NONEQUILIBRIUM SORPTION OF ORGANIC-CHEMICALS - ELUCIDATION OF RATE-LIMITING PROCESSES
NONEQUILIBRIUM SORPTION OF ORGANIC-CHEMICALS - ELUCIDATION OF RATE-LIMITING PROCESSES
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DOI：
10.1021/es00013a015
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发表时间：
1991-01-01
影响因子：
11.4
通讯作者：
RAO, PSC
中科院分区：
文献类型：
--
作者：
BRUSSEAU, ML;JESSUP, RE;RAO, PSC
报道了天然吸附剂对疏水性有机化合物非平衡吸附过程的实验结果。 与天然吸附剂进行的实验结果进行了比较，从系统中获得的速率数据，其中速率限制的吸附是由特定的吸附剂-吸附剂的相互作用。 这种比较表明，与特定的吸附剂-吸附剂相互作用的化学不平衡并没有显着的贡献率限制天然吸附剂的HOCs的吸附。 运输相关的非平衡也被证明不是一个因素的系统调查。 因此，试图解释的数据方面的两个，吸附相关的，扩散传质的概念模型：延迟内扩散和有机质内扩散。 分析提供了强有力的证据，有机质内扩散是负责的非平衡吸附表现出的系统在本文中研究。
The results of experiments designed to identify the process(es) responsible for nonequilibrium sorption of hydrophobic organic chemicals (HOCs) by natural sorbents are reported. The results of experiments performed with natural sorbents were compared to rate data obtained from systems wherein rate-limited sorption was caused by specific sorbate-sorbent interactions. This comparison showed that chemical nonequilibrium associated with specific sorbate-sorbent interactions does not significantly contribute to the rate-limited sorption of HOCs by natural sorbents. Transport-related nonequilibrium was also shown to not be a factor for the systems investigated. Hence, attempts were made to interpret the data in terms of two, sorption-related, diffusive mass-transfer conceptual models: retarded intraparticle diffusion and intraorganic matter diffusion. The analyses provide strong evidence that intraorganic matter diffusion was responsible for the nonequilibrium sorption exhibited by the systems investigated in this paper.