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Peng Y.-H.,State Key Laboratory of Pollution Control | Wang J.-N.,State Key Laboratory of Pollution Control | Wang J.-N.,University of Applied Sciences and Arts Northwestern Switzerland | Yang X.,State Key Laboratory of Pollution Control | And 2 more authors.
Chinese Chemical Letters | Year: 2014

A new chelating resin DVB-MA-HDA modified with hydroxamic acid groups was prepared for the fast removal of Ni2+ from water. SEM, BET, elemental analysis, FT-IR spectroscopy and XPS were used to characterize this new adsorbent. Batch adsorption experiment indicated that the equilibrium adsorption capacity of DVB-MA-HD for Ni2+ was more than 130 mg/g, and the adsorption isotherm can be well fitted by the Langmuir model. The adsorption kinetic curve indicates that more than 60% of the adsorption amount of Ni 2+ at equilibrium occurred within the initial 20 min. 0.1 mol/L EDTA solution could desorb Ni2+ from DVB-MA-HDA effectively. © 2013 Jin-Nan Wang. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All rights reserved. Source

Xing M.,State Key Laboratory of Pollution Control | JianYang,State Key Laboratory of Pollution Control | Wang Y.,State Key Laboratory of Pollution Control | Liu J.,State Key Laboratory of Pollution Control | Yu F.,State Key Laboratory of Pollution Control
Journal of Hazardous Materials | Year: 2011

Reduction and stabilization of sewage sludge during the clarification of municipal wastewater was synchronously shown to be improved significantly in a pilot-scale vermifiltration using an epigeic earthworm Eisenia fetida. The present study aimed to select a better filter media suited to vermifiltration performance by the comparisons of sludge yields, the characteristics of the by-products of vermifiltration-vermicast and the abrasions of earthworms between ceramsite and quartz sand. It was observed that the sludge yield of the CVB (Ceramsite Vermibed) ranged from 0.07 to 0.09kg SS/kgCODremoved at ambient temperature of 4-29°C, representing 81% and 50% lower than that of the SVB (Quartz Sand Vermibed) and other reduction systems mentioned in this study. In addition, the sludge morphology variations described that the vermicast sludge from the CVB was more completely digested by earthworm than that of the SVB. The abrasions of the body wall of the earthworms in the CVB depicted less injured than that of in the SVB. So the ceramsite as filter media was better suited for the vermifiltration than the quartz sand. © 2010 Elsevier B.V. Source

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