Search

Your search keyword '"Al‐Lohedan, Hamad A."' showing total 1,289 results
Start Over Author "Al‐Lohedan, Hamad A."
1,289 results on '"Al‐Lohedan, Hamad A."'

20. Nanoporous carbon@CoFe2O4 nanocomposite as a green absorbent for the adsorptive removal of Hg(ii) from aqueous solutions

Author

Abubakar Lawal, Yusof Nor Azah, Abdullah Abdul Halim, Wahid Mohd Hanif, Abd Rahman Siti Fatimah, Mohammad Faruq, Al-Lohedan Hamad A., and Soleiman Ahmed A.

Subjects
nanoporous carbon, cofe2o3, magnetite nanoparticles, hg(ii) adsorption, thermodynamics, wastewater treatment, Chemistry, QD1-999
Abstract

To address the harmful pollutants found in heavy metals and agricultural waste, researchers have worked on creating various materials that can capture these pollutants. They have experimented with altering the shape, size, structure, surface properties, and bioactive components of these materials. This study aims to improve the effectiveness of materials used for adsorption, focusing on the combination of cobalt spinal ferrite (CoFe2O4) and nanoporous carbon (NC) obtained from discarded palm kernel shells with the aim of Hg(ii) removal. The composite formed by the hydrothermal method was characterized thoroughly with morphological, structural, functional, pore sizes, thermal analysis, and magnetization analysis. Adsorption experiments were conducted under optimal conditions with a mass of 0.3 g, a concentration of 30 mg·L−1 of Hg(ii), and a pH of 3. The aim was to adsorb Hg(ii) ions from aqueous solutions. The analysis of kinetic studies using the Freundlich model revealed that it provided the most accurate fit for the adsorption isotherm. This model indicated a maximum Hg(ii) adsorption efficiency of 232.56 mg·g−1. Additionally, the thermodynamic measurements indicate that the adsorption is a spontaneous, favorable, and endothermic process. Likewise, we assessed how well the NC@CoFe2O4 nanocomposite could absorb Hg(ii) ions in actual condensate samples from the oil and gas industry. The results demonstrated a 93% recovery rate for Hg(ii) ions in wastewater. According to the findings, the NC@CoFe2O4 nanocomposite synthesized appears to be a strong contender for wastewater treatment and, at the same time, the prepared nanocomposite’s effectiveness, affordability, and non-toxic nature support the potential applications.

Published
2023
Full Text
View/download PDF

21. Green fabrication of chitosan from marine crustaceans and mushroom waste: Toward sustainable resource utilization

Author

Periyannan Kiruthiga, Selvaraj Hemamala, Subbu Balachandar, Pallikondaperumal Muthukrishnan, Karuppiah Ponmurugan, Rajabathar Jothi Ramalingam, Al-Lohedan Hamad, and Thangarasu Sadhasivam

Subjects
chitin, chitosan, demineralization, deproteination, deacetylation, Chemistry, QD1-999
Abstract

The exoskeletons of crabs, shrimp, and fish are major waste. These wastes contain chitin, an abundant natural polymer found next to cellulose. Thus, disposal of this waste becomes a huge problem for the environment; besides this, reutilization boosts the circular economy. Chitin is partially deacetylated to yield the economically useful product of chitosan and is a heteropolymer. The current study isolated chitosan from mushrooms and various marine crustaceans, i.e., crabs, shrimp, and fish. Chitosan was extracted from marine crustaceans by demineralization, deproteination, and deacetylation. Later, extracted chitosan was characterized by physicochemical characteristics like deacetylation degree, ash content, protein, color, fat-binding capacity (FBC), water-binding capacity (WBC), pH, and moisture content. The result showed that chitosan yield ranges from 13.0% to 17.0%, the degree of deacetylation range from 82.0% to 85.0%, ash content range from 0.8% to 3.0%, and protein content is below 1.0%. The FBC and WBC range between 320% and 444% and 535% and 602%, respectively. The pH and moisture content range from 7.4 to 8.0 and from 2.0% to 4.0%, respectively. Overall, results specified that crustacean waste was an exceptional chitosan source with availability and production consistency.

Published
2023
Full Text
View/download PDF

48. Effect of different exfoliation routes on the properties of chicken feather and elephant grass hybrid biochar

Author

Ezzat, Abdelrahman O., primary, Iwuozor, Kingsley O., additional, Al‐Dhayan, Dhaifallah, additional, Al‐Lohedan, Hamad A., additional, Micheal, Kehinde Temitope, additional, Emenike, Ebuka Chizitere, additional, Ogundana, Motunrayo R., additional, Micheal, Taiwo Temitayo, additional, Oyekunle, Ifeoluwa Peter, additional, Al‐Tilasi, Hissah H., additional, and Adeniyi, Adewale George, additional

Published
2024
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results