全文获取类型
收费全文 | 713篇 |
免费 | 50篇 |
国内免费 | 176篇 |
专业分类
安全科学 | 76篇 |
废物处理 | 45篇 |
环保管理 | 55篇 |
综合类 | 349篇 |
基础理论 | 101篇 |
污染及防治 | 222篇 |
评价与监测 | 34篇 |
社会与环境 | 36篇 |
灾害及防治 | 21篇 |
出版年
2023年 | 16篇 |
2022年 | 49篇 |
2021年 | 37篇 |
2020年 | 34篇 |
2019年 | 26篇 |
2018年 | 31篇 |
2017年 | 36篇 |
2016年 | 40篇 |
2015年 | 47篇 |
2014年 | 41篇 |
2013年 | 61篇 |
2012年 | 68篇 |
2011年 | 64篇 |
2010年 | 45篇 |
2009年 | 46篇 |
2008年 | 45篇 |
2007年 | 47篇 |
2006年 | 27篇 |
2005年 | 19篇 |
2004年 | 21篇 |
2003年 | 16篇 |
2002年 | 25篇 |
2001年 | 21篇 |
2000年 | 5篇 |
1999年 | 9篇 |
1998年 | 12篇 |
1997年 | 10篇 |
1996年 | 8篇 |
1995年 | 6篇 |
1994年 | 2篇 |
1993年 | 4篇 |
1992年 | 2篇 |
1991年 | 5篇 |
1989年 | 2篇 |
1988年 | 5篇 |
1987年 | 2篇 |
1984年 | 1篇 |
1982年 | 2篇 |
1973年 | 1篇 |
1972年 | 1篇 |
排序方式: 共有939条查询结果,搜索用时 359 毫秒
741.
成都平原典型区地下水污染时空异质性及污染源分析 总被引:2,自引:0,他引:2
成都平原地下水是该地区生活、工农业生产用水的重要来源,但由于长期过量使用化肥,以及畜禽养殖、乡镇企业及生活污废水的无组织排放,已对该区地下水环境构成了威胁.本研究选取成都平原某典型城镇农村区进行不同时季地下水水质监测分析,并联合ArcGIS空间分析技术、相关矩阵分析和主成分分析(PCA),以揭示研究区地下水水质时空异质性、污染影响因素、潜在污染源及污染源时季变化规律.结果表明,研究区"三氮"(NO~-_3、NO~-_2、NH~+_4)、铁(Fe)、锰(Mn)、氯离子(Cl~-)、硫酸根离子(SO■)存在不同程度的超标,其中,氨氮(NH~+_4)超标最为突出;地下水中氨氮含量及"三氮"之间的转化主要受土地利用类型、地下水铁锰分布及含水层氧化还原条件的影响.PCA结果显示,农业活动、生活污水和工业排放是造成研究区地下水污染的主要影响因素,从春季到夏季地下水污染源由生活污染为主转向农业污染为主,冬季地下水污染源以生活和工业源为主.ArcGIS空间分析和PCA分析的结合,有助于探讨地下水水质及潜在污染源的时季变化规律,可为地下水环境保护、污染控制和减缓方案制定提供理论依据. 相似文献
742.
Jian Chen Guijian Liu Yu Kang Bin Wu Ruoyu Sun Chuncai Zhou Dun Wu 《Environmental geochemistry and health》2014,36(4):735-753
Coal is one of the major energy resources in China, accounting for approximately 70 % of primary energy consumption. Many environmental problems and human health risks arise during coal exploitation, utilization, and waste disposal, especially in the remote mountainous areas of western China (e.g., eastern Yunnan, western Guizhou and Hubei, and southern Shaanxi). In this paper, we report a thorough review of the environmental and human health impacts related to coal utilization in China. The abundance of the toxic trace elements such as F, As, Se, and Hg in Chinese coals is summarized. The environmental problems (i.e., water, soil, and air pollution) that are related to coal utilization are outlined. The provenance, distributions, typical symptoms, sources, and possible pathways of endemic fluorosis, arsenism, and selenosis due to improper coal usage (briquettes mixed with high-F clay, mineralized As-rich coal, and Se-rich stone coal) are discussed in detail. In 2010, 14.8, 1.9 million, and 16,000 Chinese people suffered from dental fluorosis, skeletal fluorosis, and arsenism, respectively. Finally, several suggestions are proposed for the prevention and treatment for endemic problems caused by coal utilization. 相似文献
743.
