Adsorption and co-adsorption of graphene oxide and Ni(II) on iron oxides: A spectroscopic and microscopic investigation

Guodong Sheng; Chengcai Huang; Guohe Chen; Jiang Sheng; Xuemei Ren; Baowei Hu; Jingyuan Ma; Xiangke Wang; Yuying Huang; Ahmed Alsaedi; Tasawar Hayat

doi:10.1016/j.envpol.2017.10.047

Adsorption and co-adsorption of graphene oxide and Ni(II) on iron oxides: A spectroscopic and microscopic investigation

Environ Pollut. 2018 Feb:233:125-131. doi: 10.1016/j.envpol.2017.10.047. Epub 2017 Oct 20.

Authors

Guodong Sheng¹, Chengcai Huang², Guohe Chen², Jiang Sheng³, Xuemei Ren⁴, Baowei Hu⁵, Jingyuan Ma⁶, Xiangke Wang⁷, Yuying Huang⁶, Ahmed Alsaedi⁸, Tasawar Hayat⁹

Affiliations

¹ School of Environment and Chemical Engineering, North China Electric Power University, Beijing 102206, PR China; College of Chemistry and Chemical Engineering, College of Life Science, Shaoxing University, Zhejiang 312000, PR China.
² College of Chemistry and Chemical Engineering, College of Life Science, Shaoxing University, Zhejiang 312000, PR China.
³ Ningbo Institute of Materials Technology & Engineering, Chinese Academy of Sciences, Ningbo 315201, PR China.
⁴ Institute of Plasma Physics, Chinese Academy of Sciences, P.O. Box 1126, Hefei 230031, PR China.
⁵ College of Chemistry and Chemical Engineering, College of Life Science, Shaoxing University, Zhejiang 312000, PR China. Electronic address: hbw@usx.edu.cn.
⁶ Shanghai Synchrotron Radiation Facility (SSRF), Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201204, PR China.
⁷ School of Environment and Chemical Engineering, North China Electric Power University, Beijing 102206, PR China; College of Chemistry and Chemical Engineering, College of Life Science, Shaoxing University, Zhejiang 312000, PR China; NAAM Research Group, Department of Mathematics, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia.
⁸ NAAM Research Group, Department of Mathematics, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia.
⁹ NAAM Research Group, Department of Mathematics, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia; Department of Mathematics, Quaid-I-Azam University, Islamabad 44000, Pakistan.

PMID: 29059627
DOI: 10.1016/j.envpol.2017.10.047

Abstract

Graphene oxide (GO) may strongly interact with toxic metal ions and mineral particles upon release into the soil environment. We evaluated the mutual effects between GO and Ni (Ni(II)) with regard to their adsorption and co-adsorption on two minerals (goethite and hematite) in aqueous phase. Results indicated that GO and Ni could mutually facilitate the adsorption of each other on both goethite and hematite over a wide pH range. Addition of Ni promoted GO co-adsorption mainly due to the increased positive charge of minerals and cation-π interactions, while the presence of GO enhanced Ni co-adsorption predominantly due to neutralization of positive charge and strong interaction with oxygen-containing functional groups on adsorbed GO. Increasing adsorption of GO and Ni on minerals as they coexist may thus reduce their mobility in soil. Extended X-ray absorption fine structure (EXAFS) spectroscopy data revealed that GO altered the microstructure of Ni on minerals, i.e., Ni formed edge-sharing surface species (at R_Ni-Fe∼3.2 Å) without GO, while a GO-bridging ternary surface complexes (at R_Ni-C∼2.49 Å and R_Ni-Fe∼4.23 Å) was formed with GO. These findings improved the understanding of potential fate and toxicity of GO as well as the partitioning processes of Ni ions in aquatic and soil environments.

Keywords: Graphene oxide; Iron oxides; Mutual interaction.

MeSH terms

Adsorption
Ferric Compounds / chemistry*
Graphite / chemistry*
Iron Compounds
Minerals
Models, Chemical*
Nickel / chemistry*
Oxides
Soil
Spectrum Analysis
Water / chemistry
X-Rays

Substances

Ferric Compounds
Iron Compounds
Minerals
Oxides
Soil
Water
goethite
ferric oxide
Graphite
Nickel