Cyclodextrin-based adsorbents for the removal of pollutants from wastewater: a review
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REVIEW ARTICLE
Cyclodextrin-based adsorbents for the removal of pollutants from wastewater: a review Bingren Tian 1 & Shiyao Hua 2 & Yu Tian 3 & Jiayue Liu 2 Received: 7 June 2020 / Accepted: 6 October 2020 # Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract Water is a vital substance that constitutes biological structures and sustains life. However, water pollution is currently among the major environmental challenges and has attracted increasing study attention. How to handle contaminated water now mainly focuses on removing or reducing the pollutants from the wastewater. Cyclodextrin derivatives, possessing external hydrophilic and internal hydrophobic properties, have been recognized as new-generation adsorbents to exert positive effects on water pollution treatment. This article outlines recent contributions of cyclodextrin-based adsorbents on wastewater treatment, highlighting different adsorption mechanisms of cyclodextrin-based adsorbents under different influencing factors. The crosslinked and immobilized cyclodextrin-based adsorbents all displayed outstanding adsorption capacities. Particularly, according to specific pollutants including metal ions, organic chemicals, pesticides, and drugs in wastewater, this article has classified and organized various cyclodextrin-based adsorbents into tables, which could pave an intuitive shortcut for designing and developing efficient cyclodextrin-based adsorbents for targeted wastewater pollutants. Besides, this article specially discusses cost-effectiveness and regeneration performance of current cyclodextrin-based adsorbents. Finally, the challenges and future directions of cyclodextrin-based adsorbents are prospected in this article, which may shed substantial light on practical industrial applications of cyclodextrin-based adsorbents. Keywords Cyclodextrin . Water pollution . Mechanism . Adsorbents . Application
Introduction Water is an indispensable substance in human survival and social development (Gleick 1996; Fukuda et al. 2019). Water plays an important role in the fields of food, energy, and medicine (Qadir et al. 2007; Kenway et al. 2011; Agre Bingren Tian and Shiyao Hua contributed equally to this work. Responsible Editor: Angeles Blanco * Bingren Tian [email protected] * Jiayue Liu [email protected] 1
School of Chemical Engineering and Technology, Xinjiang University, Urumchi 830046, China
2
School of Pharmacy, Ningxia Medical University, Yinchuan 750004, China
3
School of Computer Science and Engineering, Beihang University, Beijing 100083, China
et al. 2002). However, with the uncontrolled nature of human activities, organic chemicals, dyes, pesticides, etc. were discarded into different water bodies to cause pollution (Li et al. 2016; Schweitzer and Noblet 2018). The harmful contaminants existing in the water could be accumulated through the food chain system, which ultimately causes the negative effect to organism (Wang et al. 2019b; Di et al. 2017). Among these wastes, heavy metals, organic matter (dyes) and pesticid
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