生物灾害科学2025，Vol.48Issue(3)：330-339,10.DOI:10.3969/j.issn.2095-3704.2025.03.42
多壁碳纳米管对土壤中二氯喹啉酸的吸附效应及辣椒生长的影响
Effects of multi-walled carbon nanotubes on the adsorption and immobilization of quinclorac residues in soil and on the pepper growth
摘要
Abstract
[Objective]This study aimed to investigate the remediation effects of multi-walled carbon nanotubes(CNT4 and CNT9)on quinclorac residues in soil and the mechanisms for alleviating phytotoxicity in pepper plants,thereby providing green technological support for farmland pollution control.[Method](1)Adsorption experiments:the Freundlich model was used to determine adsorption parameters of CNT4(specific surface area:300-410 m2/g)and CNT9(240-280 m2/g)for quinclorac;(2)Pot experiments:in quinclorac-contaminated soil(100 μg/kg),1%carbon nanotubes were added.Pepper cultivars"Xiangshiwuhao"and"Wannong 25"were cultivated.The leaf length,leaf width,plant height,and phytotoxicity symptoms were measured at 14,21,and 28 days after planting.[Result](1)Adsorption performance:freundlich adsorption coefficient of CNT4(Kf=146.9)was significantly higher than that of CNT9(Kf=70.29),representing a 119-fold increase compared to that in pristine soil;(2)Phytotoxicity remediation:after adding 1%carbon nanotubes,pepper leaf curling and growth stagnation were completely eliminated.The leaf length,width,and plant height in CNT4 and CNT9 treatment groups recovered to the control levels(e.g.,the inhibition rate of the leaf length in"Xiangshiwuhao"decreased from 86.42%to 0 at 28 days);(3)Growth promotion:under non-contaminated conditions,carbon nanotube treatments increased pepper biomass and enhanced leaf greening;(4)Tube diameter effects:CNT4 exhibited greater adsorption potentials due to its larger specific surface area.[Conclusion]Both multi-walled carbon nanotubes restore the growth parameters to the control levels.CNT4 demonstrates superior adsorption potentials owing to its larger specific surface area.Carbon nanotube reduces quinclorac bioavailability in soil through adsorption,thereby remediating phytotoxicity in peppers.关键词
多壁碳纳米管/吸附/二氯喹啉酸/辣椒药害/土壤修复Key words
multi-walled carbon nanotube/adsorption/quinclorac/pepper phytotoxicity/soil remediation分类
农业科技引用本文复制引用
罗越,郑千琦,陈良玉,方可爱,刘开林..多壁碳纳米管对土壤中二氯喹啉酸的吸附效应及辣椒生长的影响[J].生物灾害科学,2025,48(3):330-339,10.基金项目
湖南省科技创新人才计划项目(2024RC8178) （2024RC8178）
