In situ phytoremediation of polycyclic aromatic hydrocarbon-contaminated agricultural greenhouse soil using celery. Issue 21 (19th September 2021)

• Record Type: Journal Article
• Authors: Zheng, Xuehao; Ding, Hui; Xu, Ximeng; Liang, Benqiang; Liu, Xingyi; Zhao, Dan; Sun, Lina
• Is Part Of: Environmental technology. Volume 42:Issue 21(2021)
• Page Start: 3329
• Page End: 3337
• Publication Date: 2021-09-19
• Subjects: Celery -- Phytoremediation -- PAH-contaminated agricultural field -- Polyphenol oxidase -- Culturable microbial population; Environmental engineering -- Periodicals; Environmental protection -- Periodicals; 628.05
• DOI: 10.1080/09593330.2020.1727022
• Languages: English
• ISSNs: 0959-3330

Abstract

ABSTRACT: Although celery has been established as an effective plant in the remediation of organic pollutant-contaminated soil, few studies have investigated the associated biological processes in rhizosphere and the effect of celery on agricultural field remediation in situ . In this study, a polycyclic aromatic hydrocarbon (PAH)-contaminated agricultural greenhouse was used as the experimental site, and three celery species ( Apium graveolens L., Oenanthe javanica (Blume) DC., Libanotis seseloides (Fisch. & C.A. Mey. ex Turcz.) Turcz . ) were applied for in situ remediation. After 90 days, the PAH dissipation rate of the L. seseloides treatment was highest (50.21%), and most of the PAHs were limited to its roots (translocation factor 0.516). This suggested that L. seseloides is a potential species for phytoremediation coupled with agro-production. The culturable microbial population and invertase activity results strongly supported that O. javanica is suitable for the establishment of exogenous bacteria–celery co-remediation techniques. Pearson's correlation analysis showed that the polyphenol oxidase (PPO) activity was highly significantly positively correlated with the PAH dissipation rate ( r = 0.984, P < 0.01), and we suggest that PPO can be used as a microecological index during PAH remediation. GRAPHICAL ABSTRACT: UF0001