若尔盖县生活垃圾填埋场渗滤液回喷处理设计     

陈雪  张建强  李兵  毛科 《地质灾害与环境保护》2008,19(3)

结合当地蒸发量远大于降雨量的特点,在若尔盖县生活垃圾卫生填埋场渗滤液污染控制中采用了渗滤液循环回喷处理技术,可实现在填埋运营期渗滤液不外排,同时,结合工程设计,介绍了渗滤液产量的计算方法、处理系统的组成、回喷系统的设计以及构筑物设计等情况.  相似文献   

整顿整合资源 科学循环发展——灵宝市矿产资源开发秩序整顿工作受到国务院验收组充分肯定     

沈亚明  白玉珍 《河南地质》2008,(8):30-31

7月18日,国土资源部副部长汪民率领国务院九部委整顿和规范矿产资源开发秩序检查验收组,深入灵宝市检查验收整顿和规范矿产资源开发秩序工作。检查验收组一行首先深入灵宝市金源矿业有限责任公司第二分公司,实地查看整顿规范矿业秩序及企业生产情况。在查看整顿规范工作档案资料,听取灵宝市整顿和规范矿产资源开发秩序工作汇报,并与有关乡镇、矿业企业负责人和矿区群众代表进行座谈后,检查验收组一行对灵宝市整顿和规范矿产资源开发秩序工作取得的成效给予了充分肯定。  相似文献   

鄂尔多斯高原地下水流系统的多层结构循环模式—来自深孔中PACKER系统分层水头测定的证据   总被引：1，自引：0，他引：1  

赵振宏  王冬  陶正平  李瑛 《地质通报》2008,27(8):1131-1137

地下水流系统和循环模式分析是研究地下水形成机理的基础,对正确认识和评价地下水资源具有重要意义。鄂尔多斯高原在含水系统和众多地下水排泄区的控制下,形成了多个不同规模、不同循环深度、相互独立的地下水流系统。PACKER系统分层试验测定的不同深度水头的数据证明,鄂尔多斯高原地下水流系统存在托斯多层水流模式,区域性水流系统一般包含浅循环、中间循环和深循环3个循环系统。浅循环系统的发育深度在200m以内,深循环系统的发育深度大于400m。  相似文献   

天然气水合物与全球气候变化   总被引：2，自引：0，他引：2  

吴庐山 《南海地质研究》2008,(1):86-98

天然气水合物作为21世纪的重要能源已受到广泛认可和高度关注。与此同时,作为一个重要的气候致变因素,在地质历史时期中天然气水合物在自然条件下的突然分解释放甲烷气体可能造成全球气候变暖、地质灾害和生物灭绝等负面影响仍不容忽视。本文通过分析天然气水合物的稳定性与分解释放甲烷气体、天然气水合物对气候的反馈机制以及天然气水合物的分解在地质历史时期中对全球气候变化的可能影响,如新元古代“雪球”地球的终结、古新世一始新世极热事件和第四纪冰期后气候快速变暖等,对天然气水合物在全球气候变化过程中的作用进行了探讨。  相似文献   

RFID系统中基于ISO 18000-6的信号编解码设计     

李鹏  高远  黄志敏  沈少武  郭再春  徐斌富 《测绘地理信息》2008,33(5):29-31

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新地球观   总被引：11，自引：0，他引：11  

张昀 《地球科学进展》1992,7(1):57-64

One of the most important achivements on science in 20th century is the new recognition on the Earth:the Earth,out of the other planets, exhibits very peculiar features because it has an extremely complex and active periphery part (surfacial layers). This periphery part is an open system sustained by inputting solar energe , which is captured , transfered and stored by life. Through the system , cyclings of matters and energe flow are driven and regulated by life activities. This system is self-equilibrated,self-controlled and far away from astrophysical and thermodynamic equilibria mainly because of life and life activities.
Development of human calture influences increasingly on流Earth's periphery system , at last , the natural biosphere that has existed for 3 billion years on the Earth's surface will inavoidably be replaced by so called "noosphere",which is man一reconstructed,man-controlled and unstable system. Thus the fate of the Earth,to a great extent,will be determined by the direction of human calture evolution.
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区域复合生态系统分析及其可持续发展对策     

杨国华  周永章  郑奔 《云南地理环境研究》2006,18(6):26-29

从系统物质循环角度分析了人类社会-经济-自然复合生态系统不可持续发展的原因是由于大量生产-大量消费-大量废弃的线性生产和消费模式耗用了大量资源，产生太多的废弃物，破坏了复合系统正常的物质代谢。提出系统调节，实现系统可持续发展的途径，包括控制人口增长，适度消费；调整复合系统生产链的数量结构和比例关系；建立协调的结构网络关系，构建循环型社会。  相似文献   

2006年中国农学会学术年会暨循环农业与新农村建设高层论坛在北京召开     

楼惠新 《地理学报》2006,61(6):F0002-F0002

2006年中国农学会学术年会暨循环农业与新农村建设高层论坛于2006年4月21-24日在北京召开，与会代表有农业部危朝安副部长、九三学社中央贺铿副主席、中国科协程东红书记等260人。这次会议围绕中央今年提出的建设社会主义新农村这个主题，大家认为“三农”问题的核心是农业资源节约和高效利用。建设社会主义新农村关键在“建设”。  相似文献   

Measurement of the total nitrogen in lake sediments： Comparison and its environmental significance     

Wei JIANG Xinqing LEE 《中国地球化学学报》2006,25(B08):12-12

Nitrogen cycle is an important bio-geochemical process in the environment. Measurement of the total nitrogen （TN） is a routine experiment in agriculture, biology and environmental sciences. The Kjeldahl method （KM） and elemental analyzer method （EA） are both commonly used to determine TN. Total nitrogen by EA is the sum of nitrate （NO3）, nitrite （NO2）, organic nitrogen and ammonia. Total nitrogen by KM （TKN） is made up of both organic nitrogen and ammonia. A comparative study focused on the two methods is conducted by analysis of TN in 97 samples from the sediment sequence of Gouchi, a salt lake in North China. KM presents a higher degree of accuracy than EA with a standard deviation of 0.007 vs. 0.024. With the presence of nitrate and/or nitrite nitrogen, however, measurement by KM is considerably lower than that by EA. Therefore, for samples from lake sediment sequences or soils in North China, KM is inapplicable to determining TN because of usually high contents of nitrous salt. Despite the inconsistency, use of both methods to the same samples makes sense in reconstructions of climatic and environmental changes from lake sediments. In Lake Gouchi, the contents of nitrate and nitrite nitrogen vary from 1.40% in the lower part of the sequence to 14.77% in the uppermost part, suggesting a gradual evolution process from a fresh water lake to the present-day salt lake.  相似文献   

Speciation of adsorbed arsenate on the surface of hydrous iron oxide     

Yongfeng JIA Xin WANG George Demopoulos 《中国地球化学学报》2006,25(B08):35-35

Adsorption of arsenate on hydrous iron oxide is an important process controlling geochemical cycling of arsenic in environment as well as the fate of arsenic-bearing mining wastes. The widely accepted view on the mechanism of adsorption is that arsenate is adsorbed via bidentate binuclear inner-sphere complexation. In this study, we characterized the arsenate-hydrous iron oxide sorption solids synthesized at pH=3-8 using Fourier transformed infrared spectroscopy （FTIR） and X-ray diffraction （XRD）. It has been determined that poorly crystalline ferric arsenate developed on the surface of iron oxide when arsenate was sorbed at acidic pH, while at alkaline pH the adsorption of arsenate was via bidentate complexation.  相似文献