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从环境资源的价值论出发,介绍了环境资源的界定,陈述了环境资源的内容与性质;阐释了环境资源的利用和开发势必要产生正、负价值,进而构成环境资源的本身价值、增加价值和损失价值;论证了环境资源的整体价值是其本身价值、增加价值、损失价值相互作用和相互影响的耦合价值;探讨了环境资源耦合价值与环境资源利用模式的关系;提出只有环境资源耦合价值大于0才是环境资源可利用的经济发展运行模式. 相似文献
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为更好地服务于四川自然资源资产管理和统一履行全民所有自然资源资产所有者职责,结合四川省情,针对四川省矿产资源资产开展了价值核算体系的研究,重点了探索社会价值与生态价值的核算方法。在社会价值方面,首次对矿产资源的社会价值形成系统分析,按照矿产资源对社会发展的作用范围和作用方式进行了梳理,得到了社会价值的普适划分方法,该方法不仅可用于划分矿产资源社会价值,也可用于其他资源;对于战略价值部分,首次将战略矿产资源的优势和紧缺属性进行了综合考量,并从资源禀赋、供需关系、国际形势等方面给出了一套技术可行性较高的核算方法。在生态价值方面,认为恢复费用法应用矿产资源生态价值估算具有可行性相对较高,并采用恢复费用法建立了核算体系。 相似文献
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水资源价值是水资源可持续利用的基础,在传统的水利工程经济评价中,由于受“水资源是取之不尽用之不竭”的思想束缚,根本没有考虑水资源本身价值,导致水利工程经济评价结果失真或者可行性结论出现偏差.将水资源本身价值纳入水利工程经济评价范畴,探讨了水资源价值对水利工程经济评价的影响,结果表明,考虑水资源本身的价值,同不考虑资源本身价值相比,会对分析结果产生巨大影响,甚至可能与原有的结论相反 相似文献
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地下水资源价值的影响因素众多,价值系统具有模糊性和复杂性。建立了北京市第四系地下水资源价值评价指标体系,运用模糊数学模型对北京市地下水资源价值进行了综合评价,对合理制定水价具有一定的借鉴意义。 相似文献
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地质遗迹资源评价指标体系 总被引：18，自引：0，他引：18
虽然最近几年国内外都在大力推进地质公园的申报建设工作, 但对地质遗迹资源调查评价的基础研究工作较少, 本文在对地质遗迹资源评价内容进行详细归纳总结的基础上, 将其评价指标体系划分为资源景观价值和资源开发利用条件两大类, 其中资源景观价值包括科学价值、美学价值、历史文化价值、稀有性、自然完整性、经济价值等6个指标; 资源开发利用条件包括区域经济水平、与中心城市距离、可进入性、基础服务设施、环境容量及地域类型组合等6个指标.利用层次分析法(AHP) 对各个指标体系的权重进行计算, 指出资源景观价值权重为70%, 资源开发利用条件权重为30%. 相似文献
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农用地转用生态补偿价格评估实证研究 总被引：2，自引：0，他引：2
农用地价值是农用地功能与效益的综合体现,但由于对农用地价值缺乏完整认识,导致我国农用地大量被低价转为建设用地。以吉林省四平市为例,从完全资源价格角度出发,探讨了农用地生态价值构成,并利用资源环境经济学的影子价格法、市场替代法、碳税法对其生态价值进行评估。 相似文献
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我国海洋生态系统服务功能及其价值评估研究计划 总被引：24，自引：0，他引：24
国家海洋局于2005年启动了为期5年“海洋生态系统服务功能及其价值评估”研究计划。该计划的目标是建立具有我国海洋生态特征,适应我国社会经济发展水平的海洋生态系统服务功能定量模型和服务价值计算方法,并基于GIS技术开发生态系统服务价值评估系统,应用于评估渤海、黄海、东海和南海四大生态系统的服务价值和11个沿海省市区的近海服务价值,同时评估赤潮、病原生物和外来种导致的海洋生态系统服务价值损失,为实现人海和谐的海洋开发产业布局和用海活动提供定量评估技术支持,为基于生态系统的海洋管理提供理论支撑。目前,该计划已经建立了我国海洋生态系统服务功能分类体系、服务功能量化指标和服务价值计算指标体系,完成评估软件系统的设计。 相似文献
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国有企业的改制是国家产业结构的调整、国有资产的保值增值等的必然,改制最核心的问题在于企业真实价值确认。而企业真实价值确认审计,是价值确认中的重要一环。分析了帐面价值、无形资产、评估方法等对企业价值评估的影响,总结了价值审计中应重点关注的帐面资产、无形资产以及管理层收购等方面应注意的问题与应采取的措施。 相似文献
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利用菱镁矿尾矿制备纳米级片状氢氧化镁 总被引：1，自引：0，他引：1
为了对菱镁矿尾矿进行综合回收利用,文中对利用菱镁矿尾矿制备纳米级片状氢氧化镁工艺进行了研究。通过对菱镁矿尾矿的煅烧、与硫酸反应制备硫酸镁以及纳米氢氧化镁的制备工艺和性能表征,成功制备了原始粒径为纳米级、颗粒呈片状的氢氧化镁粉体。利用轻烧镁粉制备硫酸镁溶液的工艺是将轻烧镁粉与水配制成浆料,然后与酸进行反应。反应后控制体系的pH值在5~6,然后进行过滤。制备氢氧化镁的工艺条件为:Mg2+初始浓度为22.75g/L,反应温度为50℃,反应时间为5min,原位表面改性剂为钛酸酯偶联剂YB-502,用量为氢氧化镁质量的1.5%。制得的氢氧化镁结晶情况良好,为片状纳米粉体,其片径100nm左右,片厚10nm左右。氢氧化镁的二次颗粒粒径为d50=0.95μm,d97=3.53μm。 相似文献
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Geochemical behaviour of some heavy metals of the Grot flotation tailing, Southeast Serbia 总被引：1，自引：1，他引：0
Bo?idar V. Djoki? Vidojko Jovi? Milun Jovanovi? Aleksandra ?iri? Dragan Jovanovi? 《Environmental Earth Sciences》2012,66(3):933-939
Grot tailing dump has the highest altitude of all tailing dumps in the Republic of Serbia. About 5.5 million tons of hydrocycloned
sand was deposited in the tailing dump. This material was formed by flotation processing of ore from the Blagodat ore field.
Vegetation was not developed in any part of the tailing. Minerals determined by X-ray diffraction analyses of representative
samples form the tailing are quartz, clay minerals, calcite, feldspars, hematite, siderite, pyrite, sphalerite, galena and
