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61.
建立了一次性餐具中砷的氢化物发生-原子荧光测定方法,在选定的试验条件下,荧光强度与砷质量浓度在0μg/L-180μg/L范围内呈线性关系,相关系数0.999 3,溶液检测限0.5μg/L,回收率96%-101%。 相似文献
62.
用石墨炉原子吸收分光光度法测定环境废水中的痕量镉时,Mn、Cr、Ni、Cu、Co、Zn等共存元素干扰严重。用100mg/L的铁作为基体改进剂可消除上述共存元素的干扰,测定结果令人满意。 相似文献
63.
粉煤灰吸附处理炼油污水中石油类物质的应用研究 总被引:1,自引:0,他引:1
以炼油污水气浮后用于冲灰为目的,对粉煤灰吸附炼油污水中的石油类物质进行了初步研究,主要研究了水灰比、与油水的混合时间、静置沉淀时间等因素对粉煤灰吸附石油类效率的影响。研究表明,水灰比对粉煤灰吸附石油类效率的影响最显著。通过正交试验法,找出了粉煤灰处理炼油污水的最优工艺参数组合,为指导现场工作提供了理论依据。同时对粉煤灰吸附处理炼油污水中石油类的性能进行了研究,证实在常温状态下粉煤灰对石油类的吸附等温线符合Freundlich方程。 相似文献
64.
Mohamed Ismael Riadh Sahnoun Ai Suzuki Michihisa Koyama Hideyuki Tsuboi Nozomu Hatakeyama Akira Endou Hiromitsu Takaba Momoji Kubo Shinkichi Shimizu Carlos A. Del Carpio Akira Miyamoto 《International Journal of Greenhouse Gas Control》2009,3(5):612-616
DFT calculations in gas and aqueous solution phases have been performed to study the mechanism of carbamate formation by the absorption of CO2 in 2-amino-2-methyl-1-propanol (AMP). The results reveal the importance of considering the effect of water as solvent for the reaction to proceed. Furthermore water molecules play an important role as a basic reactant leading to stable intermediates formation. These results point at a single-step, third order reaction as the most probable mechanism for the formation of carbamate by the absorption process. 相似文献
65.
Information on the transfer of radionuclides to fruits was almost absent in the former TRS 364 “Handbook of parameter values for the prediction of radionuclide transfer in temperate environments”. The revision of the Handbook, carried out under the IAEA Programme on Environmental Modelling for RAdiation Safety (EMRAS), takes into account the information generated in the years following the Chernobyl accident and the knowledge produced under the IAEA BIOMASS (Biosphere Modelling and Assessment) Programme in the years 1997–2000. This paper describes the most important processes concerning the behaviour of radionuclides in fruits reported in the IAEA TRS 364 Revision and provides recommendations for research and modelling. 相似文献
66.
67.
原子吸收光谱法测定酸雨中K、Na、Ca、Mg方法改进 总被引:2,自引:1,他引:1
用0.1%硝酸溶液配制混合标准溶液,不加抗干扰试剂,火焰原子吸收光谱法直接测定酸雨中K、Na、Ca、Mg,方法精密度、准确度满足酸雨监测的分析要求。 相似文献
68.
Mohammad Khan Jamali Tasneem Gul Kazi Mohammad Bilal Arain Hassan Imran Afridi Nusrat Jalbani Jameel A. Baig Abdul Niaz 《The Environmentalist》2008,28(4):366-375
The recycling of sewage sludge on agriculture land represents an alternative, advantageous, disposal of this waste material.
The aim of the present study was to evaluate the feasibility of using industrial sewage sludge, produced in Pakistan, as a
fertiliser. Agricultural soil amended with 25% (w/w) sewage sludge with or without lime treatment was used for growing a variety
of sorghum (PARC-SS-1). The mobility of the heavy metals (HMs) (Cd, Cu, Cr, Ni, Pb and Zn) and metalloid (As) in the untreated
industrial waste water sewage sludge (UIWS) samples were assessed by applying a modified BCR (Community Bureau of Reference)
sequential extraction procedure. The single extraction procedure comprised of the application of mild extractant (CaCl2) and water for the estimation of the proportion of easily soluble metal fractions. The precision and accuracy of BCR was
evaluated by using a certified reference material of soil amended with sewage sludge BCR 483. The plant available metal contents,
as extracted by the deionised water and 0.01 M CaCl2 solution and exchangeable fraction of BCR sequential, decreased with lime application in the range of 10–44% for As, Cr,
Ni, Pb and Zn, except in the cases of Cd and Cu, where their mobility was increased by 10% and 24%, respectively. Sludge amendment
enhanced the dry weight yield of sorghum and the increase was more obvious after liming up to 25%. The uptake of HMs were
lower in test samples (3.2–21.8%), except for Cu and Cd, which was higher (4%), while they were below the permissible limit
of these metals. The present experiment demonstrates that liming was important in factors facilitating the growth of sorghum
in sludge-amended soil. 相似文献
69.
本文对分布面广而复杂的瓦斯泵房噪声源进行了测试和深入的分析,采用综合治理的方法使居民区噪声达到了国家城市环境噪声标准的要求,瓦斯泵房内降噪显著,取得了理想的治理效果。 相似文献
70.