PARTICLE-SIZE DISTRIBUTION OF CHROMIUM - TOTAL AND HEXAVALENT CHROMIUM IN INSPIRABLE, THORACIC, AND RESPIRABLE SOIL PARTICLES FROM CONTAMINATED SITES IN NEW-JERSEY
PARTICLE-SIZE DISTRIBUTION OF CHROMIUM - TOTAL AND HEXAVALENT CHROMIUM IN INSPIRABLE, THORACIC, AND RESPIRABLE SOIL PARTICLES FROM CONTAMINATED SITES IN NEW-JERSEY
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DOI：
10.1080/02786829208959572
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发表时间：
1992-10-01
影响因子：
5.2
通讯作者：
SANDERS, P
中科院分区：
文献类型：
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作者：
KITSA, V;LIOY, PJ;SANDERS, P
在新泽西的几个地点发现铬酸盐渣与土壤混合。以前对受污染土壤的分析仅限于粒径> 30 μ m的土壤。这项研究的重点是吸入，胸部和呼吸颗粒，将进入人体呼吸道，如果污染的土壤成为空气传播。本文讨论了在矿渣污染场地和可见六价铬晶体场地的土壤采样程序。此外，干燥和筛分程序和技术需要重新悬浮在密封室中的污染粉尘的空气动力学粒度分级（30，10，和2.5 μ m）。在过滤器上收集再悬浮的灰尘，并通过X射线荧光（XRF）分析38种元素。湿化学技术用于测量总可浸提物和六价铬。发现1.6%的炉渣具有颗粒空气动力学直径（在50%切割点）d50 = 30 μ m，其中1.1%为d50 = 10 μ m，0.26%为d50 = 2.5 μ m。总铬和铅浓度超过1000 ppm的发现，在所有的颗粒尺寸。两种分析技术得出的总铬结果的比较表明，总铬，在污染的土壤中存在的可溶性和不溶性形式，硝酸法提取约30%的总铬存在于渣中的XRF测量。在含有可见铬花的污染土壤中发现六价铬浓度> 1000 ppm，可吸入、胸部和呼吸尺寸范围分别为1800、1700和1200 ppm。
Chromate slag is found mixed with soil at several sites in New Jersey. Previous analyses of the contaminated soil were limited to particle sizes > 30-mu-m. This study focuses on the inspirable, thoracic, and respirable particles that would enter the human respiratory tract, should the contaminated soil become airborne. This article discusses the soil-sampling procedure used at a slag-contaminated site and a site with visible hexavalent chromium crystals. In addition, the drying and sieving procedures and the techniques needed to resuspend the contaminated dust in a sealed chamber are described for aerodynamic size fractionation (30, 10, and 2.5-mu-m). The resuspended dust was collected on filters and analyzed for 38 elements by x-ray fluorescence (XRF). Wet chemistry techniques were used to measure total extractable and hexavalent chromium. It was found that 1.6% of the slag had a particle aerodynamic diameter (at 50% cut-point) d50 = 30-mu-m, of that 1.1% was d50 = 10-mu-m and 0.26% was d50 = 2.5-mu-m. Total chromium and lead concentrations above 1000 ppm were found in all particle sizes. Comparison of the total chromium results derived for two analytical techniques showed that the total chromium, in the contaminated soil exists in soluble and nonsoluble forms, and that the nitric acid method extracts approximately 30% of the total chromium present in the slag measured by XRF. Hexavalent chromium concentrations > 1000 ppm were found in the contaminated soil that contained visible chromium blooms, and were 1800, 1700, and 1200 ppm for the inhalable, thoracic, and respirable size ranges, respectively.