CoFe2O4/ordered mesoporous carbon (OMC) nanocomposites were synthesized and tested as heterogeneous peroxymonosulfate (PMS) activator for the removal of rhodamine B. Characterization confirmed that CoFe2O4 nanoparticles were tightly bonded to OMC, and the hybrid catalyst possessed high surface area, pore volume, and superparamagnetism. Oxidation experiments demonstrated that CoFe2O4/OMC nanocomposites displayed favorable catalytic activity in PMS solution and rhodamine B degradation could be well described by pseudo-first-order kinetic model. Sulfate radicals (SO4−·) were verified as the primary reactive species which was responsible for the decomposition of rhodamine B. The optimum loading ratio of CoFe2O4 and OMC was determined to be 5:1. Under optimum operational condition (catalyst dosage 0.05 g/L, PMS concentration 1.5 mM, pH 7.0, and 25 °C), CoFe2O4/OMC-activated peroxymonosulfate system could achieve almost complete decolorization of 100 mg/L rhodamine B within 60 min. The enhanced catalytic activity of CoFe2O4/OMC nanocomposites compared to that of CoFe2O4 nanoparticles could be attributable to the increased adsorption capacity and accelerated redox cycles between Co(III)/Co(II) and Fe(III)/Fe(II).
Environmental Science and Pollution Research - Previous studies have reported that exposure to phthalates and polycyclic aromatic hydrocarbons (PAHs) is individually associated with altered semen... 相似文献
The ethnic communities of Lugu Lake have experienced the rapid development of tourism because of the attractions of their culture and traditional customs as well as their beautiful environment. Tourism and other economic activities have a variety of socio-cultural effects on host communities. Based on a survey of 105 Mosuo families, statistic correlation analysis was used to examine the local people's viewpoints regarding marriage, language, traditional dress, diet, and factors which could lead to changes in people's opinions. The results show that although Mosuo people are more open to the outside world, Axia relationships and matrilineal families still dominate their life. More than 50% of interviewees have Axia relationships and live in matrilinear families. Tourism income, education and age are three important factors that impact on local people's viewpoints regarding their culture and life. People who are more educated and earn more money from tourism prefer traditional culture and customs. The younger generation is more likely to be affected by tourism because they have contact with the outside world more often in their everyday life. Further research is needed on how to protect the local culture from the boom in tourism, as well as how to minimise its influence on local residents. 相似文献