首页 | 本学科首页   官方微博 | 高级检索  
     检索      


An investigation of lead chromate (crocoite-PbCrO4) and other inorganic pigments in aged traffic paint samples from Hamilton,Ohio: implications for lead in the environment
Authors:Katherine White  Teresa Detherage  Maxwell Verellen  Jennifer Tully  Mark P S Krekeler
Institution:1. Department of Geology and Environmental Earth Science, Miami University-Hamilton, Hamilton, OH, 45011, USA
2. Department of Geology and Environmental Earth Science, Miami University, Oxford, OH, 45056, USA
Abstract:Traffic paint samples collected from roads in the City of Hamilton, Butler County, OH, USA were investigated to determine whether or not pigments are hazardous and are of environmental concern. Powder X-ray diffraction (XRD) and scanning electron microscopy (SEM) indicate that white and gray paint samples are dominated by calcite, rutile, anatase and quartz and blue traffic paint samples are dominated by calcite and barite. XRD and SEM indicate that most yellow traffic paints have lead chromate (crocoite-PbCrO4) with common particle sizes that are typically 125–350 nm in length and 75–200 nm in width. Larger aggregates of several micrometers in diameter are also observed. The solubility of PbCrO4 (1.34 × 10?7 mol/L at 25 °C) combined with an increase in solubility with exposure to 0.05–0.25 M NaCl and CaCl2 road treatments solutions as demonstrated by basic batch experiments likely makes PbCrO4 from traffic paint a potential source for lead pollution in surface water and groundwater that is not fully recognized.
Keywords:
本文献已被 SpringerLink 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号