IMPACTS OF ENVIRONMENTAL-CHANGES ON THE BIOGEOCHEMISTRY OF AQUATIC HUMIC SUBSTANCES

被引:40
作者
DEHAAN, H
机构
关键词
HUMIC SUBSTANCES; AQUATIC ECOSYSTEMS; BIOGEOCHEMISTRY; ACIDIFICATION; EUTROPHICATION; UV RADIATION;
D O I
10.1007/BF00006991
中图分类号
Q17 [水生生物学];
学科分类号
071004 ;
摘要
Humic substances (HS) are the main constituent of the organic carbon pool in stained aquatic ecosystems. HS absorb visible and ultraviolet (UV) light, have acid-base properties and metal and nutrient binding abilities. Based on these characteristics, UV irradiation, pH and the trophic status of aquatic ecosystems will influence the impact of HS on element cycling in surface waters. With climatic change and environmental pollution, UV irradiance, acidification and eutrophication may increase further. In this paper impacts of UV irradiation, pH and eutrophication on the structure, properties and biodegradation of aquatic HS are discussed.
引用
收藏
页码:59 / 71
页数:13
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