Season-based phytoremediation potential of brown mustard for lead decontamination: effect of EDTA chelation and antioxidant enzyme activity.

IF 3.4 4区 环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES
Deqiang Chen, Muhammad Ibrahim, Mara Soroma, Hafsat Alhassan Danjaji, Adam Umar Jibo, Ying Yang
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Abstract

Phytoremediation technology is an environmentally benign, potent, and cost-effective approach for treating contaminated ecological sites. To yield a worthwhile remediation performance, phytoremediation technology involves amalgamating multifarious techniques and strategies. The primary objective of this research was to look into the effects of seasonal changes, contamination level, and EDTA chelation on Brown mustard's potential to extract Lead (Pb) from synthetically contaminated soil and its response to antioxidant enzyme activity. Soil samples containing 5 mg kg-1 of EDTA were spiked with 200, 500, and 1000 mg kg-1 of Pb, while the control group (unspiked) without EDTA addition was used. The results indicated that adding EDTA in winter (winter + EDTA) significantly increased (p < 0.05) plant growth by 18.83%. Observing the seasonal variation, the removal efficiency of Pb was achieved in this order: summer + EDTA > winter + EDTA > summer + No EDTA > winter + No EDTA. The results also showed that the removal rate had improved up to 52.53% as the concentration of Pb rose from 67 to 500 mg kg-1 but showed a decline after reaching 1000 mg kg-1, indicating a maximum Pb stress level. Additionally, the EDTA chelation during winter demonstrated a significant effect on the ability of Brown mustard to accumulate higher levels of Pb in both roots and leaves, with 500 mg kg-1 as the optimal level taken by the plant throughout the experiment. Except for CAT, the increased enzyme activities were observed under EDTA chelation while Pb-stress (1000 mg kg-1) reduced the enzyme activities by over 4%. The findings suggest that having 143 U/g CAT, 285 U/g SOD, and 14.9 U/g MDA in the summer season with EDTA amendments were the most suitable recourse for decontamination of Pb-polluted soil compared to a single-factor treatment.

棕芥对铅污染的季节性植物修复潜力:EDTA螯合和抗氧化酶活性的影响。
植物修复技术是一种对环境无害、有效且经济有效的处理污染生态场所的方法。为了获得有价值的修复效果,植物修复技术涉及多种技术和策略的融合。研究季节变化、污染水平和EDTA螯合作用对褐芥从综合污染土壤中提取铅的影响及其对抗氧化酶活性的响应。在含有5 mg kg-1 EDTA的土壤样品中分别添加200、500和1000 mg kg-1 Pb,而不添加EDTA的对照组(未添加EDTA)。结果表明:冬季添加EDTA(冬季+ EDTA)显著增加(p冬季+ EDTA >夏季+不添加EDTA >冬季+不添加EDTA);铅浓度从67 mg kg-1增加到500 mg kg-1时,去除率提高到52.53%,但在1000 mg kg-1时,去除率下降,表明Pb胁迫水平达到最大值。此外,EDTA在冬季的螯合作用对褐芥根和叶片中Pb积累的能力有显著影响,在整个试验中,植物以500 mg kg-1为最佳水平。除CAT外,EDTA螯合使酶活性升高,pb胁迫(1000 mg kg-1)使酶活性降低4%以上。研究结果表明,与单因素处理相比,EDTA在夏季处理143u /g CAT、285u /g SOD和14.9 U/g MDA是最合适的去污土壤资源。
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来源期刊
International Journal of Phytoremediation
International Journal of Phytoremediation 环境科学-环境科学
CiteScore
7.60
自引率
5.40%
发文量
145
审稿时长
3.4 months
期刊介绍: The International Journal of Phytoremediation (IJP) is the first journal devoted to the publication of laboratory and field research describing the use of plant systems to solve environmental problems by enabling the remediation of soil, water, and air quality and by restoring ecosystem services in managed landscapes. Traditional phytoremediation has largely focused on soil and groundwater clean-up of hazardous contaminants. Phytotechnology expands this umbrella to include many of the natural resource management challenges we face in cities, on farms, and other landscapes more integrated with daily public activities. Wetlands that treat wastewater, rain gardens that treat stormwater, poplar tree plantings that contain pollutants, urban tree canopies that treat air pollution, and specialized plants that treat decommissioned mine sites are just a few examples of phytotechnologies.
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