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Reductive dechlorination of p-chlorophenol by nanoscale iron
Rong Cheng1, Jian-Long Wang, Wei-Xian Zhang
1Laboratory of Environmental Technology, INET, Tsinghua University, Beijing 100084, China.
Objective:
To investigate reductive dechlorination of 4-chlorophenol (4-CP) by nanoscale Fe0 under different conditions.
Methods:
Nanoscale Fe0 was synthesized by using reductive method. 4-CP and its intermediate products were analyzed by HPLC. Chlorine ion was quantified with DX-100 ion chromatograph. Nano-iron particles were observed under a FEI Quanta 200 FEG environmental scanning electron microscope (ESEM).
Results:
The size of the particles was in the range of 10-100 nm. The nano-iron particles could reduce 4-CP effectively. The initial concentration of 4-CP increased with the decrease of the relative degradation rate, whereas the reduced amount of 4-CP increased. Temperature could influence both the dechlorination rate and the reaction pathway. Moreover, the stability and durability of nanoscale Fe0 was evaluated through batch studies over extended periods of time.
Conclusion:
The nanoscale Fe0 can be used for sustainable treatment of contaminants in groundwater.
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