Article
Environmental Sciences
Harini Methma Perera, Anushka Upamali Rajapaksha, Sudantha Liyanage, Anusha Ekanayake, Rangabhashiyam Selvasembian, Achlesh Daverey, Meththika Vithanage
Summary: A novel Chitosan-modified Mimosa pigra biochar (CMPBC) was found to have higher efficiency in removing hexavalent chromium (Cr(VI)) from aqueous systems compared to pristine biochar. The sorption of Cr(VI) was heavily dependent on pH, with the highest adsorption occurring at pH 3.0. The results suggest the potential use of CMPBC as an easily available, environmentally sustainable, and inexpensive sorbent for the decontamination of Cr(VI) from water.
ENVIRONMENTAL RESEARCH
(2023)
Article
Chemistry, Physical
Zhi-lei Zeng, Chuang Yu, Rao -ping Liao, Xiaoqing Cai, Zhi-hao Chen, Zhaokai Yu, Ze-xiang Wu
Summary: This study developed a carboxylate polymer grafted montmorillonite to improve the adsorption capacity of heavy metals. The structural changes of montmorillonite before and after modification were characterized. The results showed that the modified method significantly enhanced the adsorption performance of montmorillonite for cadmium ions.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2023)
Article
Green & Sustainable Science & Technology
Zhewen Chen, Nianze Wu, Yuying Song, Junchen Xiang
Summary: This study investigated the mechanical properties, sulfate resistance, and pore structure distribution of basalt fiber-biochar-concrete (PFB). The results showed that the compressive strength of PFB increased by 2.5% and the flexural strength increased by 12%. Biochar effectively adsorbed heavy metals and reduced their leaching concentration by 50-70%. Basalt fiber improved the mixing performance of concrete, and biochar filled micro pores.
Article
Environmental Sciences
Jia Fu Chin, Zeng Wei Heng, Hui Chieh Teoh, Woon Chan Chong, Yean Ling Pang
Summary: This review evaluates the feasibility of chitosan-modified magnetic biochar for heavy metal removal, by critically analyzing the existing research and reviewing the methods of modification, physicochemical changes, and adsorption performances. It also analyzes kinetic and isotherm models, as well as the operating parameters that affect the adsorption process.
Review
Engineering, Environmental
Chen Liu, He-Xin Zhang
Summary: With the rapid growth of new-energy batteries and metallurgical industry, the issue of metal pollution in wastewater has become increasingly severe, prompting the urgent need for the development of biochar-based adsorbents. Modified biochar has been identified as an effective solution for enhancing heavy-metal adsorption efficiency.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Engineering, Environmental
Xuan Guo, Jianlong Wang
Summary: This paper established artificial neural network (ANN) models to predict the sorption capacity of heavy metal ions onto microplastics in global aquatic environments. The predicted sorption capacity was influenced by the initial concentration of heavy metal ions and the salinity in surrounding water. Aged microplastics had higher affinity to heavy metal ions than virgin microplastics, with larger microplastics showing less sorption of Cd, Pb, and Zn ions. The laboratory studies were found to provide useful information for projecting the sorption capacity of heavy metal ions onto microplastics in global aquatic environments.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Agricultural Engineering
Dhirar Ben Salem, Abdelkader Ouakouak, Fouzia Touahra, Noureddine Hamdi, Abdelazeem S. Eltaweil, Asad Syed, Ramaraj Boopathy, Hai Nguyen Tran
Summary: This study aimed to develop a new material, MBA-bead, by combining the properties of magnetic-biochar derived from peanut shells and hydrogel bead, and investigate its ability to adsorb Cu2+ in water. The MBA-bead contained a high water content of around 90% and had a diameter of approximately 3 mm (wet form) and 2 mm (dried form). It exhibited a specific surface area of 262.4 m(2)/g and a total pore volume of 0.751 cm(3)/g. The Langmuir maximum adsorption capacity of MBA-bead for Cu2+ was found to be 234.1 mg/g at 30 degrees C and pH(eq) 5.0. The primary adsorption mechanisms involved complexation, ion exchange, and Van der Waals force. Furthermore, the laden MBA-bead could be reused multiple times after desorbing with NaOH or HCl. The cost estimation for producing the materials indicated that MBA-bead has potential as an effective adsorbent for removing Cu2+ ions from water.
