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醋酸盐类城市道路抑尘剂的生态毒性及生物降解特性

凌文翠 李真真 孙长虹 方瑶瑶 刘桂中

凌文翠, 李真真, 孙长虹, 方瑶瑶, 刘桂中. 醋酸盐类城市道路抑尘剂的生态毒性及生物降解特性[J]. 环境科学研究, 2016, 29(11): 1643-1650.
引用本文: 凌文翠, 李真真, 孙长虹, 方瑶瑶, 刘桂中. 醋酸盐类城市道路抑尘剂的生态毒性及生物降解特性[J]. 环境科学研究, 2016, 29(11): 1643-1650.
LING Wencui, LI Zhenzhen, SUN Changhong, FANG Yaoyao, LIU Guizhong. Eco-Toxicity and Biodegradation of an Acetate Urban Road Dust Suppressant[J]. Research of Environmental Sciences, 2016, 29(11): 1643-1650.
Citation: LING Wencui, LI Zhenzhen, SUN Changhong, FANG Yaoyao, LIU Guizhong. Eco-Toxicity and Biodegradation of an Acetate Urban Road Dust Suppressant[J]. Research of Environmental Sciences, 2016, 29(11): 1643-1650.

醋酸盐类城市道路抑尘剂的生态毒性及生物降解特性

基金项目: 北京市科技计划-首都蓝天行动培育专项(Z141100001014014)

Eco-Toxicity and Biodegradation of an Acetate Urban Road Dust Suppressant

  • 摘要: 醋酸盐类抑尘剂因其具有良好的抑尘效果和生态友好性,被越来越多地用于城市道路抑尘.为了揭示醋酸盐类抑尘剂的水生态效应,选取水环境中占据不同生态位的4种水生生物(发光细菌、羊角月牙藻、大型溞和青鳉鱼)进行急性毒性测试.结果表明:4种水生生物对醋酸盐类抑尘剂的敏感程度依次为羊角月牙藻>大型溞>青鳉鱼>发光细菌.确定了抑尘剂与大型溞、发光细菌、青鳉鱼的剂量-效应关系,抑尘剂对三者的EC50/LC50(半数效应浓度/半致死浓度)分别为1.29、37.6、32.7 g/L.抑尘剂对羊角月牙藻的急性毒性及其质量浓度之间没有呈现出明确的数量关系,但是可推断EC50为mg/L量级.以此为基础,推断醋酸盐类抑尘剂的预测无效应浓度范围为21.8~177 μg/L.不同温度下抑尘剂在水中的生物降解速率结果显示,在5和25 ℃时,醋酸盐类抑尘剂均易被降解,主要是微生物和藻类的共同降解作用所致.研究显示,醋酸盐类抑尘剂易于生物降解且生态毒性较低,但在使用时应注意区域总量控制,以防止对水生生物造成潜在威胁.

     

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出版历程
  • 收稿日期:  2016-03-17
  • 修回日期:  2016-08-07
  • 刊出日期:  2016-11-25

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