Article
Engineering, Environmental
Junli Liu, Janna Beckerman
Summary: This study demonstrates the feasibility of using hemp stalks as a sustainable renewable biosorbent for wastewater treatment. The biosorption process efficiently removes heavy-metal pollutants from water.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Chemistry, Physical
Asmaa S. Morshedy, Ahmed A. Galhoum, Abdel Aleem H. Abdel Aleem, Mohamed T. Shehab El-din, Dina M. Okaba, Mohsen S. Mostafa, Hamed Mira, Zhen Yang, Ibrahim E. T. El-Sayed
Summary: Functionalized magnetic chitosan nanocomposites synthesized by grafting alpha-amino-phosphonate functions show excellent Cd(II) removal performance with maximum sorption capacities of 118.1 mg g(-1) and 193.5 mg g(-1) for Me-MCS and Ph-MCS, respectively. The materials exhibit exothermic cadmium sorption, fast uptake, and can be efficiently desorbed for recycling applications. In multi-component solutions, selectivity differences are observed, correlated with the reactive groups and properties of heavy metal ions.
APPLIED SURFACE SCIENCE
(2021)
Article
Engineering, Environmental
Marwa M. Rashad, Ibrahim E. El-Sayed, Ahmed A. Galhoum, Marwa M. Abdeen, Hamed I. Mira, Emad A. Elshehy, Suojiang Zhang, Xingmei Lu, Jiayu Xin, Eric Guibal
Summary: A one-pot synthesis procedure was developed for preparing three alpha-aminophosphonates and evaluating their sorption properties for U(VI) recovery. The sorbents showed optimal uranium sorption at pH 4 with fast equilibrium uptake, and demonstrated good recycling efficiency for at least 4-5 cycles.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Environmental Sciences
Xiaowei Song, Xiaofeng Wu, Xiaoping Song, Cuijie Shi, Zhengdong Zhang
Summary: The study found that both biodegradable and nondegradable plastics interact with petroleum hydrocarbons in a similar manner, serving as transportation vectors for the compounds. Different types of microplastics exhibit variations in sorption capacity, likely related to their crystallinity and rubber state.
Article
Environmental Sciences
F. Noli, M. S. A. Busari Nasiru, P. Tsamos, E. Pavlidou
Summary: This study investigated the use of pomegranate peel, both in raw and modified form, as a biosorbent for the removal of Eu(III) from aqueous solutions. The modified biosorbent showed a significant sorption capacity for europium, and the sorption mechanism was successfully explored using Langmuir and Freundlich linear isotherm equations and pseudo-first- and pseudo-second-order kinetics equations.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Henrik K. Hansen, Claudia Gutierrez, Natalia Valencia, Claudia Gotschlich, Andrea Lazo, Pamela Lazo, Rodrigo Ortiz-Soto
Summary: Heavy metal exposure from wastewater is a global environmental issue. Biosorption is a promising alternative for contaminant removal. This study investigated the operation parameters and biosorbent regeneration for copper adsorption. The results showed that Durvillaea antarctica algae had a higher copper retention capacity at pH 4.5-5.0, and sulfuric acid was the most efficient regenerating reagent. Particle size of 1.70-3.36 mm and a biosorbent mass-to-volume ratio of 10 g L-1 were desirable for diluted copper solutions (10 to 100 mg L-1).
Article
Engineering, Environmental
Vinay Kumar Chintalapudi, Ramya Krishna S. L. Kanamarlapudi, Useni Reddy Mallu, Sudhamani Muddada
Summary: In this study, microorganisms with high resistance to lead ions were isolated and evaluated for their efficiency in removing lead ions from wastewater through biosorption. The optimized conditions for biosorption of Pb (II) were determined, and the biosorption efficiency and capacity of the isolated Brevibacillus strain were analyzed. Surface characterization and analysis of key functional groups involved in biosorption were conducted. The results showed that the biomass of Brevibacillus can be used as a promising biosorbent for the removal of metals, including lead, from wastewater.
WATER SCIENCE AND TECHNOLOGY
(2022)
Article
Chemistry, Analytical
Andromachi Charizani, Fotini Noli
Summary: This study investigated the biosorption of barium onto pomegranate peel and found that the alkali-modified biosorbent had a considerable sorption capacity. The involvement of carboxyl, hydroxyl, and phosphate groups in the sorption process was demonstrated through characterization techniques. Desorption experiments showed that the tested sorbents were effective for radioactive waste management.
