TY - JOUR
T1 - Joint action of binary mixtures of cetyltrimethyl ammonium chloride and aromatic hydrocarbons on Chlorella vulgaris
AU - Ge, Fei
AU - Xu, Yin
AU - Zhu, Runliang
AU - Yu, Fangqin
AU - Zhu, Menjun
AU - Wong, Minghung
N1 - Funding Information:
We gratefully acknowledge the financial support from Research Foundation of National Natural Science Foundation of China (No. 20877065 ), Excellent Youth Project of Education Committee of Hunan Province of China (No. 07B077 ), Program for New Century Excellent Talents in University of China ( NECT-10-0148 ), the Specialized Research Fund for the Doctoral Program of Xiangtan University ( KZ08008 ) and the Mini-AoE (Area of Excellence) Fund from Hong Kong Baptist University .
PY - 2010/10
Y1 - 2010/10
N2 - 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 EC50 value of CTAC varied from 145±13.35-56±8.27 to 56±8.27-226±8.22γg/L when exposed to 0-1.13 and 1.13-100.84γg/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.
AB - 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 EC50 value of CTAC varied from 145±13.35-56±8.27 to 56±8.27-226±8.22γg/L when exposed to 0-1.13 and 1.13-100.84γg/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.
KW - Aquatic organism
KW - Aromatic hydrocarbons
KW - Cationic surfactant
KW - Joint action
UR - http://www.scopus.com/inward/record.url?scp=77957012607&partnerID=8YFLogxK
U2 - 10.1016/j.ecoenv.2010.06.003
DO - 10.1016/j.ecoenv.2010.06.003
M3 - Journal article
C2 - 20708266
AN - SCOPUS:77957012607
SN - 0147-6513
VL - 73
SP - 1689
EP - 1695
JO - Ecotoxicology and Environmental Safety
JF - Ecotoxicology and Environmental Safety
IS - 7
ER -
