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《盐湖研究》2018,(4)
正Xining, China August4-8, 2019 On behalf of the organizing committee, we are delighterd to invite you to attend the 36th International Conference on Solution Chemistry (36th ICSC) in Xining, China, during Aug.4-8th, 2019.ICSC is a continual and international-influence long history symposium, has been held in odd years for 35 times at various locations arouncd the world, the latest 5 times as follows:2009 31st ICSC,Innsbruck,Austria2011 32nd ICSC, la Grande Motte, France2013 33rd ICSC, Tokyo, Japan2015 34th ICSC, Prague, Czech Republic: 相似文献
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《盐湖研究》2018,(3)
正Xining,China August 4-8,2019 On behalf of the organizing committee,we are delighted to invite you to attend the 36~(th) International Conference on Solution Chemistry (36~(th) ICSC) in Xining,China,during Aug.4-8~(th),2019.ICSC is a continual and international-influence long history symposium,has been held in odd years for 35 times at 相似文献
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《盐湖研究》2018,(2)
正On behalf of the organizing committee,we are delighted to invite you to attend the 36~(th) International Conference on Solution Chemistry(36~(th) ICSC)in Xining,China,during Aug.4-8~(th),2019.ICSC is a continual and international-influence long history symposium,has been held in odd years for 35 times at 相似文献
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东台吉乃尔盐湖卤水的相化学研究（Ⅰ）：25℃等温蒸发实验 总被引：1，自引：4，他引：1
为了研究东台吉乃尔盐湖卤水蒸发时的相化学，确定钾盐、镁盐和锂盐的结晶路线和结晶特性，在实验室内对卤水进行了２５℃等温蒸发结晶过程的研究．实验结果与Ｎａ＋、Ｋ＋、Ｍｇ（２＋）／／Ｃｌ－、ＳＯ—Ｈ２Ｏ五元水盐体系介稳相图进行了比较与讨论． 相似文献
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为了研究东台吉乃尔盐湖卤水蒸发时的相化学，确定钾、镁和锂盐的结晶特性，在实验室内２５℃等温蒸发实验基础上和自然条件下进行了冬夏季日晒蒸发试验．东台吉乃尔盐湖卤水是由氯化钠饱和的多组分复杂体系构成的．卤水中存在的离子是Ｎａ＋、Ｋ＋、Ｍｇ２＋、Ｌｉ＋、Ｃａ２＋、Ｂ３＋、ＳＯ４２－和Ｃｌ－．试验数据与Ｎａ＋、Ｋ＋、Ｍｇ２＋Ｃｌ－、ＳＯ４２－ＫＨ２Ｏ五元体系介稳平衡数据进行了讨论和比较．Ａｕｔｅｎｒｉｅｔｈ相图被用来表示各数据间的关系和证明冬夏季蒸发时结晶行为的差别． 相似文献
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为了研究不同土壤CO2浓度和不同土壤水化学条件下的岩溶作用发生程度,文章对广西桂林地区的土壤CO2浓度、土壤水和石灰岩试片溶蚀速率进行了监测,结果表明：1）该地区土壤CO2浓度具有明显的季节性变化特征,总体上夏季是其他季节的3~5倍,最大值时达到60 899.64 mg/m2,而最小值时仅为5 587.21 mg/m2;2）就相同深度的土壤CO2浓度来说,洼地大于坡地,夏季时洼地比坡地高近20 000 mg/m2,且深层土CO2浓度大于表层土,其平均值比表层土高4 353.54 mg/m2;3）坡地和洼地土壤水水化学指标平均值分别是：pH为7.49和6.41、电导率为300和78 μS/cm、Ca2+为60和15.43 mg/L、 为2.78和0.44 mg/L,坡地处的pH、电导率、Ca2+和 均高于洼地;4）从溶蚀试验说明该地区的岩溶作用发生程度非常明显,说明土壤CO2和土壤水能驱动岩溶作用的发生。 相似文献
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盐湖是我国重要的无机盐矿产资源，盐湖资源的开发与综合利用，是盐湖化学化工的立足点与归宿．本文侧重应用与发展研究就我国盐湖化学化工在“九·五”期间的发展，提出了战役设想．其总体目标是组建盐湖资源综合利用工程技术研究中心，加速科研成果向生产力的转化；使我国盐湖丰产的钾、硼、锂、镁等盐类资源的开发，在采用高新技术、生产高附加值系列产品、建立综合利用示范企业三个方面取得突破性进展．可供制订规划和组织科研项目时参考． 相似文献
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西藏纳木错东部湖水及入湖河流水化学特征初步研究 总被引：12，自引：2，他引：10
对西藏纳木错东部湖区中不同点位的湖水和周边不同位置的入湖河流进行取样,水化学分析结果表明:在主要阴阳离子组成中,Na+和Ca2+分别是湖水和河水的主要阳离子,分别占其阳离子总量的72.4%和71.9%.而湖水和河水的主要阴离子都是Hco3-,分别占其阴离子总量的71.9%和91.2%.从水化学的控制影响因素来看,纳木错湖水主要受蒸发-结晶作用控制,而河水则主要受岩石风化作用影响,其中碳酸盐和硅酸盐的风化影响最为重要,其次是部分蒸发岩的溶解,而区域内湖水蒸发与大气海盐传输也有一定的贡献. 相似文献
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Achim A. Beylich Else Kolstrup Tage Thyrsted Niklas Linde Laust B. Pedersen Lars Dynesius 《Geomorphology》2004,57(3-4):303-319
