Article
Engineering, Environmental
Panya Maneechakr, Surachai Karnjanakom
Summary: The study focused on the selective removal of Pb2+ ions from aqueous solutions using a magnetic adsorbent, CS-S-Fe-Mn, with good dispersion and magnetic properties. The adsorbent showed a high surface area, strong adsorption capacity, and conformed to rapid monolayer-physisorption and spontaneous-endothermic processes.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Environmental Sciences
Fande Meng, Yuwei Zhang, Yongbing Cai, Guodong Yuan, Feng X. Han
Summary: This study investigated the kinetic and thermodynamic features of Pb(II) adsorption onto a humic acid derived from leonardite. The results showed that Pb(II) adsorption followed a pseudo-second-order model and was exothermic and spontaneous. The leonardite-derived humic acid was found to be an excellent adsorbent for removing Pb(II) from aqueous solutions.
WATER AIR AND SOIL POLLUTION
(2021)
Article
Environmental Sciences
Aaron Albert Aryee, Farid Mzee Mpatani, Yangyang Du, Alexander Nti Kani, Evans Dovi, Runping Han, Zhaohui Li, Lingbo Qu
Summary: A novel adsorbent PN-Fe3O4-IDA was developed for the remediation of heavy metals in water, derived from the chemical modification of peanut husk using magnetic nanoparticles and iminodiacetic acid. The adsorbent showed mesoporous structure, functional groups enhancing adsorption capacities and magnetic properties for easy removal, exhibiting significant adsorption capacity for pollutants and potential for wastewater treatment processes.
ENVIRONMENTAL POLLUTION
(2021)
Article
Engineering, Environmental
Fernando Valenzuela, Geraldine Quintana, Alejandro Briso, Viviana Ide, Carlos Basualto, Jose Gaete, Gonzalo Montes
Summary: The study successfully prepared and characterized a solid adsorbent capable of simultaneous removal of cations and anions from wastewater, showing features of high efficiency, reproducibility, and chemical stability, achieving removal of heavy metal ions from aqueous solutions through ion exchange and chemical adsorption mechanisms.
JOURNAL OF WATER PROCESS ENGINEERING
(2021)
Article
Materials Science, Textiles
Collins U. Ibeji, Kovo G. Akpomie, Celestine Ugwu, Bright A. Agwogie, Segun A. Ogundare, James F. Amaku
Summary: This study tested the utilization of fibrous prunus dulcis seed shell powder and its phosphate-modified derivative for the removal of Pb2+. The modified adsorbent showed better Pb(II) uptake and several factors including temperature, time, pH, metal concentration, and material dosage affected the adsorption performance. The results demonstrated the potential of using these materials for the decontamination of Pb polluted water.
JOURNAL OF NATURAL FIBERS
(2022)
Article
Mining & Mineral Processing
Hongxia Li, Hongbing Ji, Xinglan Cui, Xiaokui Che, Qidong Zhang, Juan Zhong, Rongzhen Jin, Lei Wang, Yi Luo
Summary: The novel porous nanocomposite CPM exhibited efficient adsorption capacities for removing metalloid As(III) and heavy metals Cd(II), Cu(II), and Pb(II) from water and soil, with different adsorption mechanisms contributing to the overall effectiveness.
INTERNATIONAL JOURNAL OF MINING SCIENCE AND TECHNOLOGY
(2021)
Article
Polymer Science
Mohammad Azam, Saikh Mohammad Wabaidur, Mohammad Rizwan Khan, Saud I. Al-Resayes, Mohammad Shahidul Islam
Summary: In this study, cost-effective adsorbents based on ajwa date pits were prepared and used to remove Cu(II) ions from aqueous medium. The adsorbents showed high adsorption capacity for Cu(II) ions, and the majority of the metal could be recovered by acid elution from the saturated adsorbents. The results demonstrated that the adsorbents made from ajwa date pits could serve as an economical and environmentally friendly alternative for removing Cu(II) ion pollutant from water.
Article
Chemistry, Applied
Yu Zhang, Liang Zhang, Ruohui Gao, Lvling Zhong, Juanqin Xue
Summary: The polymer composite material PVA/BC/CaCO3 was developed for selective adsorption of toxic heavy metal ions such as Cd(II), Cu(II), and Pb(II) from solution. The adsorption kinetics data fit the pseudo-first-order kinetics model, while the thermodynamic adsorption data fit the Langmuir model. The maximum adsorption capacities for Cu(II), Pb(II), and Cd(II) were found to be 57.1, 513.6, and 238.6 mg/g, respectively, at 40 degrees C. This adsorbent also showed high recyclability, indicating its potential in removing heavy metal ions from contaminated solutions.
