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排序方式: 共有135条查询结果,搜索用时 46 毫秒
1.
陆建刚 《化学工业与工程技术》1995,16(4):9-12
开展了以KCI、(NH_4)_2SO_4为原料制备K_2SO_4的研究工作。确定了循环比、洗涤条件与反应时间。K_2总转化率达75%,产品收率约97%;产品中Cl含量为0.5%~1.5%。 相似文献
2.
Dual chamber microbial fuel cell reactors were inoculated with a mixed culture of sulfate-reducing bacteria with anode potential being the controlling parameter. A negative poised anode potential enhanced the performance of this fuel cell while a positive poised anode potential had adverse effects on cell performance. Negative anodic potential affects the biofilm characteristics, as evidenced by electrochemical analysis. Microbial community was changed accordingly. 相似文献
3.
油田注水系统中的细菌类型及抑制方法 总被引:1,自引:0,他引:1
详细介绍了油田注水系统中主要存在的细菌类型、生存条件、危害机理等,并总结概括了杀菌剂的种类、选用原则和投加方法,在最后,对油田注水用杀菌剂的发展方向进行了展望。 相似文献
4.
Jianqin Zhang Shenglai Wang ChangShui Fang Xun Sun Qingtian Gu Yiping Li Bo Wang Bing Liu Xiaoming Mu 《Materials Letters》2007,61(13):2703-2706
KDP crystals were grown from the aqueous solution with different concentrations of sulphate by both the traditional temperature-lowering method and the rapid growth method. Sulphate showed a great effect on the growth and the properties of KDP crystals. With the rise of the dopant concentration, many defects occur such as mother liquid inclusions, parasite crystals and cracks. When the dopant concentration of sulphate reaches a certain value, the ultraviolet transmittance of crystals decreases a lot compared with crystals at low dopant concentration. 相似文献
5.
This paper presents an investigation into the observed enhanced performance that alkali activated ground granulated blast furnace slag (GGBFS) and binary blends offer against sulphate attack. X-ray diffraction (XRD) was carried out to identify and quantify the crystalline phases formed in a wide range of GGBFS and GGBFS-OPC (ordinary Portland cement) blends. Furthermore, specimens were exposed to a sulphate solution to examine the evolution of compressive strength along with identification of activation and/or hydration products. XRD demonstrated that ettringite was completely decomposed into its constituents in the presence of NaOH while quantification ascertained the formation of considerable amounts of hydrotalcite in the activated GGBFS and binary blends. Alkali activated GGBFS and binary blends specimens with higher GGBFS content offered enhanced resistance against aggressive sulphate ions and no significant degradation products were observed in these specimens after 6 months of exposure to sulphate solution. The results demonstrated that hydrotalcite formation may be a major reason for the improved sulphate resistance of alkali activated GGBFS and binary blend pastes with higher GGBFS content. 相似文献
6.
During a 10 years period from 1947 to 1957, a research group at the smelter owned by Orkla Grube-Aktiebolag at Thamshavn, Norway, developed the so-called Pyror Process, the aim of which was to take care of all the valuable components in the copper-bearing pyrite ore being produced at the nearby Lökken mine. The present paper describes pilot plant operation of the crucial step of this process, which is electrowinning of iron from a sulphuric acid solution, using iron starting sheets and lead anodes surrounded by a diaphragm. High purity iron was produced, with a current yield of 85% and a power consumption of 4.25 kWh/kg iron. 相似文献
7.
Dr.‐Ing. W. Dinkel Prof. Dr.‐Ing. F.‐B. Frechen Prof. M. S. Kljavlin 《化学,工程师,技术》2010,82(10):1771-1780
The efficiency of the production of Biosulfid for the elimination of heavy metals or sulphate from industrial wastewater is crucial on the used substrate and is directly related to the recoverability of the carbon source by microorganisms. Easily accessible and easy to use is glycerol as substrate for the sulfate‐reducing bacteria (SRB). Subject of the presented work was the investigation of the anaerobic degradation of glycerol in the batch fermentation. A mixed culture of SRB and a kinetic model approach was determined. 相似文献
8.
聚硫氯化铝和硫酸铝混凝剂使用效果的对比性研究 总被引:2,自引:0,他引:2
本文对新型净水剂——聚硫氯化铝和传统的硫酸铝混凝剂的净水效果进行对比研究。聚硫氯化铝在冬季低水温,高氨氮的原水情况下,不仅提高了出厂水水质,而且节省制水成本.并且简化了生产工艺的操作控制,值得推广。 相似文献
9.
The electrodeposition of Zn–Ni–Co alloys from sulphate electrolytes was studied on steel rod. In order to elucidate the characteristics of the layer formation, a complementary approach was used based on the combination of various electrochemical techniques. The cyclic voltammetry and galvanostatic techniques for electrodeposition, while potentiodynamic polarization resistance and anodic linear sweeping voltammetry techniques were used for corrosion study. Under the examined conditions, electrochemical and surface analysis indicate that the deposition has taken place with the formation of three structures have a composition corresponding to pure Zn, γ-Ni5Zn21 and pure Co phases. The influence of nickel concentration as well as the effect of potential on the surface appearance and the deposits composition was examined. Under these experimental conditions the electrodeposition of the alloys is of anomalous type. The results indicate that the addition of Ni to the Zn–Co alloy, Zn–Ni–Co alloy formed which is more corrosion resistance than Zn–Co alloy. Also, the amount of γ-phase increased and the amount of pure Zn decreased with the increase of nickel concentration in the bath. The corrosion resistance of the zinc–nickel–cobalt alloy had been improved with the more concentration of nickel. The Ni content in the deposition layer had been increased at high deposition potential, whereas, pure Zn deposition had been decreased. 相似文献
10.
关于强碱性季铵型阴离子交换树脂在铀酰的硫酸盐溶液中吸附平衡的研究,虽然有不少报道。但是,对于组成接近铀水冶条件的溶液中吸附平衡的研究是相当不充分的。本文采用化学当量法研究了上述树脂在这种溶液中的吸附平衡。 强碱性季铵树脂从铀酰的硫酸及硫酸钠溶液中吸附UO_2(SO_4)_3~(4-),UO_2(SO_4)_2~(2-),SO_4~(2-)及HSO_4~-四种离子。我们用硝酸钠溶液将它们一起洗脱下来,测定相应组分的含量。由于 相似文献