In Latnjavagge, a 9-km2 drainage basin with homogeneous lithology in periglacial northern Swedish Lapland, water balance, water chemistry and radio magnetotelluric geophysical investigations along selected profiles were integrated with assessment of regolith thickness as well as of ground frost conditions within the basin. In combination with direct field observations, the geophysical profiles demonstrated presence of relatively thin regolith in most of the investigated area, yet in some parts, the bedrock was located deeper and locally was not detected at 40-m depth. TDS values of the water were generally very low. The areas that contributed with the lowest ion concentrations were cold and had a thin regolith, whereas there were higher concentrations in water that drained radiation exposed slopes with earlier thaw and thicker regolith. The low resistivities found along the profiles in the geophysical investigations in combination with the relatively higher TDS values found in related runoff and subsurface water samples showed that larger volumes of ice-rich frozen ground were not found along the investigated profiles in late August. 相似文献
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通过对近年来中国环境化学学科中的环境分析化学、土壤环境化学、水环境化学、大气环境化学和污染生态化学5个大方面研究现状的详细介绍和评述,分析了中国环境化学基础性研究的进展,归纳总结了中国环境化学中已取得的成果及相关的应用,同时通过对目前一些国际上较热门研究内容及研究方向的讨论,指出了中国环境化学学科发展中存在的问题和不足,并对部分相关前沿领域的研究提出了建议。 相似文献
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贡嘎山海螺沟水化学主离子特征及其控制因素 总被引：4，自引：0，他引：4
在系统采集贡嘎山海螺沟水样的基础上,综合运用描述性统计、相关性分析、Gibbs图、阴阳离子三角图和主成分分析法,对水化学主离子特征及其控制因素进行了分析。结果表明:Ca2+和HCO3-分别平均占阳、阴离子总量的78.63%和67.28%;源头区总溶解固体含量(TDS)与雨水的含量相当,全流域TDS平均值为128.36 mg/L;海螺沟流域水化学类型为Ca2+—HCO3-。在源头区,由于冰雪融水对径流量补给量较大,大气降水的输入作用对源头区水体化学离子的组成具有一定的影响。从全流域看,岩石的化学风化是海螺沟水化学主离子来源的主要控制因素,蒸发-结晶和大气降水的作用影响较小。而碳酸盐岩的风化则是海螺沟流域岩石风化的主要类型。 相似文献
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天山奎屯河哈希勒根51号冰川雪坑化学特征及环境意义 总被引：4，自引：0，他引：4
2004~2007年在天山奎屯河哈希勒根51号冰川采集3个雪坑样品。运用相关分析、海盐示踪法等方法,对化学要素的季节变化特征及主要阴阳离子来源进行分析研究。结果表明,雪坑中不溶粉尘和主要化学离子具有明显的季节变化特征;春季期间降雪中粉尘浓度明显高于其他季节。主要离子的浓度在沙尘季节也明显高于非沙尘季节。雪坑中Ca2+是主要阳离子,SO42-是主要阴离子。除NO3-外,雪坑中其他离子浓度之间均存在较好正相关。表明冰川区主要受中亚地区沙尘活动影响;同时雪坑中的离子(尤其是Na+)除陆源矿物粉尘之外,一定程度源于海洋源。 相似文献
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R. Thilagavathi S. Chidambaram C. Thivya M. V. Prasanna K. Tirumalesh S. Pethaperumal 《Natural Resources Research》2017,26(2):119-135
Carbon, which is an essential element found in rocks and minerals, is used by biologically diverse life forms as a source of energy. Natural organic carbon is mainly derived from decomposing vegetation and other organic matter in the soil zone. Dissolved organic carbon (DOC) is an important component in biogeochemical cycling of elements characterized by high susceptibility to leaching. The significance of DOC was studied in layered coastal aquifers of the Pondicherry region during four different seasons. Pondicherry region has varied geological setup ranging from Cretaceous to Recent formations. A total of 324 groundwater samples were collected from various aquifers, namely