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Removal of 2,4,6-Trinitrotoluene from “Pink Water” Using Molecularly-Imprinted Absorbent

  1. Zihui Meng*,
  2. Qiuyue Zhang,
  3. Min Xue,
  4. Dan Wang,
  5. An Wang

Article first published online: 1 FEB 2012

DOI: 10.1002/prep.201000048

Issue

Propellants, Explosives, Pyrotechnics

Propellants, Explosives, Pyrotechnics

Volume 37, Issue 1, pages 100–106, February 2012

Additional Information

How to Cite

Meng, Z., Zhang, Q., Xue, M., Wang, D. and Wang, A. (2012), Removal of 2,4,6-Trinitrotoluene from “Pink Water” Using Molecularly-Imprinted Absorbent. Propellants, Explosives, Pyrotechnics, 37: 100–106. doi: 10.1002/prep.201000048

Author Information

  1. Department of Applied Chemistry, School of Chemical & Environmental Engineering, Beijing Institute of Technology, Beijing 100081, P. R. China

*Department of Applied Chemistry, School of Chemical & Environmental Engineering, Beijing Institute of Technology, Beijing 100081, P. R. China

Publication History

  1. Issue published online: 15 FEB 2012
  2. Article first published online: 1 FEB 2012
  3. Manuscript Revised: 2 JUN 2011
  4. Manuscript Received: 14 APR 2010

Funded by

  • NSFC. Grant Number: 20775007
  • SKLEST
  • KFJJ0904

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Keywords:

  • Molecular imprinting;
  • Pink water;
  • Nitrobenzene compound;
  • Wastewater treatment

Abstract

Molecularly-Imprinted Polymers (MIPs) were designed, prepared, and tested for the removal of TNT from “pink water”, which contains 2,4,6-trinitrotoluene (TNT) and other nitrobenzene compounds (NBCs) produced in army ammunition plants. We have investigated the interactions between TNT template and different monomers using molecular modeling and spectrometric methods, which enables us to optimize the MIP compositions. A suspension polymerization method was utilized to prepare MIP beads with an average diameter of 25 µm, and an imprinting effect of 4.3 was achieved. Furthermore, we have constructed a model absorbance reactor using a flash chromatography system, which was successfully used to monitor the removal of TNT and other NBCs on-line, and the MIP absorbent was regenerated in-situ. Compared with granular activated carbon, the capacity of the MIP absorbent is 65-fold higher. In addition, the MIP absorbent can be regenerated easily, and the capacity only decreases by 7 % after four rounds of regeneration. Besides “pink water”, the MIP absorbent can also be used to remove NBCs in the waste stream from TNT production.

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