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Separations, Volume 12, Issue 9

September 2025 - 33 articles

Cover Story: Heliotropium procumbens, a Boraginaceae species native to Panama, remains understudied for nitrogen-containing metabolites, especially pyrrolizidine alkaloids (PAs). This study presents a detailed phytochemical analysis of its aerial parts using HPLC-DAD-IT-MS, UHPLC–HRMS, and GC-MS, identifying twelve PAs and their N-oxides, along with two phenolamides including N1, N10-diferuloylspermidine and the unique heliotropamide. The PAs included unsaturated necines, mainly retronecine and heliotridine monoesters, plus saturated platynecine-type and triol necines with N-oxides. Helifoline-N-oxide was isolated and structurally characterized by NMR for the first time. Comparison within the Heliotropium genus shows high PA diversity in H. procumbens, reflecting both its biosynthetic capacity and extensive study-enriching observed chemodiversity. View this paper
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Articles (33)

  • Review
  • Open Access
1,627 Views
24 Pages

22 September 2025

Wastewater analysis plays a central role in monitoring patterns of drug use within specific populations. It provides objective and real-time estimates of consumption, with minimal ethical concerns. In the current European context, drugs of abuse cont...

  • Article
  • Open Access
847 Views
15 Pages

21 September 2025

Tetrahydrofuran (THF) and methanol (MeOH) are widely used as organic solvents in chemical, pharmaceutical, and other industrial fields. The wastewater from producing 1,4-butanediol contains THF, MeOH, and water ternary azeotropic mixture. In this stu...

  • Article
  • Open Access
712 Views
26 Pages

Optimization of Organic Micropollutant Adsorption onto Granular Activated Carbon Using Response Surface Methodology

  • Nora Samghouli,
  • Najoua Labjar,
  • Meryem Bensemlali,
  • Hamid Nasrellah and
  • Souad El Hajjaji

21 September 2025

Water pollution from pharmaceutical and textile industries urgently requires effective treatment solutions due to environmental and health risks. Effective treatment methods are desperately needed for water pollution from the textile and pharmaceutic...

  • Article
  • Open Access
523 Views
26 Pages

Carp Scales Modified with Cerium Oxide Nanoparticles as a New Bio-Adsorbent for Arsenic and Chromium Separation from Water

  • Zoran Bajić,
  • Uroš Z. Veličković,
  • Veljko Djokić,
  • Mihael Bučko,
  • Jovica Bogdanov,
  • Krstimir Pantić and
  • Aleksandar D. Marinković

19 September 2025

Different treatments of fish scales from carps (Cyprinus carpio) (FS)—mechanical milling, modified with cerium dioxide (CeO2) nanoparticles and controlled carbonization of FS and modification with CeO2—were applied to obtain FS, FS-CeO2 a...

  • Article
  • Open Access
1,032 Views
20 Pages

Iron Recovery from Turkish and Romanian Bauxite Residues Through Magnetic Separation: Effect of Hydrothermal Processing and Separation Conditions

  • Panagiotis Angelopoulos,
  • Paschalis Oustadakis,
  • Nikolaos Kountouris,
  • Michail Samouhos,
  • Georgios Anastassakis and
  • Maria Taxiarchou

17 September 2025

This study investigates the potential of two low-iron-grade bauxite residue (BR) samples, containing up to 27.4 wt.% Fe and originating from alumina plants in Romania and Turkey, for the recovery of iron concentrate via wet magnetic separation. The m...

  • Article
  • Open Access
578 Views
12 Pages

Investigation on Li Recovery from Greek Coal Fly Ash Under a Circular Economy Framework: An Experimental Study

  • Despina Pentari,
  • Pagona Makri,
  • Panagiotis Xanthopoulos and
  • Despina Vamvuka

15 September 2025

Lithium is classified as a critical element and is widely used in a variety of high-tech applications. Within the framework of a circular economy, demand is rising for technologies capable of recovering high-tech metals from waste materials and indus...

  • Article
  • Open Access
1,193 Views
19 Pages

A Focus on the Emission of Volatile Organic Compounds (VOCs) from Raw Materials Potentially Used in Human Odor Sampling

  • Elsa Boudard,
  • Nabil Moumane,
  • José Dugay,
  • Jérôme Vial,
  • Michel Sablier and
  • Didier Thiébaut

11 September 2025

The present study provided an exhaustive examination of VOC emissions originating from 13 different raw materials susceptible to being used in the sampling of the human volatilome and encompassing both polymeric and non-polymeric compositions. To ach...

  • Article
  • Open Access
473 Views
19 Pages

Semi-Pilot Scale Extraction of Pinocembrin and Galangin from Populus alba L. × berolinensis K. Koch via Enzymatic Pretreatment and Ultrasonication

  • Ru Zhao,
  • Xiaoli Li,
  • Yazhou Bao,
  • Wenjun Xu,
  • Chen Xu,
  • Rongrong Wang,
  • Tianlan Xia,
  • Tingli Liu and
  • Ailing Ben

11 September 2025

In this investigation, pinocembrin and galangin were efficiently extracted from the male inflorescence of Populus alba L. × berolinensis K. Koch through an enzymatic pretreatment–ultrasonic-assisted strategy (EP-UAS), and the feasibility...

  • Article
  • Open Access
874 Views
21 Pages

Synthesis and CO2 Capture Properties of Co- and Nd-Modified ZIF-8 Materials Loaded onto Electrospun Polyacrylonitrile Fibers

  • Daniela Vargas-Romero,
  • Oscar Ovalle-Encinia,
  • Elizabeth Rojas-García,
  • Ana Marisela Maubert-Franco,
  • Mónica Corea,
  • Lucía Téllez-Jurado and
  • José Ortiz-Landeros

10 September 2025

Zeolitic imidazolate framework (ZIF)-8 materials exhibiting zinc metal centers partially replaced by cobalt or neodymium were successfully synthesized via a convenient coprecipitation method. The resulting materials were structurally and microstructu...

  • Article
  • Open Access
997 Views
22 Pages

Biosorption of Manganese Using Moringa oleifera Seed Pods: A Sustainable Approach to Water Treatment

  • Laura Adriane de Moraes Pinto,
  • Fernanda de Oliveira Tavares,
  • Rosangela Bergamasco,
  • Marcelo Fernandes Vieira and
  • Angélica Marquetotti Salcedo Vieira

9 September 2025

Manganese (Mn) has emerged as a contaminant of concern due to its occurrence at concentrations exceeding regulatory limits in various environmental matrices, driven by both anthropogenic activities and natural geochemical processes. Although Mn is an...

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Separations - ISSN 2297-8739