BIORESOURCE TECHNOLOGY
(2023)
Article
Environmental Sciences
Yan Li, Liangmin Gao, Yu Wang, Shuo Cheng, Guowei Wu, Xuan Yang, Shunli Wan
Summary: Impregnating hydrated ferric oxide nanoparticles within biochar bearing charged oxygen-containing groups can improve adsorption performance for heavy metal cleanup, promoting dispersion and showing good adsorption selectivity. Furthermore, HNO3 treatment can enhance desorption efficiency of the adsorbent, providing a feasible regeneration method for fixed-bed column application.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Biochemistry & Molecular Biology
Claudiu-Augustin Ghiorghita, Maria Marinela Lazar, Ioana-Victoria Platon, Doina Humelnicu, Florica Doroftei, Maria Valentina Dinu
Summary: Ultra-lightweight thiourea-chitosan (CSTU) aerogels with excellent properties, including low densities, high specific surface areas, fast sorption rates, and remarkable recycling stability, have been developed for the removal of heavy metal ions and antimicrobial applications.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Review
Environmental Sciences
Ghulam Murtaza, Zeeshan Ahmed, Dong-Qin Dai, Rashid Iqbal, Sami Bawazeer, Muhammad Usman, Muhammad Rizwan, Javed Iqbal, Muhammad Irfan Akram, Abdullah Safar Althubiani, Akash Tariq, Iftikhar Ali
Summary: Water contamination is a serious issue with associated health risks. Biochar (BC) has been recognized as an effective material for remediation. However, limitations in its properties can be addressed through modification methods to improve its decontamination functionalities. BC-based composites, synthesized by mixing BC with various modifiers, show high adsorption ability against aquatic pollutants, making them efficient in water decontamination.
FRONTIERS IN ENVIRONMENTAL SCIENCE
(2022)
Article
Environmental Sciences
Hanbo Chen, Yurong Gao, Jianhong Li, Chenghua Sun, Binoy Sarkar, Amit Bhatnagar, Nanthi Bolan, Xing Yang, Jun Meng, Zhongzhen Liu, Hong Hou, Jonathan W. C. Wong, Deyi Hou, Wenfu Chen, Hailong Wang
Summary: This study successfully removed antimonite from water using biochars derived from crawfish shells, and found that surface complexation was the main mechanism of adsorption. The results of this study showed the potential of biochars for antimonite removal.
Article
Environmental Sciences
Han-Saem Lee, Hyun-Sang Shin
Summary: This study investigated the modified biochars for heavy metal removal from road runoff, finding that biochar prepared by manganese oxide impregnation showed excellent adsorption efficiency even under competitive conditions. The type of biochar and modification method significantly influenced the adsorption properties, with manganese and alkaline modifications causing substantial changes in surface area and functional groups.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2021)
Article
Multidisciplinary Sciences
Xun Xiao, Meixiang Wang, Shangshang Chen, Yihang Zhang, Hangyu Gu, Yehao Deng, Guang Yang, Chengbin Fei, Bo Chen, Yuze Lin, Michael D. Dickey, Jinsong Huang
Summary: This study presents an encapsulation strategy using lead-adsorbing ionogel to prevent lead leakage and improve stability for perovskite modules. The ionogel layers enhance impact resistance and pass accelerated stability tests. The encapsulation significantly reduces lead leakage even under extreme conditions, providing a promising solution for addressing lead toxicity and instability in perovskite solar cells.
