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Abdulrahman Al Saud

Bio: Abdulrahman Al Saud is an academic researcher. The author has contributed to research in topics: Activated carbon. The author has an hindex of 1, co-authored 1 publications receiving 1 citations.

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Proceedings ArticleDOI
07 Mar 2023
TL;DR: In this paper , an off-grid energy Wi-Fi mesh system for remote areas is proposed, and the system is self-powered, and to ensure 24 hours energy production, a hybrid solution of vertical wind turbine and the solar cell is used.
Abstract: To transmit information from a source to a destination without interruption from electromagnetic interference, a strong wireless network connection is required. These wireless networks may be powered by direct current from a battery or a direct source. The challenge arises when a wireless network is installed at a remote location. In this paper, an off-grid energy Wi-Fi mesh system for remote areas is proposed. The system is self-powered, and to ensure 24 hours energy production, a hybrid solution of vertical wind turbine and the solar cell is used. Dedicated routers are designed using Raspberry Pi, and other supporting electronic circuitry and results are analyzed. To avoid bandwidth issues, the network offloading concept is exploited using a novel concept of power used by each node. The proposed system is portable and suitable for remote areas where grid-connected energy availability is an issue.

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Journal ArticleDOI
TL;DR: In this article, the polyurethane foam was presented as a porous bed on which the optimum amount of polyaniline nanoparticles was coated, and the performance of the prepared adsorbent was investigated for Hg (II) removal from polluted water in batch and continuous experimentation.
Abstract: In this study, the polyurethane foam was presented as a porous bed on which the optimum amount of polyaniline nanoparticles was coated. The performance of the prepared adsorbent was investigated for Hg (II) removal from polluted water in batch and continuous experimentation. The effect of total dissolved solids (TDS) on the adsorption capacity was negligible; as a consequence, the adsorbent is applicable in cases that the TDS is an unavoidable feature of the contaminated water. The maximum removal efficiency of 97.4% was acquired at 5 mg L–1 for Hg (II) concentration, pH: 7, and the adsorption time of 60 min. Kinetic studies were accomplished at different pH, temperatures, and Hg (II) concentrations. The results showed that by increasing the Hg (II) concentration from 5 to 60 mg L−1, the second-order rate constant declined from 1.03 to 0.06 g mg–1 min– 1, whereas the diffusion rate constant increased from 0.09 to 1.09 mg g–1 min– 1/2. However, an opsite trend was observed by increasing the temperature. However, pH showed no significant effect on the rate constants. The maximum adsorption capacity obtained by the Langmuir isotherm (r2 = 0.9846) was 103.2 mg/g polyaniline. Adsorbent regeneration was successfully performed up to five cycles using HCl 0.1 mol L−1, and the adsorption capacity decreased from 14.5 to 10 mg g−1, showing 30% decrease in the adsorption capacity after the fifth cycle. In column experiments, the service volume, an economic parameter in column operation, diminished as the flow rate increased.

18 citations