Joint action of binary mixtures of cetyltrimethyl ammonium chloride and aromatic hydrocarbons on Chlorella vulgaris.

Joint action of binary mixtures of cetyltrimethyl ammonium chloride and aromatic hydrocarbons on Chlorella vulgaris.
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十六烷基三甲基氯化铵和芳香烃二元混合物对小球藻的联合作用。

DOI:
10.1016/j.ecoenv.2010.06.003
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发表时间:
2010-10
影响因子:
6.8
通讯作者:
--
中科院分区:
环境科学与生态学2区
文献类型:
--
作者:

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研究了阳离子表面活性剂十六烷基三甲基氯化铵(CTAC)与6种芳烃(AH)二元混合物对绿色小球藻的联合作用。在单一体系中,CTAC对藻类生长的抑制效果远高于苯、甲苯、苯酚、硝基苯、菲和荧蒽等六种芳烃。在联合系统中,CTAC的毒性增强低浓度的AH。在0-1.13 μ g/L和1.13-100.84μg/L的荧蒽浓度范围内,CTAC的96 h EC 50值分别为145±13.35-56 ± 8.27和56±8.27-226±8.22μg/L。随着荧蒽浓度的增加,藻的Zeta电位先增加后降低,而在复合体系中,残余CTAC浓度则表现出相反的趋势。研究结果表明,荧蒽影响C.普通的上述结果表明,阳离子表面活性剂和羟基芳烃对水生生物具有协同毒性效应。
The joint action of binary mixtures of cetyltrimethyl ammonium chloride (CTAC), a cationic surfactant, and six aromatic hydrocarbons (AHs) on green algae Chlorella vulgaris was investigated. In single systems, inhibition efficiency of CTAC on the growth of algae was much higher than that of AHs (benzene, toluene, phenol, nitrobenzene, phenanthrene and fluoranthene). In combined systems, the toxicity of CTAC was enhanced by low concentrations of AHs. 96h EC50value of CTAC varied from 145±13.35–56±8.27 to 56±8.27–226±8.22μg/L when exposed to 0–1.13 and 1.13–100.84μg/L fluoranthene, respectively. Zeta potential of algae initially increased and then decreased with the increase of fluoranthene concentration, whereas residual CTAC concentration displayed an opposite trend in the combined system. These results of this investigation showed that fluoranthene influenced the sorption of CTAC by C. vulgaris. The above results indicated that cationic surfactants and AHs have synergetic toxic effects on aquatic biota.
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