Remediation of PFAS-Contaminated Soil and Granular Activated Carbon by Smouldering Combustion.
Remediation of PFAS-Contaminated Soil and Granular Activated Carbon by Smouldering Combustion.
复制标题
通过阴燃燃烧修复 PFAS 污染的土壤和颗粒活性炭。
DOI：
--
复制
发表时间：
2020
影响因子：
11.4
通讯作者：
J. Gerhard
中科院分区：
文献类型：
--
作者：
A. L. Duchesne;Joshua K. Brown;D. Patch;D. Major;K. Weber;J. Gerhard
本研究探讨了阴燃法修复PFAS污染的颗粒活性炭（GAC）和PFAS污染土壤。活性炭，无论是新鲜的和PFAS负载，作为辅助燃料支持阴燃的混合物与干净的沙子（175毫克PFAS/公斤），与PFAS加标，实验室建造的土壤（144毫克PFAS/公斤），并与PFAS影响的领域土壤（0.2毫克PFAS/公斤）。PFAS和氟的命运是量化的土壤和排放分析，包括有针对性和非目标PFAS以及氟化氢和总有机氟。结果表明，超过35克活性炭/公斤土壤导致自持续阴燃温度超过900摄氏度。处理后的PFAS浓度的处理土壤接近（2个实验）或低于（7个实验）的检测限（0.0005毫克/公斤）。GAC上44%的初始PFAS完全被破坏，而土壤上的PFAS只有16%。在可定量分析套件中，GAC或土壤上的初始PFAS污染物中不到1%以PFAS化合物的形式排放。结果表明，其余的被排放的改变，短链PFAS和挥发性氟化化合物，这是有效地与GAC擦洗。总有机氟分析被证明是有用的PFAS负载活性炭在沙子中，但分析土壤遭受非PFAS化合物的干扰。总体而言，这项研究表明，阴燃作为一种有效的修复技术PFAS影响的土壤和PFAS负载活性炭具有显着的潜力。
This study explored smouldering combustion for remediating PFAS-impacted granular activated carbon (GAC) and PFAS-contaminated soil. GAC, both fresh and PFAS-loaded, was employed as the supplemental fuel supporting smouldering in mixtures with clean sand (≈175 mg PFAS/kg), with PFAS-spiked, laboratory-constructed soil (≈4 mg PFAS/kg), and with a PFAS-impacted field soil (≈0.2 mg PFAS/kg). The fate of PFAS and fluorine was quantified with soil and emissions analyses, including targeted and non-targeted PFAS as well as hydrogen fluoride and total organic fluorine. Results demonstrated that exceeding 35 g GAC/kg soil resulted in self-sustained smouldering with temperatures exceeding 900˚C. Post-treatment PFAS concentrations of the treated soil were near (2 experiments) or below (7 experiments) detection limits (0.0005 mg/kg). 44% of the initial PFAS on GAC underwent full destruction, compared to 16% of the PFAS on soil. Less than 1% of the initial PFAS contamination on GAC or soil was emitted as PFAS compounds in the quantifiable analytical suite. Results suggest that the rest were emitted as altered, shorter-chain PFAS and volatile fluorinated compounds, which were scrubbed effectively with GAC. Total organic fluorine analysis proved useful for PFAS-loaded GAC in sand, however analyzing soils suffered from interference from non-PFAS compounds. Overall, this study demonstrated that smouldering has significant potential as an effective remediation technique for PFAS-impacted soils and PFAS-laden GAC.
影响因子：
9.5
作者：
Su, Yiming;Rao, Unnati;Jassby, David
通讯作者：
Jassby, David
DOI：
10.1016/j.scitotenv.2017.09.065
发表时间：
2018-02-01
期刊：
The Science of the total environment
影响因子：
--
作者：
Brusseau ML
通讯作者：
Brusseau ML