Article
Chemistry, Multidisciplinary
Feifei Chen, Qin Wang, Linzhou Zhang, Qiushi Zhu
Summary: This study aims to investigate the interaction between functionalized graphene and metal porphyrins for a better understanding of the influence of N and O heteroatoms in asphaltene on demetallization efficiency during the solvent deasphalting process. The results show that the aminated/carboxylated side group has a strong inhibitory effect on the chemical adsorption of metal porphyrins.
Article
Engineering, Multidisciplinary
Sajjad Ansari, Hamid Bahmaninia, Mohammad-Reza Mohammadi, Mehdi Ostadhassan, Saeid Norouzi-Apourvari, Mahin Schaffie, Mohammad Ranjbar, Abdolhossein Hemmati-Sarapardeh
Summary: This study investigated the controlling factors on the adsorption of different types of asphaltene on the surface of dolomite and found that the total nitrogen and sulfur content and the aromaticity of the asphaltenes had a significant impact on adsorption. In dynamic experiments, an increase in flow rate led to a decrease in asphaltene adsorption. The findings of this study are important for better management of oil production from dolomitic reservoirs.
ALEXANDRIA ENGINEERING JOURNAL
(2022)
Article
Geochemistry & Geophysics
Derek R. Parks, Xiao-Lei Liu
Summary: Abundant vanadyl and nickel porphyrins were found in the Woodford formation shales, indicating their distribution is influenced by redox conditions and metal availability. The collapse of anoxia conditions in the later Upper Woodford led to a decrease in vanadyl/nickel ratio. The selective binding of metal species to specific porphyrin structures determines the relative abundance of vanadyl and nickel porphyrins.
ORGANIC GEOCHEMISTRY
(2023)
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
Energy & Fuels
Hamid Bahmaninia, Sajjad Ansari, Mohammad-Reza Mohammadi, Saeid Norouzi-Apourvari, Abdolhossein Hemmati-Sarapardeh, Mahin Schaffie, Mohammad Ranjbar
Summary: The nature of asphaltene and mineralogy of reservoir rock affect the adsorption of asphaltene onto the rock surface. The adsorption amount of asphaltenes on the quartz surface is directly related to the nitrogen content and polarity of asphaltene. Increasing flow rate in the dynamic adsorption process can reduce asphaltene uptake by quartz, indicating the physical nature of asphaltene adsorption on quartz. The competitive presence of water with asphaltene for the surface-active sites affects asphaltene uptake by quartz in the three-phase system compared to the two-phase system.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2021)
Article
Chemistry, Physical
Weijun Dou, Junsheng Liu, Meng Li
Summary: The study synthesized graphene oxide-based hybrid membranes and characterized their performance properties, particularly focusing on the competitive adsorption of Cu2+ in mixed multi-metal solution. The results showed that the hybrid membranes exhibited good selectivity and adsorption efficiency for metal ions, suggesting potential applications in metal separation and recycle.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Chemistry, Physical
Ke Li, Qian Li, Yan Zhang, Yongbin Yang, Tao Jiang
Summary: Thiourea leaching is a promising alternative to cyanidation for gold recovery. This study investigated the effect of metal ions on gold adsorption onto activated carbon from acidic thiourea solution. Metal ions such as Cu2+, Ag+, Pb2+, and Zn2+ interfered with gold adsorption, with Cu2+ and Ag+ having the greatest impact. Metal ions also adsorbed onto activated carbon, with their adsorption capacity following the order of Cu2+ > Ag+ > Pb2+ > Zn2+. The decrease in active sites on activated carbon occupied by metal ions resulted in a decrease in gold adsorption.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Chemistry, Multidisciplinary
Tao Song, Qinglong Luo, Fengfeng Gao, Bing Zhao, Xiaogang Hao, Zhong Liu
Summary: This paper investigates the use of nickel hydroxide for boron removal from aqueous resources through electro-assisted and conventional adsorption methods. The adsorption conditions of nickel hydroxide for boron are mild (pH: 7-9), and the synergistic effect of physical and chemical adsorption is enhanced under the electric field. The electro-assisted method shows faster equilibrium time and higher adsorption capacity compared to conventional adsorption. Additionally, nickel hydroxide exhibits selectivity in high-concentration anion solutions and can be easily regenerated by an alkaline solution. Therefore, nickel hydroxide with the electro-assisted method holds potential for efficient and eco-friendly boron removal.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2023)
