Aqueous-Phase Temperature Swing Adsorption for Pesticide Removal
| Autor: | Matthias Wessling, Anh H. Q. Dang, Burkhard Ohs, Benedikt M. Aumeier, Süleyman Yüce |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Exothermic reaction
Aqueous solution Consumables Materials science Aqueous two-phase system Temperature General Chemistry 010501 environmental sciences 01 natural sciences Water Purification Kinetics Adsorption Chemical engineering medicine Environmental Chemistry Sewage treatment Water treatment Pesticides Water Pollutants Chemical 0105 earth and related environmental sciences Activated carbon medicine.drug |
| Zdroj: | Environmental sciencetechnology. 53(2) |
| ISSN: | 1520-5851 |
| Popis: | Recently, activated carbon adsorption for water treatment regained substantial attention due to the emerging task to remove trace organic compounds such as pesticides. In many applications, especially in decentralized water treatment, one major drawback of adsorbents is their limited recyclability due to inadequate logistics or uneconomical reactivation. In this lab-scale study, we present the temperature swing adsorption in the aqueous phase that allows the in situ regeneration of fixed-bed adsorbers, and prove its technical feasibility. Complying with circular water economy principles, we eliminated the pivotal need for regular replacement and consumables by employing only clean water instead of dedicated regeneration solutions. Adsorption of the herbicide amitrole in aqueous solution on granular activated carbon was exothermic (ΔH = −14.4 ± 3.2 kJ mol–1 for T = 20–94 °C) and followed the Freundlich model. The proposed method consisting of a short counterflow flush with liquid water at 125 °C effectivel... |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|