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
(2022)
Article
Engineering, Environmental
Rana R. Neiber, Ahmed A. Galhoum, Ibrahim El-Tantawy El Sayed, Eric Guibal, Jiayu Xin, Xingmei Lu
Summary: A one-pot synthesis procedure was designed to prepare two alpha-aminophosphonate-based sorbents. The sorbents were characterized and their sorption properties for Pb(II) were investigated. The mechanisms of metal binding and factors affecting sorption performance were explored.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Environmental Sciences
Mostafa M. S. Ismaiel, Yassin M. El-Ayouty, Saad A. Abdelaal, Hoda A. Fathey
Summary: Activities related to uranium mining and nuclear industry may have negative environmental impacts. This study compared the uranium biosorption efficiency of two immobilized algae and investigated the effects of various factors. The results suggest that immobilized algae can be used for recovery and biosorption of uranium from aqueous solutions.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Engineering, Environmental
A. Safri, A. J. Fletcher, E. Abdel-Halim, M. A. Ismail, A. Hashem
Summary: This study demonstrates that Calligonum crinitum plant is an effective sorbent for the removal of Pb(II) ions from aqueous solutions, showing potential for water treatment applications. Experimental results confirmed optimal adsorption conditions at pH 5.5, adsorbent concentration of 0.3 g/l, and contact time of 20 minutes at 30 degrees Celsius.
JOURNAL OF POLYMERS AND THE ENVIRONMENT
(2021)
Article
Engineering, Environmental
A. Hashem, A. J. Fletcher, A. Safri, A. Ghith, D. M. Hussein
Summary: This study synthesized a new, low-cost sorbent based on wood pulp for the targeted removal of Hg (II) from aqueous solutions, with the sorption process influenced by surface heterogeneity. The sorbents showed remarkable potential for Hg (II) removal, with the system following a pseudo-second-order kinetic model.
JOURNAL OF POLYMERS AND THE ENVIRONMENT
(2021)
Article
Biotechnology & Applied Microbiology
Saloni Sharma, Hema Setia, Amrit Pal Toor
Summary: This study demonstrates the potential of using isolated bacterial strain WAH1 for biodegradation of Diclofenac Sodium (DS), showing strong adaptive ability and degradation efficiency at high DS concentrations. The results suggest a promising application of the strain WAH1 in the treatment of DS contaminated sites.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2021)
Article
Engineering, Chemical
Salem Elfeghe, Shams Anwar, Lesley James, Yahui Zhang
Summary: The removal of Cu(II) from an acidic solution using commercial resins Dowex G-26 and Puromet(TM) MTS9570 was investigated. The study found that both resins exhibited high adsorption capacities and favorable adsorption kinetics.
CANADIAN JOURNAL OF CHEMICAL ENGINEERING
(2023)
Article
Environmental Sciences
Esra Bilgin Simsek, Didem Saloglu, Ahmet Alper Aydin
Summary: This study investigated the immobilization of LPZM on PEGDMA/APTES for the adsorption and biosorption of nicotine. The immobilization process significantly altered the thermal behavior, surface characteristics, and surface morphology of PEGDMA/APTES. The immobilization yields were 85.0% (physical adsorption) and 72.0% (covalent immobilization), with a nicotine removal efficiency of 98.9%. The PEGDMA/APTES@LPZM showed satisfactory reusability in real water matrices.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Chemistry, Analytical
Kevin Yemele Tajeu, Ervice Ymele, Sherman Lesly Zambou Jiokeng, Ignas Kenfack Tonle
Article
Chemistry, Analytical
Arlette Danelle Djitieu Deutchoua, Yannick Ngueumaleu, Gustave Kenne Dedzo, Ignas Kenfack Tonle, Emmanuel Ngameni
Article
Electrochemistry
Serge Mbokou Foukmeniok, Ousmane Ilboudo, Evangeline Njanja, Issa Tapsoba, Maxime Pontie, Ignas Tonle Kenfack
JOURNAL OF APPLIED ELECTROCHEMISTRY
(2019)
Article
Electrochemistry
Sherman L. Z. Jiokeng, Liliane M. Dongmo, Ervice Ymele, Divine B. Nde, Ignas K. Tonle
ELECTROCHIMICA ACTA
(2019)
Article
Chemistry, Analytical
Sherman L. Z. Jiokeng, Ignas K. Tonle, Alain Walcarius
SENSORS AND ACTUATORS B-CHEMICAL
(2019)
Article
Chemistry, Analytical
Lydiane G. Djemmoe, Evangeline Njanja, Francis M. M. Tchieno, Derek T. Ndinteh, Patrick G. Ndungu, Ignas K. Tonle
INTERNATIONAL JOURNAL OF ENVIRONMENTAL ANALYTICAL CHEMISTRY
(2020)
Article
Chemistry, Analytical
Delmas Vidal Tabe Ebunang, Kevin Yemele Tajeu, Chancellin Nkepdep Pecheu, Sherman Lesly Zambou Jiokeng, Arnaud Kamdem Tamo, Ingo Doench, Anayancy Osorio-Madrazo, Ignas Kenfack Tonle, Emmanuel Ngameni
Summary: In this work, an electrode modified with an amino-functionalized clay mineral was used for the electrochemical analysis and quantification of quercetin. The modification of the electrode was confirmed to be effective, and the experimental conditions were optimized for linear detection of quercetin concentration. The selectivity of the sensor in the presence of interfering species was also evaluated.
