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广西平果铝厂平南赤泥堆场的岩溶渗漏研究与治理 总被引：2，自引：0，他引：2
为了治理广西平果铝矿氧化铝厂赤泥堆场的岩溶渗漏的环境问题,阐述了堆场的岩土工程地质条件、岩溶发育特征与规律及岩溶渗漏的途径与方向。对岩溶渗漏对周围环境的影响作了评价,并提出了岩溶渗漏的防治措施。研究认为,赤泥堆场的岩溶渗漏治理措施是切实可行的,治理效果是良好的。 相似文献
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薛志红 《水文地质工程地质》2001,(5)
罗国煜教授等撰写的《城市环境岩土工程》 ,从一个新的高度对城市建设中所涉及的主要环境岩土工程问题进行剖析 ,并以优势面学术观点为主线 ,兼容并蓄各家之长进行深入系统的研究 ,努力揭示这些问题的内在联系和发生发展规律 ,得出了许多新的认识和有益的结论。这对于解决我国城市建设环境岩土工程问题具有十分重要的意义。本书由南京大学出版社出版发行 ,联系电话 :0 2 5 359692 3。帐号 :0 662 10 1490 0 10 34 (户名 :南京大学出版社 )《城市环境岩土工程》$南京大学出版社@薛志红… 相似文献
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人与环境的和谐共处是当今社会可持续发展的重要内容,面对城市固体废弃物激增所带来的人与环境之间的各种问题,卫生填埋法作为最广泛也是最彻底的固体废弃物处理方法得到了越来越多的关注和研究。卫生填埋场的建设与环境岩土工程领域内的诸多方面密切相关,针对卫生填埋场的建设中涉及到的环境岩土工程问题,在依据已有资料概括介绍国内外相关发展现状的同时,结合西安地区的特点,在填埋场场址和类型选择、废弃物工程性质指标、填埋场防渗处理、填埋场沉降计算和边坡稳定这5个方面对西安地区城市固体废弃物卫生填埋场建设中的环境岩土工程问题进行了论述,提出了相应建议,展望了研究方向。 相似文献
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本文是由我国地质工程领域的4个学会共同举办的第三届全国岩土与工程大会学术总结报告。
会议显示了我国岩土与工程领域研究工作的4个特点:(1)基础研究加强。出现一系列特殊土测试研究成果,汶川地震后岩土体动力学成为新的热点,岩土体基本性质和行为研究引起更多关注;(2)工程诱发的地质灾害受到重视;(3)岩土与工程新技术迅速发展;(4)岩土与工程教育、培训、技术标准建设受到广泛重视。
同时指出,动力学、多场耦合、高地应力、工程与地质环境相互作用下的岩土体基本性质与行为,以及专门的岩土与工程问题的研究将进一步受到重视; 岩土与工程测试、监测和加固技术将获得进一步发展。 相似文献
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交通岩土工程信息系统在国民经济和交通工程建设中发挥着重要作用.利用地理信息系统(GIS)技术和计算机技术构建交通岩土工程信息系统是近年来国内交通领域内的研究热点和前沿之一.江西省交通岩土工程信息系统采用组件式地理信息系统(GIS)和计算机技术,并从系统的软硬件设计、系统总体结构设计、系统的功能设计等方面.探讨了江西省交... 相似文献
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第四届地质(岩土)工程光电传感监测国际论坛显示了国内外地质和岩土工程光电传感监测领域研究工作的以下几个特点:(1)理论研究不断加强,出现了一系列新的基础性研究成果; (2)开发出越来越多的适用于地质和岩土工程监测的新型传感器,这些传感器在精度、稳定性、可靠性、可集成性等方面具备了独特的优势; (3)分布式传感技术在地质灾害与岩土工程安全监测方面的应用日益增多,已开发出一些针对具体工程的监测系统; (4)全分布式和准分布式光纤传感技术已逐渐渗透到水利水电、交通、消防、电力、国防等相关行业,技术标准、监测规范的制定进一步受到重视。未来的研究建议包括以下几个方面:(1)研发具有优越性能价格比的全分布式光纤传感解调技术; (2)特种地质和岩土工程光纤传感器及其现场安装工艺的研究; (3)海量分布式光纤感测数据的传输和处理技术; (4)基于分布式监测技术的地质灾害预警和岩土工程安全评估理论和方法研究。 相似文献
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渗漏问题一直是赤泥堆场的一个难题。在岩溶地区的赤泥堆场,因岩溶裂隙管道的存在,渗漏的产生是必然的,而防渗处理又是一个比较复杂、系统的工程。而对堆存强碱性(溶液的pH值≥12)液、固体物的堆场,若发生废液外渗,其对环境的危害及影响都较大。对赤泥堆场岩溶渗漏通道采取垂直帷幕注浆、场内封堵落水洞、赤泥铺盖等综合防渗措施进行治理,通过灌浆前后地层的渗透性对比和泉点水质监测,结果表明防渗治理的效果很好。 相似文献
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水泥系结合料稳定赤泥应用于公路工程是消纳大宗工业固体废料赤泥的新技术路向。目前,路用稳定赤泥耐久性能的研究滞后于工程实践,为对此研究,进行稳定剂配比研究、干湿循环与冻融循环试验和微观试验。结果表明:水泥、石灰和磷石膏结合料稳定赤泥的标准强度最小为3.6 MPa,可满足路面稳定基层承载标准,且5级循环后试样质量损失趋于稳定。磷石膏比例由8%减小到2%,5级干湿循环后强度降低至1.69~3.69 MPa,强度损失率(BDR/%)达到35.1% ~85.4%,5级冻融循环后强度降低至2.63~3.70 MPa,强度损失率(BDR/%)达到54.82% ~79.79%,表明硫激发耦合效应的磷石膏掺量不宜超过赤泥用量的2%。此外,压汞试验研究揭示干湿与冻融循环导致试样大孔隙(直径>0.1 μm)占比增加,并与强度呈显著负相关。综合承载性能与耐久性能试验,使用稳定赤泥替代公路道面水稳材料是可行的,最优配比为赤泥︰水泥︰石灰︰磷石膏=100︰8︰2︰2。基于循环强度衰减特征,工程实践中施工期限制、早期养护质量等至关重要,且应严格控制稳定赤泥中的磷石膏掺量。 相似文献
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赤泥的变形-强度特性与结构性关系的研究 总被引：13，自引：2，他引：11
制铝工业排出的大量固体废料?--赤泥具有较强的结构性,笔者对其结构性及变形–强度特性进行了研究。根据饱和原状赤泥样及扰动样固结排水三轴剪切试验资料,用土力学方法分析了变形–强度特性与结构性之间的关系,探讨了结构性参数随轴应变及固结压力变化的规律。研究表明：（1）对浸水反应比较迟钝的饱和赤泥,用三轴试验条件下各应变水平原状样与扰动样的主应力差之比所表示的结构性定量化参数,来研究结构性对变形强度的影响可以得到良好的规律性。（2）结构性参数对固结周围应力反应敏感,不同固结周围压力和剪切应力对结构性的影响,主要发生在低应变区段内。(3)赤泥的变形–强度特性与其在形成过程中的固结应力大小及龄期长短没有直接的规律性关系,而与其在物理化学作用下结构性的强弱相关。 相似文献
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Utilization of red mud as a stabilization material for the preparation of clay liners 总被引：3，自引：0，他引：3
