Full-Text Search:
Home|Journal Papers|About CNKI|User Service|FAQ|Contact Us|中文
《Journal of Tianjin Normal University(Natural Science Edition)》 2018-05
Add to Favorite Get Latest Update

Application of improved geo-accumulative index method in the ecological assessment of heavy metals

WANG Qianqian;WANG Zuwei;HOU Yingying;WANG Zilu;School of Geographic and Environmental Sciences,Tianjin Normal University;  
The geo-accumulatie index method is a common method to evaluate the ecological risk of heavy metals in soil or sediment. This method only can evaluate the single heavy metal in a sample site but can not comprehensively analyze the pollution degree of heavy metals in a region. In order to expand the application scope of the geo-accumulative index method,the evaluation model was improved using the two indexes of the maximum pollution and the average pollution. In or-der to verify the scientificity and reliability of the improved geo-accumulative index method,the Yuqiao Reservoir Basin in Tianjin was taken as an example to evaluate the ecological risk of the heavy metals,and the evaluation results of the improved geo-accumulative index method were compared with the evaluation results using the potential ecological risk assessment method and the pollution load index method. When the ecological risk of heavy metals in a single sample site was evaluated,the results of the improved geo-accumulative index method and the potential ecological risk index method are consistent,all of which are in light pollution levels,but the evaluation results of the pollution load index method are in medium pollution level. When the comprehensive ecological risk of heavy metals in the region was evaluated,the results of the improved geo-accumulative index method and the pollution load index method are both in middle pollution level. When the medium pollution distance is used to evaluate the ecological risk of heavy metal in single sample site,the results of improved geo-accumulative index method are similar with those of the potential ecological risk index method,and they are slightly lower than the value of the pollution load index method. When comprehensirely evaluating the ec ological risk of heavy metals in a region,the results of improved geo-accumulative index method are close to those of the pollution load index method,and the area belongs to the middle pollution level. It can be seen that the improved geo-accumulative index method can be used to comprehensively evaluate the ecological risk of heavy metals in region.
【Fund】: 国家自然科学基金资助项目(40973078)
【CateGory Index】: X826
Download(CAJ format) Download(PDF format)
CAJViewer7.0 supports all the CNKI file formats; AdobeReader only supports the PDF format.
©2006 Tsinghua Tongfang Knowledge Network Technology Co., Ltd.(Beijing)(TTKN) All rights reserved