Article
Chemistry, Physical
Kirill Gurdumov, Ursula Mazur, K. W. Hipps
Summary: The growth, dynamics, and stability of a model noncovalent self-assembler, Co(II) octaethylporphyrin, at the solution-HOPG interface were investigated via real-time imaging, scanning tunneling microscopy, and computational methods. The choice of organic solvent was found to play a crucial role in the kinetics and structure of the self-assembled monolayers.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Materials Science, Multidisciplinary
Yong Jia, Jia Ni, Pei-Yun Wu, Fang Fang, Yong-Xing Zhang
Summary: Micro/nanostructured nickel carbonate hydroxide microspheres were successfully synthesized and then calcined into NiO microspheres. The adsorption properties of NiO microspheres towards Congo red were well fitted by the Langmuir model, with kinetic experiment results described by the pseudo-second-order model. The thermodynamic parameters revealed that the adsorption process of Congo red on NiO microspheres was feasible, spontaneous, and endothermic.
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
(2021)
Article
Energy & Fuels
Xuechun Ding, Shengchao Wei, He Bian, Lijun Zhu, Daohong Xia
Summary: This study investigates the influence of porphyrins on asphaltene aggregation and provides new insights into the mechanisms of porphyrins promoting the aggregation of asphaltene, deepening the understanding of asphaltene aggregation in oil fields.
Article
Environmental Sciences
Wei-Hong Lin, Jeff Kuo, Shang-Lien Lo
Summary: The study found that exposure to a Xenon lamp increased the oxygen content of PP pellets and led to changes in the characteristic peaks of the FTIR pattern, indicating initiation of oxidation. The adsorption capacities of the PP pellets after 28 days of exposure to the Xenon lamp were significantly higher than that of the raw PP pellets, posing an increased potential risk to aquatic species. The adsorption behavior can be described by a pseudo-second-order model with specific rate constants, demonstrating the impact of exposure to the Xenon lamp on microplastic pollutants in natural waters.
Article
Engineering, Chemical
Shagufta Zafar, Muhammad Imran Khan, Abdallah Shanableh, Saleem Ahmad, Suryyia Manzoor, Shabnam Shahida, Prasert Prapamonthon, Sidra Mubeen, Aziz Ur Rehman
Summary: This study investigated the adsorption of metal ions onto rice husk, analyzing characteristics such as morphological changes, operational parameters, isotherm models, kinetics, and thermodynamics. The results showed that the adsorption process was spontaneous, with different metal ions displaying varying affinities for Langmuir and Freundlich isotherm models. Adsorption on rice husk was found to follow a pseudo-second-order model, with an endothermic process for the metal ions.
DESALINATION AND WATER TREATMENT
(2021)
Article
Chemistry, Physical
Lizhi Wang, Junlong Liu, Jiajia Wang, Du Zhang, Jianhan Huang
Summary: This paper focuses on the development of novel sulf-functionalized porous organic polymers (POPs) for Mercury (II) (Hg2+) removal, which have high adsorption capacity, stability, and efficiency. The researchers constructed porphyrin-based POPs with different heteroatoms through a specific method, incorporating nitrogen (N) and sulfur (S) into the backbone structure of the polymers. The functional structures not only provide stable cross-linking and framework, but also offer abundant uncovered functional sites for Hg2+ adsorption, resulting in high Hg2+ capacity, removal efficiency, reusability, and selectivity.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2024)
Article
Polymer Science
Alejandro Onchi, Carlos Corona-Garcia, Arlette A. Santiago, Mohamed Abatal, Tania E. Soto, Ismeli Alfonso, Joel Vargas
Summary: This study investigates the ability of thiol-functionalized polymers derived from norbornene dicarboximides to remove heavy metals from aqueous systems. The results demonstrate that these polymers exhibit excellent adsorption performance for heavy metal ions, making them effective candidates for water purification.
