Eco-Friendly Optimization of Landfill Leachate Treatment via Agricultural Waste-Derived Coagulants and Advanced Oxidation

Authors

  • Shabib Al Rashdi Mechanical and Chemical Engineering Department, National University of Science and Technology, Seeb, Oman
  • Nageswara Rao Lakkimsetty Department of Chemical and Petroleum Engineering, School of Engineering & Computing, American University of Ras Al Khaimah, Ras al Khaimah, United Arab Emirates
  • Eqlima Aflah Al Hinai Mechanical and Chemical Engineering Department, National University of Science and Technology, Seeb, Oman
  • Hala Ali Al Zaabi Mechanical and Chemical Engineering Department, National University of Science and Technology, Seeb, Oman
Volume: 15 | Issue: 5 | Pages: 27507-27512 | October 2025 | https://doi.org/10.48084/etasr.11324

Received: 6 April 2025 | Revised: 9 May 2025 and 22 May 2025 | Accepted: 31 May 2025 | Online: 4 September 2025


Corresponding author: Nageswara Rao Lakkimsetty

Abstract

Landfill Leachate (LL) presents a significant environmental concern, particularly in rapidly developing nations such as Oman, due to its high concentrations of persistent pollutants including ammonia (NH3), color-causing compounds, and organic matter. These contaminants are often resistant to removal by conventional treatment methods. This study aimed to develop an effective and eco-friendly treatment strategy for stabilized LL by integrating two processes: Persulfate Advanced Oxidation Processes (P-AOP) and Coagulation-Flocculation (C-F). The specific objectives were to: i) extract natural coagulants from date pits using the Soxhlet method, ii) enhance pollutant removal through the combined P-AOP and C–F approach, and iii) optimize the process using Response Surface Methodology (RSM). The hybrid treatment method achieved high removal efficiencies: 96% for color, 60% for NH3, and 74% for Chemical Oxygen Demand (COD). Additionally, a 12.433×103% increase in Total Suspended Solids (TSS) was observed, attributed to floc formation, which signifies effective coagulation. These findings confirm the potential of the integrated approach and highlight the feasibility of using date pits as a sustainable alternative to chemical coagulants.

Keywords:

landfill leachate, catechin tannins, coagulation-flocculation, persulfate advanced oxidation, optimization

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Author Biography

Shabib Al Rashdi, Mechanical and Chemical Engineering Department, National University of Science and Technology, Seeb, Oman

 

 

References

S. S. Abu Amr, M. Y. D. Alazaiza, M. Jk. Bashir, A. F. M. Alkarkhi, and S. Q. Aziz, "The performance of S2O82−/ Zn2+ oxidation system in landfill leachate treatment," Physics and Chemistry of the Earth, Parts A/B/C, vol. 120, Dec. 2020, Art. no. 102944.

M. A. Alkhoori et al., "Biochemical Composition and Biological Activities of Date Palm (Phoenix dactylifera L.) Seeds: A Review," Biomolecules, vol. 12, no. 11, Nov. 2022, Art. no. 1626.

N. Bentrad and R. Gaceb-Terrak, "Evaluation of the level of biomolecules isolated from date palm seeds (Phoenix dactylifera L) and in vitro Antioxidant property," BioMedicine, vol. 10, no. 2, Jun. 2020.

D. X. Cuong et al., "Tannins: Extraction from Plants," in Tannins - Structural Properties, Biological Properties and Current Knowledge, IntechOpen, 2020.

J. D. M. F. Domingos et al., "Effect of the association of coagulation/flocculation, hydrodynamic cavitation, ozonation and activated carbon in landfill leachate treatment system," Scientific Reports, vol. 13, no. 1, Jun. 2023.

K. Grenda, J. Arnold, J. A. F. Gamelas, and M. G. Rasteiro, "Up-scaling of tannin-based coagulants for wastewater treatment: performance in a water treatment plant," Environmental Science and Pollution Research, vol. 27, no. 2, pp. 1202–1213, Jan. 2020.