Article
Polymer Science
Gael Ferdinand Kaze Nindjio, Rufis Fregue Tiegam Tagne, Sherman Lesly Zambou Jiokeng, Cyrille Ghislain Fotsop, Aurelien Bopda, Giscard Doungmo, Ranil Clement Tonleu Temgoua, Ingo Doench, Estella Tamungang Njoyim, Arnaud Kamdem Tamo, Anayancy Osorio-Madrazo, Ignas Kenfack Tonle
Summary: In this study, biomass lignocellulosic materials were used to optimize the removal of Indigo Carmine from aqueous medium. The physicochemical properties of the materials were investigated, and the key variables influencing the adsorption of Indigo Carmine were optimized using a design of experiments methodology. The results showed that the biomass materials have great potential for the efficient removal of waste and dyes in liquid effluents.
Article
Chemistry, Multidisciplinary
Chancellin Nkepdep Pecheu, Sherman Lesly Zambou Jiokeng, Arnaud Kamdem Tamo, Giscard Doungmo, Ingo Doench, Anayancy Osorio-Madrazo, Ignas Kenfack Tonle, Emmanuel Ngameni
Summary: This article introduces a synthesis method and application of a talc-like material functionalized with amine groups (TalcNH(2)) as an electrochemical sensor material. The study investigates the performance of TalcNH(2) modified glassy carbon electrode (GCE). The results demonstrate the good charge selectivity ability and high sensitivity for the determination of Pb(II) ions.
Article
Crystallography
Jimmy Julio Kouanang Ngouoko, Kevin Yemele Tajeu, Cyrille Ghislain Fotsop, Arnaud Kamdem Tamo, Giscard Doungmo, Ranil Clement Tonleu Temgoua, Theophile Kamgaing, Ignas Kenfack Tonle
Summary: In this study, snail shells calcined at different temperatures were analyzed using various characterization techniques. The main objective was to identify different forms of calcium carbonate and calcium hydroxide in the shells. The obtained calcium hydroxide played a crucial role in the synthesis of the hydroxyapatite/L-lysine composite. By using the composite to chemically modify an electrode, it was found that electronic transfer was facilitated and the modified electrode exhibited positive charge in strongly acidic medium, showing good affinity with a certain substance. Furthermore, the composite showed excellent sensor performance in toluidine blue electroanalysis.
Article
Biochemistry & Molecular Biology
Chancellin Nkepdep Pecheu, Victor Kougoum Tchieda, Kevin Yemele Tajeu, Sherman Lesly Zambou Jiokeng, Andreas Lesch, Ignas Kenfack Tonle, Emmanuel Ngameni, Christoph Janiak
Summary: This study presents an amperometric sensor for the electroanalytical detection of epinephrine using a chemically modified inkjet-printed graphene electrode. The sensor exhibited higher sensitivity to epinephrine compared to the bare electrode. It was successfully applied for the determination of epinephrine in pharmaceutical preparations, with detection limits of 0.34μM and 0.26μM.
Article
Chemistry, Analytical
Ervice Ymele, Sherman Lesly Zambou Jiokeng, Divine Bup Nde, Theophile Kamgaing, Ignas Kenfack Tonle
JOURNAL OF ANALYSIS AND TESTING
(2019)
Article
Multidisciplinary Sciences
Serge Mbokou Foukmeniok, Ousmane Ilboudo, Yssouf Karanga, Issa Tapsoba, Evangeline Njanja, Ignas Tonle Kenfack
SN APPLIED SCIENCES
(2019)
Article
Multidisciplinary Sciences
Evangeline Njanja, Serge Foukmeniok Mbokou, Maxime Pontie, Mouna Nacef, Ignas Kenfack Tonle
SN APPLIED SCIENCES
(2019)
Article
Crystallography
Patrice Kenfack Tsobnang, Armelle Tsamo Tontsa, Pierre Mkounga, Augustin Ephrem Nkengfack, Ignas Tonle Kenfack
ACTA CRYSTALLOGRAPHICA SECTION E-CRYSTALLOGRAPHIC COMMUNICATIONS
(2018)
