Priya A K, Muruganandam Muthiah, Ali Sameh S, Kornaros Michael
Department of Chemical Engineering, KPR Institute of Engineering and Technology, Coimbatore 641407, India.
Project Prioritization, Monitoring & Evaluation and Knowledge Management Unit, ICAR-Indian Institute of Soil & Water Conservation (ICAR-IISWC), Dehradun 248195, India.
Toxics. 2023 May 2;11(5):422. doi: 10.3390/toxics11050422.
Pollution from heavy metals is one of the significant environmental concerns facing the world today. Human activities, such as mining, farming, and manufacturing plant operations, can allow them access to the environment. Heavy metals polluting soil can harm crops, change the food chain, and endanger human health. Thus, the overarching goal for humans and the environment should be the avoidance of soil contamination by heavy metals. Heavy metals persistently present in the soil can be absorbed by plant tissues, enter the biosphere, and accumulate in the trophic levels of the food chain. The removal of heavy metals from contaminated soil can be accomplished using various physical, synthetic, and natural remediation techniques (both and ). The most controllable (affordable and eco-friendly) method among these is phytoremediation. The removal of heavy metal defilements can be accomplished using phytoremediation techniques, including phytoextraction, phytovolatilization, phytostabilization, and phytofiltration. The bioavailability of heavy metals in soil and the biomass of plants are the two main factors affecting how effectively phytoremediation works. The focus in phytoremediation and phytomining is on new metal hyperaccumulators with high efficiency. Subsequently, this study comprehensively examines different frameworks and biotechnological techniques available for eliminating heavy metals according to environmental guidelines, underscoring the difficulties and limitations of phytoremediation and its potential application in the clean-up of other harmful pollutants. Additionally, we share in-depth experience of safe removing the plants used in phytoremediation-a factor frequently overlooked when choosing plants to remove heavy metals in contaminated conditions.
重金属污染是当今世界面临的重大环境问题之一。采矿、农业和制造工厂运营等人类活动会使重金属进入环境。污染土壤的重金属会损害农作物、改变食物链并危及人类健康。因此,人类和环境的首要目标应该是避免土壤被重金属污染。持续存在于土壤中的重金属会被植物组织吸收,进入生物圈并在食物链的营养级中积累。可以使用各种物理、化学和天然修复技术(包括 和 )从受污染土壤中去除重金属。其中最可控(经济且环保)的方法是植物修复。可以使用植物修复技术去除重金属污染物,包括植物提取、植物挥发、植物稳定和植物过滤。土壤中重金属的生物有效性和植物的生物量是影响植物修复效果的两个主要因素。植物修复和植物采矿的重点是高效的新型金属超富集植物。随后,本研究根据环境准则全面审视了可用于去除重金属的不同框架和生物技术,强调了植物修复的困难和局限性及其在清理其他有害污染物方面的潜在应用。此外,我们分享了安全移除植物修复中使用的植物的深入经验——这是在选择用于去除污染环境中重金属的植物时经常被忽视的一个因素。