Producing sawdust derived activated carbon by co-calcinations with limestone for enhanced Acid Orange II adsorption. (1st December 2017)

• Record Type: Journal Article
• Authors: Kong, Lingjun; Su, Minhua; Peng, Yan; Hou, Li'an; Liu, Juan; Li, Haipeng; Diao, Zenghui; Shih, Kaimin; Xiong, Ya; Chen, Diyun
• Is Part Of: Journal of cleaner production. Volume 168(2017)
• Page Start: 22
• Page End: 29
• Publication Date: 2017-12-01
• Subjects: Activated carbon -- Waste sawdust -- Limestone calcinations -- CO2 activation -- Acid Orange II; Factory and trade waste -- Management -- Periodicals; Manufactures -- Environmental aspects -- Periodicals; Déchets industriels -- Gestion -- Périodiques; Usines -- Aspect de l'environnement -- Périodiques; 628.5
• DOI: 10.1016/j.jclepro.2017.09.005
• Languages: English
• ISSNs: 0959-6526

Abstract

Abstract: Because of the widespread application of activated carbon (AC) as adsorbents, reduced production costs are highly desirable, therefore, inexpensive alternatives for activated carbon precursors and eco-procedures are presently sought. In this work, AC was successfully prepared from sawdust through co-calcinations with limestone. The surface area and porosity of the resulting ACs were evaluated according to the N2 adsorption at 77 K. Acid Orange II (AOII) was utilized as a negative dye to study the potential of the resulting AC as an adsorbent. Results revealed that the surface area and total pore volume were both increased greatly. When the activated carbon was prepared in mass ratios of 1:2 and 1:1 (calcium carbonate to sawdust), the surface area increased to 611.4 and 706.9 m 2 /g, respectively, and the adsorption capacities increased to 310.89 and 389 mg/g. These enhancements indicated efficient activation, resulting in energy-saving and environmentally friendly activated carbon production. Thus, this paper provides a cleaner process for producing activated carbon from waste sawdust through bioresource recycling. Highlights: Producing AC during limestone co-calcinations. Biomass waste and residual energy reutilization resulted in a cleaner process. Effluent CO2 surface activation contributed to the fabrication of micropores. Pseudo-second order model fitted well with the adsorption kinetic to AO7. Langmuir model fitted well with the isotherm adsorption to AO7.