Alluvium, Tertiary, Cretaceous, and Mixed formations, during different seasons of pre-monsoon, southwest monsoon, northeast monsoon, and post-monsoon. The samples were analyzed for major ions and DOC. The range of DOC in the study area is 0–10 mg/l. Very high DOC concentrations were measured in most of the samples from Alluvium and Upper Cuddalore Formation and in few samples from the Lower Cuddalore Formation. The relationships of DOC with other ions in this study indicate that the hydrochemistry of groundwater was controlled by both aerobic and anaerobic environments in the different formations of the study area. 相似文献
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A CASE STUDY OF A FRESHWATER PEARL MUSSEL (MARGARITIFERA MARGARITIFERA) POPULATION IN CENTRAL SWEDEN
DAVID ENGLUND ANNA BRUNBERG GUNNAR JACKS 《Geografiska Annaler: Series A, Physical Geography》2008,90(4):251-258
Most of the Margaritifera margaritifera populations in Sweden are not reproducing. Land use such as forestry, eutrophication and water regulation for hydropower are commonly reported causes for the absence of reproduction. A brook with a very dense population of pearl mussels has been investigated with regard to the age distribution of the population and their habitat, in order to discover the reason for the absence of reproduction. The population consisted almost entirely of old mussels with very few young ones. The water flow and chemistry of the water are very stable and well buffered, due to a large glacifluvial deposit in the catchment area. The substrate in the stream is favourable and well aerated to a depth of at least 15 cm. Forestry has been practised with care for at least the last 15 years to avoid siltation of the stream sediments. The most likely reason for the lack of reproduction seems to be the water regulation of the main stream introduced 60 years ago, which has left the main stream dry seasonally. This is likely to have affected the population of brown trout which is the host for the first life‐stage of the mussels, the glochidia. 相似文献
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根据区内所拥有的特点:产业结构处于初级变动阶段,自然资源丰富,以及大量处于隐蔽失业的农业剩余劳动力的优势还未发挥,提出了目前本区选择主导产业部门的三个准则,即:资源开发准则、相关效果准则和劳动就业准则。由此判定本区主导产业所得出的结论是:水力发电工业、矿产资源开发业(原材料工业)、农林土特产品加工工业,应成为区内的主导产业部门。 相似文献
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PETER FREDERIKSEN M.Sc. 《Geografisk tidskrift / udgivet af Bestyrelsen for Det Kongelige danske geografiske selskab》2013,113(1):16-24
Frcdcriksen, Peter: Climatic influence on morphology and chemistry of nine loess profiles, Argentine. Geografisk Tiddskrift 81:16–24. Copenhagen, October, 1981. Nine profiles developed in loess under a subtropical, continental climate with a pronounced climatic gradient (udic to aridicj were investigated morphologically and chemically in order to elucidate the influence of climate on soil genesis. Four morphological types developed: a) A1A2BtC-soils, b) ABC-soils, c) A(B)C-soils and d) AC-soils. Some variations could be related to the climatic variation, others were better related to texture or to palaeoclimatic (periglacial) conditions. 相似文献