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Separations, Volume 12, Issue 4

2025 April - 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
748 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
4 Citations
1,184 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
6 Citations
1,824 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
1,427 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
1,043 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
2,577 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
929 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
3 Citations
2,505 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
948 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
885 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...

  • Article
  • Open Access
3 Citations
1,329 Views
17 Pages

This study investigates soil volatilomics as an innovative approach to assessing the impact of land use on soil quality. This research addresses the critical need for sensitive diagnostic tools to distinguish subtle biochemical variations in soils in...

  • Article
  • Open Access
1 Citations
2,339 Views
16 Pages

Extraction and Characterization of TiO2 Pigments from Commercial Paints for Environmental Studies

  • Allan Philippe,
  • Sylvester Ndoli-Kessie,
  • Christian Fricke,
  • Jean-Michel Guigner,
  • Benjamin Heider and
  • Eliana Di Lodovico

TiO2 nanoparticles are found as pigments in coatings and paints and are, therefore, released into the environment through runoff. To assess their environmental impact, comprehensive fate and ecotoxicity studies necessitate particles closely resemblin...

  • Article
  • Open Access
2 Citations
1,017 Views
18 Pages

Rare earth elements (REEs) are important strategic resources, widely used in various technological fields, especially heavy rare earth elements (HREEs). China has extensive rare earth deposits, with diverse mineral types and a complete range of rare...

  • Review
  • Open Access
2 Citations
2,407 Views
27 Pages

Advances in Enrichment and Purification Technology of Ammonium Perrhenate

  • Hailong Jing,
  • Qidong Zhang,
  • Zhifang Hu,
  • Hongling Jiang,
  • Bowen Gao,
  • Tingan Zhang and
  • Yanxi Yin

Rhenium metal is extensively utilized in the aerospace industry for the manufacturing of various superalloys due to its unique properties, and plays an indispensable role in the field of high technology. Rhenium resources are primarily associated wit...

  • Review
  • Open Access
3 Citations
3,986 Views
26 Pages

Application of Lignin-Derived Carbon Materials in Adsorption and Separation

  • Xiaorui Dong,
  • Yunlei Zhang,
  • Shouyan Shao,
  • Hao Li and
  • Xingchen Yan

In the context of sustainable human development and the depletion of petroleum resources, lignin has received widespread attention as a carbon-rich, low-cost, and renewable resource. Owing to their distinctive physical and chemical properties, carbon...

  • Article
  • Open Access
924 Views
14 Pages

Fine particulate matter (PM) and sulfur trioxide (SO3) from coal-fired flue gas pose significant environmental and health risks. While low-low temperature electrostatic precipitators (LLT-ESPs) enhance PM and SO3 removal by cooling flue gas below the...

  • Article
  • Open Access
1 Citations
2,602 Views
14 Pages

The presence of abundant water vapor in industrial organic waste gases greatly reduces the selective adsorption of volatile organic pollutants (VOCs). The polarity of the adsorbent and VOC molecules plays an important role in the adsorption process,...

  • Article
  • Open Access
2,499 Views
15 Pages

The simultaneous determination of 166 pesticides using dispersive liquid–liquid micro extraction combined with gas chromatography–tandem mass spectrometry and ultra-high performance liquid chromatography–tandem mass spectrometry (DL...

  • Article
  • Open Access
1,166 Views
15 Pages

In this study, to identify an appropriate macroporous resin for the purification of the crude extract derived from Simiao Yong’an Decoction (SMYAD), five distinct resins were evaluated based on their adsorption and desorption performance. Throu...

  • Article
  • Open Access
1 Citations
2,260 Views
16 Pages

Titanium Meets Carbon: Enhanced Reusable Filters for Oil–Water Separation and Environmental Remediation

  • Amir-Hadi Boroumand,
  • Kayla Laguana,
  • Eric Dudley,
  • Pilar Cuadros-Arias,
  • Adrian Rubio,
  • Zachary Shin,
  • Jack Webster and
  • Mingheng Li

To mitigate the environmental effects of oil spills, a novel hydrophilic–oleophobic mixed-coated filter was developed for efficient oil–water separation and surface oil recovery. The coating consisted of titanium dioxide nanoparticles (Ti...

