佛山地区土壤中三氯生(TCS)与三氯卡班(TCC)的含量分布特征及生态风险初步评价

doi:10.19741/j.issn.1673-4831.2021.0604

摘要/Abstract

摘要： 三氯生(triclosan, TCS)和三氯卡班(triclocarban, TCC)是目前流行的广谱性抗菌剂,已被广泛添加在日用护理品中,可通过人们的洗漱活动、经污水处理厂的出水及底泥再次利用而进入到土壤中。该研究采集佛山地区不同土地利用类型区的21个表层土壤样品,分析土壤中2种典型的医药品和个人护理用品(pharmaceuticals and personal care products,PPCPs)类污染物TCS和TCC的污染特征,运用生态风险熵值法探讨TCS和TCC的生态风险。结果表明,TCS和TCC的检出率分别为66.67%和85.71%,含量范围分别为ND~6.62和 ND~9.11 μg·kg^-1。土壤有机质是影响TCS和TCC分布的重要因素,pH值对TCS和TCC含量分布影响较小。生态风险熵值(RQ值)分析结果表明,21个表层土壤样品中TCS的RQ值均小于0.1,表明此区域内TCS的生态风险较小;21个采样点中有2个采样点TCC的RQ值在0.1~<1之间,主要分布在河道两侧,表明此区域存在中等生态风险,其余采样点的RQ值均小于0.1。与国内外其他区域相比,该区域土壤TCS与TCC总体生态风险较小,但仍需关注河道两侧部分高值区。

关键词: 三氯生(triclosan,TCS), 三氯卡班(triclocarban,TCC), 污染, 生态风险评价, 土壤

Abstract: Triclosan (TCS) and triclocarban (TCC) are popular broad-spectrum antibacterial agents that are widely added to daily care products. They can be reintroduced into soil through anthropogenic washing activities and the reuse of effluent and sediment from sewage treatment plants. In this study, 21 surface soil samples were collected from land with diverse uses in Foshan, China. The pollution characteristics of TCS and TCC, as 2 typical pharmaceutical and personal care product pollutants, in the soil samples were analyzed. The ecological risks of TCS and TCC were evaluated by using the ecological risk entropy method. The detection rates of TCS and TCC in the surface soils were 66.67% and 85.71%, respectively; the concentrations of TCS and TCC ranged from ND to 6.62 μg·kg^-1 and ND to 9.11 μg·kg^-1, respectively. Soil organic matter is an important factor affecting the distribution of TCS and TCC, and the pH had a minor effect on the distribution of TCS and TCC. Analysis of the ecological risk quotient (RQ) revealed that the RQ values of TCS in the 21 surface samples were all less than 0.1, indicating that the ecological risk of TCS in this region was low, and the soil was relatively safe. The RQ values of TCC at two of the 21 sample points were between 0.1 and 1, and TCC was mainly detected at sampling points on both sides of the river, indicating that the ecological risk of TCC in this region is moderate, which might be related to local economic development, the growing human population, and sewage discharge. Compare with the other regions home and abroad, the ecological risk caused by TCS and TCC in the surface soil of this region belong to lower level. Nevertheless, areas with soil possessing high concentrations of these pollutants merit increased attention.

Key words: TCS (triclocarban), TCC (triclosan), contamination, ecological risk assessment, soil

中图分类号:

陈敏, 陈莉, 钟真宜. 佛山地区土壤中三氯生(TCS)与三氯卡班(TCC)的含量分布特征及生态风险初步评价[J]. 生态与农村环境学报, 2022, 38(12): 1586-1592.

CHEN Min, CHEN Li, ZHONG Zhen-yi. Distribution of Triclosan and Triclocarban in the Surface Soils of Foshan, China, and a Preliminary Assessment of Their Ecological Risks[J]. Journal of Ecology and Rural Environment, 2022, 38(12): 1586-1592.

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