ZHANG Jiaquan1, 2 ， HU Tianpeng1 ， LIU Hao1 ，YAN Guihua1 ， ZHANG Ting2 ， ZHANG Li1 ，ZHENG Jingru1 ， XIAO Wensheng1
(1. a. School of Environmental Science and Engineering; b. Hubei Key Laboratory of Mine Environmental Pollution Control and Remediation， Hubei Polytechnic University， Huangshi 435003， China; 2. Institute of Earth Environment， Chinese Academy of Sciences， Xi'an 710075， China)
Abstract： There were 29 dustfall samples collected from the section of Huangshi to Wuhan of the National Highway No.316 during May 2012. The mass fractions of water soluble ions (NH4+, K+, Mg2+, Ca2+, F-, Cl-, Br-, NO2-, NO3-, SO42-) in the samples were determined by ion chromatography. The results show that Ca2+、Cl-、NO3- and SO42- are the major ionic composition in the dustfall samples. The order of mass fraction is SO42-, Ca2+, NO3-, Cl- . NH4+， K+, Mg2+, Ca2+, F-, Cl-, NO3- and SO42- are presented local pollution. The mean mass fraction ratio of NO3- and SO42- is 0.06. The results from ion balance calculation analysis suggest that the dustfall samples are weak acidic. Through the correlational analysis and principal component analysis, Ca2+, Mg2+ and SO42-show a positive correlation， and the correlative coefficients are 0.997 and 0.956, respectively. The major sources of dustfall are characterized as urban dust and land surface dust, followed by transportation exhaust and fossil fuel combustion．
Keywords: the National Highway No. 316; dustfall; water soluble ion; pollution characteristic
中图分类号：X513 文献标志码：A
文章编号：1008-5548（2014）06-0034-06
DOI:10.13732/j.issn.1008-5548.2014.06.008
收稿日期：2014-01-27， 修回日期：2014-03-06，在线出版时间：2014-12-22。
基金项目：湖北省自然科学基金项目，编号：2013CFC099；湖北理工学院优秀青年科技创新团队计划项目，编号：13xtz07；矿区环境污染控制与修复湖北省重点实验室开放课题，编号：2012102。
第一作者简介：张家泉(1980— )，男，博士，讲师，研究方向为污染物环境行为及来源解析。 E-mail：jiaquanzh@163.com。
