Title :
Adsorptive Removal of p-chloronitrobenzene (pCNB) by Mesoporous Silica HMS from Aqueous Solution
Author :
Zhang, Dongmei ; Chen, Zhonglin ; Xu, Zhenzhen ; Shen, Jimin
Author_Institution :
State Key Lab. of Urban Water Resource & Environ., Harbin Inst. of Technol., Harbin, China
Abstract :
Adsorption of p-chloronitrobenzene(pCNB) onto mesoporous molecular sieves (HMS) from aqueous solution has been investigated systematically using batch experiments in this study. Results indicate that p-chloronitrobenzene(pCNB) adsorption is initially rapid and the adsorption process reaches a steady state after 1 minute. The adsorption isotherms are well described by the Langmuir and the Freundlich models. The effects of temperature and pH are also examined. According to the experimental results, the amount of pchloronitrobenzene(pCNB) adsorbed decreases with increases of temperature from 288 to 308 K and pH from 2.0 to 11.0. The desorption process shows a reversibility of pchloronitrobenzene adsorption onto HMS. Based on the results, it suggests that the adsorption is primarily brought about by hydrogen bonding between p-chloronitrobenzene and HMS surface.
Keywords :
adsorption; environmental factors; filtration; mesoporous materials; molecular sieves; organic compounds; silicon compounds; water treatment; Freundlich model; HMS; Langmuir model; SiO2; aqueous solution; hexagonal mesoporous silica molecular sieve; hydrogen bonding; mesoporous molecular sieves; p-chloronitrobenzene adsorption; pCNB adsorptive removal; pH effects; temperature 288 K to 308 K; temperature effects; Chemical analysis; Chemical industry; Chemical sensors; Conducting materials; Mesoporous materials; Molecular sieves; Optical materials; Silicon compounds; Temperature; Water resources; Adsorption; Desorption; HMS; Isotherm; p-chloronitrobenzene(pCNB);
Conference_Titel :
Energy and Environment Technology, 2009. ICEET '09. International Conference on
Conference_Location :
Guilin, Guangxi
Print_ISBN :
978-0-7695-3819-8
DOI :
10.1109/ICEET.2009.336