  • Review
  • Open Access
5 Citations
4,235 Views
23 Pages

Microplastics in the Environment: A Review Linking Pathways to Sustainable Separation Techniques

  • Lin Zeng,
  • Long Li,
  • Jueyan Xiao,
  • Penghui Zhou,
  • Xiaoxiang Han,
  • Bohao Shen and
  • Li Dai

Since the mid-20th century, the quantity of microplastics (MPs) has increased significantly, becoming a persistent environmental pollutant widely distributed in global water bodies, soils, and the atmosphere. While plastic materials have brought sign...

  • Article
  • Open Access
1,358 Views
20 Pages

Polygonatum sibiricum (P. sibiricum) is a significantly health-promoting plant unique in medicine and food. Currently, research on the bioactive components of P. sibiricum primarily focuses on polysaccharides. According to the Chinese Pharmacopoeia,...

  • Article
  • Open Access
1 Citations
1,120 Views
17 Pages

The bed expansion height serves as a macroscopic representation of the efficiency with which vibrational energy is transmitted within pulsed fluidized beds. Due to its complex nonlinear characteristics, further research is needed to explore the fluid...

  • Article
  • Open Access
2 Citations
2,123 Views
27 Pages

Determination of the Phytochemical Profile and Antioxidant Activity of Some Alcoholic Extracts of Levisticum officinale with Pharmaceutical and Cosmetic Applications

  • Alaa Sahlabgi,
  • Dumitru Lupuliasa,
  • Iuliana Stoicescu,
  • Lavinia Lia Vlaia,
  • Monica Licu,
  • Antoanela Popescu,
  • Alexandru Scafa-Udriște,
  • Răzvan Ene,
  • Lucian Hîncu and
  • Magdalena Mititelu
  • + 1 author

Levisticum officinale (lovage) is an aromatic and medicinal plant traditionally used for its antioxidant, anti-inflammatory and antimicrobial properties. The aim of this study was to evaluate the phytochemical composition and antioxidant activity of...

  • Article
  • Open Access
1 Citations
937 Views
14 Pages

Edge-capping modified MXene membranes with new channels created by lateral nanosheets are of great research significance. After introducing tripolyphosphate (STPP) to Ti edges of Ti3C2Tx nanosheets and fabricating the STPP-MXene membranes edge-cappin...

  • Article
  • Open Access
1 Citations
1,164 Views
17 Pages

Amomum villosum L. is a perennial herbaceous belonging to the ginger family. Due to its unique aroma, it is widely used in alcoholic beverages and food processing. Unfortunately, issues with bitterness and sourness occur, which affect the taste and q...

  • Article
  • Open Access
1 Citations
1,064 Views
15 Pages

Adsorption of Nitrate Ions Using Magnesium-Loaded Bamboo Powder and Nano-Sized Crushed Oyster Shells

  • Harada Hiroyuki,
  • Nur Maisarah Mohamad Sarbani,
  • Aoyagi Misturu and
  • Jun Nishimoto

Excess nitrate ions should be avoided in agriculture as they are absorbed by plants and ingested by humans, which can have serious effects on soil and groundwater. In this study, environmentally friendly bamboo flour and nano-sized oyster shells were...

  • Article
  • Open Access
5 Citations
1,613 Views
17 Pages

Competitive Adsorption Behavior of CO2 and CH4 in Coal Under Varying Pressures and Temperatures

  • Yijin Zhu,
  • Haijian Li,
  • Jiahong Liu,
  • Caiwen Zhou and
  • Yunpeng Zhao

The CO2 injection technology for replacing CH4 to enhance coalbed methane (CBM) recovery (CO2-ECBM) offers dual benefits, i.e., reducing CO2 emissions through sequestration and increasing CBM recovery, thereby leading to economic gains. However, ther...

  • Article
  • Open Access
2 Citations
1,004 Views
12 Pages

Novel Triterpenes and Bioactive Compounds Isolated from Smilax canariensis Brouss. ex Willd

  • Jesús G. Díaz,
  • Samuel Vega,
  • Daniel Ganosa,
  • Pedro Pérez de Paz and
  • David Díaz Diaz

The aerial parts of Smilax canariensis Brouss. ex Willd., an endemic plant species of the Canary Islands and Madeira, were chemically investigated, resulting in the isolation of multiple known and novel compounds. These include known flavonol glycosi...

  • Article
  • Open Access
6 Citations
2,008 Views
17 Pages

To explore anthocyanins in black bean peel, the conditions of ultrasound-assisted deep eutectic solvents (DESs) were screened and optimized using the method of response surface optimization. After that, the purification of the anthocyanins was perfor...

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Separations - ISSN 2297-8739