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Gels
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Advanced Research of Aquatic Gels and Their Applications
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Advanced Research of Aquatic Gels and Their Applications

A special issue of Gels (ISSN 2310-2861). This special issue belongs to the section "Gel Applications".

Deadline for manuscript submissions: closed (31 October 2022) | Viewed by 5591

Special Issue Editor

Dr. Ruei-Feng Shiu

E-Mail Website
Guest Editor
Institute of Marine Environment and Ecology, National Taiwan Ocean University, No.2 Pei-Ning Road, Keelung 20224, Taiwan
Interests: aquatic gels; microplastics; environmental sciences; marine pollution; extracellular polymeric substances
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Gels is ubiquitous in aquatic systems and is believed to determine the formation behavior of marine snow and biofilms and the mobility of pollutants. The broad impacts of these gel materials, including various colloids, biopolymers, microbial extracellular polymeric substances, wastewater treatments, and air–water interfaces, are vast. Engineered functionalized gels are also promising new classes of materials for the treatment of polluted water to enhance pollutant removal. This Special Issue aims to inform the reader of advanced research of aquatic gels and their applications by inviting colleagues researching marine biogeochemistry, fresh water ecology, wastewater/sludge treatment, pollutant fate, and atmospheric science to report on advances in the study of:

  1. Sources, characteristics, and release mechanisms of gel-like materials in aquatic systems including oceanic/fresh water and wastewater;
  2. Aggregation and sedimentation of gel-like materials and their environmental implications;
  3. Aquatic gel interactions with pollutants, including changing fate, partitioning, toxicity, mobility, etc.;
  4. Novel measurement and observation technologies for the properties of aquatic gels;
  5. Effect of gel-like substances on surface corrosion and biofouling/biofilm formation;
  6. Studies on the role of gels in air–water interfacial physics and chemistry;
  7. Application of engineered and natural gels for pollutant removal and remediation.

Research articles covering the areas above or other relevant topics are welcomed for possible inclusion in this Special Issue of Gels.

Dr. Ruei-Feng Shiu
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. Gels 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

  • aquatic gels
  • aggregation behaviour
  • pollutant complexation and removal
  • wastewater/sludge treatment
  • extracellular polymeric substances
  • surface corrosion
  • biofouling

Published Papers (3 papers)

