Adsorption of zinc on manganite(γ-MnOOH): particle concentration effect and adsorption reversibility

The adsorption and desorption processes of Zn(Ⅱ) on τ-MnOOH as a function of particle concentrations (Cp) were studied. An obvious Cp effect was observed in this adsorption system. The degree of adsorption hysteresis increased greatly with the increasing of Cp, indicating that the extent of the real metastable-equilibrium states deviating from the ideal equilibrium state was enhanced with the increasing of Cp. The Cp-reversibility relationship confirmed the metastable-equilibrium adsorption (MEA) inequality (Pan, 1998a), which was the core formulation of the MEA theory. Because the MEA inequality was based on the basic hypothesis of MEA theory that adsorption densitιy ι is not a state variable, the Cp-reversibility relationship gave indirect evidence to the basic hypothesis of MEA theory.     

国产防锈水对威斯塔大鼠致癌性研究

对使用国产防锈水(主要成分为亚硝酸钠和三乙醇胺)的一个工厂进行肿瘤流行病学调查,发现该厂人员恶性肿瘤发病率略有增加。经长期给大白鼠饮用防锈水实验证明,该法可导致大鼠胰腺腺泡增生和不典型增生并能诱发出对照动物所没有的胰腺癌,同时还可引起胃粘膜的增生和胃乳头状瘤。     

工业废水处理水回用技术的研究进展

阐述了工业废水处理回用技术研究的重要意义及近年来的一些进展，尤其是物理技术和化学技术方面。研究进展说明新材料，新工艺的应用，以及各种技术的组合应用，提高了工业废水处理水的回用率。     

等速电泳法测定水中Cl^—,NO2^—,I^—含量

等速电泳是利用电化学进行分离和分析的新技术。1985年.J.Vacik报道了井水和废水中 Cl~-、NO_3~-、SO_4~(2-)的测定。J.C.Reijenga报道了重水中金属离子的测定。本文对前导电介质、尾随电介质、仪器参数等方面作了探     

垃圾浸出液对填埋场周围水环境的研究

通过对广州两个生活垃圾卫生填埋场周围水环境长达５年的追踪监测，证明垃圾浸出液对地面水的污染主要是ＢＯＤ，ＣＯＤ、氮和磷，对地下水的污染主要来自难降解的有机污染物和微量重金属元素等。     

天下奇水出九寨

“黄山归来不看山，九寨归来不看水”。说九寨沟的水清、纯、净、碧、透、秀、美，都不足道出九寨水的精魂，九寨的水美在奇，且奇甲天下。１１８个海子个个皆奇九寨沟一带古称“翠海”，“海峡长数十里，水光浮翠，倒映林岚”。因翠海境内的山沟谷地有九个藏族村寨而得名。九寨沟的“翠海”与美妙动人的神话故事相连。传说在远古时代，九寨沟少树缺水，干旱贫瘠。一位名叫达戈的男神与一位美丽的女仙沃诺色嫫自由恋爱，达戈为表达情意揽九天风云为心爱的沃诺色嫫精心磨制了一面镜子，准备送给心上人打扮所用。不料女仙沃诺色嫫接镜时一不小…     

Observation of atmospheric nitrous acid with DOAS in Beijing, China

Measurements of nitrous acid （HONO） and nitrogen dioxide （NO2） in Beijing City have been performed by means of a developed differential optical absorption spectroscopy （DOAS） system based on photodiode array （PDA）, during the autumn of 2004. HONO and NO2 were simultaneously identified by their characteristic absorption bands in the spectral region between 337 nm and 372 nm with high sensibility and time resolution. The concentrations of HONO exhibit obviously diurnal variation with a nocturnal maximum and a daytime minimum. The highest HONO value up to 11.8 μg/m^3 was observed during the night of 2/3 September. Possible sources of the observed HONO were discussed. Good correlation to NO2 indicates that NO2 is a main source component. The measurement also shows direct emission of HONO is an imnortant source in strongly polluted urban area.     

德兴地区超大型铜、金矿床成矿控制因素及其模拟实验

在深入研究德兴地区超大型铜、金矿成矿地质背景的基础上 ,从构造地球化学方面着重研究德兴地区超大型铜、金矿床成矿的控制因素 ,并进行构造控矿模拟实验。研究结果表明 ,德兴地区超大型铜、金矿床的形成除因其处于特殊的构造位置 ,具有特殊的地质背景及成矿环境外 ,还与多种地质作用、多种控矿因素耦合作用及地质构造长期发展演化使成矿物质多次叠加富集密切相关