chalcopyrite. No regularities were noticed in their quantitative distribution. Statistical analysis of chemical fluctuations
of lead, zinc, copper, arsenic and manganese concentrations showed that those with the highest concentrations are usually
found on the central plateau. Lead displays the largest concentration range in the whole tailing. Maximal concentrations are
found on the central and minimal in the south-western plateau. Zinc concentrations are up to 5,000 mg/kg, except in the central
plateau where they reach extreme several times higher values. Copper concentrations are increased in the central plateau.
In other parts of the tailing, concentrations are uniform and several times lower. Arsenic concentrations are mostly uniform,
with the exception of extreme values in the north-western parts of the central plateau. Manganese shows uniform concentrations,
somewhat increased on the south-eastern plateau. Chemical heterogeneity of the tailing material was influenced by the chronological
discontinuity of the deposition and resedimentation. Resedimentation was the main cause of the fluctuation in the concentrations
of the most mentioned heavy metals. 相似文献
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This study evaluates the pollution load on a creek based on the physicochemical and mineralogical properties of old tailings. The Sanggok mine is one of the largest lead–zinc producers in the Hwanggangri mining district, Republic of Korea. The vertical profile of the old tailings in the mine area can be divided into three units based on color change, and mineralogical and textural variations, as well as physical and chemical properties. Unit I (surface accumulation and oxidized heterogeneous tailing soil) has lower pH and higher Eh than unit II (originally unoxidized dumped tailing soil) and unit III (pebble-bearing bottom soil). The conductivity data indicates that unit I and II have very high values compared to unit III and basement. The mine area consists mainly of carbonate rocks; however, mineral constituents of tailing soil and sediments near the mine were mainly composed of quartz, mica, feldspar, amphibole, calcite, dolomite, magnesite, and clay minerals. Units I and II are characterized by high abundances of siderite, locally pyrite, and dolomite. Precipitates in the mining drainage mainly included: smectite, illite, berthierine, quartz, siderite, hexahydrite, and Ca-ferrate. Among the separated metallic minerals, tailing soils and sediments of highly concentrated toxic metals are found: some pyrite, arsenopyrite, chalcopyrite, sphalerite, galena, malachite, goethite, various hydroxide, and uncertain secondary minerals. Units I and II are characterized by relatively high concentrations of Ca, Fe, Mn and low contents of Al, Mg, K, Na, Ti, rare earth elements (REEs) that correlated with the proportion of secondary minerals. Potentially toxic elements such as Ag, As, Cd, Cu, Pb, Sb, and Zn are highly enriched in the upper two units. This metal concentration can be influenced by changes in the depth because of oxic and suboxic zonal distribution. The removal zone (unit I) has probably migrated below the elevation of the maximum enrichment layer due to deepening of the oxic/suboxic boundary. In most of the materials, the enrichment index is higher than 3.62. The highest value of 42.55 is found in the oxidation surface soils of the tailing pile. An average enrichment index of the profiles and precipitates are 27.62 and 22.62, respectively. Rocky basement soils have an average enrichment index of 6.63, which is influenced by overlying the tailing pile. The water quality and habitat of the Sanggok creek are severely polluted. Polluted surface water may also negatively impact the agricultural soil and groundwater. 相似文献
