Removal of bisphenol A by the freshwater green alga Monoraphidium braunii and the role of natural organic matter
Removal of bisphenol A by the freshwater green alga Monoraphidium braunii and the role of natural organic matter
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DOI：
10.1016/j.scitotenv.2011.11.033
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发表时间：
2012-02-01
影响因子：
9.8
通讯作者：
Loffredo, Elisabetta
中科院分区：
文献类型：
--
作者：
Gattullo, C. Eliana;Baehrs, Hanno;Loffredo, Elisabetta
利用藻类等水生生物对沃茨进行植物修复是去除具有内分泌干扰能力的有机污染物的一种新方法。单针藻是一种绿色植物，生长速度快，对不同的天然有机物（NOM）具有良好的耐受性，本研究测试了单针藻对浓度为2、4和10 mg L-1的内分泌干扰物双酚A的耐受性和去除能力。NOM在浓度为2，5和20毫克L-1的DOC，被添加，因为它可能会干扰外源性物质和修改它们的效果，调节藻类生长性能或产生权衡两种效果。在藻生长2天和4天后，记录细胞数量和大小、光系统II在暗或光适应状态下的最大量子产率以及叶绿素a含量，以评估藻对双酚A的响应。此外，用色谱法测定了藻培养物中双酚A的残留量。结果表明，在2和4天后，双酚A在较低浓度下对藻类没有毒性，而在最高浓度下，它降低了藻类的生长和光合效率。单一NOM及其与双酚A在较低浓度下的组合增加了藻类的细胞数量和叶绿素a含量。经过4d的生长，M. braunii在浓度为2、4和10 mg L-1时，对初始双酚A的去除率分别为39%、48%和35%。在不同的处理中，发现较低的去除率后2天的增长。任何浓度的NOM对双酚A的去除几乎没有影响。根据所获得的数据，使用M。braunii可以合理地推荐用于水生环境中双酚A的植物修复。(C)2011爱思唯尔有限公司版权所有。
Phytoremediation of waters by aquatic organisms such as algae has been recently explored for the removal of organic pollutants possessing endocrine disrupting capacity. Monoraphidium braunii, a green alga known for rapid growth and good tolerance to different natural organic matter (NOM) qualities, was tested in this study for the ability to tolerate and remove the endocrine disruptor bisphenol A at concentrations of 2, 4 and 10 mg L-1, either in NOM-free or NOM-containing media. NOM at concentrations of 2, 5 and 20 mg L-1 of DOC, was added because it may interfere with xenobiotics and modify their effects, modulate algal growth performances or produce a trade-off of both effects. After 2 and 4 days of algal growth, the cell number and size, the maximum quantum yield of photosystem II in the dark or light adapted state, and the chlorophyll a content were recorded in order to evaluate the algal response to bisphenol A. Moreover, the residual bisphenol A was measured in the algal cultures by chromatographic technique. Results indicated that after 2 and 4 days bisphenol A at the lower concentrations was not toxic for alga, whereas at the highest concentration it reduced algal growth and photosynthetic efficiency. The sole NOM and its combinations with bisphenol A at the lower concentrations increased the cell number and the chlorophyll a content of algae. After 4-day growth, good removal efficiency was exerted by M. braunii at concentrations of 2, 4 and 10 mg L-1 removing, respectively, 39%, 48% and 35% of the initial bisphenol A. Lower removal percentages were found after 2-day growth in the different treatments. NOM at any concentration scarcely influenced the bisphenol A removal. On the basis of data obtained, the use of M. braunii could be reasonably recommended for the phytoremediation of aquatic environments from bisphenol A. (C) 2011 Elsevier B.V. All rights reserved.