惰性粉对嗜卷书虱的致死效果及机理研究

本研究采用拌粮法研究了不同浓度和粒径的硅藻土、沸石粉、蒙脱石和高岭土等四种惰性粉对嗜卷书虱的作用效果。研究结果表明,与其他3种惰性粉相比,沸石粉对嗜卷书虱的作用最好,处理时间为7 d时,在处理浓度为1000 mg/kg条件下,校正死亡率即达到了76.32%。而在所研究的粒径范围内,不同粒径对嗜卷书虱的作用除在处理7 d时,100目高岭土的作用效果显著优于400目的外,其他处理并没有显著差异。利用X射线衍射(XRD)、扫描电子显微镜(SEM)和Brunauer-Emmett-Teller(BET)3种检测手段研究4种惰性粉的组成、形貌和吸附特性,以分析不同惰性粉对嗜卷书虱作用效果存在差异的原因,为后期选择或改性出杀虫效果更好的惰性粉提供参考。

Fractal dimension of coal particles and their CH_4 adsorption

We describe the fractal analysis of three differently sized coal samples(0.350-0.833 mm,0.245-0.350 mm,and 0.198-0.245 mm).The influence of fractal dimension on CH 4 adsorption capacity is investigated.The physical parameters of the samples were determined via the Brunauer-Emmett-Teller(BET) theory.A CH 4 adsorption study over the pressures range from 0 to 5 MPa was carried out with a new volumetric measurement system.The CH 4 adsorption was measured using the differently sized coal.Two fractal dimensions,D 1 and D 2 were determined over the pressure ranges from 0 to 0.5 MPa and from 0.5 to 1 MPa,using the Frenkel-Halsey-Hill(FHH) method.We conclude that the two fractal dimensions correlate with the CH 4 adsorption capacity of the coal:increasing CH 4 adsorption capacity occurs with a corresponding increase in fractal dimension.Furthermore,D 1 and D 2 are positively correlated with surface area,pore volume,and samples size.The size distribution of the samples has fractal characteristics.

剪纸状碳的合成及其吸附性能(英文)

以二茂铁和四氯乙烯作为反应物,采用热解法在600℃反应10h得到一种高产率的剪纸状的碳片.扫描电镜的结果表明,剪纸状碳材料的厚度为20～40nm,宽度为100～200nm.通过氮气吸附-脱附等温曲线计算出产物的比表面积高达1 209m2/g,孔径分布在0.58～1.2nm之间.一系列对比实验表明,合成剪纸状碳材料的最佳条件为:0.093g二茂铁,反应温度为600℃,反应时间为10h.通过调整二茂铁与四氯乙烯的比例,可控制产物的形貌从剪纸状转化为空心球.剪纸状碳对于苯酚的吸附性能(82%)要远高于对罗丹明B的吸附性能(48%),并对其给出了可能的解释.