K.-C. Huang, Z. Zhao, G. E. Hoag, A. Dahmani, and P. A. Block, "Degradation of volatile organic compounds with thermally activated persulfate oxidation," Chemosphere, vol. 61, no. 4, pp. 551–560, Oct. 2005.

A. Jamrah, T. M. AL-Zghoul, and Z. Al-Qodah, "An Extensive Analysis of Combined Processes for Landfill Leachate Treatment," Water, vol. 16, no. 12, Jun. 2024, Art. no. 1640.

J. Redfern, M. Kinninmonth, D. Burdass, and J. Verran, "Using Soxhlet Ethanol Extraction to Produce and Test Plant Material (Essential Oils) for Their Antimicrobial Properties," Journal of Microbiology & Biology Education, vol. 15, no. 1, pp. 45–46, May 2014.

F. Ruiz-Aquino, R. Feria-Reyes, J. G. Rutiaga-Quiñones, L. H. Robledo-Taboada, and R. Gabriel-Parra, "Characterization of tannin extracts derived from the bark of four tree species by HPLC and FTIR," Forest Science and Technology, vol. 19, no. 1, pp. 38–46, Jan. 2023.

L. C. Sander, "Soxhlet Extractions," Journal of Research of the National Institute of Standards and Technology, vol. 122, Jan. 2017.

L. Shi, W. Zhao, Z. Yang, V. Subbiah, and H. A. R. Suleria, "Extraction and characterization of phenolic compounds and their potential antioxidant activities," Environmental Science and Pollution Research, vol. 29, no. 54, pp. 81112–81129, Nov. 2022.

A. Smeriglio, D. Barreca, E. Bellocco, and D. Trombetta, "Proanthocyanidins and hydrolysable tannins: occurrence, dietary intake and pharmacological effects," British Journal of Pharmacology, vol. 174, no. 11, pp. 1244–1262, Jun. 2017.

A. Tsitonaki, B. Petri, M. Crimi, H. Mosbæk, R. L. Siegrist, and P. L. Bjerg, "In Situ Chemical Oxidation of Contaminated Soil and Groundwater Using Persulfate: A Review," Critical Reviews in Environmental Science and Technology, vol. 40, no. 1, pp. 55–91, Jan. 2010.

N. S. AL-Reyami, F. Shaik, and N. R. Lakkimsetty, "Environmental impact on usage of treated effluents from ISTP for irrigation," Journal of Water Process Engineering, vol. 36, Aug. 2020, Art. no. 101363.

S. R. S. Alalyani, N. R. Lakkimsetty, F. Shaik, and M. J. Varghese, "Modeling and optimization of bioethanol production yield from corn starch using response surface methodology," Environment, Development and Sustainability, Feb. 2023.

M. K. Karnena and V. Saritha, "Water Treatment by Green Coagulants—Nature at Rescue," in Advanced Sciences and Technologies for Security Applications, Cham: Springer International Publishing, 2021, pp. 215–242.

H. Khattabi, L. Aleya, and J. Mania, "Changes in the quality of landfill leachates from recent and aged municipal solid waste," Waste Management & Research: The Journal for a Sustainable Circular Economy, vol. 20, no. 4, pp. 357–364, Aug. 2002.

S. Kow, M. R. Fahmi, C. Z. A. Abidin, and O. Soon‐An, "Advanced Oxidation Processes: Process Mechanisms, Affecting Parameters and Landfill Leachate Treatment," Water Environment Research, vol. 88, no. 11, pp. 2047–2058, Nov. 2016.

D. Ouahida, O. M. Ridha, and L. S. Eddine, "Influence of Extraction Method on Phytochemical Composition and Antioxidant Activity from Leaves Extract of Algerian Phoenix dactylifera L.," International Journal of Current Pharmaceutical Review and Research, vol. 7, no. 2, pp. 84–89, Jan. 2016.

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[1]
S. Al Rashdi, N. R. Lakkimsetty, E. A. Al Hinai, and H. A. Al Zaabi, “Eco-Friendly Optimization of Landfill Leachate Treatment via Agricultural Waste-Derived Coagulants and Advanced Oxidation”, Eng. Technol. Appl. Sci. Res., vol. 15, no. 5, pp. 27507–27512, Oct. 2025.

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