摘要
采集了四川省内有代表性的26个土壤,对腐殖酸结合汞在土壤中的水平分布和在土壤剖面中的垂直分布进行了分析讨论.结果表明,腐殖酸结合汞及其两组分在土壤中的分布受到内在物源腐殖酸和外来汞源的决定性影响,以及土壤性质的影响.腐殖酸结合汞(HAs-Hg)和组分胡敏酸结合汞(HA-Hg)在不同土纲土壤中以淋溶土纲含量最高,其次是半水成土纲和初育土纲,最低是铁铝土纲;组分富里酸结合汞(FA-Hg)的含量以在半水成土纲中最低.在土壤剖面中,表现为土层越深,HAs-Hg与两组分含量、HA-Hg/FA-Hg比例越低.
Horizontal and vertical distribution of humic acids bound Hg (HAs-Hg) were analyzed and discussed through 26 representative soils in Sichuan Province. Results showed that distribution of HAs-Hg and its two components was influenced decisively by internal humic acids and external Hg sources, as well as by soil properties. HAs-Hg and component HA-Hg existed in soils of different soil orders in descending order (from top to low) as Alfisol, semi-hydromorphic soil, initial development soil and ferrallitic soil, while FA-Hg content was the lowest in semi-hydromorphic soil. In soil profile it displayed that the deeper the soil horizon, the lower the HAs-Hg and the two components together with the ratio of HA-Hg to FA-Hg.
出处
《中国环境科学》
EI
CAS
CSSCI
CSCD
北大核心
2002年第2期179-183,共5页
China Environmental Science
基金
国家博士点基金资助项目(970601)
关键词
腐殖酸结合汞
胡敏酸结合汞
富里酸结合汞
土纲
土壤剖面
humic acids bound Hg(HAs-Hg)
humic acid bound Hg(HA-Hg)
fulvic acid bound Hg(FA-Hg)
soil order
soil profile
