molecules-logo

Journal Browser

Journal Browser

Biochar-Based Composites for Environmental Remediation

A special issue of Molecules (ISSN 1420-3049). This special issue belongs to the section "Applied Chemistry".

Deadline for manuscript submissions: closed (31 March 2023) | Viewed by 2537

Special Issue Editor


E-Mail Website
Guest Editor
Department of Electronic Engineering, Hellenic Mediterranean University, Chania, 73100 Crete, Greece
Interests: biochar; hydrochar; carbon-based nanocomposite materials; hydrothermal carbonization; biomass utilization for the production of added-value materials
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Biochar is a solid, carbon-rich material resulting from the pyrolysis of biomass under oxygen-free or oxygen-limited conditions and at temperatures between 300 and 800 °C. The type of biomass and the temperature and duration of pyrolysis are the main factors that determine biochar properties such as fixed carbon, volatile matter, mineral phases, surface area, porosity and pore size distribution. Due to its highly variable and customizable surface chemistry, biochar offers great potential in a variety of engineering applications. To modify its functionality and improve its performance in specific applications, biochar has also been used in composite materials, combined with inorganic substances (e.g., noble metals, metal oxides), enzymes and microbial cells. Biochar-based composites provide a novel approach to address challenging environmental issues such as wastewater treatment and soil remediation. This Special Issue aims to highlight the recent research in biochar-based composite materials used in wastewater treatment and/or soil remediation. Contributions to this Special Issue, in the form of original research or review articles, may cover all aspects of production, characterization and laboratory- or field-scale applications of biochar-based composites in wastewater treatment, soil remediation and atmospheric pollution control; studies with multidisciplinary input that offer new methodologies or insights, studies that include environmental toxicology assessments of biochar-based composites and studies that provide in-depth, statistical analyses and/or comparisons of existing data are particularly welcome.

Dr. Dimitrios Kalderis
Guest Editor

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. Molecules is an international peer-reviewed open access semimonthly 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 2700 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

  • Biochar
  • Magnetic biochar
  • composite materials
  • catalysts
  • wastewater treatment
  • soil remediation
  • atmospheric pollution control
  • heavy metals
  • industrial wastewater
  • municipal wastewater
  • metal oxides
  • adsorption
  • pyrolysis

Published Papers (1 paper)

Order results
Result details
Select all
Export citation of selected articles as:

Research

13 pages, 3041 KiB  
Article
Removal of 241Am from Aqueous Solutions by Adsorption on Sponge Gourd Biochar
by Maria Philippou, Ioannis Pashalidis and Dimitrios Kalderis
Molecules 2023, 28(6), 2552; https://0-doi-org.brum.beds.ac.uk/10.3390/molecules28062552 - 10 Mar 2023
Cited by 1 | Viewed by 1250
Abstract
Luffa cylindrica biomass was converted to biochar and the removal of 241Am by pristine and oxidized biochar fibers was investigated in laboratory and environmental water samples. This species has the added advantage of a unique microsponge structure that is beneficial for the [...] Read more.
Luffa cylindrica biomass was converted to biochar and the removal of 241Am by pristine and oxidized biochar fibers was investigated in laboratory and environmental water samples. This species has the added advantage of a unique microsponge structure that is beneficial for the production of porous adsorbents. The main purpose of this study was to valorize this biomass to produce an efficient adsorbent and investigate its performance in radionuclide-contaminated waters. Following the preparation of Am3+ solutions at a concentration of 10−12 mol/L, the adsorption efficiency (Kd) was determined as a function of pH, adsorbent mass, ionic strength, temperature, and type of aqueous solution by batch experiments. At the optimum adsorbent dose of 0.1 g and pH value of 4, a log10Kd value of 4.2 was achieved by the oxidized biochar sample. The effect of temperature and ionic strength indicated that adsorption is an endothermic and entropy-driven process (ΔH° = −512 kJ mol−1 and ΔS° = −1.2 J K−1 mol−1) leading to the formation of inner-sphere complexes. The adsorption kinetics were relatively slow (24 h equilibrium time) due to the slow diffusion of the radionuclide to the biochar surface and fitted well to the pseudo-first-order kinetic model. Oxidized biochar performed better compared to the unmodified sample and overall appears to be an efficient adsorbent for the treatment of 241Am-contaminated waters, even at ultra-trace concentrations. Full article
(This article belongs to the Special Issue Biochar-Based Composites for Environmental Remediation)
Show Figures

Figure 1

Back to TopTop