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461.
土壤有机质测定方法的进展 总被引:16,自引:0,他引:16
对土壤有机质测定的3种主要方法及特点和应用范围进行了论述和评价。认为上壤有机质测定方法改进的目标不仅仅是简便、快速、廉价,还应包括无污染。 相似文献
462.
污泥缺氧好氧消化的减量研究 总被引:2,自引:0,他引:2
实验主要进行缺氧好氧工艺在不同运行条件下消化效果的研究;在常温和中温下,与传统污泥好氧消化处理的效果对比,并进行pH等控制参数的统计规律分析,提出优化处理工艺条件,也为污泥缺氧好氧消化工艺的设计、运行管理和进一步研究提供可靠的理论依据。 相似文献
463.
Ge Shen Junjun Ma Jianrui Niu Ruina Zhang Jing Zhang Xiaoju Wang Jie Liu Jiarong Gu Ruicheng Chen Xiqing Li Chun Liu 《Frontiers of Environmental Science & Engineering》2023,17(5):64
464.
Gu Zhaolin Han Jie Zhang Liyuan Wang Hongliang Luo Xilian Meng Xiangzhao Zhang Yue Niu Xinyi Lan Yang Wu Shaowei Cao Junji Lichtfouse Eric 《Environmental Chemistry Letters》2023,21(2):725-739
Environmental Chemistry Letters - Policies and measures to control pandemics are often failing. While biological factors controlling transmission are usually well explored, little is known about... 相似文献
465.
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467.
本文主要针对雾霾天气背景下大气环境监测质量的提升路径展开深入研究,先阐述了大气环境监测质量的提升重要性,比如有利于提高环境污染的防治水平、有利于不断提高城市环境规划水平等,然后重点提出了几点可行的提升路径,主要包括制定大气环境监测质量保障体系、加强环境质量监测网络建设、加强大气环境监测采样管理、加强3S技术的应用、加强监测监察联动协调机制、扩大大气环境质量评价范围等,确保监测数据与完整性和准确性相符,确保大气环境监测质量的稳步提升,以创建节能减排、生态环保的节约型社会。 相似文献
468.
有机氯农药(Organochlorine pesticides,OCPs)曾在全世界被大量使用,即使禁用多年,仍能在各种环境介质中被广泛检出,对生态环境和人体健康存在着潜在的威胁。因此OCPs的环境迁移和归趋一直是该领域的研究热点。树皮是一种天然的被动采样器,能够很好的反映出大气有机物长期的污染程度。本文简要论述了树皮作为被动采样器在大气污染物监测研究中应用的优势,并对OCPs在树皮中的残留浓度、特征及影响其富集的因素进行了探讨,最后特别针对具有手性的OCPs在树皮中的对映体选择性特征进行了评述。 相似文献
469.
Shaoqing Guo Xiangrui Niu Jindong Zhai 《Environmental science and pollution research international》2017,24(30):23578-23583
The utilization of coal gangue in power plants has become a new anthropogenic discharge source of mercury and attracted much concern in China. It is crucial to obtain the information about the mercury release during thermal treatment of coal gangue. In this study, the mercury release behavior of two coal gangues selected from two power plants were studied under different thermal treatment conditions of heating rate, residence time, and atmosphere. The results of mercury release profile show that the specified release temperature ranges for the different modes of occurrence of Hg are scarcely affected by the heating rate of 10, 20, and 40 °C/min. A higher heating rate could promote the Hg release to some extent. The mercury release ratio gradually increases with the extension of residence time for both coal gangues. The oxidizing environment has a positive effect on mercury release < 600 °C and has a minor effect > 600 °C. Mercury in coal gangue is more volatile than coal gangue matrix and the mercury in GD coal gangue is more easily released out than that in ED coal gangue. 相似文献
470.
Bioavailability evaluation,uptake of heavy metals and potential health risks via dietary exposure in urban-industrial areas 总被引:1,自引:0,他引:1
Balal Yousaf Guijian Liu Ruwei Wang Muhammad Imtiaz Muhammad Zia-ur-Rehman Mehr Ahmed Mujtaba Munir Zhiyuan Niu 《Environmental science and pollution research international》2016,23(22):22443-22453
A verity of human activities i.e. urbanization and industrialization have been resulted serious environmental contaminations by heavy metals in all over the world. The settlement of populations in urban and nearby industrial areas for economic development has significant share in their exposure to these metallic contaminants. Depending on the nature and type of the pollutants, targeted urban-industrial environments can have harmful and chronic health risk impacts on exposed local inhabitants and may require detoxification, healing and remedial therapy. Consequently, environmental monitoring as well as human health risk assessments of urban environments under industrial influence are key dominant features. We believe this work will provide new insights into the studies of metals exposure and associated health risks in emerging industrials cities of developing countries. Present study aimed to study the bioavailability of metals, quantify the changeability in soil and vegetable metal concentrations and estimation of human health risks via dietary exposure, focusing on urban-industrial environment. Soil and vegetable samples were collected in six random sites within the urban, periurban and industrial areas and analyzed for metal concentrations. In addition, risk assessment model proposed by US-EPA was employed to estimate the potential health risk of heavy metals via dietary intake. Results indicated that the heavy metal concentrations were noteworthy in periurban and urban-industrial areas. However, contamination levels varied with the type of vegetable, and the point source pollution such as traffic, urban wastes and industrial effluent. According to the estimated THQ and HI values for non-carcinogenic risk, little or no negative impact of heavy metals was observed on local inhabitants. However, the concentrations of Cr, Cd, Pb and Ni were nearly closed to the permissible limits described by US-EPA in urban-industrial areas. Conclusively, some efficient remedial strategies should be focus to overcome the increasing levels of Cr, Cd, Pb and Ni in this study area to protect the health of local inhabitants. 相似文献