香港地区2005—2010年VOCs污染来源解析及特征研究 总被引:7,自引:3,他引:7
利用香港地区2005-2010年连续实时监测的挥发性有机污染物(VOCs)组分浓度数据,运用CMB和UNMIX受体模型综合分析了香港地区VOCs主要污染来源及年变化趋势和季节变化规律.结果表明:溶剂使用、机动车尾气排放和液化石油气(LPG)是香港地区主要的VOCs污染源.在2005-2010年间,机动车尾气排放对VOCs贡献呈缓慢增加趋势,溶剂使用的贡献率逐渐降低,天然源的贡献率基本稳定.溶剂使用、机动车尾气和LPG源冬季贡献最大,夏季最低,天然源则在夏季贡献最大.两种模型解析结果有一定的差异,显示源解析结果受较多因素影响.为确保结果的准确性,建议采用两种或以上的模型对受体点数据进行污染来源解析. 相似文献
744.
745.
Chen Pengfei Kang Shichang Tripathee Lekhendra Panday Arnico K. Rupakheti Maheswar Rupakheti Dipesh Zhang Qianggong Guo Junming Li Chaoliu Pu Tao 《Environmental science and pollution research international》2020,27(10):10617-10628
Environmental Science and Pollution Research - Total suspended particles (TSP) were collected in Lumbini from April 2013 to March 2016 to better understand the characteristics of carbonaceous... 相似文献
746.
Han Il Yoo Keunje Kang Bo Ram No Jee Hyun Wee Gui Nam Khan Muhammad Imran Jeong Tae Young Lee Tae Kwon 《Environmental geochemistry and health》2018,40(1):451-460
Environmental Geochemistry and Health - Improper decisions concerning animal carcass disposal sites pose grave threats to environmental biosecurity. However, only a few studies have focused on the... 相似文献
747.
Gu Shiqing Kang Xiaonan Wang Lan Lichtfouse Eric Wang Chuanyi 《Environmental Chemistry Letters》2019,17(2):629-654
Environmental Chemistry Letters - Heavy metal pollution such as water contamination by Pb, Hg, Cu, Cd and Cr ions is induced by rapid urbanization and industrialization and is a major threat to... 相似文献
748.
Han Jingwen Hu Lin He Leqing Ji Kang Liu Yaqing Chen Can Luo Xiaomei Tan Ni 《Environmental science and pollution research international》2020,27(30):37313-37323
Environmental Science and Pollution Research - The preparation, characterization, and uranium (VI) adsorption properties of tri-amidoxime modified marine fungus material (ZZF51-GPTS-EDA-AM/ZGEA)... 相似文献
749.
750.
Young-Yeul Kang Tae-Wan Jeon Woo-Il Kim Sun Kyoung Shin Jin-Mo Yeon Swarnalatha Somasundaram 《Journal of Material Cycles and Waste Management》2014,16(3):566-575
To harmonize with international standards, the Republic of Korea is in the process of converting its current hazardous waste classification system and setting up regulatory standards for all toxic substances present in hazardous waste. Detailed characterization of each form of hazardous waste belonging to five chemical processes and their correlations were studied. In the present work, the concentrations of 13 heavy metals, F?, CN?, 7 PAH compounds, total PCDD/F and 7 PCB isomers present in the hazardous waste generated among chemical processes such as synthetic rubber (SR), man-made fibers (MF), organic dyes and pigments (DP), pharmaceuticals and cosmetics were analyzed along with their leaching characteristics. Comparing all the processes, most of the heavy metal concentrations were high in SR waste. Naphthalene was the dominant PAH in most of the chemical process waste. PCDD/F concentrations of the samples were in the range of 0.001–0.003 ng I-TEQ/g. PCB isomer-101 and isomer-118 were found to be slightly higher than the permissible limit in the SR filter cake sample. SR process wastes doesn’t show any resemblance with the other process waste in either the heavy metals and PAH trend. Each sample from DP and MF were suitable only for hazardous waste landfill. 相似文献