CARBOHYDRATE POLYMERS
(2021)
Article
Environmental Sciences
Jinxin Wang, Wenjie Zhang
Summary: The adsorption properties of Shanghai silty clay (SSC) towards heavy metal ions Cd(II), Pb(II), As(V), and Cr(VI) were investigated, revealing high sorption capacities and dominant adsorption on the clay surface. Langmuir model fits well for Cd(II) and Pb(II) while Freundlich model is suitable for As(V) and Cr(VI). Thermodynamic analysis shows spontaneous and endothermic adsorption of Cd(II) and Pb(II, while exothermic adsorption of As(V) and Cr(VI).
ENVIRONMENTAL MONITORING AND ASSESSMENT
(2021)
Article
Crystallography
Saad Melhi, Eid H. Alosaimi, Belal El-Gammal, Wafa A. Alshahrani, Yasser F. El-Aryan, Hamdan A. Al-Shamiri, Habib Elhouichet
Summary: The aim of this study was to develop a novel triphenylaniline-based porous organic polymer (TPABPOP-1) for efficient removal of Pb(II) from water. The TPABPOP-1 polymer was characterized using XPS, FTIR, SEM, TGA, and C-13 CP/MAS NMR analyses. The results showed that the TPABPOP-1 polymer had a BET surface area of 1290 m(2)/g. FTIR and XPS techniques confirmed the successful adsorption of Pb(II) onto TPABPOP-1.
Article
Biochemistry & Molecular Biology
Ali Hashem, Chukwunonso Onyeka Aniagor, Mohamed Fathi Nasr, Ashraf Abou-Okeil
Summary: The study compared the efficacy of treated sodium alginate (TSA) and activated carbon fibre (ACF) for aqueous Pb(II) uptake. Despite the significant difference in surface area, TSA with high carboxyl content outperformed ACF in adsorption performance. The findings emphasize the importance of surface functional groups in determining adsorptive performance.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2021)
Article
Polymer Science
Chao Hu, Zuhong Zheng, Mengyao Huang, Fan Yang, Xuewei Wu, Aiqun Zhang
Summary: This study analyzed a magnetite-chitosan composite through various techniques and explored its adsorption properties for Cu(II) and Cd(II). The results showed that the optimum pH for adsorption was 5.0, the equilibrium time was about 10 minutes, and the adsorption capacity reached 26.28 mg/g for Cu(II) and 18.67 mg/g for Cd(II). The temperature had a certain impact on the adsorption amount, and the composite material had a relatively rough outer surface, with dominant adsorption being attributed to chitosan. The research suggests the importance of further optimizing the composite system through green synthesis for heavy metal adsorption.
Article
Chemistry, Multidisciplinary
Hongjie Gao, Xiaomin Zhang, Bo He, Liang Zhang, Ke Wang, Jiaqian Liu, Bing Liu, Zhuang Wang, Jianxiang Ma
Summary: Industrial waste cenospheres (CSs) were transformed into cenospheres@carbon nanotubes (CSs@CNTs) for the adsorption of Pb(ii) ions. The 3D spherical network structure of CSs@CNTs prevented aggregation and ensured sufficient contact area, while the high density of surface defects on CNTs provided abundant adsorption sites. The adsorption process was studied in terms of pH, adsorption isotherms, kinetics, and thermodynamics. The results showed that CSs@CNTs had great potential in wastewater treatment and high value-added utilization of solid waste.
NEW JOURNAL OF CHEMISTRY
(2023)
Article
Green & Sustainable Science & Technology
Yan Yu, Jiangtao He, Jingyang Sun, Zixuan Pei, Qidong Wu, Rui Yu
Summary: China, as a large agricultural country, produces a significant amount of crop straw annually. Therefore, the development of cost-effective and economic application of invasive plants is necessary. Biochars derived from crop straw have shown promise as adsorbent materials, however, research comparing biochars derived from different types of crop straw under the same conditions is limited. This study characterized five different biochars and found that GBC exhibited higher adsorption capacities for heavy metals. The results highlight the importance of selecting and utilizing plant-based biochar for different heavy metals.
