NaCl在混合溶剂（水-乙醇-丙酮）中热力学性质研究          下载免费PDF全文

王卫东 《盐湖研究》2008,16(4)

应用电导法测定了在303 K时NaC l在混合溶剂(水-乙醇-丙酮)中的活度系数,计算了NaC l在混合溶剂中的相对偏摩尔自由能,讨论了NaC l电解质溶液活度系数及其相对偏摩尔自由能随浓度的变化关系。  相似文献   

昌邑市卤水资源总体规划利用探讨          下载免费PDF全文

王铁楼  张艳美  高延航 《山东国土资源》2012,28(8):65-66,70

昌邑市立足卤水资源优势,全面规划、综合开发不断加大监管力度,坚持"全面规划、综合开发、分层实施、重点突破"的原则,全方位引进人才,加强科技横向联合,创造尊重知识、尊重人才,取得经济效益、社会效益、生态效益同步发展,维护了北部沿海经济可持续发展。针对现阶段卤水资源总体规划利用中科技力量投入不足、缺乏新技术、新工艺及高新技术产品和综合利用方面存在的问题,研究分析其成因并提出相应的建议和对策。  相似文献   

珠江口盆地惠州凹陷南部珠江组混合沉积作用   总被引：1，自引：1，他引：0  

昌建波  邹晓萍  余国达  黄映仕 《海相油气地质》2017,22(4)

珠江口盆地惠州凹陷南部珠江组下部广泛发育陆源碎屑岩与碳酸盐岩的混合沉积。通过测井、地震和岩心等资料综合研究了工区混合沉积的岩石学特征、沉积模式和分布规律。研究认为工区混合沉积可分为相缘混合和原地混合,相缘混合主要是在浅海三角洲相和碳酸盐岩台地相边界的结合部位、在低能水动力环境下的细粒陆源碎屑与泥晶碳酸盐的混合沉积,原地混合主要是在三角洲前缘高能水动力条件下的砂级硅质碎屑颗粒与碳酸盐生物碎屑的混合沉积。原地混合沉积对储层的储集性能和渗流特征有显著影响。描述了原地混合沉积的泥岩—碳酸盐岩—砂岩—碳酸盐岩—泥岩相层序,并讨论了陆源碎屑注入、古地形、海平面升降及三角洲迁移等影响透光带范围的因素是如何控制研究区的混合沉积分布的。  相似文献   

Optimization and Modeling of Biogas Production From Green Waste/Biowaste Co‐Digestion Using Leachate and Sludge          下载免费PDF全文

Arwa Abdelhay  Abeer Albsoul  Fatimeh Hadidi  Abeer Abuothman 《洁净——土壤、空气、水》2016,44(11):1557-1563

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正交试验优选天青石矿的捕收剂和浮选条件          下载免费PDF全文

王舒娅  龙光明  祁米香  杨占寿  李加升 《盐湖研究》2010,18(4)

通过L27(9×39)混合水平正交试验确定天青石矿浮选的捕收剂和优化的工艺条件,具有试验次数少、考察因素充分的优点。正交试验的极差分析结果显示,捕收剂种类和捕收剂浓度对回收率的影响最大,原矿来源和捕收剂种类对精矿品位的影响最大。通过试验选择出对天青石矿捕收效果好的捕收剂,即十二烷基硫酸钠、十六烷基三甲基溴化铵和单烷基磷酸酯,初步得到一些关键工艺条件:浮选时间(10～15 min)、叶轮转速(2 340 r/min)、矿浆中固体质量分数(25%)和药剂与矿样的质量比(2∶1000)。  相似文献   

液体矿产资源估算中储卤介质孔隙（给水）度参数的计算分析   总被引：1，自引：0，他引：1       下载免费PDF全文

顾新鲁  于咏梅  李明  刘小星  徐明  曾永刚  韩芳芳 《盐湖研究》2009,17(4):32-36

通过对盐类地层储卤介质孔隙度和给水度的室内测试和野外抽水试验、示踪法测试对比分析,得出比较客观的分析数据,提出推荐的计算参数,为盐类矿产(液体矿)的资源估算评价提供基础依据。  相似文献   

Beach morphology and change along the mixed grain-size delta of the dammed Elwha River, Washington     

Jonathan A. Warrick  Douglas A. George  Guy Gelfenbaum  Peter Ruggiero  George M. Kaminsky  Matt Beirne 《Geomorphology》2009,111(3-4):136-148

