TY - JOUR
T1 - Removal of 2,4,6-trinitrotoluene from "pink water" using molecularly-imprinted absorbent
AU - Meng, Zihui
AU - Zhang, Qiuyue
AU - Xue, Min
AU - Wang, Dan
AU - Wang, An
PY - 2012/2
Y1 - 2012/2
N2 - 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 25Âμm, 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.
AB - 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 25Âμm, 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.
KW - Molecular imprinting
KW - Nitrobenzene compound
KW - Pink water
KW - Wastewater treatment
UR - https://www.scopus.com/pages/publications/84863150134
U2 - 10.1002/prep.201000048
DO - 10.1002/prep.201000048
M3 - Review article
AN - SCOPUS:84863150134
SN - 0721-3115
VL - 37
SP - 100
EP - 106
JO - Propellants, Explosives, Pyrotechnics
JF - Propellants, Explosives, Pyrotechnics
IS - 1
ER -