NaCl在DMF和1,2-丙二醇混合溶剂中电导的研究

在283~308K温度范围内测定了NaCl在DMF和1,2-丙二醇混合溶剂中的电导率,根据公式求得NaCl的摩尔电导率值,应用Kohlrausch经验规则,使用Origin软件进行线性拟合,作图外推求得NaCl在DMF和1,2-丙二醇混合溶剂中的无限稀释摩尔电导率λ0值,并讨论了NaCl溶液的电导率、摩尔电导率、无限稀释摩尔电导率与温度和浓度的关系。     

杂卤石溶解性能的测定

通过测定25℃，50℃，75℃时液相K^ ，Ca^2 ，Mg^2 ，SO4^2-等组成浓度随时间的变化，考察杂卤石在水中的溶解行为，测试得25℃，50℃，75℃条件下杂卤石中K^ 在水中的平衡浓度分别为19．13，21．29，36．77(mg／m1)。K^ 溶解平衡浓度随着温度的升高而增大。实验研究25℃条件下杂卤石在CaCl2溶液中的溶解行为。在5％和10％CaCl2溶液中K^ 的平衡浓度分别为25．65，35．24(mg／m1)。明显大于在水中的平衡浓度。表明CaCl2对杂卤石具有明显的增溶作用，可作为杂卤石的良好溶浸剂。实验结果对不溶性或难溶性的钾矿资源的开发利用具有理论参考和实际应用价值。     

Dechlorination of trichloroethylene in solution over supported nano zero valent Fe and Cu/Fe bimetal on exfoliated graphite

Degradation of organic halides by reductive dehalogenation promoted by zerovalent metals is a very active research area. The use of nano-sized particles of zero valent iron （ZVI） or bimetallic combinations of ZVI currently attracts the most attention due to their high surface areas and high reactive activity. The introduction of second catalytic metals, such as Pd, Pt, Cu, or Ni, results in an even higher dehalogenation rate. The supported zero-valent iron materials have higher activity and greater flexibility for environmental remediation applications than other forms of ZVI. Nano ZVI supported on micro-scale exfoliated graphite was prepared by using KBH4 as the reducing agent in the H2O/ethanol solution of Fe^2＋ in the laboratory. Then the ethanol solution of Cu^2＋ was added to the fleshly prepared wet supported nano ZVI. The Fe/Cu bimetallic particles supported on the graphite were obtained because of the reduction and deposition of Cu on the Fe surface. The TEM image showed that iron particles were highly dispersed on the surface of graphite. In this study, supported zero valent Cu/Fe bimetallic nanoparticles were used for the dehalogenation of trichloroethylene （TCE） in batch experiments. The dechlorination rate of supported zero valent Fe/Cu bimetallic nanoparticles was greater than the supported nano ZVI. Supported Cu/Fe bimetal with 4 wt% Cu had the fastest dehalogenation rate than that with different content of Cu. When the nana FeO dosage was 5 g/L in the dehalogention system, 8 mg/L of TCE was completely dechlorinated within 4 hours. Increasing or decreasing the FeO dosage, the dechlorination rate could be worse. When the concentration of Fe^2＋ was 0.05 mol/L during the preparation by KBH4 reduction, the nano Cu/Fe particles exhibited the spheral shape with 50-80 nm in size. When the concentration of Fe^2＋ was higher （0.2 mol/L）, the nano particles were the palpus structure and had the poor dehalogenation effect on the TCE.     

溶液中Pb~(2+),Cd~(2+)和Cu~(2+)离子对羟基磷灰石吸附Zn~(2+)行为的影响

本文研究了在Pb~(2+),Cd~(2+)和Cu~(2+)等离子共存的条件下,羟基磷灰石对溶液中Zn~(2+)离子的吸附行为,讨论了Pb~(2+),Cd~(2+)和Cu~(2+)离子对Zn~(2+)吸附行为的影响;比较了羟基磷灰石对上述离子的吸附能力。实验结果表明:随着Cd~(2+)离子浓度增大,对Zn~(2+)的去除率逐渐增高,羟基磷灰石对Cd~(2+)和Zn~(2+)离子无吸附选择性。而随着Cu~(2+)离子浓度增大,对Zn~(2+)的去除率急剧下降,表现出明显的吸附选择性。另一方面,对Zn~(2+)的去除率几乎不随Pb~(2+)离子浓度的变化而改变,这是由于羟基磷灰石对这两种离子的吸附行为与机理不同。上…     

溶液除湿空调系统模拟方法及应用

溶液除湿空调系统由于在改善室内空气品质、利用低温余热、高效蓄能和可实现温、湿度独立控制等方面的突出优点，已经引起广泛的关注，并逐渐应用于工程实践中。本文以上海某生态示范建筑中采用的热泵驱动的溶液除湿空调系统为例，介绍了这种系统的工作原理，并建立了系统模拟的数学模型。通过模拟结果与实测结果的比较，验证了数学模型的可靠性，并应用系统模型对溶液除湿新凤机和再生器的性能进行了深入分析。     

辽三小佟家堡子金矿岩石地球化学及成矿条件研究

辽东小佟家堡子金矿为隐伏的大型微细浸染型金矿。矿体寄主岩石以变粒岩为主,次为大理岩、云母片岩。不同类型容矿岩石对比研究表明,具有良好渗透性,同时又是成矿溶液物理障和化学障的岩石是细脉浸染状矿床的最有利容矿岩石。围岩与矿石的地球化学特征综合研究反映了成矿溶液早期为氧化、偏酸性,晚期逐渐变为还原、偏碱性。矿化元素组合、矿化过程微量元素变化特征以及成矿溶液的演化等表明该矿床为浅成低温热液成矿。     

对标定硝酸银标准溶液的一点认识

＠张兆富￥山东省泰安水文水资源勘测局１问题的提出根据ＧＢ１１８９６－８９,用硝酸银滴定法测定水中氯化物含量时,ＡｇＮＯ３标准溶液（ｃ≈０．０１４１ｍｏｌ／Ｌ）的标定方法是：取２５００ｍＬＮａＣｌ标准溶液（ｃ＝０．０１４１ｍｏｌ／Ｌ）于２５０ｍＬ锥形瓶中,...     

庚村和黄双岭萤石矿同位素地球化学特征

文章详细研究庚村和黄双岭萤石矿的同位素分析结果,得出如下主要结论;成矿溶液来源于当地中生代大气降水：Ｓｒ,Ｂａ,Ｃａ来源于强蚀变的围岩;矿液中存在有ＨＦ和ＳｉＦ４;成矿过程氢,硫同位素出现交换动力学效应,庚村和黄双岭萤石矿的成矿年龄分别接近８４Ｍａ和１０７Ｍａ。     

关于建立成矿溶液配合物体系Eh—pH图的研究

Ｅｈ－ｐＨ图是研究成矿溶液的重要手段之一。在传统元素－水体系的Ｅｈ－ｐＨ图的基础上,笔者提出和研究了成矿溶液中配合物体系的Ｅｈ－ｐＨ图的建立方式,为成矿溶液的理论模拟和成矿作用的研究提供了新的途径。