Effects of humic acid on transport and transformation of mercury in soil-plant systems
- 148 Downloads
The influence of humic acid (HA) on the transport and transformation of mercury (Hg) in soil was studied. No available Hg could be detected (<2.5 μg kg−1) in alluvial soil when the content of HA-carbon (HA-C) was higher than 0.2 g kg−1 although a large amount of Hg (8 μg kg−1) was applied to the soil. The available Hg decreased with the increase of HA in purple soil (r=0.735). There are significant correlations between HA concentration and organic Hg in the tested soils (r=0.974 for the purple soil and r=0.979 for the alluvial soil). The increase of HA results in decrease of Hg absorbed by plant from the soil. A loss of Hg from soil caused by microbes was observed.
Key wordshumic acid mercury transport transformation soil-plant system
Unable to display preview. Download preview PDF.
- Bai, Y. and Zhang, Z. X.: 1988,China Env. Sci. (in Chinese)8, 6, 16–23.Google Scholar
- Guo, Y. J.: 1994,Int. Conf on Hg as a Global Pollut. Canada.Google Scholar
- Manoura, R., Dickson, R. and Riley, J.: 1978,Estuar Coast, Marin. Sci. 6, 381–388.Google Scholar
- Pang, S. W.: 1981,Acta Scientae Circumstantiae (in Chinese)1, 234–240.Google Scholar
- Peng, A. and Wang, W. H.: 1982,Acta Scientiae Circumstantiae (In Chinese)2, 215–220.Google Scholar
- Qing, C. L. and Mou, S. S.: 1993,Pedosphere 3, 67–73.Google Scholar
- Strohol, P.: 1970,Proc. Symp. Nucl. Tech. Environ. Pollut. Publ. I. A. E. A. Vienna, 439–448.Google Scholar
- Wang, H. K.: 1982,Acta Scientiae Circumstantiae (in Chinese)1, 62–67.Google Scholar
- Yang, G. Z., Xia, J. Q. and Rong, J.: 1979,Acta Pedologica Sinica (in Chinese)16, 38–43.Google Scholar
- Zhu, S. H., Zhao, Y., Liu, P. and Bai, Y.: 1987,J.of Beijing Agri. U., (in Chinese)13, 1, 59–63.Google Scholar