Xu A.,Huazhong University of Science and Technology |
Shao K.,Huazhong University of Science and Technology |
Wu W.,Huazhong University of Science and Technology |
Fan J.,Environment Protection Science Research and Design Institute of Ningbo |
And 2 more authors.
Cuihua Xuebao/Chinese Journal of Catalysis | Year: 2010
Catalytic degradation of organic pollutants in a sodium bicarbonate solution with Mn2+ ion (0.004-0.1 mmol/L) as the catalyst has been studied using H2O2 as the oxidant. Complete decoloration of methylene blue was achieved in 180 min with 44.0% chemical oxidation demand removal at 25°C at the NaHCO3, MnCl2 and H2O2 concentrations of 25, 0.1, and 100 mmol/L, respectively. The total organic carbon measurement indicated that 13.8% of the carbon was mineralized. The Mn2+/HCO3 - + H2O2 system also showed high ability for oxidative degradation of methyl orange, rhodamine B, and even landfill leachate. The analysis of UV-Vis spectroscopy and reaction kinetics indicated that the MnIV = O intermediate is the key active species in methylene blue degradation.
Huang P.,Zhejiang Wanli University |
Tan D.,Environment Protection Science Research and Design Institute of Ningbo |
Luo Y.,Environment Protection Science Research and Design Institute of Ningbo
Journal of Environmental Science and Technology | Year: 2010
This study aimed at helping an Acrylonitrile Butadiene Styrene (ABS) resin company to improve its environmental performance and comply with the sustainable development required by Chinese government and corporation itself. The processes of ABS resin production amounts of waste gas, water and solid waste. In the most cases in China, the environmental issues from this industry have been focused on the end of pipe treatments during the last two decades. Recently, with the increasing emphasis on environmental protection from the society and the needs of enterprise self-development, the cleaner production programs have been introduced in some ABS resin companies. In this study, we made a close examination of ABS resin company in Ninigbo, an important light industry base in Eastern China. Base on understanding of ABS resin processes and collecting data of energy consumption, resource consumption and discharged pollutants, cleaner production opportunities for three main steps of ABS processes were analyzed. Cleaner production options were proposed for emulsion grafting process step. The feasibility studies for 4 higher-cost options were delineated in this study. After implementing 30 different independent cleaner production options, the company improved its environmental performance obviously. Material consumption and energy consumption per unit product decreased 10.05 and 15.5 kg tce, respectively. Cleaner production brings remarkable economic and environmental benefits for the company by means of energy saving and pollution reducing. © 2010 Asian Network for Scientific Information.