Sumbul Hafeez

Removal of Congo Red Dye from Aqueous Solution via Natural Seeds Integrated with Zinc Oxide-Doped Manganese Ferrite

Elham A. Alzahrani, Ghaida H. Munshi, Abeer Mohammed Al-Balawi, Salwa D. Al-Malwi et autres

This study reports the preparation of a nanocomposite using a black cumin surface as a carbon framework on which zinc oxide-doped manganese ferrite nanoparticles were deposited and grown. A simple precipitation method was used to prepare the nanocomposite. The resulting composite was …

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Manganese Ferrite/Guava Leaf Nano-Bio Composite for Adsorptive Removal of Methylene Blue Dye from Water

Noufal Komby Abdulla, Elham A. Alzahrani, Ghaida H. Munshi, Abeer Mohammed Al-Balawi et autres

In this study, manganese ferrite was grown on the surface of a low-cost powder substrate of a guava leaf using the co-precipitation method. The resulting material was characterized using various spectroscopic and microscopic techniques. The composite was formed through the electrostatic and …

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The Effects of Biochar on the Revival and Performance of an Organohalide-Respiring Mixed Culture

Weilun Zhao, Hongyu Dang, Han Cao, Sumbul Hafeez et autres

High Resolution Image Download MS PowerPoint Slide Anaerobic reductive dechlorination of chlorinated ethenes (CEs) in groundwater, driven by bioaugmentation of organohalide-respiring bacteria (OHRB), can stall when OHRB abundance and activity are low, leading to incomplete dechlorination and daughter-product accumulation. Pyrogenic carbonaceous matter …

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6-Amino Caproic Acid-Modified CuFe2O4 Nanocomposite for Amaranth Dye Removal: Optimization, Thermodynamics, and Isotherm Studies

Rabia Ahmed, Ghaida H. Munshi, Abeer Mohammed Al-Balawi, Salwa D. Al-Malwi et autres

In this work, 6-aminocaproic acid-modified copper ferrite nanoparticles were synthesized and used as an adsorbent for removing Amaranth dye from water. The modified nanoparticles were easily prepared using a simple and cost-effective method, namely the coprecipitation method. The nanocomposite was characterized by …

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An Easy and Single-Step Biosynthesis of WO3 with High Photocatalytic Degradation Activity for Dye Degradation

Azza A. Al‐Ghamdi, Reema H. Aldahiri, Elham A. Alzahrani, Naha Meslet Alsebaii et autres

In the present study, a photodegradation technique was employed for the removal of methylene blue dye from aqueous solution using a tungsten oxide-based photocatalyst. The photocatalyst was synthesized via a green synthesis route utilizing a plant extract (PE) under acidic conditions. The …

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Fe3O4/BC for Methylene Blue Removal from Water: Optimization, Thermodynamic, Isotherm, and Kinetic Studies

Sharf Ilahi Siddiqui, Naha Meslet Alsebaii, Azza A. Al‐Ghamdi, Reema H. Aldahiri et autres

In this research, a nanoscale magnetic biosorbent was synthesized by incorporating magnetic nanoparticles (Fe3O4 NPs) into a natural carbon framework derived from black cumin (BC) seeds. The prepared Fe3O4/BC was utilized as a low-cost, eco-friendly, and reusable nanobiosorbent for the removal of …

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Natural Phenolic-Aromatic-Compound-Based Fe-Zr Binary Oxide Nanoparticles for Eosin Yellow Adsorption Application

Reema H. Aldahiri, Naha Meslet Alsebaii, Azza A. Al‐Ghamdi, Manoj Kumar Khanna et autres

This manuscript explores the removal of eosin yellow dye, a toxic color substance contributing to water pollution, from aqueous solutions. For this purpose, iron-zirconia binary oxide (Fe2O3-ZrO2) was functionalized with eugenol oil, a natural phenolic aromatic compound extracted from the clove plant. …

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Correction to “Novel Conductive and Redox-Active Molecularly Imprinted Polymer for Direct Quantification of Perfluorooctanoic Acid”

Sumbul Hafeez, Aysha Khanam, Han Cao, Brian P. Chaplin et autres

[This corrects the article DOI: 10.1021/acs.estlett.4c00557.].

Biodegradable Acid-Based Fe2MnO4 Nanoparticles for Water Remediation

Rabia Ahmad, Elham A. Alzahrani, Poonam Dwivedi, Sumbul Hafeez et autres

This study demonstrated the synthesis of Fe2MnO4 modified by citric acid, a biodegradable acid, using a simple co-precipitation method. Characterization was performed using qualitative analysis techniques such as Fourier-transformed infrared spectroscopy, scanning electron microscopy equipped with energy-dispersive X-ray spectroscopy, X-ray diffraction, selected-area …

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Novel Conductive and Redox-Active Molecularly Imprinted Polymer for Direct Quantification of Perfluorooctanoic Acid

Sumbul Hafeez, Aysha Khanam, Han Cao, Brian P. Chaplin et autres

High Resolution Image Download MS PowerPoint Slide This study developed a novel molecularly imprinted polymer (MIP) that is both conductive and redox-active for directly quantifying perfluorooctanoic acid (PFOA) electrochemically. We synthesized the monomer 3,4-ethylenedioxythiophene-2,2,6,6-tetramethylpiperidinyloxy (EDOT-TEMPO) for electropolymerization on a glassy carbon electrode …

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MnO2 decoration onto the guava leaves: A sustainable and cost-effective material for methylene blue dye removal

Noufal Komby Abdulla, Elham A. Alzahrani, Poonam Dwivedi, Shruti Goel et autres

Excessive number of dyes in water is becoming the main cause of water pollution, which is very important to remove because it is harmful. Dye contaminated water is being treated by various methods. Adsorption method can be considered best for the study …

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Cu-Zn coupled heterojunction photocatalyst for dye degradation: Performance evaluation based on the quantum yield and figure of merit

Elham A. Alzahrani, Poonam Dwivedi, Bushra Fatima, Sumbul Hafeez et autres

This study reports the production of a heterojunction copper oxide-zinc oxide nano-photocatalyst based on lemon leaf extract, which acted as both a stabilizer and a capping and reducing agent. The fabricated photocatalyst had a smooth surface with numerous functional groups, and its …

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