دورية أكاديمية
Removal of 2,4,6-trichlorophenol from a solution by humic acids repeatedly extracted from a peat soil
| العنوان: | Removal of 2,4,6-trichlorophenol from a solution by humic acids repeatedly extracted from a peat soil |
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| المؤلفون: | Tzou, Y.M., 王尚禮, Wang, S.L., Liu, J.C., Huang, Y.Y., Chen, J.H., 鄒裕民, 陳仁炫 |
| سنة النشر: | 2008 |
| المجموعة: | National Chung Hsing University Institutional Repository - NCHUIR / 國立中興大學 |
| مصطلحات موضوعية: | aliphaticity, aromaticity, 2,4,6-trichlorophenol, Nonlinear sorption, linear sorption, sorption isotherm, sediment organic-matter, phenanthrene sorption, fractions, polarity, water, chlorophenols, nonlinearity, naphthalene, substances, binding |
| الوصف: | Humic acid (HA) is one of the major components of soil organic matter. It strongly affects the sorption behavior of organic and inorganic contaminants in soils. To obtain a better understanding of the interactions of contaminants with HA, a repeated extraction technique has been applied to a peat soil to obtain HA fractions with varying aliphaticity and aromaticity, which were subsequently correlated to the sorption properties of 2,4,6-trichlorophenol (TCP). HA fractions were extracted repeatedly using an alkaline solution and each HA fraction was separated into two portions with an air-drying or re-suspending (denoted as RSHAs) process. Solid-state (13)C NMR and elemental analysis demonstrated that the aromaticity and polarity of HAs decreased with extractions. Kinetic results indicated that air-dried HAs exhibited two-step first order sorption behavior with a rapid stage followed by a slower stage. The slower sorption is attributed to the diffusion of 2,4,6-TCP in the condensed aromatic domains of HAs. Conversely, sorption of 2,4,6-TCP on RSHAs was extremely rapid and could not be fitted with any kinetic model. For air-dried HAs the sorption capacity (K,) was weakly correlated with the chemical compositions of HAs. However, a positive trend between K, and aromaticity was observed for RSHAs. Compared with the results of air-dried HAs with their counterparts of RSHAs, it is therefore concluded that air-drying may alter the structure of HAs through artificially creating a more condensed domain in HAs. The structural alternation may result in an incorrect interpretation of the relationship between sorption capacity and chemical composition of HAs and a misjudgment of the transport behavior of 2,4,6-TCP in soils and sediments. (c) 2007 Elsevier B.V. All rights reserved. |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| تدمد: | 0304-3894 |
| العلاقة: | #PLACEHOLDER_PARENT_METADATA_VALUE#; Journal of Hazardous Materials; Journal of Hazardous Materials, Volume 152, Issue 2, Page(s) 812-819.; http://dx.doi.org/10.1016/j.jhazmat.2007.07.047Test; http://hdl.handle.net/11455/44630Test |
| DOI: | 10.1016/j.jhazmat.2007.07.047 |
| الإتاحة: | https://doi.org/10.1016/j.jhazmat.2007.07.047Test http://hdl.handle.net/11455/44630Test |
| حقوق: | none |
| رقم الانضمام: | edsbas.9D22F943 |
| قاعدة البيانات: | BASE |
| تدمد: | 03043894 |
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| DOI: | 10.1016/j.jhazmat.2007.07.047 |