Environmental Science and Pollution Research - Metal-free biochar to activate persulfate and degrade organic contaminants has attracted great attention in advanced oxidation processes, while the... 相似文献
In refineries and processing plants, the enormous amount of piping is more complex in distribution than other types of equipment. In general, compared with other types of equipment in these industries, more difficulty in inspection planning is encountered.
However, under-inspection or over-inspection can occur due to the lack of jurisdictional requirements on the inspection interval and method for piping, or the inspection interval being based only on piping service classifications in the existing regulations, such as API 570. This can result in unacceptable risks, along with costly loss of resources.
To lessen the piping risk level, more and more companies have adopted and applied risk based inspection (RBI) methodology, leading to risk reduction and cost benefits since the last decade. This study applied RBI methodology to optimize the inspection strategy of the piping in a refinery and petrochemical plants in Taiwan. Two actual case studies were corroborated better with quantitative RBI methodology than without the methodology in terms of risk and cost reductions. 相似文献
The hygroscopicity and optical properties of alkylaminium sulfates (AASs) were investigated using a hygroscopicity tandem differential mobility analyzer coupled to a cavity ring-down spectrometer and a nephelometer. AAS particles do not exhibit a deliquescence phenomenon and show a monotonic increase in diameter as the relative humidity (RH) ascends. Hygroscopic growth factors (GFs) for 40, 100 and 150 nm alkylaminium sulfate particles do not show an apparent Kelvin effect when RH is less than 45%, whereas GFs of the salt aerosols increase with initial particle size when RH is higher than 45%. Calculation using the Zdanovskii-Stokes-Robinson mixing rule suggests that hygroscopic growth of triethylaminium sulfate-ammonium sulfate mixtures is non-deliquescent, occurring at very low RH, implying that the displacement of ammonia by amine will significantly enhance the hygroscopicity of (NH4)2SO4 aerosols. In addition, light extinction of AAS particles is a combined effect of both scattering and absorption under dry conditions, but is dominated by scattering under wet conditions. 相似文献
Anthropogenic emissions impact significantly the atmospheric environment which human being relies on, e.g., global warming, stratospheric ozone depletion, photochemical smog, acid rain, haze and so on. Although clean air actions have been legislated by many nations to mitigate pollutants' emission with the aim of protecting the atmospheric environment, serious air pollution events are frequently observed in different regions, especially in developing countries. To best evaluate the effect of various control measures as well as the influence of various pollutants on the atmospheric environment, the levels, sources and sinks of the pollutants are needed to be comprehensively investigated. Since atmospheric environment involves multidisciplinary approach, scientists with different disciplines together can provide profound understandings about the atmospheric environmental problems. Sino-French Workshop on Atmospheric Environment is just one of such platforms to join scientists together for collaboration, exchange of experience and ideas. 相似文献