Water involved in transformation of soil organo-mineral fractions during catalytic thermal desorption of dioxins-like polychlorinated biphenyls

IF 9.7 1区 环境科学与生态学 Q1 ENGINEERING, ENVIRONMENTAL
Juan Zhang, Xiaojun Liu, Jinhao Gao, Wei Guo, Jianfeng Zhang, Wentao Jiao
{"title":"Water involved in transformation of soil organo-mineral fractions during catalytic thermal desorption of dioxins-like polychlorinated biphenyls","authors":"Juan Zhang, Xiaojun Liu, Jinhao Gao, Wei Guo, Jianfeng Zhang, Wentao Jiao","doi":"10.1016/j.jclepro.2024.144543","DOIUrl":null,"url":null,"abstract":"To turn a disadvantage into an advantage for clay soils with strong water retention, it necessitates water-activation-facilitated reductive thermal desorption (TD) of dioxins-like polychlorinated biphenyls (dl-PCBs). The acidic clay soil with abundant clay minerals (CH) and basic clay soil with unique K<sub>2</sub>O (CL) were supplemented with CaO-based additives, against nano<strong>-</strong>Fe<sup>0</sup> (NZVI) and plasmonic nano-TiN with good hydride ion conductivities. As regards to molecular configurations of dl-PCBs, the high-efficiently removed heptachlorobiphenyl and instead refractory tetrachlorobiphenyl were identified by TD pilot study without water activation, which was further certificated via calculated dechlorination pathways. The TD results and theoretical calculations revealed that naturally occurring K<sub>2</sub>O induced water activation in CL rather than water-suppressed TD in CH. And water was involved in electron transfer of deoxygenation-aromatization process at the soil organo-mineral interface during catalyst-enhanced TD with removal efficiencies increment of 59.1% in CH, which was firstly characterized by X-ray diffraction (XRD) and Fourier transform infrared (FTIR) analyses. Interestingly, the NZVI and the plasmonic nano-TiN facilitated selective aromatization of epoxide and C-heteroatom groups in CH, as opposed to selective esterification and epoxidation of aliphatic C-O groups in CL, and detailed transformation mechanisms of soil organic carbon were revealed by X-ray photoelectron spectroscopy (XPS).","PeriodicalId":349,"journal":{"name":"Journal of Cleaner Production","volume":"201 1","pages":""},"PeriodicalIF":9.7000,"publicationDate":"2024-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Cleaner Production","FirstCategoryId":"93","ListUrlMain":"https://doi.org/10.1016/j.jclepro.2024.144543","RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, ENVIRONMENTAL","Score":null,"Total":0}
引用次数: 0

Abstract

To turn a disadvantage into an advantage for clay soils with strong water retention, it necessitates water-activation-facilitated reductive thermal desorption (TD) of dioxins-like polychlorinated biphenyls (dl-PCBs). The acidic clay soil with abundant clay minerals (CH) and basic clay soil with unique K2O (CL) were supplemented with CaO-based additives, against nano-Fe0 (NZVI) and plasmonic nano-TiN with good hydride ion conductivities. As regards to molecular configurations of dl-PCBs, the high-efficiently removed heptachlorobiphenyl and instead refractory tetrachlorobiphenyl were identified by TD pilot study without water activation, which was further certificated via calculated dechlorination pathways. The TD results and theoretical calculations revealed that naturally occurring K2O induced water activation in CL rather than water-suppressed TD in CH. And water was involved in electron transfer of deoxygenation-aromatization process at the soil organo-mineral interface during catalyst-enhanced TD with removal efficiencies increment of 59.1% in CH, which was firstly characterized by X-ray diffraction (XRD) and Fourier transform infrared (FTIR) analyses. Interestingly, the NZVI and the plasmonic nano-TiN facilitated selective aromatization of epoxide and C-heteroatom groups in CH, as opposed to selective esterification and epoxidation of aliphatic C-O groups in CL, and detailed transformation mechanisms of soil organic carbon were revealed by X-ray photoelectron spectroscopy (XPS).

Abstract Image

二恶英类多氯联苯催化热解吸过程中土壤有机矿物组分转化过程中的水
对于保水能力强的粘土,要将其劣势转化为优势,就需要水活化促进二恶英样多氯联苯(dl-PCBs)的还原性热脱附(TD)。在黏土矿物丰富的酸性粘土(CH)和K2O独特的碱性粘土(CL)中添加cao基添加剂,对抗氢化物离子电导率良好的纳米fe0 (NZVI)和等离子体纳米tin。在dl- pcb的分子构型方面,在没有水活化的情况下,通过TD中试研究确定了高效去除的七氯联苯和难降解的四氯联苯,并通过计算的脱氯途径进一步证实了这一点。通过x射线衍射(XRD)和傅里叶变换红外(FTIR)分析,首次证实了K2O对土壤有机-矿物界面的脱氧-芳化过程有电子转移作用,对土壤有机-矿物界面的去除率提高了59.1%。有趣的是,NZVI和等离子体纳米tin促进了CH中环氧化物和c -杂原子基团的选择性芳构化,而不是CL中脂肪族C-O基团的选择性酯化和环氧化,并通过x射线光电子能谱(XPS)揭示了土壤有机碳的详细转化机制。
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
Journal of Cleaner Production
Journal of Cleaner Production 环境科学-工程:环境
CiteScore
20.40
自引率
9.00%
发文量
4720
审稿时长
111 days
期刊介绍: The Journal of Cleaner Production is an international, transdisciplinary journal that addresses and discusses theoretical and practical Cleaner Production, Environmental, and Sustainability issues. It aims to help societies become more sustainable by focusing on the concept of 'Cleaner Production', which aims at preventing waste production and increasing efficiencies in energy, water, resources, and human capital use. The journal serves as a platform for corporations, governments, education institutions, regions, and societies to engage in discussions and research related to Cleaner Production, environmental, and sustainability practices.
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术官方微信