深入分析高矿化水中氟化物的检测方法

在本文中,笔者就氟离子选择性电极法检测高矿化度水样中氟化物含量其结果偏低的问题进行深入分析,具体通过实验选择合适方法,以此提高水质氟化物检测的精度,在这个基础上指出水样中矿化度对氟化物检测精度的影响和在进行检测时必须注意的事项,以供参考。

高矿化水垂向分布特征及腐蚀性研究——以天津市滨海新区为例

建筑物基础承载着房屋自重和建筑物所有外加荷载,如果经常受到具有腐蚀性水和土的侵蚀,结构安全度和耐久性就会降低,严重时甚至会发生基础失效的事故。天津市滨海新区地下咸水分布广,厚度大,矿化度高,其腐蚀性对构筑物的危害非常大,研究高矿化水垂向分布特征及腐蚀性情况是十分必要的。为研究滨海新区高矿化水在垂向上的分布情况,选取3个典型场地作为研究区,进行土壤全盐量的垂向定量分析,以此间接反映浅层地下水矿化度的变化情况,同时在垂向采用分段取水的方式研究高矿化水腐蚀性垂向分布特征。

高氟水、高矿化水的形成原因浅析——以四子王旗北部为例

内蒙古自治区四子王旗北部地下水资源贫乏,且水质普遍较差,矿化度、氟化物等普遍超标,利用已有水文地质勘查资料,研究当地高氟水、高矿化水的形成机理,可以为寻找水质较好地段和较好层位提供借鉴。本文从介绍影响当地地下水水质的气象、水文、地形地貌、地质、水文地质等多要素出发,在分析研究区水质变化规律基础上,论述了高氟水、高矿化水的形成原因。

粗棉油、高矿化高盐分水及其联合对大鼠亚急性毒作用的病理组织学及超微结构研究

本文报告经染毒试验证明,粗棉油对雄性大鼠生殖功能及睾丸生精细胞有明显的损害作用,对雌鼠生殖系统未见明显的影响。10g/L高矿化高盐分水与粗棉油联合染毒其毒作用与粗棉油单独的毒作用相近,未发现增毒作用。结果提示:新疆伽师“不育不孕”的原因与粗棉油关系密切,而与不良水质无明显联系。

Seasonal variability of salinity budget and water exchange in the northern Indian Ocean from HYCOM assimilation

Based on HYbrid Coordinate Ocean Model (HYCOM) assimilation and observations, we analyzed seasonal variability of the salinity budget in the southeastern Arabian Sea (AS) and the southern part of the Bay of Bengal (BOB), as well as water exchange between the two basins. Results show that fresh water flux cannot explain salinity changes in salinity budget of both regions. Oceanic advection decreases salinity in the southeastern AS during the winter monsoon season and increases salinity in the southern BOB during the summer monsoon season. In winter, the Northeast Monsoon Current (NMC) carries fresher water from the BOB westward into the southern AS; this westward advection is confined to 4°-6°N and the upper 180 m south of the Indian peninsula. Part of the less saline water then turns northward, decreasing salinity in the southeastern AS. In summer, the Southwest Monsoon Current (SMC) advects high-salinity water from the AS eastward into the BOB, increasing salinity along its path. This eastward advection of high-salinity water south of the India Peninsula extends southward to 2°N, and the layer becomes shallower than in winter. In addition to the monsoon current, the salinity difference between the two basins is important for salinity advection.

Formation and Transportation of High-Salinity Water Produced in Polynyas South of the St.Lawrence Island

The authors studied variations of temperature and salinity in seawater under sea ice using hydrologic data collected from polynyas south of the St.Lawrence Island during March of 2008 and 2009.The results indicate that the high-salinity water found during the cruises of 2008 and 2009 was due to the formation of polynyas.The salinity observed in 2008 was higher than that in 2009 as a result of higher salt production in 2008.The spatial distributions of high-salinity cores differed between the two cruises.In March 2008, a southeastward flow was formed under the persistent northerly wind in the observation region, which transported the high-salinity water produced by the polynyas to the southeast.The similar flow, however, did not exist in March 2009 because the northerly wind over the study area was interrupted by a southerly wind.Accordingly, the polynyas and the high-salinity water pro-duced by them existed for a short time.As a result, the high-salinity water in 2009 did not spread very far, and stayed within the polynyas.In addition, during the 2009 cruise, two stages of observations in the polynyas showed the core of high-salinity water was shifted to the southwest of the St.Lawrence Island.This result suggested that a southwestward flow might have existed in the area at the onset of the northerly wind, which was consistent with the alongshore and/or offshore flows caused by the northerly wind.

Volumetric Variation and Rheology of Cement Based Mineral Additions （Blast Furnace Slag and Silica Fume）

The partial substitution of clinker by mineral additions offers very significant, both economical and environmental benefits. This adds value to industrial waste, and contributes also in the preservation of natural resources, like clay and limestone, as well as the reduction of greenhouse gas emissions （CO2）. This study is interested in the simultaneous effect of BFS （blast furnace slag） and SF （silica fume） on setting time and water requirement of cement paste. The volumetric variations are tested in mortars, prepared in the same mixture of pastes, and the tests indicate that the addition of slag increase the fluidity, reduce the water demand, shrinkage and expansion, compared to the mortar, containing ten percent （10%） of Silica Fume only. The images of pastes obtained by SEM （scanning electron microscopy）, are indicated an improvement of the microstructure of the paste with a large amount of slag, which leads to improve durability.

国外盐水在农业中的利用

水资源是保证国民经济发展的必要物质条件之一。许多位于干旱地带的国家,水资源供应不足成为阻碍国民经济发展的主要因素。随着工农业用水和城市生活供水的日益增长,淡水资源供不应求的现象,已成为许多国家所面临的严重问题。 自然界的水资源是非常丰富的,全世界的水储量约145亿亿立方米。但是,在全世界的总水量中,绝大部分是海洋的盐水,大陆上有不少地区也分布有矿化水。

低渗砂砾岩储层三元孔隙结构特征及其渗流机理与改善水驱对策

针对低渗砂砾岩与砂岩储层产能测试结果差异大的问题,以北部湾盆地乌石凹陷流沙港组低渗砂砾岩储层为主要研究对象,通过设计室内岩心实验开展了微观孔隙结构、微观渗流能力、微观渗流特征和改善水驱提高采收率策略研究.研究发现,乌石凹陷流沙港组低渗砂砾岩储层具有三元孔隙结构特征,大孔喉和微小孔喉更加发育,导致“高气测渗透率、低液测渗透率、低驱油效率”的渗流特征和“大孔喉富含注入水、中吼喉富含剩余油、微小孔喉富含原始束缚水”的剩余油微观分布特征,提高微观波及系数、增加中孔喉动用率是提高采收率的关键,建议采用注低价高矿化水转变润湿性和不稳定注水发挥渗吸作用的策略改善水驱效果、提高最终采收率.