Article
Metallurgy & Metallurgical Engineering
Qian Xiao, Xueyu Wang, Lianjun Song, Fengfeng Li, Qiuju Li, Lanlan He, Zhen Shen, Fangxiang Luo, Songdong Ding
Summary: A novel Et-TolDAPhen extraction resin was prepared by impregnating Amberlite XAD-7 resin with a phenanthroline-derived diamide extractant. This new extraction resin exhibited strong adsorption capacity, excellent selectivity, and good reusability for Pd2+ in highly acidic HNO3 solution.
Article
Food Science & Technology
Berrin Topuz, Ece Talya Altinisik
Summary: A simultaneous preconcentration and determination procedure using AXAD-1180 as the solid phase extraction material and 2,6-dimethylmorpholinedithiocarbamate (DMMDTC) as the chelating agent has been proposed for the spectrophotometric determination of Cu(II), Ni(II), and Co(II) in food and environmental samples. Various parameters affecting the trace metal ion recovery were investigated, and the DMMDTC complexes retained on Amberlite XAD-1180 were eluted using 10 mL of 1 M HNO3 (in acetone). The developed method allows for preconcentration and separation of Cu(II), Ni(II), and Co(II) ions, followed by their simultaneous determination using UV-Vis spectrophotometry.
FOOD ANALYTICAL METHODS
(2023)
Article
Chemistry, Analytical
I. Morales-Benitez, P. Montoro-Leal, J. C. Garcia-Mesa, M. M. Lopez Guerrerp, E. Vereda Alonso
Summary: A novel method for Cr(III) and Cr(VI) speciation in environmental samples was developed using magnetic nanoparticles coupled to graphene oxide. The method combined inductively coupled plasma optical emission spectrometry with on-line magnetic solid phase extraction. The synthesized sorbent material showed good performance with low detection limits and high enrichment factors. The developed method was successfully applied to analyze chromium speciation in environmental water samples, showing good agreement with certified values and high recoveries for spiked samples.
Article
Engineering, Environmental
Wei Zhang, Ji Ou, Meiyi Tang, Qiulai He, Anlin Long, Shuangxue Luo, Shiquan Sun, Junli Wan, Yang Gao, Lean Zhou, Bin Wang, Hongyu Wang
Summary: In this study, an alginate-based porous nanocomposite hydrogel (CPGA) was developed for enhanced Cu(II) removal from water. The CPGA exhibited good adsorption performance and anti-interference ability, and showed potential for heavy metal removal from water in multi-ions system. The study also demonstrated the good cycle stability of CPGA.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Biochemistry & Molecular Biology
Nokwanda Hendricks, Olatunde Olatunji, Bhekumuzi Gumbi
Summary: This study presents an accurate model for estimating the number of nanoparticles from the mass and molar concentration of gold nanoparticles in water. The method was validated by synthesizing and characterizing citrate-capped AuNPs and applying it to environmental matrices spiked with AuNPs.
Article
Chemistry, Multidisciplinary
Shaun G. Bevers, Casey Smith, Stephanie Brown, Nathan Malone, D. Howard Fairbrother, Aaron J. Goodman, James F. Ranville
Summary: Nanomaterials play a crucial role in environmental processes, but characterizing and quantifying them in environmental matrices is challenging. This study demonstrates the deleterious effects of particle-based backgrounds on the analysis of particle number concentration and particle size distribution using single particle inductively coupled plasma mass spectrometry. A novel methodology is proposed to minimize the effects of particle coincidence and model the particle size distribution accurately. The significance of this methodology is demonstrated through the analysis of environmentally relevant nanomaterials and colloids.
ENVIRONMENTAL SCIENCE-NANO
(2023)
Article
Chemistry, Analytical
Sergio J. Abellan-Martin, David Villalgordo-Hernandez, Miguel Angel Aguirre, Enrique V. Ramos-Fernandez, Javier Narciso, Antonio Canals
Summary: A new environmentally friendly analytical method using ICP OES and MDSPE techniques has been developed for the simultaneous determination of multiple metal elements in wastewater. The method was optimized and evaluated, demonstrating high sensitivity and negligible matrix effects.
Article
Chemistry, Analytical
Ronja Suvela, Matti Niemela, Paavo Peramaki
Summary: The present study introduces a new and selective analysis method for determining low xanthate concentrations. This study addresses the growing concern over the environmental impact of xanthates and the need for reliable analysis methods. The method utilizes the complex formation between xanthates and various metal ions in aqueous solution, followed by liquid-liquid extraction and high-performance liquid chromatography, to accurately determine xanthates. By using Cu(II) as the complex metal ion, good separation and high measurement sensitivity are achieved. The method has been optimized for sodium isopropyl xanthate and sodium isobutyl xanthate, with detection limits of 24.7 μg/L and 13.3 μg/L, respectively. With a linear calibration range of 0.1-15 mg/L and a total analysis time of 4-5 min, this method offers a fast and sensitive option for selective xanthate determination.
JOURNAL OF SEPARATION SCIENCE
(2023)
Review
Instruments & Instrumentation
Qingsheng Bai, Yongguang Yin, Yanwanjing Liu, Haowen Jiang, Mengxin Wu, Weidong Wang, Zhiqiang Tan, Jingfu Liu, Myeong Hee Moon, Baoshan Xing
Summary: Due to the increased applications of engineered elemental metal nanoparticles (EMNPs) in recent years, their release into the environment has gained attention. The on-line coupling of flow field-flow fractionation with inductively coupled plasma mass spectrometry (F4-ICPMS) has been well established for the characterization of EMNPs in complex matrices of environmental samples. This review focuses on the specific advantages of the F4 method and recent advances in the application of F4-ICPMS techniques in examining the occurrence and transformation of EMNPs in the environment.
