Greening the earth, healing the soil: A comprehensive life cycle assessment of phytoremediation for heavy metal contamination

Abstract

Soil pollution, particularly from heavy metals, presents significant challenges for researchers and activists seeking ecologically benign, cost-effective, technically applicable, and straightforward approaches to decontamination. The selection of the most suitable method for soil cleaning necessitates a comprehensive framework that considers these crucial factors, as an inappropriate choice can lead to environmental repercussions, along with wasted time and resources. In this study, we aim to compare the effectiveness of different soil remediation methods for heavy metal contamination, focusing specifically on phytoremediation. Furthermore, we employ life cycle impact assessment as a valuable tool to estimate and calculate the environmental effects associated with the entire life cycle of these methods, encompassing factors such as climate change, eutrophication, ozone layer depletion, smoke and fog formation, water and land consumption, toxic pressure on ecosystems and human health, as well as resource depletion. The findings demonstrate the immense potential of phytoremediation as a promising technology for effectively eliminating heavy metals from contaminated soils. Moreover, this approach proves to be efficient, cost-effective, and environmentally friendly, offering a viable solution for addressing the pressing global concern of heavy metal pollution in soil. By considering the four key steps of the life cycle assessment framework – Goal Definition and Scope, Life Cycle Inventory, Life Cycle Impact Assessment, and Life Cycle Interpretation – we provide a comprehensive analysis of the environmental implications associated with soil remediation methods. This research contributes new insights to the field, guiding researchers, activists, and policymakers in the development of sustainable strategies to combat soil pollution and preserve the environment.

Topics & Concepts