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运用氧化物酸碱性Zo标度值和离子极化力两参数,提出一种用于计算无机含氧酸盐生成热的经验公式:-ΔH^of=a(ΔZo)^2 bΔ(Z^*/R)^z C。用该式计算了53种含氧酸盐的生成热,计算值与实验值符合得很好。 相似文献
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Dissolved inorganic carbon and its isotopic differentiation in cascade reservoirs in the Wujiang drainage basin 总被引:3,自引:0,他引:3
Three cascade reservoirs, built in different periods of time in the Wujiang drainage basin, were investigated in this study. Samples were taken at the surface and also at 20, 40, 60, 80 m depths in front of the dams in April, July, October of 2006 and January of 2007. Chemical parameters were calculated and the concentrations of dissolved inorganic carbon [DIC] and its isotopic composition (δ613CDIC) were determined. In surface waters, the δ613CDIC values are high in summer and autumn and low in winter and spring, while the DIC concentrations are relatively low in summer and autumn and relatively high in winter and spring. In the water column, the DIC concentrations increase while δ613CDIC values decrease with water depth. DIC in various reservoirs is significantly different in isotopic composition from that in natural rivers, but is close to that in natural lakes. In addition, in surface waters, the δ613CDIC values tend to become lower whereas the nutrition level tends to become higher with increasing age of the reservoirs. The conclusion is that after dam blocking, changes took place in the hydrochemical properties of river water, and the impounding rivers developed toward lakes and swamps. In addition, differentiation in DIC isotopic composition may be used to some extent to trace the evolution process of a reservoir. 相似文献
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原子特征参数 (δ′i)被定义为 :δ′i =Zi·Xpi2 · (ni- 1) - 1.由δ′i 建构无机分子的连接性指数 ( mL) ,其中 :0 L =Σ(δi′) 0 .5,1L =Σ(δi′·δj′) 0 .5.( 0 L) 2 与 33种过渡元素卤化物的ΔfH 的 R 为 0 .9692 ,( 1L) 0 .5与 2 0种碱金属卤化物的ln( 1/ U)的R 为 0 .994 8,均优于文献方法 相似文献
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为了寻找新型的二氧化氯活化剂,对一种在接近中性条件下进行活化的无机物MY进行了研究,确定了其最佳活化配比,并研究了促进剂二氯异氰尿酸钠对活化性能的影响,同时对稳定荆进行筛选,通过正交试验和加速稳定性试验确定了一元中性二氧化氯固体制剂的最佳配比为无水硫酸钠27.8%,二氯异氰脲酸钠7.2%,亚氯酸钠26.0%,活化剂MY 39.0%. 相似文献
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所谓水泥石灰稳定土,是由水泥、石灰、土三种无机物有机组合,通过专门的设备拌和、摊铺到碾压成型而形成的一种路用承重层材料。 相似文献
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鼻腔为万物之门户,却被世人所忽略,当鼻腔在吸收空气中氧的同时,无条件地吸收着千万种有机物的侵蚀和无机物的伤害。鼻炎患者鼻腔存在着大量的病源性微生物,通常与空气中的尘埃混杂一起存在于鼻腔中。其中鼻病毒和鼻腔杆菌对鼻粘膜的毒害最大。目前人们对鼻腔的呵护还未象保护牙齿那样进行严格的清洁。 相似文献