Abstract
Graphene, a novel carbon allotrope, is single-layered graphite with honeycomb lattice. Its unique structure endows graphene many outstanding physical/chemical properties and a large surface area, which are beneficial to its applications in many areas. The potential applications of graphene in pollution remediation are adsorption, membrane separation, catalysis, environmental analysis, and so on. The adsorption efficiency of graphene adsorbents largely depends on its surface area, porous structure, oxygen-containing groups and other functional groups, adsorption conditions, and also the properties of adsorbates. With appropriate modifications, graphene materials are mostly efficient adsorbents for organic pollutants (e.g. dyes, pesticides, and oils) and inorganic pollutants (e.g. metal ions, nonmetal ions, and gas). Since our first report of graphene adsorbents in 2010, plenty of studies have been dedicated to developing various graphene adsorbents and to evaluating their performance in treating contaminated water. Recently, there is a growing trend in graphene adsorbents that could be applied in soil remediation, where the situation is much more complicated than in aqueous systems. Herein, we review the design of graphene adsorbents for water treatment and analyze their potential in soil remediation. Several suggestions to accelerate the research on graphene-based soil remediation technology are proposed.
Funding source: China Natural Science Foundation
Award Identifier / Grant number: 21777132 and 21507084
Funding statement: We acknowledge financial support from the China Natural Science Foundation (Funder Id: 10.13039/501100001809, nos. 21777132 and 21507084), Top-notch Young Talents Program of China, and the Functional Polymer Innovation Team Project, Southwest Minzu University (no. 14CXTD04).
About the authors
Lianqin Zhao received his BS degree from Qingdao University of Science and Technology in 2012. He obtained his MS degree from Southwest Minzu University in 2015. He is pursuing his PhD at Shanghai Jiao Tong University under the supervision of Prof. Deyi Wu. His research focuses on the environ-application of nanotechnology.
Sheng-Tao Yang received his BSc degree in 2006 and PhD in 2011 at Peking University majoring in chemistry. He was a research scholar at Clemson University from 2008 to 2009. He also worked as a visiting scholar at Hunan University from 2011 to 2012. Since 2011, he joined the College of Chemistry and Environment Protection Engineering, Southwest Minzu University, in China, as an assistant professor. He was promoted to full professor in 2016. His research interests are primarily in the preparation, environmental applications, and biosafety of carbon nanomaterials.
Ailimire Yilihamu obtained her BS degree in Applied Chemistry from Southwest Minzu University in 2017. She is pursuing her master’s degree at Southwest Minzu University under the supervision of Prof. Sheng-Tao Yang. Her research focuses on the bio-effects of carbon nanomaterials.
Deyi Wu received his PhD in 1994 at Ehime University, Japan. He worked in University and Scientific Research Institute until 2001. He joined in the School of Environmental Science and Engineering of Shanghai Jiao Tong University in 2001. His research focused on eco-material exploitation and ecological remediation.
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