APPLIED SPECTROSCOPY REVIEWS
(2023)
Article
Chemistry, Analytical
Natalia Manousi, Abuzar Kabir, Kenneth G. Furton, George A. Zachariadis, Aristidis Anthemidis
Summary: A simple and sensitive on-line sorbent extraction platform coupled with flame atomic absorption spectrometry was developed for trace metals determination in this study. The system utilized a novel sol-gel thiocyanatopropyl functionalized silica as adsorbent and investigated the main factors affecting system performance. The proposed method showed good precision and efficient preconcentration for target analytes.
Article
Environmental Sciences
Mashael K. Bin Ateeq, Nouf M. Bin Durayhim, Meral M. Sulayem, Waad A. Al-Qahtani, Nezar H. Khdary, Ahmed M. Alhassan, Fatimah Mohammed A. Alzahrani, Khadijah Mohammedsaleh M. Katubi, Norah Salem Alsaiari
Summary: This study presents a novel method for ultra-trace Hg(II) determination in water based on a flexible extraction and preconcentration technique, which involves functionalizing carbon fibers. The use of gold nanoparticles is shown to enhance Hg(II) detection precision and eliminate memory effects in the results.
Article
Engineering, Environmental
Garret D. Bland, Peng Zhang, Eugenia Valsami-Jones, Gregory V. Lowry
Summary: This study determined the isotope enrichment needed for Ti-47-enriched TiO2 ENMs to be detectable in soil and assessed the effects of weathering on those requirements for less soluble TiO2 and more soluble CuO ENMs. The results showed that approximately 10 wt % Ti-47 isotope-enrichment was required to distinguish a similar to 70 nm diameter TiO2 ENM from TiO2 NNMs in Lufa 2.2 soil.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
Article
Environmental Sciences
A. Islam, N. Zaidi, H. Ahmad, S. Kumar
INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY
(2019)
Article
Chemistry, Analytical
Anjali Chauhan, Aminul Islam, Hina Javed, Suneel Kumar
MICROCHEMICAL JOURNAL
(2019)
Article
Engineering, Chemical
Suneel Kumar, Aminul Islam, Hilal Ahmad, Noushi Zaidi
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2019)
Article
Chemistry, Applied
Saman Rais, Aminul Islam, Izhar Ahmad, Suneel Kumar, Anjali Chauhan, Hina Javed
Summary: A new magnetic Cu(II) IIP was synthesized by polymerization of specific functionalized substances, which can efficiently remove Cu(II) and achieve quantitative determination. The optimal parameter design, good model fitting, and excellent analytical properties make this material a promising candidate for applications in food and wastewater.
Article
Thermodynamics
Aminul Islam, Hina Javed, Anjali Chauhan, Izhar Ahmad, Saman Rais
Summary: A hydrophilic sandwich-like graphene oxide ion-imprinted polymer was successfully synthesized for preconcentration of Ni(II), demonstrating good selectivity, high adsorption capacity, and fast chemical kinetics. Compared to the nonimprinted polymer control, the imprinted polymer showed higher recognition ability and regeneration stability.
JOURNAL OF CHEMICAL AND ENGINEERING DATA
(2021)
Article
Green & Sustainable Science & Technology
Aminul Islam, Anjali Chauhan, Hina Javed, Saman Rais, Izhar Ahmad
Summary: Through the synthesis of magnetic carbon nanotubes-silica composite mCNT@APS, this study achieved excellent adsorption performance for lead, particularly suitable for the removal of Pb(II) from industrial effluents and tap water. The optimized conditions were pH 5.4, feed concentration 757 μg mL(-1) and contact time 4 min, exhibiting high saturation capacity and chemical adsorption characteristics.
CLEAN-SOIL AIR WATER
(2021)
Article
Environmental Sciences
Aminul Islam, Anjali Chauhan
Summary: A new Cd(II)-imprinting polymer was synthesized and used for the development of a dispersive magnetic solid-phase extraction method for the determination of Cd(II) in environmental samples. The material exhibited promising adsorption capacity and fast kinetics, making it a potential candidate for Cd(II) determination in various samples.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Polymer Science
Aminul Islam, Hina Javed
Summary: A new tailor-fitted graphene oxide-vinyl pyridine ion-imprinted polymer (mGOVP/IIP) was synthesized and applied for the preconcentration and determination of Cu(II). The material showed high sorption capacity, fast kinetics, and good selectivity and regeneration efficiency.
JOURNAL OF APPLIED POLYMER SCIENCE
(2022)
Article
Green & Sustainable Science & Technology
Aminul Islam, Sana Fatima
Summary: A multifunctional aerogel, Zr-IMDT/rGOA, was synthesized by functionalizing graphene oxide with ZrCl4 and 2-imidazolidinethione. It exhibited excellent removal performance for fluoride ions and anionic dyes. The aerogel showed high selectivity for fluoride ions and could be regenerated for multiple cycles, making it suitable for groundwater and wastewater treatment.
CLEAN-SOIL AIR WATER
(2023)
Article
Chemistry, Multidisciplinary
Aminul Islam, Sana Fatima
Summary: This study focuses on the removal of Cu(II) from aqueous environments due to its potential risks to human health. A magnetic hybrid aerogel (mGO-TETA-MWCNT) was synthesized through self-assembly of magnetic graphene oxide (mGO) and multiwalled carbon-nanotubes (MWCNT) functionalized with triethylenetetramine (TETA) via hydrothermal reduction. The prepared adsorbent showed high adsorption capacity for Cu(II) removal and exhibited good selectivity in the presence of other interfering metal ions. The aerogel can be regenerated for multiple cycles and successfully applied for Cu(II) removal from different water sources.