Effects of a non-ionic surfactant (Tween-80) on the mineralization, metabolism and uptake of phenanthrene in wheat-solution-lava microcosm
Effects of a non-ionic surfactant (Tween-80) on the mineralization, metabolism and uptake of phenanthrene in wheat-solution-lava microcosm
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DOI：
10.1016/s0045-6535(00)00605-6
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发表时间：
2001-10-01
期刊：
影响因子：
8.8
通讯作者：
Kettrup, A
中科院分区：
文献类型：
--
作者：
Li, Y;Yediler, A;Kettrup, A
用~(14)C标记菲研究了非离子表面活性剂吐温-80对小麦-熔岩微宇宙中菲的矿化、代谢和吸收的影响。在该体系中菲的矿化和代谢速度较快。施入的菲中至少有90%在24天内转化。只有0.3%的C-14活性被鉴定为母体菲。大部分C-14活性(70%)是从小麦中恢复的，其中约70%与小麦茎叶有关，约30%与小麦根有关。应用的C-14活性的33%和20%分别被构建到小麦的地上部和根组织中。以CO2和挥发性有机化合物(VOCs)形式恢复的C-14-活性分别为12-16%和4-5%。菲的主要代谢物是极性化合物(占所用C-14的18%)，仅有2.1%被鉴定为非极性代谢物。小麦地上部未发现菲，说明菲不能从根向植株上部运输，而是以代谢物(主要是极性代谢物)的形式存在。叶片通过空气以(CO2)-C-14形式吸收C-14-活性。吐温-80的存在显著促进了菲的降解，这可能是由于吐温-80提高了体系中微生物的活性。吐温-80还显著(P<；0.05)降低了小麦根系中菲的含量，这可能是由于表面活性剂导致菲从根表面解吸所致。(C)2001爱思唯尔科学有限公司。保留所有权利。
Effects of a non-ionic surfactant (Tween-80) on the mineralization, metabolism and uptake of phenanthrene in wheat-solution-lava microcosm were studied using C-14-labeled phenanthrene. The mineralization and metabolism of phenanthrene were fast in such a system. At least 90% of the applied phenanthrene were transformed within 24 days. Only 0.3% of the applied C-14-activity were identified to be the parent phenanthrene. Most of the applied C-14-activity (70%) was recovered from wheat, in which ca. 70% were associated with wheat shoots (stems and leaves) and ca. 30% wheat roots. 33% and 20% of the applied C-14-activity had been constructed into wheat tissues of shoots and roots, respectively. The C-14-activity recovered in forms Of CO2 and volatile organic chemicals (VOCs) was 12-16% and 4-5%, respectively. The major metabolites of phenanthrene were polar compounds (18% of the applied C-14) and only 2.1% were identified as non-polar metabolites. No phenanthrene was found in wheat shoots indicating that it could not be transported from roots to upper parts of the plant but in form of metabolites (mostly polar metabolites). Foliar uptake of C-14-activity via air in form of (CO2)-C-14 occurred. The presence of Tween-80 significantly enhanced the degradation of phenanthrene, which could be attributed to its increase of microbial activities in the system. Tween-80 also significantly (P < 0.05) reduced the phenanthrene level in wheat roots, which probably resulted from desorption of phenanthrene from root surface caused by the surfactant. (C) 2001 Elsevier Science Ltd. All rights reserved.