Feasibility investigation of oily wastewater treatment by combination of zinc and PAM in coagulation/flocculation

Poly-zinc silicate (PZSS) is a new type of coagulant with cationic polymer synthesized by polysilicic acid and zinc sulfate. It has been used in several sorts of wastewaters treatment, but not used in oily wastewater treatment. In this study, we investigated the coagulation/flocculation of oil and suspended solids in heavy oil wastewater (HOW) by PZSS and anion polyacrylamide (A-PAM). The properties of PZSS cooperated with A-PAM were compared with PAC and PFS in dosages, PAMs amount, settling time, pH value and flocs morphology. The results showed that PZSS was more efficient than PAC and PFS. Under the optimum experimental conditions of coagulation/flocculation (dosage: 100mg/L, A-PAM dosage: 1.0mg/L, settling time time: 40min and pH 6.5-9.5), more than 99% of oil was removed and suspended solid value less than 5mg/L by using PZSS cooperated with A-PAM, which could satisfy the demands of the pre-treatment process for HOW to be reused in the steam boiler or recycled into the injecting well.     

富集孢粉化石的一种方法

本论述了孢粉，沟鞭藻化石与矿物颗粒相互分离的方法，并与传统的氢氟酸冷处理方法进行实验对比。结果表明，该方法摒弃有毒重液，提高了化石收获率。     

水平井在稠油老区应用的数值模拟研究

用现场测试、选层注汽资料和数值模拟方法，研究了辽河油田齐40块直井蒸汽吞吐后期油层剩余油分布。在此基础上，以经济指标为目标函数，重点对水平井与现有直井的组合方式、开采方式、注采参数方案进行了优选。结果表明：蒸汽吞吐阶段，射孔井段上部油层剩余油饱和度为49．9％～52．3％，下部为54．7％～62．0％；水平井组注蒸汽开采的采收率较直井组可提高12．68％，热油比提高0．2627kg／kJ．     

河南湖田稠油加密井水淹层测井解释方法

河南油田稠油开发主要采用注蒸汽吞吐的方式，为了进一步提高稠油资源的采收率，采用加密井方案。通过钻井取芯、测井、投产表明，稠油加密井部分已被蒸汽水水淹。正确评价稠油加密井水淹层位和强度是提高稠油加密井开采效果的关键。通过研究，提出了一套利用测井资料评价稠油加密井水淹层的方法，经生产实践验证效果较好。     

Profiling contextual factors which influence safety in heavy vehicle industries

A significant proportion of worker fatalities within Australia result from truck-related incidents. Truck drivers face a number of health and safety concerns. Safety culture, viewed here as the beliefs, attitudes and values shared by an organisation’s workers, which interact with their surrounding context to influence behaviour, may provide a valuable lens for exploring safety-related behaviours in heavy vehicle operations. To date no major research has examined safety culture within heavy vehicle industries. As safety culture provides a means to interpret experiences and generate behaviour, safety culture research should be conducted with an awareness of the context surrounding safety. The current research sought to examine previous health and safety research regarding heavy vehicle operations to profile contextual factors which influence health and safety. A review of 104 peer-reviewed papers was conducted. Findings of these papers were then thematically analysed. A number of behaviours and scenarios linked with crashes and non-crash injuries were identified, along with a selection of health outcomes. Contextual factors which were found to influence these outcomes were explored. These factors were found to originate from government departments, transport organisations, customers and the road and work environment. The identified factors may provide points of interaction, whereby culture may influence health and safety outcomes.     

手性离子液体应用的研究进展

手性离子液体作为一种新型的功能材料,近年来逐渐成为研究的热点。重点综述了其在Michael加成、Diels-Alder反应、羟醛缩合反应、Baylis-Hillman加成等不对称合成反应及光谱识别、色谱分离、材料合成等领域的最新应用发展,并指出了限制手性离子液体应用的主要困难和问题,展望了今后的发展方向。     

咪唑鎓盐及其复合物的制备和抗菌性能研究进展

目的 综述咪唑鎓盐及其复合物的制备方法和抗菌性能的研究进展,探讨咪唑鎓盐及其复合物在包装领域的应用价值.方法 阐述影响鎓盐及其复合物制备、抗菌性能的各项因素,总结其合成方法及抗菌机理.结果 发现温度对咪唑鎓盐的制备影响最大,烷基链长度对咪唑鎓盐的抗菌性能影响最为显著.结论 咪唑鎓盐及其复合物抗菌持久、热稳定性优异、绿色环保,可弥补传统抗菌剂的不足,在涂料包装、医药包装、食品包装等领域有着巨大应用前景.     

The Attainable Superheat: From Simple to Polymeric Liquids

The phenomenon of the attainable superheat of a substance and the kinetics of nucleation of a vapor phase have been studied experimentally for liquids with molecular weight from 10² to 10⁴. The values of the temperature of spontaneous boiling-up T* have been measured over a wide range of parameters (pressure, heating rate, CO₂ content, molecular weight, and thermal stability of a substance) by the method of controlled pulse heating of a thin wire probe using pulse lengths from 0.01 to 4 ms. The investigation is based on a gradual increase in the molecular weight of a sample. The peculiarities of spontaneous nucleation in polymeric liquids that do not boil without decomposition are discussed. It is shown that this phenomenon is a reproducible relaxation process in a polymeric system, which accompanies the initial stage of its thermal decomposition.     

Thermal Conductivity of Liquid Tin and Indium

The present paper reports new measurements of the thermal conductivity of liquid tin and indium. The measurements have been performed at atmospheric pressure in a range of temperatures from 450 to 750 K using a new experimental method based on the principle of the transient hot wire technique. The particular version of the technique employed for molten metals has been shown to have an accuracy in the measurement of the thermal conductivity of molten metals of ±2%. Ultimately, it is intended that the technique operate in a wide range of temperatures, from ambient up to 1200 K, and work is in progress to increase the working temperature and to extend the range of measurements. The results are compared with experimental data reported in the literature by other authors and with predictions of the Wiedemann and Franz law.