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研究马莫特支流径流区域河水中正构烷的丰度,进而了解原始山地河流烃类的来源。正构烷的浓度变化范围从0.02mg/1至0.06mg/l,并显示出双峰型分布状态,一组在C_(15)—C_(23)、另一组在C_(23)—C_(32)之间。碳选择指数(分别是1.2和4.0)表示,第一组大部分是由非光合作用的水生生物产生的,第二组是由土壤和陆地植物产生的。水体和土壤的碳量大体相等。原始山地河流中的烃类,是从本地和外来两者演变而来。异戊二烯烃类的丰度要比烷烃少。异戊二烯烃比起正构烷难于在水中降解,即或降解也是极少量。检测限在1ng/l,不能检出芳香烃。地表水中的有机化合物对水质产生有害影响,使水产生颜色、气味、毒性以及致癌作用等。因此查明地表水中有机化合物的来源是非常重要的。其中烃类化合物,特别引起人们的关注。烃类在自然界中到处都有,在植物、微生物、沉积物、水成岩、土壤、和水中都有不同丰度的烃类。已报导过的含量情况是,陆地植物为100—6000μg/g(Smith和Martin—Smith1978;Eglinton和Hamilton,1963;Bachelor等,1972);水生植物为10μg/g(平均)(Rossi等,1978;Clark和Blumer,1967);沉积物和水成岩为10—3,800μg/g(Hunt,1961);土壤为0.1—2.6mg/g(Steverns等1955;Hodgson等1968);海水为0.5—800μg/l(Peake和Hodgson,1966;Jeffrey,1966);淡水为0.3—1μg/l(Peake等人1972;Peake和Hodgson1966)。土壤、沉积物和水中烃类,一般认为来源于植物和石油产品(Eglinton等人1962;Wakeham1977)。在马莫特流域山地河流中的有机化合物,主要是研究了烃类的产生来源和分布情况。用研究比较碳选择指数的方法研究推论山地河流中烃类的相应来源(Cooper和Bray1963)。
The abundance of n-alkanes in river waters of the tributaries of the Marmot was studied to understand the origins of hydrocarbons in the original mountain rivers. The concentration of n-alkanes ranged from 0.02 mg / l to 0.06 mg / l and showed a bimodal distribution with one group at C_ (15) -C_ (23) and the other at C_ (23) -C_ (32). The carbon selectivities (1.2 and 4.0, respectively) indicate that the first group is mostly produced by non-photosynthetic aquatic organisms and the second group is produced by soil and terrestrial plants. The amount of carbon in water and soil is roughly equal. Hydrocarbons in the original mountain rivers evolved both locally and externally. Isoprenoids are less abundant than alkanes. Isoprenoids are more difficult to degrade in water than n-paraffins, ie, they are very poorly degraded. The detection limit of 1ng / l, can not detect aromatic hydrocarbons. Organic compounds in surface water have a detrimental effect on water quality, giving water a color, odor, toxicity and carcinogenic effects. Therefore, it is very important to identify the source of organic compounds in surface water. One of the hydrocarbons, especially cause for concern. Hydrocarbons are found everywhere in nature and have different abundance of hydrocarbons in plants, microbes, sediments, diagenesis, soil, and water. Reported levels were 100-6000 μg / g for terrestrial plants (Smith and Martin-Smith 1978; Eglinton and Hamilton 1963; Bachelor et al. 1972); 10 μg / g for aquatic plants (average) (Rossi et al. 1978; Clark and Blumer, 1967); sediments and diagenes at 10-3,800 μg / g (Hunt, 1961); soils at 0.1-2.6 mg / g (Steverns et al 1955; Hodgson et al 1968); seawater at 0.5-800 μg / Peake and Hodgson, 1966; Jeffrey, 1966); freshwater at 0.3-1 μg / l (Peake et al. 1972; Peake and Hodgson 1966). Soil, sediment and aquatic hydrocarbons are generally considered to be derived from plant and petroleum products (Eglinton et al. 1962; Wakeham 1977). The organic compounds in mountainous rivers in the Mammut Basin mainly study the sources and distribution of hydrocarbons. A study comparing carbon sequestration indices was used to study the corollary of the corresponding sources of hydrocarbons in mountain rivers (Cooper and Bray 1963).