微波高压提取快速测定饲料含氟量的探讨

采用微波高压制样技术,快速提取饲料中的氟元素,结合氟离子选择性电极标准添加和电位极差测试方法,能够快速、准确地测试饲料中的含氟量     

Cyanex有机膦类萃取剂在贵金属溶剂萃取中的研究和应用

介绍了近年来Cyanex有机膦类萃取剂在贵金属溶剂萃取中的研究状况及应用进展，展望了该类萃取剂在贵金属分离提取中的应用前景。     

Influence of solvents on extraction of U(Ⅵ) by N,N'-didecanoylpiperazine

Extraction behavior of N, N'-didecanoylpiperazine (DDPEZ) for U(Ⅵ)in a series of solvents from aqueous nitric acid media was investigated for the first time.The dependence of distribution ratios on the concentration of aqueous nitric acid.extractant and temperature has been discussed. The increasing sequence of extractiveability of DDPEZ is given: chloroform, carbon tetrachloride, dimethylbenzene, toluene,benzene.``     

武钢6#高炉煤气洗涤水处理新思路

武钢6#高炉煤气洗涤水在已有的经验基础上,引进了项目总承包方式的运作。总结了药剂选择、使用量的确定、工业性试验的效果、半年多来的实际运行成果,为外协技术项目今后采用总承包方式的运作提供了初步的经验。     

北京城市供水安全及对策研究

“十一五”期间是首都经济社会快速发展的关键时期，也是应对水资源紧缺、保障供水安全的关键时期。确保首都供水安全是北京水务工作的第一要务，北京市水务局针对城市供水存在的主要矛盾和问题，对城市供水水源、水质水量、水厂、管网、设施等情况进行了全面调查，确定了工作思路，并据此提出了保障城市供水安全的目标和措施。     

Monitoring non-carbonated (‘still’) mineral waters for aerobic colonization

Fifty samples each of two leading brands of French, non-carbonated (‘still’) mineral waters, packed in plastic bottles, were stored in the dark for one month at approximately 20°C to allow marked proliferation of their autotrophic microbial flora. Upon completion of this challenge test 1250 ml per bottle were filtered through five membranes, which were subsequently cultured on 1/10 strength nutrient agar for 48 h at a temperature favouring the growth of thermotrophic organisms only, i.e. 42 ± 0.5°C. The numbers of colonies per one litre were below 10³ in all samples and did not exceed 200 in 56–80%, depending on the brand. Identification of the isolates demonstrated strong inhibition of the psychrotrophic. Gram-negative types, predominating in the association flora of stored still waters and preponderance of Gram-positive, catalase-positive, facultatively anaerobic cocci. Consequently, a Reference Value for the thermotrophic autotrophic colony count per 1 ml in still, commercial mineral waters of the order m = 1 and M = 5 seems justified. It is emphasized that, besides examining for these trivial organism, the usual tests for marker bacteria (Escherichia coli and Lancefield group D streptococci) and Pseudomonas aeruginosa should always be carried out.     

马钢A/OO生物脱氮装置的试运行

介绍了马钢A/OO生物脱氮装置的工艺流程、工艺条件及影响因素,探讨了A/OO生物脱氮工艺试运行中存在的问题和解决措施。     

钇、钪分离工艺的新进展

本文简要介绍中国科学院长春应用化学研究所近年来在钇、钪分离工艺研究方面的新进展。     

谈井下矿山二次破碎裸露爆破方法

井下矿山二次破碎裸露爆破可采用聚能药包和水封聚能药包破碎大块，聚能药包能改变药柱某个方向的猛度，提高炸药能量利用率，水封爆破利用了炸药的猛度和一部分爆力作用，从而有效地利用了炸药本身的能量，降低了爆破危害。     

用熔融还原的方法从浸钒渣中提镓——碳饱和情况下的熔融还原过程

用通用旋转组合设计的方法得到了浸钒渣在饱和碳的熔融还原过程中镓的还原提取率与温度,时间及CaO的加入量关系的非线性数学模型。用非线性优化的方法并综合考虑Fe,Mn的回收,得到了最优的工艺条件及结果;用Langmuir—Knudsen方程推算了镓在铁液中的理论挥发量与时间的关系,与由本模型得到的关系式是一致的。