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Separations, Volume 12, Issue 4

April 2025 - 30 articles

Cover Story: This study addresses nitrate contamination in soil by the application of environmentally friendly adsorbents from bamboo powder and oyster shells. The porous structure of bamboo powder was chemically modified with magnesium chloride to enhance its binding to nitrate ions. Nano-sized oyster shells, composed of calcium carbonate, can also increase adsorption potential. Adsorption capacity was assessed using the isotherm models of Langmuir, Freundlich, and Dubin–Radushkevich. The estimations of the adsorption capacity of these Mg-loaded bamboo (399 mg/L) and nano-sized oyster shells (354 mg/L) demonstrate their efficiency in nitrate removal, thus promoting the recycling of waste for the protection of the environment. View this paper
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Articles (30)

  • Article
  • Open Access
659 Views
12 Pages

Effects of Lubricants and the Additives on the Foaming of Desulfurization Solvent

  • Jiandong Zhang,
  • Changchun Li,
  • Yang Yang,
  • Xiaolong Xu and
  • Hui Sun

Understanding the effects of industrial lubricating oil and additives on desulfurization solution foaming is very important to both engineers and academic researchers. In this study, the influences of lubricating oil and its additive components on th...

  • Article
  • Open Access
3 Citations
1,063 Views
16 Pages

In recent years, the rapid development of industry has led to the discharge of large quantities of pollutants, including harmful dyes, into water sources, thereby posing potential threats to human health and the environment. FeOCl and biochar have th...

  • Article
  • Open Access
5 Citations
1,619 Views
28 Pages

Synthesis and Application of Poly(N-isopropylacrylamide-co-methacrylic Acid) Hydrogels as Sorbent Materials for Wastewater Treatment

  • Aleksandar Zdravković,
  • Vesna Nikolić,
  • Snežana Ilić-Stojanović,
  • Sanja Stojanović,
  • Ana Dinić,
  • Maja Urošević,
  • Ivana Gajić and
  • Ljubiša Nikolić

N-isopropylacrylamide and methacrylic acid were copolymerized by a free radical polymerized mechanism. The obtained hydrogel poly(N-isopropylacrylamide-co-methacrylic acid) hydrogels, poly(NIPAM-co-MAA), were utilized as sorbent material for removal...

  • Article
  • Open Access
1 Citations
1,277 Views
18 Pages

Membrane technology is widely used in various aspects of wastewater treatment; however, single membrane technology has a series of disadvantages, such as high selectivity, poor recycling performance, and susceptibility to contamination. In this study...

  • Article
  • Open Access
936 Views
13 Pages

Preparation of Lithium Carbonate from Manganese-Containing Desorption Solution from Salt Lakes via an Organophosphoric Acid Extraction System

  • Shaolei Xie,
  • Yuze Zhang,
  • Xiaowu Peng,
  • Yong Niu,
  • Hailong Lu,
  • Fugen Song,
  • Dong Shi and
  • Lijuan Li

Adsorption is a popular method for the recovery of low-grade lithium. It is a low-cost and highly efficient way to treat solutions with low lithium concentrations. The impurity content determines the industrial application. This study investigated a...

  • Review
  • Open Access
2 Citations
2,323 Views
26 Pages

This review systematically summarizes the novel preparation methods of cyclodextrin-based chromatographic stationary phases and their applications for chiral recognition in separation techniques such as capillary gas chromatography and high-performan...

  • Article
  • Open Access
1 Citations
809 Views
12 Pages

Alzheimer’s disease (AD) is a progressive neurodegenerative condition and one of the most prevalent types of dementia in older adults. Currently, the primary drugs used to treat AD are acetylcholinesterase (AChE) inhibitors. The development of...

  • Review
  • Open Access
2 Citations
2,306 Views
23 Pages

New Trends in the Methodologies of Determination of Benzodiazepine Residues in Biological Samples

  • Israel S. Ibarra,
  • Isaí Vázquez-Garrido,
  • Gabriela Islas and
  • Juan F. Flores-Aguilar

The benzodiazepines are essential drugs used in medicine for anxiolytic, sedative, and hypnotic effects. According to the World Health Organization, the benzodiazepines are the most prescribed hypnotic drugs in the last decade (2010 at time), and the...

  • Article
  • Open Access
2 Citations
822 Views
11 Pages

Polyethyleneimine-based porous composites have been prepared by ring-opening polymerization of 2,2-bishydroxymethylbutanol-tris[3-(1-aziridinyl)propionate] (3AZ), a tri-aziridine compound, in water, in the presence of cyclodextrins (CDs), i.e., &alph...

  • Article
  • Open Access
824 Views
14 Pages

A five-bed, seven-step vacuum pressure swing adsorption (VPSA) system was computationally modeled to assess carbon monoxide (CO) separation from CO/N2 mixed gas (30/70, v/v). Two adsorbents with distinct isotherm characteristics (steep-slope CuCl/NaY...

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Separations - ISSN 2297-8739