| Title | Bio-chelate assisted leaching for enhanced heavy metal remediation in municipal solid waste compost |
|---|---|
| ID_Doc | 16916 |
| Authors | Khare, S; Singhal, A; Rallapalli, S; Mishra, A |
| Title | Bio-chelate assisted leaching for enhanced heavy metal remediation in municipal solid waste compost |
| Year | 2024 |
| Published | Scientific Reports, 14, 1 |
| Abstract | Municipal solid waste compost, the circular economy's closed-loop product often contains excessive amounts of toxic heavy metals, leading to market rejection and disposal as waste material. To address this issue, the study develops a novel approach based on: (i) utilizing plant-based biodegradable chelating agent, l-glutamic acid, N,N-diacetic acid (GLDA) to remediate heavy metals from contaminated MSW compost, (ii) comparative assessment of GLDA removal efficiency at optimal conditions with conventional nonbiodegradable chelator EDTA, and (iii) enhanced pre- and post-leaching to evaluate the mobility, toxicity, and bioavailability of heavy metals. The impact of treatment variables, such as GLDA concentration, pH, and retention time, on the removal of heavy metals was investigated. The process was optimized using response surface methodology to achieve the highest removal effectiveness. The findings indicated that under optimal conditions (GLDA concentration of 150 mM, pH of 2.9, retention time for 120 min), the maximum removal efficiencies were as follows: Cd-90.32%, Cu-81.96%, Pb-91.62%, and Zn-80.34%. This process followed a pseudo-second-order kinetic equation. Following GLDA-assisted leaching, the geochemical fractions were studied and the distribution highlighted Cd, Cu, and Pb's potential remobilization in exchangeable fractions, while Zn displayed integration with the compost matrix. GLDA-assisted leaching and subsequent fractions illustrated transformation and stability. Therefore, this process could be a sustainable alternative for industrial applications (agricultural fertilizers and bioenergy) and social benefits (waste reduction, urban landscaping, and carbon sequestration) as it has controlled environmental footprints. Hence, the proposed remediation strategy, chemically assisted leaching, could be a practical option for extracting heavy metals from MSW compost, thereby boosting circular economy. |
| https://www.nature.com/articles/s41598-024-65280-1.pdf |
Similar Articles
| ID | Score | Article |
|---|---|---|
27581
|
Ramisio, PJ; Bento, F; Geraldo, D; Andrade, O; Bettencourt, AP Evaluation of Municipal Waste Compost in Relation to the Environmental Retention of Heavy Metals(2023)Sustainability, 15.0, 23 | |
| 10319
|
Coltro, GM; Lima, JZ; Pejon, OJ; Rodrigues, VGS ACTIVATION OF ORGANIC COMPOST WITH PHOSPHORIC ACID AND THE EFFECTS ON Pb AND Cd ADSORPTION.(2023)Quimica Nova, 46, 9 | |
| 22055
|
Abidli, A; Huang, YF; Ben Rejeb, Z; Zaoui, A; Park, CB Sustainable and efficient technologies for removal and recovery of toxic and valuable metals from wastewater: Recent progress, challenges, and future(2022) | |
| 9956
|
Simón, D; Palet, C; Costas, A; Cristóbal, A Agro-Industrial Waste as Potential Heavy Metal Adsorbents and Subsequent Safe Disposal of Spent Adsorbents(2022)Water, 14.0, 20 | |
| 6451
|
Hossain, N; Bhuiyan, MA; Pramanik, BK; Nizamuddin, S; Griffin, G Waste materials for wastewater treatment and waste adsorbents for biofuel and cement supplement applications: A critical review(2020) | |
| 13385
|
Bentley, MJ; Solomon, ME; Marten, BM; Shimabuku, KK; Cook, SM Evaluating landfill leachate treatment by organic municipal solid waste-derived biochar(2021)Environmental Science-Water Research & Technology, 7, 11 | |
| 12189
|
Czikkely, M; Oláh, J; Lakner, Z; Fogarassy, C; Popp, J Waste water treatment with adsorptions by mushroom compost The circular economic valuation concept for material cycles(2018) | |
| 29619
|
Rendón-Castrillón, L; Ramírez-Carmona, M; Ocampo-López, C; Gómez-Arroyave, L Bioleaching Techniques for Sustainable Recovery of Metals from Solid Matrices(2023)Sustainability, 15.0, 13 | |
| 2122
|
Madela, M; Skuza, M Towards a Circular Economy: Analysis of the Use of Biowaste as Biosorbent for the Removal of Heavy Metals(2021)Energies, 14, 17 | |
| 23645
|
Lee, H; Coulon, F; Beriro, DJ; Wagland, ST Increasing recovery opportunities of metal(loid)s from municipal solid waste via landfill leachate recirculation(2023) |