Reductive dechlorination of p-chlorophenol by nanoscale iron / 生物医学与环境科学（英文）

ABSTRACT

<p><b>OBJECTIVE</b>To investigate reductive dechlorination of 4-chlorophenol (4-CP) by nanoscale Fe0 under different conditions.</p><p><b>METHODS</b>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).</p><p><b>RESULTS</b>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.</p><p><b>CONCLUSION</b>The nanoscale Fe0 can be used for sustainable treatment of contaminants in groundwater.</p>