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蔡喜运, Cui N, Zhang XX, Xie Q, Wang S, Chen JW, Huang LP, Qiao XL, Li XH, Cai XY*
Environ. Pollut., 2011, 159(2), 609-615.,-0001,():
-1年11月30日
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【期刊论文】Time-dependent degradation and toxicity of the herbicide diclofop-methyl in algal suspensions
蔡喜运, Cai XY, Ye J, Sheng GY, Liu WP
Environ. Sci. Pollut. Res., 2009, 16(4), 459-465,-0001,():
-1年11月30日
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【期刊论文】Relation of diclofop-methyl toxicity and degradation in algae cultures
蔡喜运, Cai XY, Liu WP, Jin MQ, Lin KD
Environ. Toxicol. Chem., 2007, 26(5), 970-975,-0001,():
-1年11月30日
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蔡喜运, Yu Zhang, Xiyun Cai, Weina Xiong, Hao Jiang, Haitong Zhao, Xianhai Yang, Chao Li, Zhiqiang Fu, Jingwen Chen
PLoS ONE,-0001,():
-1年11月30日
Effects of pH on adsorption and removal efficiency of ionizable organic compounds (IOCs) by environmental adsorbents are an area of debate, because of its dual mediation towards adsorbents and adsorbate. Here, we probe the pH-dependent adsorption of ionizable antibiotic oxytetracycline (comprising OTCH2+, OTCH±, OTC−, and OTC2−) onto cyclodextrin polymers (CDPs) with the nature of molecular recognition and pH inertness. OTCH± commonly has high adsorption affinity, OTC− exhibits moderate affinity, and the other two species have negligible affinity. These species are evidenced to selectively interact with structural units (e.g., CD cavity, pore channel, and network) of the polymers and thus immobilized onto the adsorbents to different extents. The differences in adsorption affinity and mechanisms of the species account for the pH-dependent adsorption of OTC. The mathematical equations are derived from the multiple linear regression (MLR) analysis of quantitatively relating adsorption affinity of OTC at varying pH to adsorbent properties. A combination of the MLR analysis for OTC and molecular recognition of adsorption of the species illustrates the nature of the pH-dependent adsorption of OTC. Based on this finding, γ-HP-CDP is chosen to adsorb and remove OTC at pH 5.0 and 7.0, showing high removal efficiency and strong resistance to the interference of coexisting components.
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蔡喜运, Yu Zhang , Xiyun Cai, Xianming Lang, Xianliang Qiao, Xuehua Li, Jingwen Chen
Environmental Pollution,-0001,():
-1年11月30日
Co-contamination of ligand-like antibiotics (e.g., tetracyclines and quinolones) and heavy metals prevails in the environment, and thus the complexation between them is involved in environmental risks of antibiotics. To understand toxicological significance of the complex, effects of metal coordination on antibiotics’ toxicity were investigated. The complexation of two antibiotics, oxytetracycline and ciprofloxacin, with three heavy metals, copper, zinc, and cadmium, was verified by spectroscopic techniques. The antibiotics bound metals via multiple coordination sites and rendered a mixture of various complexation speciations. Toxicity analysis indicated that metal coordination did modify the toxicity of the antibiotics and that antibiotic, metal, and their complex acted primarily as concentration addition. Comparison of EC50 values revealed that the complex commonly was highest toxic and predominately correlated in toxicity to the mixture. Finally, environmental scenario analysis demonstrated that ignoring complexation would improperly classify environmental risks of the antibiotics.
Antibiotic, Metal, Complexation, Toxicity, Environmental process
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