [Display omitted] •N-rich biochar was prepared by Shrimp shell with natural sources of nitrogen.•Biochar pyrolysis at 350 °C (BC350) possess highest pyridinic-N of all samples.•Ball-milled biochar (MBC350) exhibited fast removal rate (99.0%) in initial 15 min.•Lewis acid-base interaction and π-π interaction constitute the main sorption force.