Article
Environmental Sciences
Rongying Zeng, Wenqing Tang, Qianyi Zhou, Xing Liu, Yan Liu, Shuzhan Wang, Zhen Chen, Nengzhong Yi, Zefen Wang, Jun Chen
Summary: Two novel adsorbents, CaAl-LDHs and SDBS-CaAl-LDHs, showed high adsorption capacities for lead ions. The adsorption kinetics and isotherms of both adsorbents were studied, indicating their potential application in water treatment.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Engineering, Chemical
Shrutee Lakshminarasimha, Abhinav Maurya, Govind Sharan Gupta, Gadi Venkat Arun Chaitanya
Summary: This study investigates the lateral flow of gas-powder through a packed bed to understand the behavior of powder in the presence of certain conditions, such as a cavity, protrusion, and decreasing gas condition. The experiments conducted in a two-dimensional slot-type packed bed successfully quantified the static and dynamic powder holdups under different conditions. The results show that the powder holdup increases with a decrease in gas velocity, an increase in powder size, and powder flux.
CANADIAN JOURNAL OF CHEMICAL ENGINEERING
(2023)
Article
Materials Science, Ceramics
Aditya Yadav, Anuj Sharma, Vishal Baloria, Preetam Singh, Govind Gupta
Summary: This study reports the growth of nanostructured tungsten oxide (WO3) thin film on SiO2 substrate under controlled oxidation conditions for NO sensing. The fabricated sensor demonstrates high selectivity, stability, and faster response/recovery time, with an ultra-high response for 1 ppm NO concentration at 250 degrees C. The ultra-high response is attributed to the high specific surface area and effective gas diffusion ability of the sensor.
CERAMICS INTERNATIONAL
(2023)
Article
Nanoscience & Nanotechnology
Shivani Sharma, Rajan Saini, Govind Gupta, Dattatray J. Late
Summary: In this study, a room temperature NH3 gas sensor device made from WS2 nanosheets obtained via probe sonication method was reported. The device exhibited excellent sensitivity, faster response, and recovery time compared to previous studies. The study highlights the potential use of two-dimensional nanosheets in sensing devices.
Article
Materials Science, Multidisciplinary
Mohd Gulfam Alam, Mohammed Danish, Abdulaziz M. Alanazi, Tanweer Ahmad, H. P. S. Abdul Khalil
Summary: This study investigated the efficiency of phenol removal and adsorption capacity of high-quality Acacia mangium wood activated carbon (AMW-AC) prepared from H3PO4 activation. The results showed that the percentage of phenol removal and adsorption capacity of AMW-AC were significantly influenced by solution temperature, contact time, initial phenol concentration, and solution pH. The optimal conditions for maximum phenol removal (73%) and highest adsorption capacity (53.8 mg/g) were determined as 25 degrees C solution temperature, 138 min contact time, 150 ppm initial phenol concentration, and solution pH 3.0. The study demonstrated the potential of Acacia mangium wood waste as an efficient adsorbent for phenol removal from wastewater through chemical activation with phosphoric acid.
DIAMOND AND RELATED MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Radhe Shyam, Deepak Negi, Komal Shekhawat, Fouran Singh, Devarani Devi, Pargam Vashishtha, Govind Gupta, Subingya Pandey, Pamu Dobbidi, Srinivasa Rao Nelamarri
Summary: The present study demonstrates the tuning of structural, topography, and luminescence properties of 30 keV Li-ion implanted (K, Na)NbO3 thin films synthesized using RF sputtering. The results show that the crystallinity and morphology of the films are affected by Li-ion implantation, with a decrease in crystallinity and a change in the morphology. The transmittance of the films is minimally improved, while the optical band gap and the relative PL intensity in the ultraviolet region are increased with the ion fluence. The carrier lifetime is also increased after ion implantation.
RESULTS IN PHYSICS
(2023)
Article
Biochemistry & Molecular Biology
Kavita Pusphanathan, Hafiza Shukor, Noor Fazliani Shoparwe, Muaz Mohd Zaini Makhtar, Nor' Izzah Zainuddin, Nora Jullok, Masoom Raza Siddiqui, Mahboob Alam, Mohd Rafatullah
Summary: By incorporating titanium dioxide (TiO2) and polyethylene glycol (PEG) additives into polysulfone (PSf) polymer via the non-solvent-induced phase-inversion (NIPS) method, the performance of PSf mixed matrix membranes (MMMs) was improved for the removal of acetic acid.
Article
Engineering, Electrical & Electronic
Pargam Vashishtha, Pukhraj Prajapat, Anuj Sharma, Preetam Singh, Sumeet Walia, Govind Gupta
Summary: This study introduces a unique coco palm-like MoS2/GaN heterojunction-based self-powered photodetector that operates in the broadband spectral range and exhibits high responsivity at both room temperature and high operating temperatures. The device also has low-light detection abilities and opens up possibilities for monitoring optical radiations in various industrial processes.
