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Dissolved humic substances -- Part VIII: Substrata of the natural chemistry of halogens

机译：溶解的腐殖质-第八部分：卤素天然化学的基质

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Natural humic substances contain a small percentage of halogens with chlorine as the quantitatively most important. Natural chlorinated hydrocarbons can be found in ancient groundwater and very old lacustrine sediments (contamination can be excluded). Recently developed fingerprint techniques show that chlorine, bromine and iodine bind differently to various molecular weight fractions. They are also subject to microbial degradation. Recent reports indicate that bacteria, microalgae, macroalgae andlignin-degrading fungi contribute significantly to natural halogen chemistry. A natural abiotic pathway seems to exist in addition to the biotic pathway. Halomethanes (such as chloroform), halogenated aromatic and aliphatic compounds are the quantitatively dominating compound families. For example, the natural emission of chloromethane exceeds the man-made emission by more than two orders of magnitude. Further climate-relevant alkylhalogen compounds can also be formed naturally. In soils and in freshwater, formation and in many instances degradation is strongly correlated to humic content.
机译：天然腐殖质物质中含有少量卤素，而氯在数量上是最重要的。在古老的地下水和非常古老的湖相沉积物中可以发现天然的氯代烃（可以排除污染）。最近开发的指​​纹技术表明，氯，溴和碘与各种分子量组分的结合方式不同。它们还经受微生物降解。最近的报道表明，细菌，微藻类，大型藻类和木质素降解真菌对自然卤素化学有显着贡献。除生物途径外，似乎还存在天然的非生物途径。卤代甲烷（例如氯仿），卤代芳族和脂族化合物是数量占主导地位的化合物家族。例如，氯甲烷的自然排放量超过了人为排放量两个多数量级。还可以自然形成其他与气候有关的烷基卤素化合物。在土壤和淡水中，形成以及许多情况下的降解与腐殖质含量密切相关。

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