• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Environmental toxicology and chemistry >TOXICITY AND BIOACCUMULATION OF BIOSOLIDS-BORNE TRICLOSAN IN TERRESTRIAL ORGANISMS
【24h】

TOXICITY AND BIOACCUMULATION OF BIOSOLIDS-BORNE TRICLOSAN IN TERRESTRIAL ORGANISMS

机译：陆地微生物对三生菌的毒性和生物累积

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Triclosan (TCS) is a common constituent of personal care products and is frequently present in biosolids. Application of biosolids to land transfers significant amounts of TCS to soils. Because TCS is an antimicrobial and is toxic to some aquatic organisms, concern has arisen that TCS may adversely affect soil organisms. The objective of the present study was to investigate the toxicity and bioaccumulation potential of biosolids-borne TCS in terrestrial micro- and macro-organisms (earthworms). Studies were conducted in two biosolids-amended soils (sand, silty clay loam), following U.S. Environmental Protection Agency (U.S. EPA) guidelines. At the concentrations tested herein, microbial toxicity tests suggested no adverse effects of TCS on microbial respiration, ammonification, and nitrification. The no observed effect concentration for TCS for microbial processes was 10mg/kg soil. Earthworm subchronic toxicity tests showed that biosolids-borne TCS was not toxic to earthworms at the concentrations tested herein. The estimated TCS earthworm lethal concentration (LC50) was greater than 1 mg/kg soil. Greater TCS accumulation was observed in earthworms incubated in a silty clay loam soil (bioaccumulation factor [BAF] = 12±3.1) than in a sand (BAF = 6.5 ±0.84). Field-collected earthworms had a significantly smaller BAF value (4.3 ±0.7) than our laboratory values (6.5-12.0). The BAF values varied significantly with exposure conditions (e.g., soil characteristics, laboratory vs field conditions); however, a value of 10 represents a reasonable first approximation for risk assessment purposes. Environ. Toxicol. Chem.
机译：三氯生（TCS）是个人护理产品的常见成分，经常存在于生物固体中。生物固体在土地上的应用将大量TCS转移到土壤中。由于TCS是一种抗微生物剂，对某些水生生物有毒，因此人们开始担心TCS可能会对土壤生物产生不利影响。本研究的目的是研究生物固体载TCS在陆地微生物和大生物（ear）中的毒性和生物富集潜力。根据美国环境保护署（U.S. EPA）的指导，在两种生物固体改良的土壤（沙土，粉质粘土壤土）中进行了研究。在本文测试的浓度下，微生物毒性测试表明，TCS对微生物呼吸，氨化和硝化均无不利影响。对于微生物过程，TCS的未观察到的有效浓度为10mg / kg土壤。 sub亚慢性毒性测试表明，在本文测试的浓度下，生物固体携带的TCS对earth无毒。估计的TCS worm致死浓度（LC50）大于1 mg / kg土壤。在粉质粘土壤土中（生物累积因子[BAF] = 12±3.1）孵育的worm比在沙子中（BAF = 6.5±0.84）孵育的worm中观察到的TCS积累更大。野外采集的BA的BAF值（4.3±0.7）比我们的实验室值（6.5-12.0）小得多。 BAF值随暴露条件（例如土壤特性，实验室条件与田间条件）的不同而有很大差异;但是，值10代表用于风险评估目的的合理的第一近似值。环境。毒药。化学

著录项

  • 来源
    《Environmental toxicology and chemistry》 |2012年第3期|p.646-653|共8页
  • 作者

    Manmeet W. Pannu; George A. OConnor; Gurpal S. Toor;

  • 作者单位

    Soil and Water Science Department, University of Florida, Gainesville, Florida, USA;

    Soil and Water Science Department, University of Florida, Gainesville, Florida, USA;

    Soil and Water Quality Laboratory, Gulf Coast Research and Education Center, University of Florida, Wimauma, Florida, USA;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    triclosan; biosolids; earthworms; nitrogen-cycling; respiration;

    机译：三氯生生物固体;氮循环呼吸;

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号