Sediment supply provides a fundamental control on the morphology of river deltas, and humans have significantly modified these supplies for centuries. Here we examine the effects of almost a century of sediment supply reduction from the damming of the Elwha River in Washington on shoreline position and beach morphology of its wave-dominated delta. The mean rate of shoreline erosion during 1939–2006 is ~ 0.6 m/yr, which is equivalent to ~ 24,000 m³/yr of sediment divergence in the littoral cell, a rate approximately equal to 25–50% of the littoral-grade sediment trapped by the dams. Semi-annual surveys between 2004 and 2007 show that most erosion occurs during the winter with lower rates of change in the summer. Shoreline change and morphology also differ spatially. Negligible shoreline change has occurred updrift (west) of the river mouth, where the beach is mixed sand to cobble, cuspate, and reflective. The beach downdrift (east) of the river mouth has had significant and persistent erosion, but this beach differs in that it has a reflective foreshore with a dissipative low-tide terrace. Downdrift beach erosion results from foreshore retreat, which broadens the low-tide terrace with time, and the rate of this kind of erosion has increased significantly from ~ 0.8 m/yr during 1939–1990 to ~ 1.4 m/yr during 1990–2006. Erosion rates for the downdrift beach derived from the 2004–2007 topographic surveys vary between 0 and 13 m/yr, with an average of 3.8 m/yr. We note that the low-tide terrace is significantly coarser (mean grain size ~ 100 mm) than the foreshore (mean grain size ~ 30 mm), a pattern contrary to the typical observation of fining low-tide terraces in the region and worldwide. Because this cobble low-tide terrace is created by foreshore erosion, has been steady over intervals of at least years, is predicted to have negligible longshore transport compared to the foreshore portion of the beach, and is inconsistent with oral history of abundant shellfish collections from the low-tide beach, we suggest that it is an armored layer of cobble clasts that are not generally competent in the physical setting of the delta. Thus, the cobble low-tide terrace is very likely a geomorphological feature caused by coastal erosion of a coastal plain and delta, which in turn is related to the impacts of the dams on the Elwha River to sediment fluxes to the coast.  相似文献   

Influence of thin liquid films on polar ice chemistry: Implications for Earth and planetary science     

C.S. Boxe  A. Saiz-Lopez 《Polar Science》2009,3(1):73-81

The polar snowpack (and sea-ice) plays a major role in affecting overlying boundary layer chemistry and has only recently come to light. Furthermore, the understanding of this system and its importance is steadily growing. Investigations done thus far, nonetheless, examined the subsets of the polar environment as an uncoupled system. Analogous to some materials, the surface of snow/ice exhibits thin liquid layers (e.g., the quasi-liquid layer (QLL) and brine layer (BL)). This paper gives an overview of thin liquid films and illustrations of their function in Earth science. The impact of such films in polar science (i.e., polar snowpack photochemistry) is discussed within the context of how field data has been elucidated through laboratory data and modeling techniques. Specifically, what laboratory and modeling investigations have revealed about the effect of thin liquid layers on constraining field observations and, more importantly, the physicochemical mechanisms that govern the behavior of trace gases within the snowpack (and sea-ice) and how they are released from the polar snowpack. Current and future impacts of these findings are discussed, along with putative implications of the effect of thin liquid films in planetary science.  相似文献   

四川盆地地下卤水勘探开发前景展望   总被引：9，自引：2，他引：7       下载免费PDF全文

林耀庭  陈绍兰 《盐湖研究》2008,16(1):1-7,21

四川盆地地下卤水分布广泛,点多面广,品质优良,资源丰富,开发历史悠久。卤水含有K+、Br-、I-、B3+、Li+、Sr2+等多种有用组分,为重要的化工原料水。进一步加强四川盆地卤水资源研究,对卤水有利构造或地段进行勘探开发,必将为振兴四川卤化工业,实施西部大开发战略作出贡献。  相似文献   

山东沾化滨海地区浅层地下卤水矿层特征及形成条件     

张新文  胡松涛  胡彩萍  张学斌 《山东国土资源》2009,25(10):28-31

山东沾化滨海地区地下卤水为古浓缩海水封存而成。浅层地下卤水主要赋存在40 m深度以上的粉砂和粉土层中,垂向上分为2个矿层,总厚度9.9-33.7 m,矿化度50.0-99.7 g/L,水位埋深1.2-4.3 m,单位出水量10.42-58.94 m3/（d.m）,富水性中等,动态较为稳定。卤水开发利用应合理规划,避免资源浪费,注重综合利用和环境保护。  相似文献