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471.
钼磷酸氧化萜烯醇光度法测定矿山废水中松脂油(二号油) 总被引:1,自引:0,他引:1
在文献的基础上,利用钼磷酸在浓硫酸作用下于乙醇介质中优先氧化萜烯酸及其衍生物,而本身被还原为钼兰的性质,本文建立了测定矿山废水中松脂油的方法,方法检出限为0.006mg/5ml,回收率在88%—107%之间,相对标准偏差为5.05%。本文还对钼磷酸的溶剂选择,钼磷酸和浓硫酸的用量对吸光度的影响,以及浓盐酸的用量对萃取效率影响做了详细研究。 相似文献
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土壤石油类(红外法)标样制作方法的研究 总被引:4,自引:0,他引:4
对我国环境监测用于土壤矿物油污染监测所必备的标准样品制作方法作了探索,尤其对该类标样的液-固态吸附饱和及其浓度平衡关系作了探讨,从理论上保证标样的均匀性和稳定性,为标样最后的定值分析提供依据. 相似文献
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Transfer assessment of carbendazim residues from rapeseed to oil production determined by HPLC–MS/MS
Yinghong Li Jing Hu Zhoulin Yao Qiang Wang 《Journal of environmental science and health. Part. B》2020,55(8):726-731
AbstractIt is crucial to develop practical procedures for the control and reduction of pesticide residues in oil productions from farm to dining table. In this study, the dissipation behaviors of typical fungicide from rapeseed to oil production were studied to reveal relationship among spraying stage, application dosage, household oil processing stage, and pesticide residues. In the field trials, rape plants were sprayed with carbendazim at three different dosages during flowering period. Transfer assessment of carbendazim residues from rapeseed to oil production during household oil processing via different press techniques was determined using high-performance liquid chromatography coupled with tandem mass spectrometry (HPLC–MS/MS). The recoveries of carbendazim in rapeseed samples, meals after squeezing samples, and rapeseed oil samples ranged from 82.5% to 93.6% with relative standard deviations (RSDs) <5.2%. The validation results illustrated that the methods were reliable and sensitive. The average processing factor (PF) during household oil processing via hot press technique and cold press technique was 0.15 and 0.51, respectively. This study demonstrated that household oil processing could significantly reduce the pesticide residues, especially by hot press technique. 相似文献
477.
Utilization of ash residues, including coal ash, oil ash, and municipal solid waste combustion ash, for the construction of artificial reefs at sea has been investigated by many researchers throughout the world for nearly 20 years. Both laboratory and field studies have shown that an artificial reef made of stabillized ash-concrete (SAC) has had no adverse effect on the marine environment. Indeed, published studies have shown that fish counts increase around SAC reefs owing to an abundance of colonizing organisms and to protection provided by cavities within the reef structures. However, public and regulatory resistance to the use of SAC for artificial reef construction at sea is still very strong in certain countries due to concern for possible negative environmental impacts, primarily in the area of bioaccumulation of elements or compounds originating from the ash component of SAC.
In this paper, technological feasibility of using ash residues for artificial reef construction is presented, based on the available 20 years of scientific data, including engineering workability, physical integrity, chemical leaching potential and biological effects. More important, we also identify conceptual barriers for the acceptance of using SAC for the construction of ocean reefs and suggest approaches to overcome these barriers. 相似文献
In this paper, technological feasibility of using ash residues for artificial reef construction is presented, based on the available 20 years of scientific data, including engineering workability, physical integrity, chemical leaching potential and biological effects. More important, we also identify conceptual barriers for the acceptance of using SAC for the construction of ocean reefs and suggest approaches to overcome these barriers. 相似文献
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用不同剂量的润滑油(引擎油、齿轮油)、煤油和废油污染土壤,探讨它们对水稻和后茬萝卜生长的影响.结果表明,引擎油在剂量为5ml/100g土时对水稻生长和后茬萝卜的成苗及苗高均有影响;齿轮油、煤油和废油在剂量为2ml/100g土时对水稻秧苗无多大影响,在剂量为1ml/100g土时对后茬萝卜有抑制作用.对被废油污染的土壤,可用油处理剂S.G805治理.但剂量以1000mg/L以下为宜. 相似文献