Mercury (II) ion adsorption performance of Cl-loaded carbonaceous material prepared by chlorination of pyrolyzed rice husk char. (10th July 2021)

• Record Type: Journal Article
• Authors: Mochizuki, Yuuki; Bud, Javzandolgor; Liu, Jiaqian; Takahashi, Miki; Tsubouchi, Naoto
• Is Part Of: Journal of cleaner production. Volume 305(2021)
• Publication Date: 2021-07-10
• Subjects: Rice husk -- Mercury -- Adsorption -- Chlorination -- Chlorine -- Carbon; 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.2021.127176
• Languages: English
• ISSNs: 0959-6526

Abstract

Abstract: The objective of this study was to elucidate in detail the Hg adsorption performance of Cl-loaded carbons obtained after chlorination of rice husk char (RC). Firstly, chlorine content/morphology/porosity of Cl-loaded carbons prepared were investigated. Subsequently, Hg adsorption performance of Cl-loaded carbon was tested. The effect of Cl on Hg adsorption was then investigated by comparing the adsorption performance of Cl-loaded carbons prepared from RC and demineralized RC (DRC). Cl content of RC and DRC reached a maximum value at 600 °C, and then decreased by 1000 °C. The pore properties of RC chlorinated residue increased with increasing chlorination temperature. The Hg adsorption performance of the RC chlorinated residues increased with increasing chlorination temperature. The maximum Hg adsorption capacity of RC chlorinated residue obtained at 1000 °C, 10min reached 620 mg/g; the capacity of chlorinated residue treated with DRC at 1000 °C, 10min was larger than that of DRC chlorinated at 600 °C, which is largest Cl content. The adsorption kinetics and isotherm could be expressed by pseudo-first-order and Langmuir equations, respectively. The comparison of the porosity and Hg adsorption of DRC and RC chlorinated residue obtained at 1000 °C, 10min indicated that Cl-adsorbed on the carbon in RC during chlorination may also be involved in Hg adsorption.