Hebei Urban Atmospheric Dust Mineralogy Characteristic And Environmental Research Significance

At present, the influence of urban air quality primary pollutants are, so theatmospheric dust particles of atmospheric dust one of contaminants as a series ofmineralogical analysis, make clear the main source of particulate matter, whichinstructs the atmospheric dust pollution prevention work, not only has the scientificrationality, and prevention and control of atmospheric pollution to improve thepertinence has the important practical significance.Based on Hebei provincial capital city Shijiazhuang and industrial city ofTangshan two urban atmospheric dust and end yuan samples of sampling analysis,the acquisition of the atmospheric dust samples analyzed its size, the atmosphere ofthe spatial distribution characteristics of dustfall; Application of X-ray diffractionmethod for atmospheric dust and dust source mineral composition test samples,determine the atmospheric dust and dust source of minerals; Sem of atmosphericdust and dust source of mineral microtopography, samples, analyze thecharacteristics of different samples of microtopography characteristic; On theatmospheric dust and dust source of mineral composition and mineral samples of theanalysis of the characteristics of microtopography, from the mineralogicalcharacteristics of Angle, utilize mineral composition and micro morphologicalfeatures receptor samples of minerals and microtopography, the analysis of thefeatures, with a contrast analysis of dustfall and dust source analytical, qualitativejudgment sources, the major source of the pollutants in the two areas for futureresearch of atmospheric dust study provides a scientific information andmaterial.Some new understandings were concluded as follows:1、Based on the analysis of atmospheric dust particle size, the results showed that theshijiazhuang and tangshan two urban air of dustfall different particle size, are thebasic content of similar to10~50μm dust particle size is given priority to, maliki2.5~5μm soil. Dust particle size Dust particle size distribution of atmospheric spaceinto the analysis, the results showed that atmospheric dust has small particle size ofshijiazhuang focused on urban area, and a significant increase from around thedowntown particle characteristic; Tangshan atmospheric dust particle different levela surface diffusion shape distribution. Since atmospheric dust particle sizedistribution can table the migration distance source, accordingly knowable,shijiazhuang and tangshan downtown atmospheric dust transport two for closemigration patterns, the main pollution sources for local sources.2、Application of X-ray diffraction method for atmospheric dust and dust sourcemineral composition test samples from the same test results shows that the samplesshowed higher similarities. In different cities of atmospheric dust composition thereare distinct differences, and city industrial structure and climate factors. Atmosphericdust samples in shijiazhuang, quartz and clay mineral content, respectively, of thehighest29.1%and25.1%, plagioclase (15.2%), calcite (10.9%), thenardite (13.9%), gypsum (8.0%for), dolomite (7.6percent), potassium feldspar (7.0%respectively),glauberite (6.9%), hematite (6.6percent) and pyrite (5.4%); In addition also containsiderite, magnesite, stone salt, zeolite, hornblende, and barite, etc.; In tangshanatmospheric dust samples, main mineral components is quartz, clay and calcite, threeof the average of the total is hematite, financed, times of gypsum, dolomite andfeldspar, four kinds of minerals, mineral content exceeds the average total quarter,and other minerals such minerals and siderite, magnesite, halite, zeolite, hornblende,glauberite and thenardite etc.3、Combined with XRD and SEM test results, and matches by means of two EDXurban air and dust on sources apportionment of atmospheric dust, the results show thatthe source is more complex, the main source for DRM, including some for secondaryminerals in the day after tomorrow, is in of the atmospheric environment throughchemical function and to recrystallize generation, such as gesso, calcite and stone salt,etc.; Some are for the surface, but its source mineral grains is endless also and same,through different such represents the minerals analysis, the results for: hematitemainly from industrial burning dust, calcite, dolomite mainly from building dust,quartz, feldspar class mineral and clay mineral is mainly from the soil surface windsand or kick up dust.