废线切割液絮凝破乳的研究

针对废线切割液乳化稳定性高、ＣＯＤ值高及采用单一絮凝剂处理难以达到破乳目的等特点，通过筛选复配出了最佳破乳絮凝剂，并得出复配剂适用的ｐＨ值、投药剂量和顺序等最佳絮凝条件。试验结果表明，在ｐＨ＝６．５～８．０，投量为２．８～３．０ｇ／Ｌ的条件下，用复配药剂处理ＣＯＤＣｒ为５６３０００ｍｇ／Ｌ的废线切割乳液，油水分离较完全，ＣＯＤＣｒ的去除率达９８．８％以上，其处理效果明显优于常规絮凝剂。     

阜山金矿区构造变形岩相特征与成矿流体构造物理化学特征研究

在构造动力成岩成矿思路的指导下 ,通过构造变形岩相形迹填图区分不同的岩石构造单元 ,并在此基础上研究不同构造带的流体特征 ,进行物理化学场结构与界面分析及流体参量填图 ,试图建立阜山金矿床成矿的构造物理化学模型     

The enantiomeric composition of monoterpene hydrocarbons in the defensive secretions ofNasutitermes termites (Isoptera): Inter- and intraspecific variations

Summary Frontal gland secretions of termite soldiers of the speciesNasutitermes costalis, N. ephratae, N. nigriceps, N. rippertii, andN. hubbardii were analyzed. The chiral compositions of the monoterpene hydrocarbons were investigated by means of two-dimensional gas chromatography. Two of them, 3-carene and-pinene were present in the form of (–)-enantiomers of high purity in the majority of the samples. The other monoterpenes,-pinene, camphene, sabinene, limonene, and-phellandrene, exhibited a great variation in the enantiopurity between different species.-Pinene and limonene varied significantly even between different colonies within the species.N. costalis was the only species with an invariable composition of the secretion, independent of the locality or origin.     

低压离子色谱分离化学发光在线检测NO2-S2-

研究了低压离子色谱分离-柱后鲁米诺化学发光检测方法,并分离测定了NO2-和S2-,以碳酸钠作为洗脱液,Luminol-H2O2-NO2-(或S2-)作为化学发光检测体系,对NO2-和S2-两种阴离子进行在线检测.测定的线性范围分别为NO2-:5.0×10-8～10-6g/mL;S2-:1.0×10-8～6.0×10-7g/mL.检测限NO2-为:3.0×10-9g/mL,S2-为:1.4×10-9g/mL.该方法用于水样中NO2-和S2-含量的测定,结果满意.     

离子色谱法测定酸沉降样品中的阳离子

用新型的阳离子分离柱和抑制柱分析雨水中的阳离子（Ｎａ＾＋、ＮＨ４＾＋、Ｋ＾＋、Ｍｇ＾２＋、Ｃａ＾２＋）对这种方法的准确性和可行性进行了论证。     

液体浮选法回收废旧电脑线路板中铜的研究

本文用物理及化学方法研究了废旧电脑线路板的处理回收工艺。首先通过粉碎机将线路板破碎，在不同破碎时间和转速下，对筛分后各担级的产物作累积产率曲线，得到理想的破碎时间和转速，然后利用液体对破碎的物料进行淳选，重化分析铜与非金属的解离程度，最后通过碘重法检测浮选后铜的回收情况。实验鲒果表明：在R〉2000rpm的条件下线路板粉碎120s，采用三溴甲烷作浮选注，进行液体浮选，在dp〈0．074mm的细粗级中，主要是玻璃纤维和碳化硅等非金属物质，线路板中的铜主要富集在0．84～0．125mm拉级中，在0．84—0．42mm粒级中，铜的回收率可达到97．89％。     

Residual gasoline saturation in unsaturated soil with and without organic matter

The goal of this study was to investigate the influence of one variable, natural organic matter, on residual gasoline saturation in sandy soils. Capillary pressure-saturation (P_c−S) relationships (air-gasoline) were determined for three physically-similar sandy soils, with different organic carbon contents (0.086%, 0.89% and 1.65%) and residual gasoline saturations were compared. Two initial moisture conditions, residual water saturation and air-dry, were evaluated. One soil type was packed to two different bulk densities. Visualization of the soils using cryo-scanning electron microscopy was performed to aid in better understanding the role of the organic matter in the soil. The results showed that soils with higher organic contents had higher residual gasoline saturations when starting with an initially air-dry soil. Increasing the bulk density of the same air-dried soil resulted in an increase in residual gasoline saturation. In the presence of a residual water saturation, however, residual gasoline saturations were virtually identical for the three soils and independent of bulk density; approximately 5–10 times lower than in soil that was initially air-dry. The presence of the residual water effectively coated the surface of the soil thereby reducing or eliminating gasoline/soil interactions. Some residual water may also be occupying very small pore spaces, making these locations inaccessible to the gasoline.     

Polycyclic aromatic hydrocarbons in crude oil-contaminated soil: A two-step method for the isolation and characterization of PAHs

A two-step analytical method is developed for the isolation and characterization of polycyclic aromatic hydrocarbons (PAHs) in crude oil contaminated soil. In the first step, those crude oil components were isolated which are easily mobilized with water from the contaminated soil (determination of groundwater pollution potential). In the second step, the fraction containing the remaining crude oil compounds was extracted using toluene. After the cleanup of the fractions, both fractions were analyzed using high-performance liquid chromatography (HPLC). The HPLC of the toluene extracted fraction shows that along with the sixteen priority pollutants from the US-EPA list, many other polycyclic aromatic hydrocarbons (PAHs) are present as well. It is evident from the chromatograms that a significant amount of PAHs are present as is also the case in the fractions eluted by water. The described method allows the determination of total organic pollutants from crude oil, some of them being potential groundwater contaminants. The major part of the total pollutants could not be mobilized by water and therefore remains in the soil, which was extracted in the second step.     

液膜分离技术在工业装置上的应用

采用液膜分离工艺处理含酚、氰农药废水，处理废水量36t／d，通过工业应用实例试运行，效果一直很好。达到了设计要求。