安大略省西北部新鲜和燃烧植物及土壤中的总汞、甲基汞和碳。
Total mercury, methyl mercury, and carbon in fresh and burned plants and soil in Northwestern Ontario.
作者信息
Mailman M, Bodaly R A
机构信息
Department of Zoology, University of Manitoba, Winnipeg, Man. R3T 2N2, Canada.
出版信息
Environ Pollut. 2005 Nov;138(1):161-6. doi: 10.1016/j.envpol.2005.02.005.
Terrestrial plants and soil contain substantial amounts of organic carbon (C) and mercury. Flooding terrestrial areas stimulates microbial methyl mercury (MeHg) production and fish obtain elevated MeHg concentrations. Our purpose was to determine the loss of C, total mercury (THg), and MeHg from boreal plants and soil after burning to assess the potential of burning before flooding to lower MeHg. Fresh plants contained 4 to 52 ng g(-1) dry weight (dw) of THg and 0.1 to 1.3 ng g(-1) dw of MeHg. Upland soils contained 162+/-132 ng g(-1) dw of THg and 0.6+/-0.6 ng g(-1) dw of MeHg. Complete burning caused plants to lose 96, 98, 97, and 94% of the mass, C, THg, and MeHg, respectively. Upland soil lost 27, 95, 79, and 82% of the mass, C, THg, and MeHg, respectively. Our results demonstrated that a substantial loss of C, THg, and MeHg was caused by burning.
陆生植物和土壤含有大量的有机碳（C）和汞。淹没陆地区域会刺激微生物产生甲基汞（MeHg），鱼类体内的MeHg浓度也会升高。我们的目的是确定北方植物和土壤燃烧后碳（C）、总汞（THg）和甲基汞（MeHg）的损失情况，以评估在淹没前燃烧来降低甲基汞的可能性。新鲜植物的总汞含量为4至52纳克/克干重（dw），甲基汞含量为0.1至1.3纳克/克干重。旱地土壤的总汞含量为162±132纳克/克干重，甲基汞含量为0.6±0.6纳克/克干重。完全燃烧使植物分别损失了96%、98%、97%和94%的质量、碳、总汞和甲基汞。旱地土壤分别损失了27%、95%、79%和82%的质量、碳、总汞和甲基汞。我们的结果表明，燃烧导致了碳、总汞和甲基汞的大量损失。
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