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利用混合降水采样器,对江西千烟洲和湖南会同两个森林生态站的大气硫、氮和汞的湿沉降和穿透水沉降进行了为期1 a的观测.在2013-12~2014-11的观测期间,千烟洲站降水中的SO_4~(2-)-S、NO_3~--N、NH_4~+-N和Hg的体积加权平均质量浓度分别为1.89 mg·L~(-1)、0.957 mg·L~(-1)、0.401 mg·L~(-1)和12.5 ng·L-1,而穿透水中的平均浓度分别为2.39 mg·L~(-1)、1.18 mg·L~(-1)、0.897 mg·L~(-1)和22.2 ng·L-1,穿透水浓度较降水有不同比例的增加.会同站穿透水中的元素平均浓度则分别为2.93mg·L~(-1)、1.60 mg·L~(-1)、0.502 mg·L~(-1)和22.0 ng·L-1.基于穿透水的千烟洲站大气硫、氮和汞的沉降量分别为3.56g·(m2·a)-1、3.02 g·(m2·a)-1和30.6μg·(m2·a)-1,会同站分别为6.18 g·(m2·a)-1、4.48 g·(m2·a)-1和37.3μg·(m2·a)-1,三者均在夏季达到最高.汞的干湿沉降量相当,而硫和氮的湿沉降量在总沉降量中占主导地位.与硫沉降和氮沉降主要来自人为源不同,自然源对汞沉降的贡献较明显,特别是在会同站.
Using the mixed precipitation sampler, the wet deposition and permeable water deposition of atmospheric sulfur, nitrogen and mercury in two forest ecosystem stations in Jiangxi Qianyanzhou and Hunan were studied for a period of 1 year. During 2013-12 ~ 2014-11 During the observation period, the volume weighted average concentrations of SO_4 ~ (2 -) - S, NO_3 ~ --N, NH_4 ~ + -N and Hg in Qianyanzhou Station were 1.89 mg · L -1 , 0.957 mg · L -1, 0.401 mg · L -1 and 12.5 ng · L -1, respectively, while the average penetrating water concentrations were 2.39 mg · L -1, 1.18 mg · L -1, L -1, 0.897 mg · L -1 and 22.2 ng · L -1, respectively, and the penetrating water concentrations increased in different proportions compared with the precipitation.The average concentrations of elements in the permeating water of Tonghui Station were respectively 2.93 mg · L -1, 1.60 mg · L -1, 0.502 mg · L -1 and 22.0 ng · L -1, respectively.The atmospheric sulfur, nitrogen and mercury based on water-penetrating Qianyanzhou station Were respectively 3.56g · (m2 · a) -1,3.02 g · (m2 · a) -1 and 30.6μg · (m2 · a) -1, and the same stations were 6.18 g · (m2 · a) -1, 4.48 g · (m2 · a) -1 and 37.3 μg · (m2 · a) -1, respectively, all reached the highest in summer.While the wet and dry settlements of mercury were comparable, while the wet settlements of sulfur and nitrogen were The total amount of sedimentation is dominant, with sulfur deposition and nitrogen deposition To come from different human sources, natural sources of contribution Hg deposition obvious, particularly in conjunction with the station.