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81.
82.
在统计分析的基础上,对消防事故水池予以规范化命名。根据中国相关法律法规,明确了应建消防事故水池的行业和企事业单位。通过对影响消防事故水池容积的消防历时、固定消防水量、固定冷却水量、机动消防水量、消防水循环、泡沫灭火流量等的分析,提出消防事故水池容积计算的具体建议,以供有志于此类研究者以及设计和建设单位借鉴。 相似文献
83.
冷冻固定化优势菌群处理含甲醛苯酚废水 总被引:13,自引:0,他引:13
以甲醛苯酚废水为对象,采用PVA1799冷冻改良法固定化优势菌群,对最佳包埋条件,固化菌体活性恢复特性,甲醛和苯酚的降解特性和pH波动的低抗特性等进行了研究。结果表明,以10%-17%PVA1799,25%菌泥混合,-4-10℃冷冻解融4次为最佳包埋工况;固定化菌群最佳的活生恢复时间为3-5d,对肖度为475mg/L的甲醛有95%的去除率,对肖度为565mg/L的苯酚有94%以上的去除率,平均污染 相似文献
84.
Wang Zhe Bian Yuan Xu Yilin Zheng Chunli Jiang Qinghong An Chunjiang 《Environmental science and pollution research international》2023,30(8):20133-20146
Environmental Science and Pollution Research - Fresh biochar has been widely applied to the remediation of heavy metals in soil by its property of adsorption, but the changes in its physicochemical... 相似文献
85.
Mi Jun Bian Jie Liu Yaru Guo Wenxia 《Environmental science and pollution research international》2020,27(30):37199-37209
Environmental Science and Pollution Research - The aim of this study was to explore the enterprises in the mining area, in the face of environmental pollution, to use relationship embedding to... 相似文献
86.
Yingnan Jiang Ming Hua Bian Wu Hongrui Ma Bingcai Pan Quanxing Zhang 《Environmental science and pollution research international》2014,21(10):6729-6735
Effective arsenic removal from highly laden industrial wastewater is an important but challenging task. Here, a combined coprecipitation/nano-adsorption process, with ferric chloride and calcium chloride as coprecipitation agents and polymer-based nanocomposite as selective adsorbent, has been validated for arsenic removal from tungsten-smelting wastewater. On the basis of operating optimization, a binary FeCl3 (520 mg/L)–CaCl2 (300 mg/L) coprecipitation agent could remove more than 93 % arsenic from the wastewater. The resulting precipitate has proved environmental safety based on leaching toxicity test. Fixed-bed column packed with zirconium or ferric-oxide-loaded nanocomposite was employed for further elimination of arsenic in coprecipitated effluent, resulting in a significant decrease of arsenic (from 0.96 to less than 0.5 mg/L). The working capacity of zirconium-loaded nanocomposite was 220 bed volumes per run, much higher than that of ferric-loaded nanocomposite (40 bed volumes per run). The exhausted zirconium-loaded nanocomposite could be efficiently in situ regenerated with a binary NaOH–NaCl solution for reuse without any significant capacity loss. The results validated the combinational coprecipitation/nano-adsorption process to be a potential alternative for effective arsenic removal from highly laden industrial effluent. 相似文献
87.
Duian Lu Lixia Wang Baixing Yan Yang Ou Jiunian Guan Yu Bian Yubin Zhang 《Waste management (New York, N.Y.)》2014,34(8):1529-1536
Pig manure usually contains a large amount of metals, especially Cu and Zn, which may limit its land application. Rock phosphate has been shown to be effective for immobilizing toxic metals in toxic metals contaminated soils. The aim of this study work was to investigate the effect of rock phosphate on the speciation of Cu and Zn during co-composting of pig manure with rice straw. The results showed that composting process and rock phosphate addition significantly affected the changes of metal species. During co-composting, the exchangeable and reducible fractions of Cu were transformed to organic and residue fractions, thus the bioavailable Cu fractions were decreased. The rock phosphate addition enhanced the metal transformation depending on the level of rock phosphate amendment. Zinc was found in the exchangeable and reducible fractions in the compost. The bioavailable Zn fraction changed a little during the composting process. The composting process converted the exchangeable Zn fraction into reducible fraction. Addition of an appropriate amount (5.0%) of rock phosphate could advance the conversion. Rock phosphate could reduce metal availability through adsorption and complexation of the metal ions on inorganic components. The increase in pH and organic matter degradation could be responsible for the reduction in exchangeable and bioavailable Cu fractions and exchangeable Zn fraction in rock phosphate amended compost. 相似文献
88.
油田采油污泥的热解动力学及其热解效果研究 总被引:3,自引:1,他引:2
以新疆克拉玛依油田采油污泥为对象,分别采用热重分析仪和小型流化床热解反应器研究了含油污泥的热解过程及其热解效果。结果表明,油泥热解主要经历了失水、轻质组分挥发、重组分快速热解失重和缓慢失重4个阶段,热解过程基本符合一级动力学方程,提高热解的升温速率,可使油泥的最大失重速率Dmax、失重速率峰值温度θmax、升温终点的最大失重率都随之增加,表现在动力学上,反映出表观活化能和碰撞频率因子的同时升高,即提高油泥热解转化率的同时也影响了热解效率。失水油泥用流化床热解,在热解温度600℃、反应时间3 min时,油泥回收率可达到87%。 相似文献
89.
高压脉冲放电等离子体对水中土霉素的降解 总被引:1,自引:0,他引:1
采用针-板式高压脉冲放电等离子体降解水中土霉素,考察了放电输出功率、空气流量、电极间距、溶液初始浓度、初始pH、初始电导率和添加Fe2+的量对土霉素去除率的影响。实验结果表明,高压脉冲放电等离子体对水中土霉素有较好的去除效率,在初始浓度200 mg/L,放电功率64 W,电极间距8 mm,空气流速0.05 m3/h,初始pH为2.6,初始电导率1.083 mS/cm条件下,反应12 min后,土霉素的去除率可达97%。向溶液中添加Fe2+,可提高土霉素的去除率。TOC随着反应时间的延长逐渐减小,反应12 min时,TOC去除率可达57%,说明大分子物质被降解为小分子物质,部分被完全矿化为CO2和H2O。 相似文献
90.
2009年初以来,在福建省九龙江北溪的支流和干流连续发生了拟多甲藻(Peridiniopsis penardii)水华。经检测,拟多甲藻水华没有明显的生物毒性,但其所形成的深褐色水色和轻微藻腥味对该流域的龙岩、漳州和厦门三城市的生产和生活是造成了一定的影响。研究结果表明,在甲藻水华的防治与应急处置过程中,必须进一步加强组织体系建设,明确各职能部门职责,并根据不同水域的实际情况和季节变化,采取相应的物理、化学和生物方法予以防治和应急处置。 相似文献