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Toxics
Special Issues
Environmental Study of Waste Management: Life Cycle Assessment
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Environmental Study of Waste Management: Life Cycle Assessment

A special issue of Toxics (ISSN 2305-6304). This special issue belongs to the section "Toxicity Reduction and Environmental Remediation".

Deadline for manuscript submissions: 5 February 2026 | Viewed by 576

Special Issue Editors

Prof. Dr. Qing Huang

E-Mail Website
Guest Editor
School of Environment Science and Engineering, Hainan University, Haikou 570228, China
Interests: safe waste disposal and high-value utilization; ecological recycling agriculture; ecological reconstruction of contaminated sites and safety risk assessment
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Sardar Khan

E-Mail Website
Guest Editor
Department of Environmental Sciences, University of Peshawar, Peshawar, Pakistan
Interests: environmental and food chain contamination and health risk; remediation of contaminated soil and water; biochar application and its environmental benefits; pesticide bioaccessibility and bioaccumula

Special Issue Information

Dear Colleagues,

This Special Issue, " Environmental Study of Waste Management: Life Cycle Assessment", aims to explore the intersection of waste management practices and life cycle assessment (LCA) methodologies. This combination offers a holistic approach to understanding the environmental impacts of waste management processes. Please note that economic and social aspects are separate topics that are excluded from the scope of this Special Issue.

Through the exploration of life cycle assessment tools, we seek to provide a comprehensive overview of the sustainability and efficiency of waste management strategies across multiple waste streams, including municipal solid waste, animal manure, and wastewater sludge. This includes the following:

  • Waste Management Strategies: Examining various waste treatment methods, such as recycling, energy recovery, and landfilling, and their environmental and health implications.
  • Environmental Risk Assessment: Assessing the potential risks to the environment and human health posed by emerging contaminants generated during waste management, such as microplastics.
  • Waste Treatment Technologies: Investigating physical, chemical, and biological treatment methods, as well as technological innovations in waste recycling and resource recovery.

Prof. Dr. Qing Huang
Prof. Dr. Sardar Khan
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Toxics is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • waste management
  • solid waste
  • animal manure
  • wastewater sludge
  • environmental risk

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Further information on MDPI's Special Issue policies can be found here.

Published Papers (1 paper)

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Research

18 pages, 2162 KiB  
Article
Simultaneous Decontamination for Ammonia Nitrogen and Phosphate Efficiently by Crystal Morphology MgO-Coated Functional Biochar Derived from Sludge and Sunflower Stalk
by Zhiwei Li, Jingxin Huang, Weizhen Zhang, Hao Yu and Yin Wang
Toxics 2025, 13(7), 577; https://doi.org/10.3390/toxics13070577 - 9 Jul 2025
Viewed by 395
Abstract
Eutrophication driven by nitrogen and phosphorus discharge remains a critical global environmental challenge. This study developed a sustainable strategy for synergistic nutrient removal and recovery by fabricating MgO-coated biochar (Mg-MBC600) through co-pyrolysis of municipal sludge and sunflower stalk (300–700 °C). Systematic investigations revealed [...] Read more.
Eutrophication driven by nitrogen and phosphorus discharge remains a critical global environmental challenge. This study developed a sustainable strategy for synergistic nutrient removal and recovery by fabricating MgO-coated biochar (Mg-MBC600) through co-pyrolysis of municipal sludge and sunflower stalk (300–700 °C). Systematic investigations revealed temperature-dependent adsorption performance, with optimal nutrient removal achieved at 600 °C pyrolysis. The Mg-MBC600 composite exhibited enhanced physicochemical properties, including a specific surface area of 156.08 m2/g and pore volume of 0.1829 cm3/g, attributable to magnesium-induced structural modifications. Advanced characterization confirmed the homogeneous dispersion of MgO nanoparticles (~50 nm) across carbon matrices, forming active sites for chemisorption via electron-sharing interactions. The maximum adsorption capacities of Mg-MBC600 for nitrogen and phosphorus reached 84.92 mg/L and 182.27 mg/L, respectively. Adsorption kinetics adhered to the pseudo-second-order model, indicating rate-limiting chemical bonding mechanisms. Equilibrium studies demonstrated hybrid monolayer–multilayer adsorption. Solution pH exerted dual-phase control: acidic conditions (pH 3–5) favored phosphate removal through Mg3(PO4)2 precipitation, while neutral–alkaline conditions (pH 7–8) promoted NH4+ adsorption via MgNH4PO4 crystallization. XPS analysis verified that MgO-mediated chemical precipitation and surface complexation dominated nutrient immobilization. This approach establishes a circular economy framework by converting waste biomass into multifunctional adsorbents, simultaneously addressing sludge management challenges and enabling eco-friendly wastewater remediation. Full article
(This article belongs to the Special Issue Environmental Study of Waste Management: Life Cycle Assessment)
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