...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Environmental toxicology and chemistry >Environmental Conditions Affecting Re-release from Particulate Matter of 4-Nonylphenol into an Aqueous Medium
【24h】

Environmental Conditions Affecting Re-release from Particulate Matter of 4-Nonylphenol into an Aqueous Medium

机译：影响4-壬基苯酚从颗粒物质释放到水介质中的环境条件

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

4-nonylphenol is a persistent organic pollutant with endocrine-disrupting properties. A nonpolar product of microbial degradation derived from the surfactant nonylphenol polyethoxylate, 4-nonylphenol is capable of long-range transport attached to particulates. Bioactive concentrations of 4-nonylphenol have been found in the surface water, soils, snow, and particulate matter of the Eastern Sierra Nevada Mountains (USA) hundreds of miles from their origins. As a result of particulate deposition, seasonal and glacial snow pack concentrations measured 20 to 100 times higher than in surface waters. Batch desorption assays were run on particulate matter dosed with 4-nonylphenol. Desorption was measured in 63 to 500 mu m particles under 2 different temperature conditions with varying fractions of organic carbon in turbulent or undisturbed states. Lower temperatures (4 degrees C) decreased the mean percentage of 4-nonylphenol released from particulates in disturbed and undisturbed conditions, whereas the mean percentage of 4-nonylphenol released at 20 degrees C was reduced by agitation. The effect of agitation at 4 degrees C was not practically or statistically significant. Particulates with a higher percentage of organic carbon (75%) released very little of the bound 4-nonylphenol (0.53%) compared with particulates containing 4 to 5% of organic carbon that released up to 13%. Larger particles released the least amount of 4-nonylphenol, whereas smaller particles released the most amount. Water and sediment samples taken from below the Palisades Glacier in the Sierra Nevada Mountains showed the greatest 4-nonylphenol concentrations directly below the glacier, implying that glacial particulates will release adsorbed 4-nonylphenol. Environ Toxicol Chem 2019;38:350-360. (c) 2018 SETAC
机译：4-壬基苯酚是一种具有破坏内分泌特性的持久性有机污染物。来源于表面活性剂壬基酚聚乙氧基化物的微生物降解的非极性产物4-壬基酚能够长距离传输到颗粒上。在内华达山脉东部（美国）的地表水，土壤，雪和颗粒物中，发现了4-壬基酚的生物活性浓度，距其起源数百英里。由于颗粒物沉积，季节性积雪和冰川积雪的浓度比地表水高出20至100倍。分批解吸测定法是对装有4-壬基苯酚的颗粒物进行的。在2种不同温度条件下，在63至500μm的颗粒中测量了解吸，其中有机碳的分数处于紊乱或不受干扰的状态。较低的温度（4摄氏度）降低了在扰动和不受干扰的条件下从颗粒中释放出的4-壬基苯酚的平均百分比，而通过搅拌降低了在20摄氏度时释放出的4-壬基苯酚的平均百分比。在4℃下搅拌的效果在实践上或统计学上都不显着。与包含4％至5％有机碳的颗粒释放高达13％的颗粒相比，有机碳百分比较高（75％）的颗粒释放的键合4-壬基苯酚含量很少（0.53％）。较大的颗粒释放最少的4-壬基酚，而较小的颗粒释放最多的。从内华达山脉山脉的Palisades冰川下面采集的水和沉积物样品显示，在冰川正下方最大的4-壬基酚浓度，这意味着冰川颗粒将释放吸附的4-壬基酚。 Environ Toxicol Chem 2019; 38：350-360。 （c）2018年SETAC

著录项

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