Journal
WATER SCIENCE AND TECHNOLOGY
Volume 76, Issue 9, Pages 2280-2290Publisher
IWA PUBLISHING
DOI: 10.2166/wst.2017.319
Keywords
adsorption; coking coal; mechanistic aspects; pH value; purification mechanism
Funding
- National Natural Science Foundation of China [51604280, 51504262]
- State Key Laboratory of Mineral Processing [BGRIMM-KJSKL-2015-03]
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cCoal is a porous medium and natural absorbent. It can be used for its original purpose after adsorbing organic compounds, its value does not reduce and the pollutants are recycled, and then through systemic circulation of coking wastewater zero emissions can be achieved. Thus, a novel method of industrial organic wastewater treatment using adsorption on coal is introduced. Coking coal was used as an adsorbent in batch adsorption experiments. The quinoline, indole, pyridine and phenol removal efficiencies of coal adsorption were investigated. In addition, several operating parameters which impact removal efficiency such as coking coal consumption, oscillation contact time, initial concentration and pH value were also investigated. The coking coal exhibited properties well-suited for organics' adsorption. The experimental data were fitted to Langmuir and Freundlich isotherms as well as Temkin and Redlich-Peterson (R-P) models. The Freundlich isotherm model provided reasonable models of the adsorption process. Furthermore, the purification mechanism of organic compounds' adsorption on coking coal was analysed.
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