Environ Sci Pollut Res DOI 10.1007/s11356-013-2431-1
RESEARCH ARTICLE
Enhanced degradation of ortho-nitrochlorobenzene by the combined system of zero-valent iron reduction and persulfate oxidation in soils Hai-bo Xu & Dao-yuan Zhao & Yu-jiao Li & Pei-ya Liu & Chang-xun Dong
Received: 27 August 2013 / Accepted: 4 December 2013 # Springer-Verlag Berlin Heidelberg 2014
Abstract ortho-Nitrochlorobenzene (o-NCB) in soil poses significant health risks to human because of its persistence and high toxicity. The removal of o-NCB by both zero-valent iron (ZVI) and chemical oxidation (persulfate) was investigated by batch experiments. The o-NCB removal rate increases significantly from 15.1 to 97.3 % with an increase of iron dosage from 0.1 to 1.0 mmol g−1. The o-NCB removal rate increases with the decrease of the initial solution pH, and a removal efficiency of 90.3 % is obtained at an initial pH value of 6.8 in this combined system. It is found that temperature and soil moisture could also increase the o-NCB removal rate. The o-NCB degradation rate increases from 83.9 to 96.2 % and from 41.5 to 82.4 % with an increase of temperature (15 to 35 °C) and soil moisture (0.25 to 1.50 mL g−1), respectively. Compared to the persulfate oxidation system and ZVI system, the persulfate–iron system shows high o-NCB removal capacity. o-NCB removal rates of 41.5 and 62.4 % are obtained in both the persulfate oxidation system and the ZVI system, while the removal rate of o-NCB is 90.3 % in the persulfate– iron system.
Keywords ortho-Nitrochlorobenzene . Zero-valent iron . Reduction . Persulfate oxidation–ZVI system . Advanced oxidation
Responsible editor: Bingcai Pan H.
RESEARCH ARTICLE
Enhanced degradation of ortho-nitrochlorobenzene by the combined system of zero-valent iron reduction and persulfate oxidation in soils Hai-bo Xu & Dao-yuan Zhao & Yu-jiao Li & Pei-ya Liu & Chang-xun Dong
Received: 27 August 2013 / Accepted: 4 December 2013 # Springer-Verlag Berlin Heidelberg 2014
Abstract ortho-Nitrochlorobenzene (o-NCB) in soil poses significant health risks to human because of its persistence and high toxicity. The removal of o-NCB by both zero-valent iron (ZVI) and chemical oxidation (persulfate) was investigated by batch experiments. The o-NCB removal rate increases significantly from 15.1 to 97.3 % with an increase of iron dosage from 0.1 to 1.0 mmol g−1. The o-NCB removal rate increases with the decrease of the initial solution pH, and a removal efficiency of 90.3 % is obtained at an initial pH value of 6.8 in this combined system. It is found that temperature and soil moisture could also increase the o-NCB removal rate. The o-NCB degradation rate increases from 83.9 to 96.2 % and from 41.5 to 82.4 % with an increase of temperature (15 to 35 °C) and soil moisture (0.25 to 1.50 mL g−1), respectively. Compared to the persulfate oxidation system and ZVI system, the persulfate–iron system shows high o-NCB removal capacity. o-NCB removal rates of 41.5 and 62.4 % are obtained in both the persulfate oxidation system and the ZVI system, while the removal rate of o-NCB is 90.3 % in the persulfate– iron system.
Keywords ortho-Nitrochlorobenzene . Zero-valent iron . Reduction . Persulfate oxidation–ZVI system . Advanced oxidation
Responsible editor: Bingcai Pan H.
