Cd污染地草坪草中Cd分布特征及化学形态的研究

应用生态学报 ›› 2002, Vol. ›› Issue (2): 175-178.

Cd污染地草坪草中Cd分布特征及化学形态的研究

铁梅, 梁彦秋, 张朝红, 李法云, 董厚德, 臧树良

辽宁大学环境与生命科学学院, 沈阳 110036

收稿日期:2000-08-29 修回日期:2000-12-11 出版日期:2002-02-15
通讯作者: 铁梅,女,1964生,硕士,主要从事环境化学、环境生态学方面的研究,发表论文10余篇.E-mail:LTMei@163.net
基金资助:
中国科学院陆地生态过程开放研究实验室基金;国家自然科学基金(29807002);教育部骨干教师基金;辽宁省科委博士启动基金资助项目(971019)

Distribution characteristics and chemical pattern of cadmium in grasses planted in the cadmium contaminated soil

TIE Mei, LIANG Yanqiu, ZHANG Chaohong, LI Fayun, DONG Houde, ZANG Shuliang

College of Environmental and Life Sciences, Liaoning University, Shenyang 110036

Received:2000-08-29 Revised:2000-12-11 Online:2002-02-15

摘要/Abstract

摘要： 对种植在沈阳西郊Cd污染地上草坪草中Cd的分布及化学形态进行了分析研究,结果表明,Cd主要分布于草的根系中,而且在不同草种中的分布特征存在较大差异,有些草对土壤中的Cd无明显的富集作用,具有抗Cd能力;而有些草对Cd有较强的富集能力.通过研究不同溶剂对不同草种的浸提效能,探明了草中Cd以酸溶态为最多,约占总量的63.3%;水溶态和有机态Cd均很少.在迁移转化过程中酸溶态Cd具有较大活性,水溶态Cd随时间和温度的变化而呈一定的规律性,有机态Cd随介质极性的增强而活性加大.

关键词: Cd, 化学形态, 草, 生物富集

Abstract: In this paper,the distribution and chemical pattern of Cd in the grasses planted in Cd contaminated soil in western suburb of Shenyang were analyzed.The results showed that Cd was mainly distributed in the grass roots,and characteristics of Cd distribution in various grasses were different.Some grasses had resisting ability against Cd,some had strong capability of bio-accumulation for Cd.Results of different grasses extracted by different solvents showed that acid-soluble Cd in grasses was about 63.3% of total,and water-soluble and organic Cd were little,accounting for 0.7% and 0.4% of total respectively.Acid-soluble Cd was more active than the others during the transformation in the soil-plant system,while water-soluble Cd had certain regularity with the change of time and temperature,and organic Cd became more active with the increase of solvent polarity.

Key words: Cadmium, Chemical pattern, Grass, Bio-accumulation

中图分类号:

X131.3

铁梅, 梁彦秋, 张朝红, 李法云, 董厚德, 臧树良. Cd污染地草坪草中Cd分布特征及化学形态的研究[J]. 应用生态学报, 2002, (2): 175-178.

TIE Mei, LIANG Yanqiu, ZHANG Chaohong, LI Fayun, DONG Houde, ZANG Shuliang . Distribution characteristics and chemical pattern of cadmium in grasses planted in the cadmium contaminated soil[J]. Chinese Journal of Applied Ecology, 2002, (2): 175-178.

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