Industrial & Engineering Chemistry Research
Industrial & Engineering Chemistry Research
5 years ago

Site Energy Distribution and X-ray Analyses of Nickel Loaded on Heterogeneous Adsorbents

Site Energy Distribution and X-ray Analyses of Nickel Loaded on Heterogeneous Adsorbents
Catherine Hui Niu, Bei Yan, Renfei Feng
The approximate site energy distributions were estimated to describe the adsorption of nickel ions on the heterogeneous surfaces of barley straw adsorbents based on the Langmuir–Freundlich model. The average site energy and standard deviation of the site energy distributions of the adsorbents were determined to analyze the interaction between the adsorbents and adsorbate, and the adsorption site heterogeneity. With higher site energy, the pretreated barley straw (PBS) has higher nickel adsorption capacity (59.5 mg/g) than most of the reported adsorbents. The bonding of nickel on PBS was investigated by X-ray absorption spectroscopies. X-ray absorption near edge structure results indicated that the nickel adsorbed on PBS remained as Ni(II). Extended X-ray absorption fine structure data indicated that the adsorbed Ni was bonded to 6 oxygen atoms of carboxyl groups and/or water molecules. The results and methodology in this work are transferable to investigate other adsorption systems for separation applications.

Publisher URL: http://dx.doi.org/10.1021/acs.iecr.7b01445

DOI: 10.1021/acs.iecr.7b01445

You might also like
Discover & Discuss Important Research

Keeping up-to-date with research can feel impossible, with papers being published faster than you'll ever be able to read them. That's where Researcher comes in: we're simplifying discovery and making important discussions happen. With over 19,000 sources, including peer-reviewed journals, preprints, blogs, universities, podcasts and Live events across 10 research areas, you'll never miss what's important to you. It's like social media, but better. Oh, and we should mention - it's free.

  • Download from Google Play
  • Download from App Store
  • Download from AppInChina

Researcher displays publicly available abstracts and doesn’t host any full article content. If the content is open access, we will direct clicks from the abstracts to the publisher website and display the PDF copy on our platform. Clicks to view the full text will be directed to the publisher website, where only users with subscriptions or access through their institution are able to view the full article.