NDLI: Removal of Phenolic Compounds from Aqueous Solutions Using Sludge-Based Activated Carbons Prepared by Conventional Heating and Microwave-Assisted Pyrolysis

Content Provider	Springer Nature Link
Author	Reis, Glaydson S. Adebayo, Matthew A. Sampaio, Carlos H. Lima, Eder C. Thue, Pascal S. Brum, Irineu A. S. Dias, Silvio L. P. Pavan, Flavio A.
Copyright Year	2016
Abstract	Sludge-derived activated carbons (ACs) were prepared by conventional heating and microwave pyrolysis. The ACs were characterized using several analytical and functional techniques and used for removal of six phenolic compounds from aqueous solutions. The adsorbents exhibited similar features and possessed hydrophobic surfaces. The ACs were assigned mesoporous materials, with specific surface areas of up to 641 and 540 m$^{2}$ g$^{−1}$ for CAC-500 and MAC-980, respectively. The preliminary results indicated that phenol removal onto the ACs increased in the order: m-cresol < phenol < o-cresol < 2-chrorophenol < 2-nitrophenol < hydroquinone. Hydroquinone exhibited the highest adsorption capacity and was chosen to continue the remaining part of the experimental work—kinetic and isothermal studies. The adsorption kinetic and isotherm data were well described by the Avrami fractionary order and Redlich–Peterson models, respectively. The maximum amounts (Q $_{max}$) of hydroquinone adsorbed at 25 °C were too high, reaching 1218.3 and 1202.1 mg g$^{−1}$ for CAC-500 and MAC-980, respectively. The mechanism of adsorption was proposed in this work, and it was suggested that donor–acceptor complex and π–π interactions play major roles in the adsorption process. The adsorbents were also tested on simulated effluents. The two ACs displayed good efficiency for the treatment of industrial simulated effluents.
Starting Page	1
Ending Page	17
Page Count	17
File Format	PDF
ISSN	00496979
Journal	Water, Air, and Soil Pollution
Volume Number	228
Issue Number	1
e-ISSN	15732932
Language	English
Publisher	Springer International Publishing
Publisher Date	2016-12-20
Publisher Place	Cham
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Sewage sludge Microwave and conventional heating Activated carbons Phenolic compounds Hydroquinone Adsorption mechanism Simulated effluents Environment Water Quality/Water Pollution Atmospheric Protection/Air Quality Control/Air Pollution Soil Science & Conservation Hydrogeology Climate Change/Climate Change Impacts
Content Type	Text
Resource Type	Article
Subject	Ecological Modeling Environmental Chemistry Pollution Environmental Engineering Water Science and Technology

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