查询词典 hexavalent

After the wastewater was treated by using lead chrome yellow production technology in fact, the concentration of hexavalent chromium was 0.361 nig/L, pH value was 6.24, the concentration of total chromium was 0.963 mg/L and CODer was 67.200 mg/L. The standard exponents of all indices were all teas than 1, so the standard-attainment discharge could be realized.

采用铅铬黄生产工艺实际治理污水后，6价铬浓度为0.361 mg/L、pH值为6.24，总铬浓度为0.963 mg/L，CODcr为67.200 mg/L，各项指标标准指数均小于1，可以实现达标排放。

The letterpress adopts the suitable solid reagent to take the place of the liquid sour and the organic reagent in the Diphenylcarbazide hydrazine intensity of light method (GB7467-87) to mensurate. hexavalent chromium in water.. It has carried out the rapid mensuration of chromium in water using entire solid commixture reagent and it selects affecting condions of the mensuration and maks the optimization .

为应对突发性水污染事故的现场应急监测， 2006年我中心购置的美国哈希便携式DR/2400型多参数仪，该设备适用于地表水和地下水等环境水中铬的测定，是一种准确、灵敏、快速、简便的测定仪，在2006年陕西镇安5-30水污染事故的应急监测中发挥的极其重要的作用，但由于该仪器所使用的试剂是专用的试剂，其价格昂贵、购置麻烦。

In this study, the reduction of hexavalent chromium in aqueous solutions by limonite was investigated. The influences of limonite addition, initial Cr concentration, pH value, reaction temperature, the size of ironstone particles and other ions were tested in batch experiments.

本文采用褐铁矿对水中Cr进行处理研究，考察了褐铁矿投加量、Cr初始浓度、pH值、反应温度、铁矿石粒径大小以及添加不同物质等因素对褐铁矿去除效果的影响。

In this paper,the adsorption behavior of quadrivalent,pentravalent and hexavalent neptunium on silica gel in nitric acid solutions was investigated by batch experiment.

本文研究批式实验条件下，硝酸溶液中Np、 Np和Np在硅胶上的吸附行为。

Hexavalent Chrome Cr-VI when used as a passivate.

作为钝化使用的六价铬。

Hexavalent chromium is the most toxic form, the toxicity of trivalent chromium than 100 times.

六价铬是毒性最大的形态，其毒性比三价铬高100倍。

Causes for the formation of hexavalent Cr in trivalent Cr electroplating process were analyzed.

分析了三价铬镀铬过程中产生六价铬的原因。

The hazards of hexavalent chromium electroplating, and the benefits of trivalent chromium electroplating were analyzed.

分析了六价铬电镀的危害及三价铬电镀的优点，以及三价铬电镀取代六价铬电镀带来的效益。

Trivalent chromium and hexavalent chromium are the predominant chromium species in the natural environment.

其广泛的运用在各大工业中，也因此铬的职业暴露所造成的危害为人所注目。

The research status, related technology and policy of hexavalent chromium electroplating and alternatives to hexavalent chromium electroplating were introduced.

介绍了六价铬电镀及取代六价铬电镀特别是三价铬电镀的研究现状和有关的技术及政策。

For a big chunk of credit-card losses; the number of filings (and thus charge-off rates) would be rising again, whether

年美国个人破产法的一个改动使得破产登记急速下降，而后引起了信用卡大规模的亏损。

Eph. 4:23 And that you be renewed in the spirit of your mind

弗四23 而在你们心思的灵里得以更新