Article
Environmental Sciences
Mohammed F. Hamza, Hanaa A. Abu Khoziem, Mahmoud S. Khalafalla, Walid M. Abdellah, Doaa Zaki, Khalid Althumayri, Yuezhou Wei
Summary: The development of new materials based on biopolymers is important for the removal of heavy metal and radionuclide ions in environmental contamination. Chitosan functionalized with sulfonic groups was effective for improving uranium sorption, both in slightly acidic leachate and underground water. The prepared hydrogel was characterized using various analysis methods, and its sorption behavior and stability were studied.
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
Engineering, Environmental
Jing-Jie Guo, Fen Li, Hai-Chuan Xiao, Bai-Lin Liu, Lin-Nan Feng, Peng-Fei Yu, Can Meng, Hai-Ming Zhao, Nai-Xian Feng, Yan-Wen Li, Quan-Ying Cai, Lei Xiang, Ce-Hui Mo, Qing X. Li
Summary: This study investigated the effects and mechanisms of microplastics (MPs) on the sorption-desorption, bioaccessibility, and bioavailability of cadmium (Cd) in paddy soil. The experiments showed that MPs significantly reduced Cd sorption in soil by covering the soil active sites and interrupting formation of CdCO3 and Cd3P2 precipitates. This led to an increase in Cd bioaccessibility and bioavailability in soil. The findings provide new insights into the impacts of MPs on the fate and risk of heavy metals in agricultural soil.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Biochemistry & Molecular Biology
Monika Mahmud, Md Sahadat Hossain, Mashrafi Bin Mobarak, Sazia Sultana, Suriya Sharmin, Samina Ahmed
Summary: In this study, oleic acid-coated cobalt ferrite was synthesized for the removal of Pb(II) ions from an aqueous solution. The material exhibited high adsorption capacity and showed no cytotoxicity, making it a promising adsorbent for the aquatic environment.
CHEMISTRY AND ECOLOGY
(2022)
Article
Engineering, Environmental
Mohammed F. Hamza, Khalid A. M. Salih, Adel A. -H. Abdel-Rahman, Yasser E. Zayed, Yuezhou Wei, Jie Liang, Eric Guibal
Summary: The one-pot synthesis of A(L)PEI beads, followed by functionalization, significantly improves the sorption properties for rare earth elements (REEs) with high sorption capacities. The selective sorbent has a strong preference for Sc(III) and shows efficient recovery of valuable metals from industrial solutions, even in the presence of heavy metal contaminants.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Environmental Sciences
Chaamila Pathirana, Abdul M. Ziyath, Prasanna Egodawatta, Nilanthi J. G. J. Bandara, K. B. S. N. Jinadasa, Erick R. Bandala, Buddhi Wijesiri, Ashantha Goonetilleke
Summary: This study identifies a method for determining the breakthrough time of a column sorption system used in industrial water treatment. Laboratory column set-up requires significant resources, so a more resource-efficient batch experiment can be used to estimate the breakthrough time of a column system.
Article
Environmental Sciences
Ula Rozman, Barbara Klun, Gregor Marolt, Jernej Imperl, Gabriela Kalcikova
Summary: In this study, the adsorption and subsequent desorption of titanium dioxide (nTiO2) and zinc oxide (nZnO) nanoparticles, as well as polyethylene microplastics (MPs), in aquatic media were investigated. The results showed that nZnO had a faster adsorption rate than nTiO2, but nTiO2 had a higher adsorption extent on MPs. The low adsorption of nZnO could be attributed to the partial dissolution of zinc from nZnO, which resulted in soluble zinc complexes not being adsorbed on MPs. The adsorption process was found to be controlled by physisorption for both nTiO2 and nZnO. Meanwhile, the desorption of nTiO2 was low and independent of pH, while the desorption of nZnO was pH-dependent, with a higher desorption rate at a slightly acidic pH. These findings provide insights into the complex interactions and fate of MPs and metal engineered nanoparticles in the aquatic environment.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
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
Multidisciplinary Sciences
Kaustav Bhattacharyya, Neelanjan Bhattacharjee, Subhadeep Ganguly
Summary: Cadmium is a dreadful heavy metal, which is becoming a major toxicant in ground water with concentration exceeding the WHO Guidelines in drinking water. The potential sources of cadmium include sewage sludge, phosphate fertilizers, and various ingredients. The authors evaluated the growth and Cd(II) remediation capacity of a Cd(II) resistant yeast strain named Candida tropicalis XTA 1874. By analyzing the optimization conditions, a synthetic medium was developed which significantly enhanced the strain's Cd(II) adsorption capacity.
SCIENTIFIC REPORTS
(2023)
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)
Review
Materials Science, Multidisciplinary
Aleksandra Nastasovic, Bojana Markovic, Ljiljana Surucic, Antonije Onjia
Summary: The increasing demand for precious and rare earth elements due to industrialization and urbanization expansion has raised the need for efficient methods to remove heavy metals from wastewaters and aqueous solutions. Adsorption is considered the most efficient technique, with methacrylate-based magnetic and non-magnetic porous sorbents being particularly attractive. This review discusses the main adsorption parameters, kinetic models, adsorption isotherms, thermodynamics, and regeneration of polymeric sorbents.
Article
Chemistry, Applied
Ahmed A. Galhoum, Takaya Akashi, Mikko Linnolahti, Janne T. Hirvi, Abdullah G. Al-Sehemi, Abul Kalam, Eric Guibal
Summary: Polyglycidyl methacrylate (PGMA) was functionalized to improve the sorption of Nd(III). The modified materials, A-PGMA and P-PGMA, exhibited higher sorption capacities compared to the pristine N-PGMA. The sorption isotherms were modeled using the Langmuir equation, and the sorption process was found to be endothermic, spontaneous, and governed by intraparticle diffusion. The sorbents showed high selectivity towards Nd(III) in pre-treated leachate of Egyptian monazite.
REACTIVE & FUNCTIONAL POLYMERS
(2022)
Article
Environmental Sciences
A. Ahmadian, B. A. Goharrizi, T. Shahriari, S. Ahmadi
Summary: Lemon peel biochar was used as an adsorbent to remove chromium (VI) and Acid Orange 7 from acidic and basic solutions. The physicochemical properties of the biochar were analyzed, and response surface method was used to optimize the adsorption parameters. Under optimal conditions, the maximum adsorption capacities for Cr (VI) and Acid Orange 7 were obtained. Langmuir isotherm and pseudo-second-order kinetic models fit well with the experimental data, indicating multilayer adsorption with chemical interactions. Therefore, lemon peel biochar can effectively adsorb chromium (VI) and Acid Orange 7 in acidic and basic solutions.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY
(2023)
Article
Environmental Sciences
Jonas Bayuo, Mwemezi J. Rwiza, Kelvin Mark Mtei
Summary: The sequestration of heavy metals is crucial to protect the environment and human health. Using bio-adsorbents for heavy metal removal from water is efficient and cost-effective. This study investigates the interaction between arsenic and mercury in a binary sorption system, and the results show that the bio-adsorbent can effectively remove mercury in the presence of arsenic. The bio-adsorbent is mechanically stable and reusable, making it suitable for industrial applications.
ENVIRONMENTAL MONITORING AND ASSESSMENT
(2023)