Optimizing Heavy Metal Uptake in Through Electrokinetic Treatment: A Comprehensive Study on Phytoremediation from Mine Tailings

Overview

Journal Toxics

Date 2025 Jan 8

PMID 39771075

Authors

Yasna Tapia

Osvaldo Salazar

Oscar Seguel

Jonathan Suazo-Hernandez

Diego Urdiales-Flores

Humberto Aponte

Cristian Urdiales

Affiliations

Soon will be listed here.

Abstract

Copper mining drives economic growth, with the global demand expected to reach 120 million metric tons annually by 2050. However, mining produces tailings containing heavy metals (HMs), which poses environmental risks. This study investigated the efficacy of phytoremediation (Phy) combined with electrokinetic treatment (EKT) to increase metal uptake in grown in tailings from the Metropolitan Region of Chile. The plants were exposed to varying voltages and treatment durations. In the control (no EKT), the root metal contents were Fe (1008.41 mg/kg) > Cu (176.38 mg/kg) > Mn (103.73 mg/kg) > Zn (30.26 mg/kg), whereas in the shoots, the order was Mn (48.69 mg/kg) > Cu (21.14 mg/kg) > Zn (17.67 mg/kg) > Fe (27.32 mg/kg). The optimal EKT (15 V for 8 h) significantly increased metal uptake, with roots accumulating Fe (5997.24 mg kg) > Mn (672 mg kg) > Cu (547.68 mg kg) > Zn (90.99 mg kg), whereas shoots contained Fe (1717.95 mg kg) > Mn (930 mg kg) > Cu (219.47 mg kg) > Zn (58.48 mg kg). Although EKT enhanced plant growth and biomass, higher voltages stressed the plants. Longer treatments were more effective, suggesting that EK-Phy is a promising method for remediating metal-contaminated tailings.

References

Chen Y, Dong M, Lyu P, Wang A, Wang H, Li J . Analysis of metal(loid) pollution and possibilities of electrokinetic phytoremediation of abandoned coking plant soil. Sci Total Environ. 2023; 870:161982. DOI: 10.1016/j.scitotenv.2023.161982. View

Zeng H, Wu H, Yan F, Yi K, Zhu Y . Molecular regulation of zinc deficiency responses in plants. J Plant Physiol. 2021; 261:153419. DOI: 10.1016/j.jplph.2021.153419. View

Hosseinniaee S, Jafari M, Tavili A, Zare S, Cappai G . Investigating metal pollution in the food chain surrounding a lead-zinc mine (Northwestern Iran); an evaluation of health risks to humans and animals. Environ Monit Assess. 2023; 195(8):946. DOI: 10.1007/s10661-023-11551-9. View

Carkovic A, Calcagni M, Vega A, Coquery M, Moya P, Bonilla C . Active and legacy mining in an arid urban environment: challenges and perspectives for Copiapó, Northern Chile. Environ Geochem Health. 2016; 38(4):1001-14. DOI: 10.1007/s10653-016-9793-5. View

Nieva N, Borgnino L, Garcia M . Long term metal release and acid generation in abandoned mine wastes containing metal-sulphides. Environ Pollut. 2018; 242(Pt A):264-276. DOI: 10.1016/j.envpol.2018.06.067. View

Ramirez M, Massolo S, Frache R, Correa J . Metal speciation and environmental impact on sandy beaches due to El Salvador copper mine, Chile. Mar Pollut Bull. 2005; 50(1):62-72. DOI: 10.1016/j.marpolbul.2004.08.010. View

Munir M, Irshad S, Yousaf B, Ali M, Dan C, Abbas Q . Interactive assessment of lignite and bamboo-biochar for geochemical speciation, modulation and uptake of Cu and other heavy metals in the copper mine tailing. Sci Total Environ. 2021; 779:146536. DOI: 10.1016/j.scitotenv.2021.146536. View

Kumar S, Prasad S, Yadav K, Shrivastava M, Gupta N, Nagar S . Hazardous heavy metals contamination of vegetables and food chain: Role of sustainable remediation approaches - A review. Environ Res. 2019; 179(Pt A):108792. DOI: 10.1016/j.envres.2019.108792. View

Munir M, Liu G, Yousaf B, Ali M, Abbas Q, Ullah H . Synergistic effects of biochar and processed fly ash on bioavailability, transformation and accumulation of heavy metals by maize (Zea mays L.) in coal-mining contaminated soil. Chemosphere. 2019; 240:124845. DOI: 10.1016/j.chemosphere.2019.124845. View

10.

Wang Z, Jackson L, Jablonski J . Factors Affecting the Levels of Heavy Metals in Juices Processed with Filter Aids. J Food Prot. 2017; 80(6):892-902. DOI: 10.4315/0362-028X.JFP-16-464. View

11.

Aponte H, Sulbaran-Bracho Y, Mondaca P, Vidal C, Perez R, Meier S . Biochemical, Catabolic, and PGP Activity of Microbial Communities and Bacterial Strains from the Root Zone of in a Mediterranean Mine Tailing. Microorganisms. 2023; 11(11). PMC: 10673359. DOI: 10.3390/microorganisms11112639. View

12.

Guo J, Lv X, Jia H, Hua L, Ren X, Muhammad H . Effects of EDTA and plant growth-promoting rhizobacteria on plant growth and heavy metal uptake of hyperaccumulator Sedum alfredii Hance. J Environ Sci (China). 2019; 88:361-369. DOI: 10.1016/j.jes.2019.10.001. View

13.

Cameselle C, Chirakkara R, Reddy K . Electrokinetic-enhanced phytoremediation of soils: status and opportunities. Chemosphere. 2013; 93(4):626-36. DOI: 10.1016/j.chemosphere.2013.06.029. View

14.

Yin F, Li J, Wang Y, Yang Z . Biodegradable chelating agents for enhancing phytoremediation: Mechanisms, market feasibility, and future studies. Ecotoxicol Environ Saf. 2024; 272:116113. DOI: 10.1016/j.ecoenv.2024.116113. View

15.

Stauber J, Andrade S, Ramirez M, Adams M, Correa J . Copper bioavailability in a coastal environment of Northern Chile: comparison of bioassay and analytical speciation approaches. Mar Pollut Bull. 2005; 50(11):1363-72. DOI: 10.1016/j.marpolbul.2005.05.008. View

16.

Seck G, Hache E, Bonnet C, Simoen M, Carcanague S . Copper at the crossroads: Assessment of the interactions between low-carbon energy transition and supply limitations. Resour Conserv Recycl. 2020; 163:105072. PMC: 7391239. DOI: 10.1016/j.resconrec.2020.105072. View

17.

Wang L, Ji B, Hu Y, Liu R, Sun W . A review on in situ phytoremediation of mine tailings. Chemosphere. 2017; 184:594-600. DOI: 10.1016/j.chemosphere.2017.06.025. View

18.

Liu X, Song Q, Tang Y, Li W, Xu J, Wu J . Human health risk assessment of heavy metals in soil-vegetable system: a multi-medium analysis. Sci Total Environ. 2013; 463-464:530-40. DOI: 10.1016/j.scitotenv.2013.06.064. View

19.

Doku E, Sylverken A, Belford J . Rhizosphere microbiome of plants used in phytoremediation of mine tailing dams. Int J Phytoremediation. 2024; 26(8):1212-1220. DOI: 10.1080/15226514.2024.2301994. View

20.

Clemens S, Weber M . The essential role of coumarin secretion for Fe acquisition from alkaline soil. Plant Signal Behav. 2015; 11(2):e1114197. PMC: 4883844. DOI: 10.1080/15592324.2015.1114197. View