相关实验视频

Updated: Jul 30, 2026

A Whole Cell Bioreporter Approach to Assess Transport and Bioavailability of Organic Contaminants in Water Unsaturated Systems

A Whole Cell Bioreporter Approach to Assess Transport and Bioavailability of Organic Contaminants in Water Unsaturated Systems

Published on: December 24, 2014

从生物固体改变的土壤中运输和多基物质 (PFAS):一种实验和数值方法

Alonso Doria-Manzur¹, Evan P Gray¹, Summer S Streets²

¹Civil Environmental and Construction Engineering, Texas Tech University, USA.

|October 4, 2025

概括

和多醇基物质 (PFAS) 存在于应用于土壤的生物固体中. 这项研究表明,PFAS漏到地下水是缓慢的,但随着时间的推移而显著,需要对土地应用地点进行全面的风险评估.

科学领域:

环境化学环境化学
土壤科学土壤科学
环境工程环境工程

背景情况:

和多醇基物质 (PFAS) 是常规废水处理不能去除的持久性有机污染物.
废水处理的副产品生物固体含有累积的PFAS,经常应用于农田.
不过,PFAS从生物固体修饰土壤中出地下水的泄漏行为和运输机制尚不清楚.

研究的目的:

研究PFAS从生物固体修饰土壤中的运输机制和长期泄漏潜力.
在现场条件下模拟特定PFAS ( perfluorooctanoic acid和 perfluorooctane sulfonate) 进入地下水的运动.
在考虑PFAS污染的情况下,为土地应用生物固体提供最佳管理实践的信息.

主要方法:

市政生物固体与土壤混合,并装入和的流通柱.
生物固体,修改土壤和柱体化剂使用目标分析,总可氧化前体 (TOP) 测定和嫌疑人查进行了分析.
用HYDRUS 1-D建模和列数据,以确定长期漏模拟的运输参数.

主要成果:

大多数PFAS前体 (>65%) 在浸出实验后仍然被吸收到生物固体修改土壤中.
化剂中的调动PFAS主要是短链前体 (≤C7).
液体1D建模表明,在和条件下,PFAS从修改过的土壤中脱落的速度是有限的,长期模拟预测PFAS在40年后到达地下水.

结论:

在和条件下,PFAS从生物固体修改土壤入地下水是一个缓慢的,速度有限的过程.
对生物固体的长期土地应用可能会导致地下水中可检测到的PFAS度.
最佳管理实践应考虑多路径暴露,包括移动PFAS的土壤到地下水路径,以及不太移动PFAS的其他路径.

关键词:

两个站点的运输模型.生物固体是一种生物固体.这里是HYDRUS.泄漏泄漏是一种泄漏.在PFAS中,我们可以使用PFAS.有限速率的脱吸.

更多相关视频

Identifying Per- and Polyfluorinated Chemical Species with a Combined Targeted and Non-Targeted-Screening High-Resolution Mass Spectrometry Workflow

Identifying Per- and Polyfluorinated Chemical Species with a Combined Targeted and Non-Targeted-Screening High-Resolution Mass Spectrometry Workflow

Published on: April 18, 2019

Investigating Long-Distance Transport of Perfluoroalkyl Acids in Wheat via a Split-Root Exposure Technique

Investigating Long-Distance Transport of Perfluoroalkyl Acids in Wheat via a Split-Root Exposure Technique

Published on: September 28, 2022

相关概念视频

Microbial Bioremediation of Pesticides

Microbial Bioremediation of Pesticides

Pesticides often feature structurally complex chemical architectures, incorporating halogen groups and multiple aromatic rings. These characteristics confer high chemical stability, rendering many pesticides resistant to natural degradation processes. This resistance poses significant environmental concerns, as persistent pesticide residues can accumulate in ecosystems and affect non-target organisms.Despite the inherent stability of many pesticides, certain microorganisms possess the metabolic...

Bioplastics

Bioplastics

Bioplastics derived from microbial processes present a sustainable alternative to conventional petroleum-based plastics. Among these, polyhydroxyalkanoates (PHAs), particularly polyhydroxybutyrates (PHBs), have emerged as prominent candidates due to their biodegradability and biocompatibility. These polymers are synthesized by a variety of bacteria, such as Cupriavidus necator and Pseudomonas putida, which naturally accumulate PHAs as intracellular carbon and energy reserves, especially under...