Kinetics analysis of leaching phosphorus from rice husk ash assisted by ultrasound. Issue 7 (3rd May 2017)

• Record Type: Journal Article
• Authors: Wang, Jingqiang; Zhuang, Xinpeng; Kong, Jian; Liu, Yang; Du, Xinghong; Luo, Xuetao; Xing, Pengfei
• Is Part Of: Separation science and technology. Volume 52:Issue 7(2017)
• Page Start: 1265
• Page End: 1274
• Publication Date: 2017-05-03
• Subjects: Leaching -- purification -- rice husk ash -- reaction kinetics -- ultrasound-assisted; Separation (Technology) -- Periodicals; 660.284205
• DOI: 10.1080/01496395.2017.1287198
• Languages: English
• ISSNs: 0149-6395

Abstract

ABSTRACT: The distribution state and occurrence form of impurities of rice husk ash were analyzed and identified by SEM/EDS and XRD. The reaction kinetics for the leaching phosphorus have been studied to determine the effect of process parameters, such as stirring speeds, temperatures, HCl concentrations, particle sizes, ultrasound powers and frequencies. The kinetic data fit a new transformation of shrinking core model. The apparent activation energy is 81.21 kJ/mol. And the reaction orders with reference to HCl concentrations, particle sizes, ultrasound powers and frequencies are determined to be 2.54, −0.59, 1.55 and −0.92, respectively. The semi-empirical equation is as follows: