便携式XRF测定飞灰中20种元素含量的方法及影响因素OA北大核心CSTPCD
Method and influencing factors research on the determination of 20 elements in fly ash using portable XRF
垃圾焚烧会产生大量的飞灰,飞灰中含有大量的重金属且浸出毒性高,对周边环境及人群产生了极大的危害.目前常用的飞灰元素分析方法需复杂的前处理及较长的检测时间,无法满足无害化处置过程中对飞灰的及时检测以及药剂用量的精确指导.便携式XRF光谱分析仪具有无需前处理、测量快速、多元素同时分析等优点.因此,本研究采用便携式XRF测定飞灰中20种元素含量的方法,并对该分析方法的线性范围、精密度和准确度进行了考察,同时,还探索了影响数据准确度的关键因素(真空度、测量膜种类、是否研磨和烘干).实验表明,相对标准偏差(RSD)为0.03％～7.58％,相对误差(RE)均在±20％范围内,方法具备较好的重现性、准确度和精密度;真空度和测量膜种类的选择会影响XRF的能.研究结果可为飞灰中元素的快速监测和评价提供建议和参考依据.
Incineration of garbage produces a large amount of fly ash,which contains a high level of heavy metals and leaches out highly toxic substances,posing significant threats to human health and the environment.The commonly used fly ash elemental analysis methods require a complex pretreatment and a long detection time,which cannot achieve the timely detection of fly ash and provide reliable guidance for the reagent dosage during the harmless disposal process.Portable XRF spectrometers have the advantages of no requirement for pre-treatment,rapid measurement,and simultaneous analysis of multiple elements.Therefore,this study adopted the method of using a portable XRF to determine the content of 20 elements in fly ash,and investigated the linear range,precision,and accuracy of this analysis method.Additionally,the key factors(vacuum degree,measurement film type,grinding,and drying)affecting the measurement accuracy were explored.The study showed that the relative standard deviation was 0.03％to 7.58％,and the relative error(RE)was within the range of±20％,indicating good reproducibility,accuracy,and precision of the method.The selection of vacuum degree and measurement film type can affect the performance of XRF.The results can provide suggestions and reference for the rapid monitoring and evaluation of elements in fly ash.
高盈盈;白松春;胡红云;任东;黄永达;董璐;姚洪
华中科技大学能源与动力工程学院,武汉 430000华中科技大学煤燃烧国家重点实验室,武汉 430000华中科技大学煤燃烧国家重点实验室,武汉 430000三峡大学计算机与信息学院,宜昌 443002华中科技大学煤燃烧国家重点实验室,武汉 430000华中科技大学煤燃烧国家重点实验室,武汉 430000华中科技大学煤燃烧国家重点实验室,武汉 430000
环境科学
飞灰元素便携式XRF光谱分析仪快速检测
fly ashelementsportable XRF spectrometerrapid detection
《环境工程学报》 2024 (11)
3280-3286,7
深圳市科技计划项目(JCYJ20220818103609020)
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