Storm impacts upon the composition of organic matrices in Nagara River--a study based on molecular weight and activated carbon adsorbability.
Storm impacts upon the composition of organic matrices in Nagara River--a study based on molecular weight and activated carbon adsorbability.
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风暴对长良河有机基质组成的影响——一项基于分子量和活性炭吸附性的研究。
DOI：
10.1016/s0043-1354(03)00330-0
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发表时间：
2003
期刊：
影响因子：
12.8
通讯作者：
Y. Matsui
中科院分区：
文献类型：
--
作者：
Fusheng Li;A. Yuasa;Hajime Chiharada;Y. Matsui
利用6个水样，从分子量和活性炭吸附能力两个方面研究了暴雨对长良河水中天然有机物（NOM）组成的影响。采用HPSEC系统分析了分子量组成，并分别采用设计的参数表征了NOMs的平均吸附强度（KM）、吸附强度多分散性（σ）、对AC的亲和力（1/n）和非吸附分数（Cnon/CT 0）。这些参数是由模型描述的分布假想组分法所观察到的等温线。暴雨使河源水体中大分子有机物含量增加，NOMs重均分子量在2962-3495道尔顿之间变化，分子量多分散性在1.153 ~ 1.226之间变化。用TOC和UV 260两个指标对所有样品的Km和σ值进行比较，结果表明，大部分受风暴影响的有机组分具有与风暴前相似的吸附强度，表现出较强吸附性和较弱吸附性的组分的存在水平较低。在所有的有机成分带入河流的暴雨，不可吸附的百分比较低（较小的Cnon/CT 0值），和可吸附的一般有更多的亲和力所使用的吸附剂（较小的1/n值）。
The impacts of a heavy storm of rain on the composition of natural organic matter (NOM) in Nagara River water were studied in terms of molecular weights (MWs) and activated carbon (AC) adsorbabilities using six water samples collected during a critical Typhoon weather condition. The composition in MWs was analyzed using a HPSEC system and that in adsorbabilities was characterized using parameters devised to reflect NOMs average adsorptive strength (KM), adsorptive strength polydispersity (σ), affinity to AC (1/n) and non-adsorbable fraction (Cnon/CT0), respectively. These parameters were determined by model description of observed isotherms with a distributed fictive component method. The heavy storm of rain brought higher content of larger organic components into the river source, thus causing changes of NOMs weight-averaged MWs in the range of 2962–3495 Dalton and MW polydispersity in the narrow range of 1.153–1.226. Comparison of KMand σ values for all samples assessed with both indices of TOC and UV260 showed that large proportions of the storm-induced organic components had adsorptive strengths similar to those existent before the storm, with the presence levels for components revealing much strong and weak adsorbabilities being low. Among all organic components brought into the river by the storm of rain, the percentages of non-adsorbable ones was lower (smaller Cnon/CT0values); and the adsorbable ones had generally more affinity to the adsorbents used (smaller 1/n values).