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Effects of metal cations on sorption-desorption of p-nitrophenol onto wheat ash
Wang, YS; Pei, ZG; Shan, XQ; Chen, GC; Zhang, J; Xie, YN; Zheng, LR; Zhang J(张静); Xie YN(谢亚宁); Zheng LR(郑黎荣)
2011
Source PublicationJOURNAL OF ENVIRONMENTAL SCIENCES-CHINA
Volume23Issue:1Pages:#REF!
Corresponding AuthorShan, XQ (reprint author), Ecoenvironm Sci Res Ctr, State Key Lab Environm Chem & Ecotoxicol, Beijing 100085, Peoples R China.
SubtypeArticle
AbstractThe mutual effects of metal cations (Cu(2+), Pb(2+), Zn(2+), and Cd(2+)) and p-nitrophenol (NP) on their adsorption desorption behavior onto wheat ash were studied. Results suggested that Cu(2+), Pb(2+), and Zn(2+) diminished the adsorption and increased the desorption of NP remarkably, while Cd(2+) had no such effect. In contrast, NP diminished the adsorption of Cu(2+), Pb(2+), and Zn(2+) onto ash, however, this suppression effect depended on the initial concentrations of metal cations. NP had no effect on Cd2+ adsorption on ash. Fourier transform infrared (FT-IR) and X-ray absorption spectroscopic (XAS) studies suggested the following mechanisms responsible for the metal suppression effect on NP adsorption: (1) large hydrated Cu(2+), Pb(2+), and Zn(2+) shells occupied the surface of ash and prevent nonspecific adsorption of NP onto ash surface; (2) Cu(2+), Pb(2+), and Zn(2+) may block the micropores of ash, resulting in decreased adsorption of NP; (3) complexation of Cu(2+), Pb(2+), and Zn(2+) was likely via carboxyl, hydroxylic and phenolic groups of wheat ash and these same groups may also react with NP during adsorption. As a "soft acid", Cd(2+) is less efficient in the complexation of oxygen-containing acid groups than Cu(2+), Pb(2+), and Zn(2+). Thus, Cd(2+) had no effect on the adsorption of NP on wheat ash.
Keywordmetal cations p-nitrophenol adsorption desorption wheat ash FT-IR XAS
Subject AreaEnvironmental Sciences & Ecology
DOI10.1016/S1001-0742(10)60381-6
Indexed BySCI
WOS SubjectEnvironmental Sciences
WOS IDWOS:000286571500016
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Document Type期刊论文
Identifierhttp://ir.ihep.ac.cn/handle/311005/226233
Collection多学科研究中心
Recommended Citation
GB/T 7714
Wang, YS,Pei, ZG,Shan, XQ,et al. Effects of metal cations on sorption-desorption of p-nitrophenol onto wheat ash[J]. JOURNAL OF ENVIRONMENTAL SCIENCES-CHINA,2011,23(1):#REF!.
APA Wang, YS.,Pei, ZG.,Shan, XQ.,Chen, GC.,Zhang, J.,...&郑黎荣.(2011).Effects of metal cations on sorption-desorption of p-nitrophenol onto wheat ash.JOURNAL OF ENVIRONMENTAL SCIENCES-CHINA,23(1),#REF!.
MLA Wang, YS,et al."Effects of metal cations on sorption-desorption of p-nitrophenol onto wheat ash".JOURNAL OF ENVIRONMENTAL SCIENCES-CHINA 23.1(2011):#REF!.
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