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本文以油酸钠作为捕收剂,研究了磷酸氢二钠、柠檬酸和硅酸钠等抑制剂对粉石英与红柱石浮选分离效果的影响.结果表明,磷酸氢二钠是红柱石与粉石英浮选分离的一种优良的抑制剂;在其最佳浓度0.47×10-2 mol /L,浮选液pH值为8.5时,粉石英与红柱石浮选回收率差高达47.86％.红外光谱及Zeta电位分析结果表明,油酸钠对红柱石兼有物理和化学吸附作用,对粉石英仅有物理吸附作用,因而对红柱石有更强的捕收能力;磷酸氢二钠对粉石英表面起解吸作用,能有效抑制粉石英起浮,从而实现粉石英与红柱石的分离. 相似文献
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铁晶砂胶结新型岩土相似材料的研制及其应用 总被引：13，自引：4，他引：9
根据地质力学模型试验的相似原理,经过大量力学试验,研制出一种新型铁晶砂胶结岩土相似材料。该材料由铁矿粉、重晶石粉、石英砂、石膏粉和松香酒精溶液按规定配比均匀拌和压实而成,其中铁矿粉、重晶石粉和石英砂作为主料,松香酒精溶液作为胶结剂,石膏粉作为调节剂。材料力学参数测试表明：该材料具有重度高、力学参数变化范围广、性能稳定、价格低廉、干燥快速、制作工艺简单、无毒无害等显著优点,可用来模拟从软岩到硬岩的大部分岩体材料。将铁晶砂胶结岩土相似材料应用于沪―蓉―西高速公路大型分岔隧道三维地质力学模型试验研究,有效地揭示了分岔隧道围岩的力学变形特性。 相似文献
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余志伟 《华东地质学院学报》2000,23(1):28-30
介绍改性粉石英填充PE膜的试验研究.试验表明改性粉石英填充PE薄膜,具有较好的工艺性能,薄膜力学性能优良,生产成本低.证明改性粉石英用作PE薄膜的填料在技术、经济上完全可行. 相似文献
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Zengguang Xu Yang Yang Junrui Chai Xuemin Yang Yuan Qin Yanlong Li 《Environmental Earth Sciences》2017,76(20):707
To study the seepage characteristics of tailing sand, an indoor sand column test was performed with three kinds of tailing sand obtained from Henan and Shaanxi provinces, China. River sand, quartz sand, and glass beads were also employed for comparison. Using the nuclear magnetic resonance, the researchers studied pore size distribution and permeability under different hydraulic gradients. The chemical composition and particle morphology were analyzed by energy-dispersive spectrometry and X-ray diffraction. The results were as follows. (1) The three kinds of tailings sand are small in diameter, mainly in the range from 0.15 to 0.5 mm. Their diameter distribution is more concentrated than river sand. The surface of tailing sand is rough. As for chemical composition, tailing sand contains many kinds of metal elements. (2) With hydraulic gradient increasing, the micropores in the tailings samples become fewer, the larger pores grow in number, and the peak of the pore size distribution changes to the left; blocking is more obvious. (3) The small pores gradually decrease during the test. Under the influence of groundwater pressure, the smaller gravel could migrate and block tiny pores. The structure of particle arrangement becomes denser. Therefore, it would prevent the seepage liquid from passing through the medium. The permeability coefficient K decreases. 相似文献
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通过对江西宜黄县新源铁矿尾矿库的工程地质勘察,进行了钻孔揭示及大量钻孔原状土样的试验,对尾矿库作了稳定性分析,以便安排尾矿排放和采取安全营运措施。勘察结果认为,尾矿坝已运行多年,未见有塌陷和异常现象,质量应属良好,但尾矿坝坝顶标高已接近最终设计标高,有可能失稳。尾矿库稳定性及扩容的可行性必须经设计论证。并提出了各类沉积尾矿的物理力学参数建议值。 相似文献
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石英结晶学优选与应用 总被引：10，自引：0，他引：10
石英集合体的结晶学优选可由位错滑移、双晶滑移、定向成核与生长等形成,其中位错滑移是塑性变形岩石中石英结晶学优选产生的最重要的机制。影响变形石英结晶学优选的因素有温度、应变速率、应变、差应力、水、复矿物岩石中各种矿物间的相互作用、初始结晶学方向等。系统总结了石英晶体变形与滑移系,结晶学优选的测量与表达,多种条件下石英的结晶学优选,以及在判断剪切方向、计算运动学涡度、判定变形温度、分析变形历史等方面的应用,并认为应用石英组构作运动学和动力学解析时需与其它微观、宏观现象相结合。 相似文献