影响活性炭吸附苯系物条件的研究

活性炭吸附法是目前最为广泛使用的处理ＶＯＣｓ的方法之一,本实验用苯、甲苯、二甲苯作为ＶＯＣｓ的代表物,研究ＶＯＣｓ的浓度、物化性质及气流量对活性炭吸附的影响。实验结果表明,ＶＯＣｓ浓度与穿透时间的对数成线性关系;物化性质对透过点有影响,甲苯比苯更易透过;流量大的ＶＯＣｓ气流较快透过。     

微分电位溶出法测柠檬酸

报道了微分电位溶出法 (DPS)在 0 .1mol/LHAc -NaAc介质中测定柠檬酸 .在选定条件下 ,于4 .0× 10 - 5～ 8.0× 10 - 3mol/L范围内有较好的线性关系 ,r =0 .9893,检测限为 1.0× 10 - 5mol/L .用于常见汽水测定 ,结果满意     

Deposition of the platinum crystals on the carbon nanotubes

A new technique and the affecting factors for depositing platinum on the carbon nanotubes were investigated. The results show that the deposited platinum crystals in the atmosphere of hydrogen or nitrogen have a small size and a homogeneous distribution on the surface of the carbon nanotubes. The pretreatment would decrease the platinum particles on the carbon nanotubes significantly.     

The carbon isotope study of biomarkers in the Maoming and the Jianghan tertiary oil shale

In terms of the individual carbon isotope data of biomarkers present in the typical freshwater lake sediment (Maoming oil shale) and saline lake sediment lake (Jianghan oil shale) of China, this paper discusses their precursors and depositional environments of biomarkers in both sediment samples. Our studies showed that phytane and pristane of the Maoming oil shale were derived from the phytol side chain of chlorophyll a. By comparing the isotopic composition of 4-methyl sterane with that of sterane and hopane, it is suggested that 4-methyl sterane which has a higher abundance in the Maoming oil shale come from bacteria. The isotopic composition of biomarkers from the Jianghan rock sample (saline lake sediment ) is significantly different from that of the Maoming oil shale (freshwater lake sediment). Gammacerane was derived from haloprotozoan, with δ13C being about -25.8‰, just in consistency with the value reported in previous studies. The isotopic composition of phytane and pristane in the Jianghan rock is similar to that of sterane and 4-methyl sterane derived from phytoplanktons, illustrating their commonprecursors were algae. This paper reported for the first time the carbon isotope data of porphyrin obtained by GC-IRMS techniques. The approximate δ13C of C32DPEP and C31DPEP porphyrin from the Jianghan Basin indicated that the porphyrin was derived from chlorophyll. In the Maomingoil shale C32DPEP was enriched in 13C relative to C32etio and C31DPEP, implying that C32DPEP came from chlorophyll, and C32etio and C31DPEP are of other origins.     

峨眉山柿子坪热田地下水碳氧同位素特征初步研究

在峨眉山柿子坪热田地质调查及热水勘探过程中 ,采用了碳、氧同位素地球化学方法 ,结果发现不同成因类型的地下水其碳、氧同位素组成特征各不相同 ,为查明地下热水的形成条件提供了重要依据 ,表明用地下水中 HCO-3 的碳、氧同位素组成来研究地下热水系的发育特征是有前景的     

Advanced Treatment of Wastewater and Slightly Deteriorated Raw Water by Biological Activated Carbon Method under Rich Oxygen Condition

Rich oxygen-biological activated carbon(RO-BAC)method developed from traditional BAC method is a sys-tem in which high pressure is applied to improve the oxy-gen concentration of the influent.Experiment withwastewater and the slightly deteriorated raw water showsthe system is an effective option for advanced treatmentof industry wastewater and pretreatment of slightly dete-riorated raw water.The experiment results and the in-fluential factors are discussed in this paper.     

金属卟啉类模拟酶催化剂催化氧化饱和碳原子官能团化的研究进展

以 2 8篇文献综述了金属卟啉模拟酶催化氧化饱和碳原子官能团化的研究进展。     

预氧丝原位炭化无粘结剂C／C复合材料工程研究

从简化工艺、降低成本的目的出发,研究了以生石油焦为基体材料,以廉 ＰＡＮ－ＯＦ（聚丙烯腈预氧丝）代替ＣＦ作为增强纤维,不加粘结剂直接成型再原位炭化制备高性能Ｃ／Ｃ复合材料的可行性。实验表明,这种新工艺具有原材料便宜,工艺流程短操作简单等特点,有大幅度降低Ｃ／Ｃ复合材料制造成本的潜力。     

氢化碳膜的胺掺杂及其对甲酸蒸气的质量传感特性

通过将其他元素或原子基团掺入氢化非晶碳膜网结构中的方法,可以实现对α－Ｃ：Ｈ薄膜的改性,赋予α－Ｃ：Ｈ膜新的特性,从而满足某些特殊应用的需要,用含胺基的碳氢化合物正丁胺作为碳源,用等离子体增强化学气相沉积方法制备α－Ｃ：Ｈ膜．薄膜的红外光分析表明胺基团已掺入薄膜的网络结构中,喇曼光谱分析表明薄膜具有无序态碳、三配位碳和四配位碳原子的混合结构,但主要成份为无序态碳,将掺胺的α－Ｃ：Ｈ薄膜作为质量传     

类金刚石薄膜的喇曼光谱高斯分解研究

采用过滤式阴极电弧沉积的方法获得类金刚石薄膜.喇曼光谱的分析表明,这种薄膜是典型的无氢类金刚石薄膜.喇曼光谱的高斯分解研究表明:随着偏压的增加,D线和G线的位置__d、__g向低频移动,半高宽F_g减小、F_d增加,在偏压为-100V时,D线和G线强度比I_d/I_g有最大值.