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Mechanisms of CPB Modified Zeolite on Mercury Adsorption in Simulated Wastewater
Author(s) -
Liu Jiang,
Huang Hui,
Huang Rong,
Zhang Jinzhong,
Hao Shuoshuo,
Shen Yuanyuan,
Chen Hong
Publication year - 2016
Publication title -
water environment research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.356
H-Index - 73
eISSN - 1554-7531
pISSN - 1061-4303
DOI - 10.2175/106143016x14504669767850
Subject(s) - adsorption , zeolite , chemistry , mercury (programming language) , scanning electron microscope , wastewater , zeta potential , fourier transform infrared spectroscopy , ion exchange , activated carbon , powdered activated carbon treatment , inorganic chemistry , nuclear chemistry , chemical engineering , catalysis , ion , organic chemistry , waste management , materials science , computer science , nanoparticle , engineering , composite material , programming language
A systematic study was carried out to analyze the effects of mercury(II) adsorption by surface modified zeolite (SMZ) and adsorption mechanism. Cetylpyridinium bromide (CPB) was used to prepare SMZ. The characterization methods by means of powder X‐ray diffraction (XRD), Fourier transform infrared (FT‐IR), scanning electron microscope (SEM) showed that both the surface and internal zeolite were covered with CPB molecules, but the main binding sites were surface. Results showed that the organic carbon and cation exchange capacity of the SMZ were 7.76 times and 4.22 times higher than those of natural zeolite (NZ), respectively. Zeta potentials before and after modification were measured at −7.80 mV and −30.27 mV, respectively. Moreover, the saturation adsorptive capacity of SMZ was 16.35 times higher than NZ in mercury‐containing wastewater. The possible mechanisms of mercury elimination were surface adsorption, hydrophobic interaction, ion exchange, electricity neutralization. The adsorption process was affected little by competitive ions.