| 1 | Synthesis and characterization of NaA zeolite particle as intumescent fiame retardant in chloroprene rubber system显示文摘NaA zeolite with average particle size of 1 m was successfully synthesized by microwave heating. Inu-ences of pre-crystallization time,microwave power and microwave heating time on the synthesis of NaA zeolite were investigated. The as-synthesized sample was characterized by X-ray diffraction(XRD),scanning electron microscopy(SEM) and particle size distribution(PSD) . Thermal and fiame retardant properties as intumescent fiame retardant(IFR) in chloroprene rubber(CR) system,such as thermo-gravimetry(TG),limiting oxygen index(LOI),burning rate(BR) and specic extinction area(SEA) were further investigated by adding NaA zeolite particles to CR. Experimental results show that the thermal stability and LOI value increased while BR and SEA decreased by adding 5 phr NaA zeolite into the 40 phr IFR filled CR system. | Wenhui Yuana Huarong Chen Ranran Chang Li Li | 2011 | Particuology2011，9，3： | 11 |
| 2 | Application of a novel backwashing process in upflow biological aerated filter显示文摘To improve the efficiency of backwashing in upflow biological aerated filter (BAF), a novel backwashing process named air-water siphon backwashing (AWSB) was proposed and applied on laboratory scale. The effects of backwashing on turbidity and suspended solid (SS) in backwashing efluent using this new backwashing process were compared with those of traditional backwashing process, namely air-water backwashing (AWB). In AWB, the turbidity of backwashing efluent maintained 100 NUT when consumed 60 min and 10.5 L water. However, in AWSB, it declined to 44 NUT, consumed 40 min, and 7 L water. The COD removal of BAF after backwashing was also analyzed. The average removal rate of COD in the reactor backwashed by AWB and AWSB was 89.34% and 90.91%, respectively. Compared with AWB, the backwashing interval had been prolonged 35%. The volume of backwashing water in that AWSB was only 66.7% of that in AWB. The results demonstrated that AWSB required less water and took shorter backwashing time relative to AWB to achieve the same turbidity of backwashing efluent, and AWSB was more effective in removing fouling than that of AWB. More significant advantage of AWSB was that the backwashing interval was effectively prolonged. | Jinshui Yang Weijie Liu Baozhen Li Hongli Yuana Meiping Tong Jinsong Gao | 2010 | Journal of Environmental Sciences2010，22，3： | 7 |
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