Article
Environmental Sciences
Hainan Lu, Jiacheng Xu, Zhengjun Feng, Feng Li, Xinde Cao, Jie Yang
Summary: This study investigates the sorption capacity of modified biochar for nitrobenzene removal. Chemical modification enhances the sorption capacity of biochar pyrolyzed at high temperatures, while decreasing the sorption capacity of biochar pyrolyzed at low temperatures. NaOH and HCl modifications significantly improve the sorption capacity, while HNO3 modification decreases it.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Green & Sustainable Science & Technology
Tong Cai, Xiaoli Liu, Jiachao Zhang, Baiqing Tie, Ming Lei, Xiangdong Wei, Ou Peng, Huihui Du
Summary: Oiltea camellia shell biochar was prepared by pyrolysis in the presence of sodium silicate, which significantly enhanced its adsorption capacity for Cd removal. Silicate-modification increased the specific surface area of biochar and promoted the internal diffusion of Cd on biochar.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Chemistry, Physical
Justyna Bak, Peter Thomas, Dorota Kolodynska
Summary: In this study, chitosan-modified biochars were synthesized and applied for the efficient adsorption of Cu(II), Cd(II), Zn(II), Co(II), and Pb(II) ions from aqueous media. The materials exhibited a heterogeneous, well-developed surface and demonstrated good thermal stability. The sorption mechanism was determined by the presence of carboxyl, hydroxyl, and phenol functional groups. The optimal sorption conditions were determined by varying the sorbent dose, pH, contact time, initial concentration, and temperature. The sorbents could be regenerated with nitric acid, achieving a high yield. This study provides a cost-effective and high-performance method for water decontamination.
Article
Chemistry, Multidisciplinary
Federica Ferruti, Ievgen Pylypchuk, Luca Zoia, Heiko Lange, Marco Orlandi, Adrian Moreno, Mika H. H. Sipponen
Summary: Lignin nanoparticles (LNPs) were prepared by fractionation of lignin and subsequent recombination of selected fractions. LNPs with surface functionalization showed adhesive and alkaline stable properties, making them suitable for applications requiring stability under challenging pH conditions.
Article
Environmental Sciences
Ewelina Weidner, Grzegorz Wojcik, Dorota Kolodynska, Teofil Jesionowski, Filip Ciesielczyk
Summary: This study focuses on the fabrication of CTAB-and N,N-dimethyltetradecylamine-grafted zirconia and its ability to adsorb vanadium ions. The effectiveness of ZrO2 functionalization and the nature of the modifiers used were confirmed through differences in porosity, functional groups, and isoelectric points of the prepared adsorbents. The materials showed promising results for the removal of vanadium ions, with ZrO2-NH+ exhibiting the highest adsorption capacity.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Biochemistry & Molecular Biology
Dorota Kolodynska, Katarzyna Burdzy, Steffi Hunger, Andreas Aurich, Yongming Ju
Summary: This paper investigates the application of 'green' extractants, including citric acid (CA), metatartaric acid (TA), and ethylenediaminedisuccinic acid (EDDS), for the recovery of rare earth elements (REEs) from end-of-life products like nickel metal hydride batteries. The effects of phase contact time, initial concentration of CA, TA, EDDS, H2O2, pH, and temperature were considered. The addition of TA to the CA solution resulted in higher rates of metal ion binding and leaching. The optimal conditions were determined to be CA-TA and H2O2 concentrations of 0.6M-0.3M-2%.
Article
Chemistry, Physical
Urszula Ryszko, Piotr Rusek, Dorota Kolodynska
Summary: This study discusses the chemical and mineralogical compositions of phosphate rocks from various locations. These rocks have high phosphorus content, making them suitable for the production of phosphoric acid and fertilizers.
Article
Chemistry, Physical
Justyna Bak, Weronika Sofinska-Chmiel, Maria Gajewska, Paulina Malinowska, Dorota Kolodynska
Summary: This research evaluates the suitability of Dowex PSR2 and Dowex PSR3, strongly basic anion exchangers, as sorbents for nickel ions in aqueous solutions. Due to the increasing discharge of nickel into wastewaters, primarily from steel production, the search for new solutions is necessary. Nickel sorption experiments were conducted under static conditions, optimizing pH, contact time, concentration, and temperature. Kinetic, isothermal, and thermodynamic parameters were calculated, and the exchangers were characterized using spectroscopy and elemental analysis. The sorption process was found to be most effective at pH 6, after 240 minutes, and at 293K. Thermodynamic parameters indicated exothermic and spontaneous adsorption. Physicochemical analyses combined with experimental research enabled determination of the sorption mechanism of Ni(II) ions.
Article
Chemistry, Physical
Dominika Fila, Dorota Kolodynska
Summary: The paper investigated the adsorption of alginate-based adsorbents (ALG-based adsorbents) for La(III) ions' removal. Fixed-bed adsorption studies were carried out with different alginate-based adsorbents. The effects of inlet concentrations on breakthrough curves were studied and the best operational parameters were determined using different models. The ALG-based adsorbents showed high desorption efficiency for La(III) ions after passing through 100 cm(3) of 1 mol/dm(3) HCl. Overall, the results demonstrated the potential of ALG-based adsorbents as cost-effective and environmentally friendly materials for La(III) ion recovery.
