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Clean Technol.
Special Issues
Pollutant Removal from Aqueous Solutions by Adsorptive Biomaterials
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Pollutant Removal from Aqueous Solutions by Adsorptive Biomaterials

A special issue of Clean Technologies (ISSN 2571-8797).

Deadline for manuscript submissions: 30 September 2025 | Viewed by 1920

Special Issue Editors

Dr. Andreea Bondarev

E-Mail Website
Guest Editor
Chemistry Department, Faculty of Petroleum Refining and Petrochemistry, Petroleum—Gas University of Ploiesti, 100680 Ploiesti, Romania
Interests: green chemistry; wastewater treatment; optimization of sorbents for water decontamination; carbon materials; biosorbents; organic dyes
Dr. Sonia Mihai

E-Mail Website
Guest Editor
Chemistry Department, Faculty of Petroleum Refining and Petrochemistry, Petroleum—Gas University of Ploiesti, 100680 Ploiesti, Romania
Interests: nanomaterials; photocatalysis; organic dyes; water decontamination; carbon materials

Special Issue Information

Dear Colleagues,

We invite you to contribute an original research paper, review article, or hot topic to our Special Issue of Clean Technologies entitled “Pollutant Removal from Aqueous Solutions by Adsorptive Biomaterials”, for peer-review and possible publication. Worldwide, large volumes of household and industrial wastewater are produced each year, and inadequate wastewater treatment is currently regarded as one of the main factors causing the pollution of water resources.

Compared to other conventional methods of water depollution, adsorption has emerged as significant technology for removing harmful substances.

A variety of novel non-conventional adsorbents, either synthetic or natural, have been developed in recent years to remove environmental pollutants from water and wastewater via adsorption. Biomaterials aim to align with the concepts of the circular economy and green chemistry while being more ecologically benign, economically feasible, easy to use and regenerate. The list of bio-adsorbents is particularly vast, including, for example, plant biomass, cellulose-based materials, lignocellulosic agricultural waste, forestry and pulp industry waste, biochar composites, novel-structured carbon-based materials, chitosan-based nanocomposites, modified zeolites, and modified clays.

The objective of this Special Issue on “Pollutant Removal from Aqueous Solutions by Adsorptive Biomaterials” is to review the state of the art and disseminate the latest research results obtained in the domain of non-conventional adsorbents used to remove water pollutants.

We invite colleagues to contribute original research papers and critical reviews addressing recent progresses on all aspects regarding innovative bio-adsorbents for water decontamination.

Dr. Andreea Bondarev
Dr. Sonia Mihai
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. Clean Technologies is an international peer-reviewed open access quarterly 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 1600 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

  • adsorptive biomaterials
  • adsorption mechanisms
  • organic matter
  • heavy metals
  • persistent organic pollutants
  • characterization methods

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

Published Papers (2 papers)

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Research

23 pages, 6054 KiB  
Article
Impact of Mining on River Water Quality in Roșia Montană Area, Romania, and the Use of Zeolites for Acid Mine Drainage Remediation
by Mirel Glevitzky, Roxana Bostan, Simona Varvara, Mihai-Teopent Corcheş, Gabriela-Alina Dumitrel and Maria Popa
Clean Technol. 2025, 7(2), 41; https://doi.org/10.3390/cleantechnol7020041 - 21 May 2025
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Abstract
Mining activities have a significant impact on the quality of river water in the Roșia Montană area. This region, known for its gold and other precious metal mining, serves as an example of the interaction between anthropogenic activities and the natural environment. Water [...] Read more.
Mining activities have a significant impact on the quality of river water in the Roșia Montană area. This region, known for its gold and other precious metal mining, serves as an example of the interaction between anthropogenic activities and the natural environment. Water from mine drainage is metal-rich and contaminates the environment, inhibiting the growth and reproduction of aquatic plants and animals, while also having corrosive effects on infrastructure. As part of the study, parameters such as pH, dissolved oxygen, biochemical oxygen demand, chemical oxygen demand, sulfates, and heavy metals were monitored for the rivers in the area (Roșia Montană, Săliște, Corna, Abrud, and Arieș). Roșia Montană river shows a decrease in pH to highly acidic values (2.69–3.95), especially in the downstream sections. Sulfate concentrations exceed 3600 mg/L, and heavy metal concentrations (Fe, Zn, As, Mn) increase significantly, indicating severe pollution, primarily originating from the Gura Mine gallery. These frequently exceed the thresholds corresponding to water quality classes I and II, and in some cases even surpass the limits of class V (the most polluted). The presence of As (27.60 µg/L) in Roșia Montană River indicates a significant ecotoxicological risk. In an attempt to treat the acid mine drainage from Roșia Montană, a natural zeolite was used at different doses. The results obtained show good efficiency of zeolite in removing the metal ions (Fe, Zn, and Mn). The results provide valuable information on the quality of river waters in the mining area of Roșia Montană and suggest that zeolite can be used effectively to decontaminate mine waters. Full article
(This article belongs to the Special Issue Pollutant Removal from Aqueous Solutions by Adsorptive Biomaterials)
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24 pages, 9291 KiB  
Article
The Efficiency of Chlorella vulgaris in Heavy Metal Removal: A Comparative Study of Mono- and Multi-Component Metal Systems
by Eleni Kyratzopoulou, Nikoletta Kyzaki, Lamprini Malletzidou, Evangelos Nerantzis and Nikolaos A. Kazakis
Clean Technol. 2025, 7(2), 35; https://doi.org/10.3390/cleantechnol7020035 - 18 Apr 2025
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Abstract
The occurrence of heavy metals in aquatic ecosystems is a serious environmental hazard, and their effective removal is imperative. In this regard, the feasibility of living microalga Chlorella vulgaris (C. vulgaris) to remove heavy metals (Ni, Pb, Zn, Cd, and Cu) [...] Read more.
The occurrence of heavy metals in aquatic ecosystems is a serious environmental hazard, and their effective removal is imperative. In this regard, the feasibility of living microalga Chlorella vulgaris (C. vulgaris) to remove heavy metals (Ni, Pb, Zn, Cd, and Cu) is investigated by using 1, 5, and 10 ppm concentrations of single- and multiple-metal-treated (MT) cultures. Experiments were performed in controlled laboratory conditions, and metal removal analysis was performed through atomic absorption spectroscopy (AAS). The cultures were also examined by means of optical microscopy, UV-Vis spectrophotometry, and Fourier transform infrared (FTIR) spectroscopy to follow the cultures’ pigment content, cell population, and functional group changes during cultivation. The removal efficiency results of both single and multiple MT cultures were evaluated using the Langmuir isotherm model. The results indicate that C. vulgaris presents potential for heavy metal bioremediation, even towards multi-MT conditions, despite the influence of a competitive uptake in multi-MT cultures. In mono-MT cultures, the removal efficiency of C. vulgaris presents values of 65–99% on Day 3 and 72–99% on Day 7 of cultivation, while the results for the multi-MT cultures are 49–99% and 62–99% for Days 3 and 7 of cultivation, respectively. The research illustrates the potential for C. vulgaris as a promising biosorbent for heavy metal remediation along with its post-treatment use in applications supporting the green circular economy. Full article
(This article belongs to the Special Issue Pollutant Removal from Aqueous Solutions by Adsorptive Biomaterials)
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