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Adsorption and desorption characteristics of arsenic onto ceria nanoparticles
Feng QZ(冯钦忠); Zhang ZY(张智勇); Ma YH(马宇辉); Feng, QZ; Zhang, ZY; Ma, YH; He, X; Zhao, YL; Chai, ZF; He X(何潇); Zhao YL(赵宇亮); Chai ZF(柴之芳)
AbstractThe rapid increase in the use of engineered nanoparticles [ENPs] has resulted in an increasing concern over the potential impacts of ENPs on the environmental and human health. ENPs tend to adsorb a large variety of toxic chemicals when they are emitted into the environment, which may enhance the toxicity of ENPs and/or adsorbed chemicals. The study was aimed to investigate the adsorption and desorption behaviors of arsenic on ceria NPs in aqueous solution using batch technique. Results show that the adsorption behavior of arsenic on ceria NPs was strongly dependent on pH and independent of ionic strength, indicating that the electrostatic effect on the adsorption of these elements was relatively not important compared to surface chemical reactions. The adsorption isotherms fitted very well to both the Langmuir and Freundlich models. The thermodynamic parameters (Delta H (0) , Delta S (0) , and Delta G (0) ) for the adsorption of arsenic were determined at three different temperatures of 283, 303, and 323 K. The adsorption reaction was endothermic, and the process of adsorption was favored at high temperature. The desorption data showed that desorption hysteresis occurred at the initial concentration studied. High adsorption capacity of arsenic on ceria NPs suggests that the synergistic effects of ceria NPs and arsenic on the environmental systems may exist when they are released into the environment.
Keywordceria nanoparticles arsenic adsorption desorption
Subject AreaScience & Technology - Other Topics; Materials Science; Physics
Indexed BySCI ; ADS
WOS IDWOS:000301191400001
ADS Bibcode2012NRL.....7...84F
ADS URLhttps://ui.adsabs.harvard.edu/abs/2012NRL.....7...84F
ADS CITATIONShttps://ui.adsabs.harvard.edu/abs/2012NRL.....7...84F/citations
Citation statistics
Cited Times:9 [ADS]
Document Type期刊论文
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GB/T 7714
Feng QZ,Zhang ZY,Ma YH,et al. Adsorption and desorption characteristics of arsenic onto ceria nanoparticles[J]. NANOSCALE RESEARCH LETTERS,2012,7:1-8.
APA 冯钦忠.,张智勇.,马宇辉.,Feng, QZ.,Zhang, ZY.,...&柴之芳.(2012).Adsorption and desorption characteristics of arsenic onto ceria nanoparticles.NANOSCALE RESEARCH LETTERS,7,1-8.
MLA 冯钦忠,et al."Adsorption and desorption characteristics of arsenic onto ceria nanoparticles".NANOSCALE RESEARCH LETTERS 7(2012):1-8.
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