Article
Engineering, Environmental
Katarzyna Burdzy, Yongming Ju, Dorota Kolodynska
Summary: The need for recycling used materials has become urgent due to environmental pollution and the depletion of many deposits. This paper presents a study on the use of a biodegradable complexing agent (IDHA) for the recovery of La(III), Nd(III), and Ho(III) through adsorption using different ion exchangers. The results show that Purolite S957 has the highest adsorption capacity for La(III) complexes, while Lewatit SP112 exhibits high efficiency in adsorbing Nd(III) and Ho(III) complexes.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Green & Sustainable Science & Technology
Lei Wang, Yuemei Tang, Yu Gong, Xiang Shao, Xiaochen Lin, Weili Xu, Yifan Zhu, Yongming Ju, Lili Shi, Dorota Kolodynska
Summary: This study investigates the remediation of heavy metals and high alkalinity in the washing solution of fly ash using simulated exhaust gases. The results show that under certain conditions, bubbling two kinds of simulated flue gases can efficiently remove 97.9-99.2% of Pb ions. The study provides a fundamental guide for remediating multiple pollutants in the washing solution of fly ash and reducing carbon emissions from power plants and industries.
Article
Engineering, Environmental
J. Bak, S. Gustaw, D. Kolodynska
Summary: This study synthesized novel hydroxyapatite modified biochars and conducted sorption-desorption studies and physicochemical analysis. The hydroxyapatite used for the modification was sourced from egg shells, boiler stone, chalk, and marl. The obtained sorbents showed satisfactory results in removing vanadium ions from aqueous solutions, with BCHAp1 (hydroxyapatite modified biochar from egg shells) achieving a qt of 27.45 mg/g (concentration 100 mg/L) under optimized sorption conditions of pH 3, time 240 min, and temperature 293 K. The sorption process was found to involve a complex, mixed mechanism of physical and chemical interactions, as revealed by the calculated ΔH, ΔS, and ΔG. Washing the sorbents with hydrochloric acid resulted in a desorption efficiency of nearly 80%.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Biochemistry & Molecular Biology
Grzegorz Janusz, Andrzej Mazur, Anna Pawlik, Dorota Kolodynska, Bogdan Jaroszewicz, Anna Marzec-Grzadziel, Piotr Koper
Summary: Deadwood plays a crucial role in forest ecology, and the degradation and carbon assimilation of deadwood are carried out by fungi and bacteria. This study investigated the abundance and distribution of microbial taxa in dead spruce logs and the soil below over a 50-year period. The results showed differences in microbial diversity and relative abundance between the samples from 1974 and 2014, with certain taxa being more predominant in each time period.
Article
Chemistry, Multidisciplinary
Ievgen. Pylypchuk, Maria Karlsson, Par A. Linden, Mikael. E. Lindstrom, Thomas Elder, Olena Sevastyanova, Martin Lawoko
Summary: Studies have found that the size of lignin nanoparticle (LNP) is determined by the molecular weight (M-w) of lignin. However, a deeper understanding of the role of molecular structure in LNP formation and its properties is needed to establish a solid foundation for structure-property relationships. This study demonstrates that, for lignins with similar M-w, the size and morphology of LNPs depend on the molecular structure of the lignin macromolecule. The molecular structure determines the molecular conformations, which in turn affect the inter-molecular assembly, resulting in differences in size and morphology between LNPs.
Article
Chemistry, Multidisciplinary
Unnimaya Thalakkale Veettil, Adrian Moreno, Alberto J. Huertas-Alonso, Mohammad Morsali, Ievgen V. Pylypchuk, Li-Yang Liu, Mika H. Sipponen
Summary: This study reports on the controlled esterification of softwood kraft lignin (SKL) for the production of scalable, solvent-free melt-spun microfibers. The incorporation of magnetite nanoparticles (MNPs) into lignin oleate fibers improves the thermal stability of the fibers. Adsorption of organic dyes, magnetic recovery, and recycling are achieved through melt spinning of regular and magnetic fibers.