Red mud is a waste material generated by the Bayer Process widely used to produce alumina from bauxite throughout the world. Approximately, 35% to 40% per ton of bauxite treated using the Bayer Process ends up as red mud waste. Because of storing issues, the waste negatively affects the environment. To solve this problem, it is essential to investigate different uses for red mud waste. The potential use of red mud for the preparation of stabilization material is presented in this study. This study examines the effects of red mud on the unconfined compressive strength, hydraulic conductivity, and swelling percentage of compacted clay liners as a hydraulic barrier. The test results show that compacted clay samples containing red mud and cement–red mud additives have a high compressive strength and decreased the hydraulic conductivity and swelling percentage as compared to natural clay samples. Consequently, it is concluded that red mud and cement–red mud materials can be successfully used for the stabilization of clay liners in geotechnical applications. 相似文献
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环境岩土工程是近年来发展起来的一门新兴学科。随着城市化的进展,环境岩土工程问题已成为制约徐州市国民经济发展的重要因素。本文根据已有资料和工程实践,阐述了徐州市存在的地面塌陷、固体废弃物、矿坑突水、崩塌滑坡、深基坑开挖等城市环境岩土工程问题,并提出了相应的防治对策。 相似文献
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环境地质工程：环境地质学与工程的结合 总被引：2，自引：0，他引：2
本文就环境地质及环境地质工程的基本涵义,环境地质工程的特性、内容及分类等进行了探讨。环境地质工程是指防治地质灾害和其他不良的环境地质问题的工程技术体系,它是以环境地质学为理论基础,是环境地质学与工程的结合。它不是一项简单的、规范的工程,而是一项具有公益性、复杂性和综合性特点的系统工程。环境地质工程包括区划与管理,以及勘测、设计、施工、监测、监理。其中监测和监理贯穿于勘测－设计－施工全过程。文中还提 相似文献
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A. Cruceanu R. Zăvoianu O. D. Pavel M. Florea L. Mara 《International Journal of Environmental Science and Technology》2018,15(4):895-908
This work investigates the catalytic properties toward sulfide oxidation in wastewater for three composites which are functional materials obtained from red mud waste following its neutralization, chemical activation and functionalization of the iron by treatment with disodium salt of ethylenediaminetetraacetic acid, trisodium citrate or a combination of these two organic ligands. X-ray diffraction and diffuse reflectance Fourier transformed infrared spectroscopy characterizations indicated the coexistence of the corresponding iron chelates phases along with hematite the main crystallographic phase from red mud. The most active catalyst was the red mud-derived material obtained by functionalization with the mixture of ethylenediaminetetraacetate and citrate ligands. The results obtained after its testing in multiple reaction cycles showed that the decrease in conversion after 10 reaction cycles was less than 5%. Considering the results of diffuse reflectance ultraviolet visible narrow infrared spectroscopical analysis which revealed that this solid contains species with lower bond strength, it has been inferred that both the higher catalytic activity, as well as the enhanced stability, is directly related to the versatility of the active species. 相似文献
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拜耳法赤泥矿物成分特殊,力学性能较差,平果铝赤泥堆场利用拜耳法赤泥筑坝在国内尚属首次。通过对拜耳法赤泥颗分情况、矿物及化学组成、物理力学特性等进行试验研究,认为赤泥中Fe2O3含量较高、粒径较细且属于级配不良的土;结合平果铝赤泥堆场目前的运行情况,分析了赤泥堆场目前运行时存在的排水系统、赤泥固结等几个问题,指出了赤泥堆场堆存后期有可能由于赤泥排水缓慢而导致堆场底部赤泥长期被水浸泡,从而对堆场的稳定性造成一定影响。 相似文献
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D. A. Rubinos G. Spagnoli M. T. Barral 《International Journal of Environmental Science and Technology》2016,13(3):773-792
