Full-Text Search:
Home|Journal Papers|About CNKI|User Service|FAQ|Contact Us|中文
《Agricultural Research in the Arid Areas》 2016-03
Add to Favorite Get Latest Update

Nitrate and nitrite concentrations in vegetables and soils in Yuzhong County of Gansu Province and their safety evaluation

WANG Yan-bin;YANG Yi-ming;ZENG Liang;SU Qiong;ZHAO Li-bin;Northwest University of Nationalities,School of Chemical Engineering;Key Laboratory for Utility of Environment-friendly Composite Materials and Biomass in Universities of Gansu Province;Sichuan Nitrocell Company,Ltd.;  
A systematic survey of nitrate and nitrite concentrations in five kinds of vegetables( involving 100samples) and their corresponding soils at 20 sampling sites in vegetable plots of Yuzhong County,Gansu Province,was conducted for assessing their pollution,bioavaibility,and safety to local residents. The results showed that the average concentrations of nitrate and nitrite in surface soils in the studied plots were 30. 58 mg·kg~(-1)and 52. 35mg·kg~(-1),respectively,and that in deep soils were 9. 14 mg·kg~(-1)and 0. 11 mg·kg~(-1),respectively,indicating that the deposition of nitrate and nitrite was mainly in surface soils. The average concentrations of nitrate and nitrite in vegetables were 1649. 18 mg·kg~(-1)and 0. 64 mg·kg~(-1)fresh weight( FW),respectively. The average bio-concentration factors( BCFs) of nitrate and nitrite in vegetables were 53. 94 and 0. 01,respectively. The average concentrations of nitrate and nitrite in five vegetables were significantly different,with nitrate being higher than nitrite in vegetables. The order of nitrate in vegetables was Chinese cabbage ≈ cauliflower leek ≈ celery ≈ cabbage,and that of nitrite in vegetables was leek cauliflower ≈ cabbage ≈ celery Chinese cabbage. Chinese cabbage had stronger enrichment ability of nitrate. Of all the samples,2% was slightly,7% moderately,33% severely,and 56% seriously polluted by nitrate.
【Fund】: 西北民族大学中央高校基本科研业务费专项资金项目(zyj2011007;zyj2011006;No.31920130023)
【CateGory Index】: X56;X53
Download(CAJ format) Download(PDF format)
CAJViewer7.0 supports all the CNKI file formats; AdobeReader only supports the PDF format.
Similar Journals
©2006 Tsinghua Tongfang Knowledge Network Technology Co., Ltd.(Beijing)(TTKN) All rights reserved