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Research

16 pages, 1084 KiB  
Article
Effects of Salinity on Abiotic Aggregation of Organic Matter and Subsequent Microbial Responses
by Tzong-Yueh Chen and Annelie Skoog
Gels 2022, 8(12), 836; https://doi.org/10.3390/gels8120836 - 18 Dec 2022
Viewed by 964
Abstract
Studies of marine aggregation have focused on determining formation rates of larger particles from small particles. However, it has been shown that particles can form from the dissolved phase, which includes colloidal material. The purpose of this study was to investigate the effect [...] Read more.
Studies of marine aggregation have focused on determining formation rates of larger particles from small particles. However, it has been shown that particles can form from the dissolved phase, which includes colloidal material. The purpose of this study was to investigate the effect of aggregation on the chemical composition of both the dissolved and particulate phases in two salinity regimes: (1) the coast of Avery Point, Connecticut, USA (AP; salinity of 30.1 psu); (2) the estuary of Thames River, Connecticut, USA (TR; salinity of 5.0 psu). The samples were incubated on a roller table for two days in the dark at a speed of 8 rpm. The mixed collision mechanism of shear and differential sedimentation provided by the roller table enhanced the gross aggregation of particulate organic carbon (POC; 0.75 µM d−1 and 1.04 µM d−1 in AP and TR, respectively). Subsequent microbial degradation led to a negative net aggregation of POC (−5.20 µM d−1 and −1.19 µM d−1 in AP and TR, respectively). Although bacterial abundance remained in a narrow range in this study, the aggregation of organic matter (OM) enhanced planktonic community respiration (CR; CR increased 5.1 mg-C m−3 d−1 and 205.4 mg-C m−3 d−1 in AP and TR, respectively). The collision also led to a gross aggregation of uncharacterized particulate organic matter (POM) transferred from uncharacterized dissolved organic matter (DOM; 0.62 µM-C d−1 and 0.56 µM-C d−1 in AP and TR, respectively). The aggregated, uncharacterized POM could be biologically refractory. The C- and N-yields and enrichment factor (EF) analysis indicated that the organic substrate dynamics in this study were complicated. Full article
(This article belongs to the Special Issue Advanced Research of Aquatic Gels and Their Applications)
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15 pages, 2620 KiB  
Article
Quantum Chemical Calculation for Intermolecular Interactions of Alginate Dimer-Water Molecules
by Daru Seto Bagus Anugrah, Laura Virdy Darmalim, Muhammad Rifky Irwanto Polanen, Permono Adi Putro, Nurwarrohman Andre Sasongko, Parsaoran Siahaan and Zeno Rizqi Ramadhan
Gels 2022, 8(11), 703; https://doi.org/10.3390/gels8110703 - 31 Oct 2022
Cited by 5 | Viewed by 1660
Abstract
The abundance of applications of alginates in aqueous surroundings created by their interactions with water is a fascinating area of research. In this paper, computational analysis was used to evaluate the conformation, hydrogen bond network, and stabilities for putative intermolecular interactions between alginate [...] Read more.
The abundance of applications of alginates in aqueous surroundings created by their interactions with water is a fascinating area of research. In this paper, computational analysis was used to evaluate the conformation, hydrogen bond network, and stabilities for putative intermolecular interactions between alginate dimers and water molecules. Two structural forms of alginate (alginic acid, alg, and sodium alginate, SA) were evaluated for their interactions with water molecules. The density functional theory (DFT-D3) method at the B3LYP functional and the basis set 6-31++G** was chosen for calculating the data. Hydrogen bonds were formed in the Alg-(H2O)n complexes, while the SA-(H2O)n complexes showed an increase in Van der Walls interactions and hydrogen bonds. Moreover, in the SA-(H2O)n complexes, metal-nonmetal bonds existed between the sodium atom in SA and the oxygen atom in water (Na…O). All computational data in this study demonstrated that alginate dimers and water molecules had moderate to high levels of interaction, giving more stability to their complex structure. Full article
(This article belongs to the Special Issue Advanced Research of Aquatic Gels and Their Applications)
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25 pages, 5149 KiB  
Article
Do Red Seaweed Nanoparticles Enhance Bioremediation Capacity of Toxic Dyes from Aqueous Solution?
by Abdallah Tageldein Mansour, Ahmed E. Alprol, Mohamed Ashour, Khaled M. A. Ramadan, Adnan H. M. Alhajji and Khamael M. Abualnaja
Gels 2022, 8(5), 310; https://doi.org/10.3390/gels8050310 - 17 May 2022
Cited by 14 | Viewed by 2313
Abstract
Based on their functional groups, the use of various seaweed forms in phytoremediation has recently gained significant eco-friendly importance. The objective of this study was to determine whether a novel, sustainable, and ecologically acceptable adsorbent could be employed to remove toxic textile dye [...] Read more.
Based on their functional groups, the use of various seaweed forms in phytoremediation has recently gained significant eco-friendly importance. The objective of this study was to determine whether a novel, sustainable, and ecologically acceptable adsorbent could be employed to remove toxic textile dye (Ismate Violet 2R (IV2R)) from an aqueous solution. The low-cost adsorbent was prepared from the nanoparticles form of the native red seaweed species, Pterocladia capillacea. Before and after the adsorption procedure, comprehensive characterization experiments on the bio-adsorbent were carried out, including BET, SEM, FTIR, UV, and dynamic light scattering (DLS) examination. The adsorption performance of the prepared nano-Pterocladia capillacea was optimized by adjusting operating parameters such as the initial dye concentration of 60 mg L−1, pH of 2, and contact time of 15 min, all of which were obtained by batch experiments in the lab. At the optimum conditions, the prepared adsorbent had maximum removal effectiveness of 87.2%. Most typical kinetics and isotherm models were used to test the experimental results. The equilibrium data fit well with the Langmuir isotherm model, with comparatively higher R2 values and fewer standard errors, while the pseudo-second-order kinetic model fits better with a decent correlation coefficient. Thermodynamic parameters revealed that the sorption process on nano-alga was exothermic and spontaneous. Full article
(This article belongs to the Special Issue Advanced Research of Aquatic Gels and Their Applications)
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