Adsorption characteristics of perfluorooctanoic acid (PFOA) and perfluorooctanesulfonic acid (PFOS) in granular activated carbon (GAC) and modified GAC

IF 3.8 4区环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES

Water, Air, & Soil Pollution Pub Date : 2025-03-31 DOI:10.1007/s11270-025-07908-0

Jeongwoo Shin, Byungryul An

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Abstract

The individual adsorption behaviors of perfluorooctanoic acid (PFOA) and perfluorooctanesulfonic acid (PFOS) were investigated and compared using granular activated carbon (GAC) and copper modified GAC (GAC–Cu) through batch experiments. Scanning electron microscopy–energy dispersive X-ray spectroscopy (SEM–EDS) analysis revealed that the Cu content (atomic wt. %) in GAC–Cu was 2.91 times higher than that in GAC, while the oxygen/carbon (O/C) ratio was similar, confirming that the surface of GAC has been changed by Cu. The increase in maximum uptake (q_m) calculated from Langmuir isotherm model, was 52.7% and 51.9% for GAC and 90.0% and 99.7% for GAC–Cu, respectively, for PFOS and PFOA. GAC–Cu exhibited higher q_m than GAC, with an increase of 23.6% and 44.6% for PFOA and PFOS, respectively. Adsorption capacity decreased with increasing initial solution pH, and the effect of Cu disappeared at a basic pH of 8.5. Kinetic experiments and model results demonstrated that the values of k₁ and k₂, coefficients of adsorption rate, for PFOS and GAC–Cu increased by 101–197% and 13.2–55.9%, respectively.

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来源期刊

Water, Air, & Soil Pollution 环境科学-环境科学

CiteScore

4.50

自引率

6.90%

发文量

448

审稿时长

2.6 months

期刊介绍： Water, Air, & Soil Pollution is an international, interdisciplinary journal on all aspects of pollution and solutions to pollution in the biosphere. This includes chemical, physical and biological processes affecting flora, fauna, water, air and soil in relation to environmental pollution. Because of its scope, the subject areas are diverse and include all aspects of pollution sources, transport, deposition, accumulation, acid precipitation, atmospheric pollution, metals, aquatic pollution including marine pollution and ground water, waste water, pesticides, soil pollution, sewage, sediment pollution, forestry pollution, effects of pollutants on humans, vegetation, fish, aquatic species, micro-organisms, and animals, environmental and molecular toxicology applied to pollution research, biosensors, global and climate change, ecological implications of pollution and pollution models. Water, Air, & Soil Pollution also publishes manuscripts on novel methods used in the study of environmental pollutants, environmental toxicology, environmental biology, novel environmental engineering related to pollution, biodiversity as influenced by pollution, novel environmental biotechnology as applied to pollution (e.g. bioremediation), environmental modelling and biorestoration of polluted environments. Articles should not be submitted that are of local interest only and do not advance international knowledge in environmental pollution and solutions to pollution. Articles that simply replicate known knowledge or techniques while researching a local pollution problem will normally be rejected without review. Submitted articles must have up-to-date references, employ the correct experimental replication and statistical analysis, where needed and contain a significant contribution to new knowledge. The publishing and editorial team sincerely appreciate your cooperation. Water, Air, & Soil Pollution publishes research papers; review articles; mini-reviews; and book reviews.