The competitive adsorption of phenanthrene and benzo[a]pyrene by fractionated soil particles in individual and coexistence pollution

IF 6.1 2区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Ecotoxicology and Environmental Safety Pub Date : 2025-10-01 DOI:10.1016/j.ecoenv.2025.119073

Mingyue Qi , Guohui Ning , Xiaomin Wang , Meng Zhang , Meng Liu , Jiahui Li , Jiayuan Gao , Guangwei Zhang , Rui Hao , Xuefeng Zhao , Zhixin Yang

{"title":"The competitive adsorption of phenanthrene and benzo[a]pyrene by fractionated soil particles in individual and coexistence pollution","authors":"Mingyue Qi , Guohui Ning , Xiaomin Wang , Meng Zhang , Meng Liu , Jiahui Li , Jiayuan Gao , Guangwei Zhang , Rui Hao , Xuefeng Zhao , Zhixin Yang","doi":"10.1016/j.ecoenv.2025.119073","DOIUrl":null,"url":null,"abstract":"<div><div>Two polycyclic aromatic hydrocarbons (PAHs), benzo[<em>a</em>]pyrene (BaP) and phenanthrene (Phe), were added alone and in combination to unfractionated and fractionated soil (fine sand, silt, clay) in batch equilibrium experiments to determine their adsorption. The maximum adsorption capacity increased with initial concentrations for both PAHs, with a stronger increase for BaP. The BaP adsorption capacity was promoted by coexistence of Phe, but Phe adsorption capacity was inhibited by coexistence of BaP. Their adsorption isotherms during coexistence best fitted the Freundlich equation, giving a lesser fit with a linear equation that improved by coexistence. The <em>n</em> of the Phe isotherm in coexistence with BaP wasclose to 1 for the fine sand and silt. The adsorption of Phe and BaP was strongest in clay, followed by fine sand and then silt. Single Phe adsorption in clay was 23.82∼61.33 % higher than in fine sand and silt, and for BaP it was 5.78∼8.35 % higher. In silt, the Phe adsorption efficiency was reduced by 39.73 % in coexistence with BaP, while the BaP adsorption efficiency improved with 19.69 % in coexistence. Coexistence triggered a mechanistic redistribution: it weakened Phe partitioning, while it strengthened BaP surface adsorption. The adsorption behavior of these PAHs in coexistence for different soil fractions provides insights for optimal remediation strategies of PAH-contaminated soils.</div></div>","PeriodicalId":303,"journal":{"name":"Ecotoxicology and Environmental Safety","volume":"304 ","pages":"Article 119073"},"PeriodicalIF":6.1000,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Ecotoxicology and Environmental Safety","FirstCategoryId":"93","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0147651325014186","RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENVIRONMENTAL SCIENCES","Score":null,"Total":0}

引用次数: 0

Abstract

Two polycyclic aromatic hydrocarbons (PAHs), benzo[a]pyrene (BaP) and phenanthrene (Phe), were added alone and in combination to unfractionated and fractionated soil (fine sand, silt, clay) in batch equilibrium experiments to determine their adsorption. The maximum adsorption capacity increased with initial concentrations for both PAHs, with a stronger increase for BaP. The BaP adsorption capacity was promoted by coexistence of Phe, but Phe adsorption capacity was inhibited by coexistence of BaP. Their adsorption isotherms during coexistence best fitted the Freundlich equation, giving a lesser fit with a linear equation that improved by coexistence. The n of the Phe isotherm in coexistence with BaP wasclose to 1 for the fine sand and silt. The adsorption of Phe and BaP was strongest in clay, followed by fine sand and then silt. Single Phe adsorption in clay was 23.82∼61.33 % higher than in fine sand and silt, and for BaP it was 5.78∼8.35 % higher. In silt, the Phe adsorption efficiency was reduced by 39.73 % in coexistence with BaP, while the BaP adsorption efficiency improved with 19.69 % in coexistence. Coexistence triggered a mechanistic redistribution: it weakened Phe partitioning, while it strengthened BaP surface adsorption. The adsorption behavior of these PAHs in coexistence for different soil fractions provides insights for optimal remediation strategies of PAH-contaminated soils.

查看原文本刊更多论文

分离土壤颗粒对菲和苯并[a]芘在个别和共存污染中的竞争吸附

在批量平衡实验中，分别将苯并[a]芘（BaP）和菲（Phe）两种多环芳烃（PAHs）单独和联合添加到未分馏和分馏土壤（细砂、淤泥、粘土）中，以测定它们的吸附量。两种多环芳烃的最大吸附量随着初始浓度的增加而增加，其中对BaP的增加更大。苯丙氨酸的共存促进了苯丙氨酸的吸附能力，而苯丙氨酸的共存抑制了苯丙氨酸的吸附能力。它们在共存期间的吸附等温线最符合Freundlich方程，与线性方程的拟合程度较低，但由于共存而得到改善。细沙和粉土中与BaP共存的Phe等温线n接近 - 1。对苯丙酚和苯丙酚的吸附在粘土中最强，其次是细砂，最后是淤泥。单Phe在粘土中的吸附比在细砂和粉土中高出23.82 ~ 61.33 %，在BaP中高出5.78 ~ 8.35 %。在淤泥中，与BaP共存时，苯丙氨酸吸附效率降低39.73 %，与BaP共存时，苯丙氨酸吸附效率提高19.69 %。共存引发了机械性的再分配：它削弱了Phe的分配，同时加强了BaP的表面吸附。这些多环芳烃在不同土壤组分中共存的吸附行为为多环芳烃污染土壤的最佳修复策略提供了见解。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Ecotoxicology and Environmental Safety 环境科学-毒理学

CiteScore

12.10

自引率

5.90%

发文量

1234

审稿时长

88 days

期刊介绍： Ecotoxicology and Environmental Safety is a multi-disciplinary journal that focuses on understanding the exposure and effects of environmental contamination on organisms including human health. The scope of the journal covers three main themes. The topics within these themes, indicated below, include (but are not limited to) the following: Ecotoxicology、Environmental Chemistry、Environmental Safety etc.