查询词典 Potassium

A comparison of the degradation effectiveness of PVA by potassium ferrate, sodium hypo-chlorite and combination of them was studied. The effects of potassium ferrate and sodium hypochlorite dosage, oxidation time, initial concentration of PVA and pH on removal rate of PVA were explored.

文章比较了高铁酸钾、次氯酸钠、高铁酸钾与次氯酸钠联用对PVA的降解效果，考察了高铁酸钾和次氯酸钠的投加量、氧化时问、PVA溶液的pH值和初始质量浓度对PVA去除率的影响。

The results show that the degradation effectiveness of PVA was optimum when potassium ferrate and sodium hypochlorite were jointly used as the oxidative agent. The removal rate of PVA and COD was more than 98% and 40% under the conditions that the concentration of PVA was 3.0 g/L and the pH value was 7.2, the dosage of potassium ferrate and sodium hypo chlorite were 0.32 g/L and 3.92 g/L, and the reaction time was 50 min. In the process of united oxidative degradation, the chain of PVA was cut off and many low molecular weight compounds were formed. The main degradation products were carboxyl compounds.

结果表明，用高铁酸钾与次氯酸钠联合氧化PVA时，降解效果最佳；在3.0 g/L，pH值为7.2的PVA溶液中，当高铁酸钾与次氯酸钠的投加量分别为0.32 g/L、3.92 g/L，反应时间为50 min时，PVA的去除率大于98%，COD去除率大于40%；在联合氧化降解过程中，PVA断链成小分子物质，最终降解产物主要为羧基化合物。

In 1L semi-continuous tank reactor,researches the effects of sodium dodecylsulfate,potassium oxalate,mixture of sodium dodecylsulfate and potassium oxalate on formation process of methane hydrate .

在1L的半连续搅拌槽式反应器中，研究了添加剂十二烷基硫酸钠、草酸钾和草酸钾与十二烷基硫酸钠复合对甲烷水合物生成过程的影响。

The procedure is based on the inhibiting effect of ascorbic acid on the enhancing effect of oxalate on the potassium dichromate-potassium iodide／rhodamine6G system.

基于在硫酸介质中，抗坏血酸对草酸根加速重铬酸钾－碘化钾/罗丹明6G这一反应体系具有抑制作用，建立了动力学抑制光度法测定抗坏血酸的新方法。

Its main varieties include potassium sulphate and potassium chloride.

主要品种有硫酸钾、氯化钾等。

For pineapples potassium sulphate is the preferred source of potassium,because it gives better fruit quality.

图左的菠萝每株施用20克硫酸钾，图右的植株没施钾肥。

A white mineral consisting of magnesium sulphate and potassium chloride; a source of potassium salts; used as a fertilizer .

一种矿物，由双钾双镁硫酸盐矿物组成，用作肥料。

Metallic-compound oxidizers, such as potassium nitrate or potassium perchlorate, generate condensed-phase products of particularly high molecular weight, which is rather undesirable.

金属复合氧化剂，如硝酸钾或高氯酸钾，产生凝聚相的产品，尤其是高相对分子质量，这是相当不可取的。

Sodium citrate; calcium carbonate; calcium hydroxide; potassium bicorbonate; magnesium carbonate; ferrous sulphate; Zinc sulphate; copper sulphate; manganese sulphate; potassium iodide; sodium selenite.

柠檬酸钠；碳酸钙；氢氧化钙；碳酸氢钾；碳酸镁；硫酸亚铁；硫酸锌；硫酸铜；硫酸锰；碘化钾；亚硒酸钠。

In this paper,soil pH,the content of organic matter,total nitrogen,potassium and phosphorus,available nitrogen,potassium and phosphorus,water-soluble chlorine of the main soil types was studied in the Yunnan Tobacco-growing areas.

中文摘要：本文系统地研究了云南省植烟区的主要土壤类型的pH值和有机质、全氮、速效氮、全钾、速效钾、全磷、速效磷、水溶性氯含量等理化指标，明确了不同土壤的养分丰缺状况，依据测土配方施肥的要求，制定了合理的施肥对策。

Anna: No, I've got a hangover.

不是，我昨晚宿醉了。

We head into the mountains in Su's new Land Cruiser, stop for lunch at a scenic restaurant and then hang around drinking beer and eating fruit as two of his employees attempt to lure the birds with a tape recording of the fowl's mating call.

我们坐上苏的巡逻车向山顶出发，在一家风景优美的餐馆吃了中饭。然后我们喝着啤酒吃着水果四处逛。