ACS APPLIED ELECTRONIC MATERIALS
(2023)
Article
Engineering, Electrical & Electronic
Deependra Kumar Singh, Pukhraj Prajapat, Jyoti Saroha, Rohit Kumar Pant, Shailesh Narain Sharma, Karuna Kar Nanda, Saluru Baba Krupanidhi, Govind Gupta
Summary: The photodetection properties of a-GaN nanorods-based photodetector and the effect of decorating silver nanoparticles are investigated. The original a-GaN detector exhibits negative photoconductivity, attributed to defect states in GaN nanorods. Introduction of nanoparticles reverses the photocurrent polarity, leading to a significant enhancement in the photoresponsivity due to the passivation of surface defect states and reduced dark current.
ACS APPLIED ELECTRONIC MATERIALS
(2023)
Article
Biotechnology & Applied Microbiology
Ogechukwu Bose Chukwuma, Mohd Rafatullah, Riti Thapar Kapoor, Husnul Azan Tajarudin, Norli Ismail, Masoom Raza Siddiqui, Mahboob Alam
Summary: The utilization of lignocellulose biomass for renewable energy production through green technology is important for sustainable development goals. In this study, lignocellulolytic bacteria were isolated and characterized from municipal solid waste sediments of a landfill site in Malaysia. Promising bacteria capable of expressing lignocellulolytic enzymes and degrading lignocellulosic biomass were identified.
FERMENTATION-BASEL
(2023)
Article
Green & Sustainable Science & Technology
Riti Thapar Kapoor, Mohd Rafatullah, Husnul Azan Tajarudin, Masoom Raza Siddiqui, Mahboob Alam
Summary: Discharging wastewater into aquatic systems poses a severe threat to the ecosystem. This study demonstrates the significant capacity of date fruit seed biochar (DFSB) for removing Direct Red 28 (DR28) dye from aqueous solutions. DFSB proves to be an environmentally benign and sustainable adsorbent for wastewater treatment and waste management, contributing to a sustainable future.
Article
Green & Sustainable Science & Technology
Muhammad Qasim, Muhammad Ayoub, Karamjit Singh, Abrar Inayat, Rashid Shamsuddin, Mohammed Danish, Sarah Farrukh
Summary: This study compared three types of catalysts and found that the waste-derived CaO-implemented Ni-based catalyst demonstrated the highest sorption capacity in sorption-enhanced steam reforming (SESR), making it a promising catalyst for the process with potential cost savings.
Article
Chemistry, Physical
Pargam Vashishtha, Pukhraj Prajapat, Kapil Kumar, Mahesh Kumar, Sumeet Walia, Govind Gupta
Summary: The Sb2Se3/GaN heterostructure photodetector demonstrates excellent photoresponsivity and thermal stability, enabling it to detect optical radiation across a broad spectrum.
SURFACES AND INTERFACES
(2023)
Article
Materials Science, Multidisciplinary
Vishnu Aggarwal, Sudhanshu Gautam, Aditya Yadav, Rahul Kumar, Bipul Kumar Pradhan, Brajesh S. Yadav, Govind Gupta, Senthil Kumar Muthusamy, Sumeet Walia, Sunil Singh Kushvaha
Summary: Recently, there has been a great demand for highly responsive photodetectors that can detect a wide range of wavelengths. Researchers have successfully fabricated a broadband metal-semiconductor-metal photodetector by integrating sputtered Bi2Se3 with laser molecular beam epitaxy grown GaN film. This photodetector shows high responsivity in both the ultraviolet and near-infrared regions.
MATERIALS RESEARCH BULLETIN
(2024)
Article
Materials Science, Multidisciplinary
Ankita Rawat, Nitesh K. Chourasia, Saurabh K. Saini, Gaurav Rajput, Aditya Yadav, Ritesh Kumar Chourasia, Govind Gupta, P. K. Kulriya
Summary: The rapid advancement of nanomaterials has paved the way for technological breakthroughs. MXenes have gained attention due to their unique properties. This study validates the synthesis of MXene and investigates the influence of centrifugation speed on its structure and optical properties.
MATERIALS ADVANCES
(2023)
Article
Optics
Pargam Vashishtha, Ajit Dash, Kapil Kumar, Pukhraj Prajapat, Mahesh Kumar, Sumeet Walia, Govind Gupta
Summary: This study presents a high-performance photodetector based on antimony selenide, which exhibits fast and high response as well as thermal stability across a wide range of wavelengths. The findings provide insights for designing high thermal stability detectors and promoting the use of such materials in photodetector applications.
OPTICS AND LASER TECHNOLOGY
(2024)