Red mud residue from alumina production has been proposed as an alternative liner material. The chemical and environmental compatibility of red mud upon exposure to representative organic (methanol, heptane, TCE, and acetic acid) and inorganic liquids (CaCl2 and seawater) was studied. Chemical compatibility assays comprised Atterberg limits and sedimentation and hydraulic conductivity tests for red mud interacted with the chemical liquids, whereas the environmental compatibility was assessed through the leaching of metals from red mud as permeated with the liquids. Methanol greatly reduced the plasticity at concentrations ≥80 % by volume, but it did not increase the hydraulic conductivity of compacted red mud. High concentrations (≥60 % v/v) of acetic acid reduced the plasticity and enhanced the sedimentation of red mud. Conversely, acetic acid concentrations ≤40 % caused dispersion, but damaged the hydraulic properties and structure of red mud. The percolation of a pH 2 acetic acid solution did not adversely affect the hydraulic performance of the red mud liner. Neither diluted heptane nor TCE affected the red mud. However, pure organics suppressed the plasticity and induced aggregation of red mud, suggesting a great detrimental effect on red mud liners. The red mud exhibited great resistance to attack by inorganic salt solutions. Some concerning leaching of metals (primarily Al and Cr) occurred as water, acetic acid, and CaCl2 solutions percolated through red mud, but effluent metals concentration quickly dropped to permissible levels. In general, red mud exhibited a high resistance against chemical attack; nevertheless, exposure to low-dielectric-constant organic chemicals should be avoided. 相似文献
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S. Lakshmi Narayanan G. Venkatesan I. Vetha Potheher 《International Journal of Environmental Science and Technology》2018,15(8):1687-1698
In the present experimental study, solid waste was used as an adsorbent and the effectiveness of the adsorbent was increased by novel treatment methods. Red mud, acid-treated activated red mud and iron oxide-coated acid-treated activated red mud were used for the removal of lead (II). The structural and functional groups were identified to confirm the removal of lead (II) by powder X-ray diffraction and Fourier transform infrared spectroscopy analyses. The enhancement of surface area was confirmed by Brunauer–Emmett–Teller analysis. Batch adsorption experiment was also conducted, and various parameters such as the effect of adsorbent dosage, pH, contact time and initial ion concentration were analyzed and reported. Adsorption equilibrium data were investigated using Langmuir, Freundlich and Dubinin–Radushkevich isotherm models with three parameters, and the rate of reaction was examined through kinetic models. The results indicate that in particular a novel modified form of red mud, namely iron oxide-coated acid-treated activated red mud was well fitted in lead (II) removal compared with reported adsorbents. The Langmuir isotherm shows that the maximum adsorption of adsorbate per gram was greater than other adsorbents (27.02 mg/g). In Freundlich isotherm, the Freundlich constant n values lie between 1 and 10 indicate the favorable adsorption. The calculated n values for normal red mud, acid-treated activated red mud and iron oxide-coated acid-treated activated red mud were found to be 1.9, 2.1 and 2.0 respectively. The correlation coefficient value was higher and the rate of reaction follows the pseudo-second-order kinetic model. 相似文献
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对福建沙县钾长石粉合成的13X沸石及其与取自山东铝业公司的赤泥混合使用时除砷的效果和适宜条件进行实验。结果表明，以单一的13X沸石为吸附剂时，改变沸石用量和溶液的酸度均不能有效去除砷；赤泥和沸石混合使用时对低浓度砷（〈5mg／L）具有良好的去除效果。适宜的吸附条件为赤泥用量2g／L，沸石用量1．5g／L，pH值约为8，平衡时间1h。实验表明，赤泥在混合吸附剂除砷过程中起着重要的作用，沸石与赤泥的合理混合使用，对于含砷重金属废水处理具有重要意义。对可能的机理进行了探讨。 相似文献