Secondary particle size determining sedimentation and adsorption kinetics of titanate-based materials for ammonia nitrogen and methylene blue removal

Zhang, Wenlong; Huo, Changjiang; Hou, Bo; Lin, Changzheng; Yan, Xuanye; Feng, Jiangtao; Yan, Wei

doi:10.1016/j.molliq.2021.117026

Cited by 11 publications

(5 citation statements)

References 51 publications

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“…The breakdown of dye was found to occur faster in basic conditions. [52] Therefore, photodegradation experiments were conducted in an alkaline medium using 0.3 M NaOH solution as the supporting electrolyte. The voltammogram of the MB was recorded under optimized conditions by employing a modified electrode under direct sunlight.…”

Section: Degradation Study Of Mb On the Designed Electrochemical Sensormentioning

confidence: 99%

A Novel Electrochemical Sensing Platform for the Sensitive Detection and Degradation Monitoring of Methylene Blue

et al. 2022

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Methylene blue is a toxic dye that is extensively used as a colorant in textile industries. Industrial effluent containing methylene blue, when drained into water bodies without proper treatment, poses a serious threat to aquatic and human lives. In order to protect the biocycle, various methods have been established to detect and remove hazardous dyes from aqueous systems. Electrochemical methods are preferred, owing to their characteristic features of simplicity, portability, potential selectivity, cost effectiveness, and rapid responsiveness. Based on these considerations, an electrochemical sensor consisting of amino-group-functionalized, multi-walled carbon nanotubes (NH2-fMWCNTs) immobilized on a glassy carbon electrode (GCE) was developed for the sensitive detection of methylene blue in aqueous solutions. The performance of the designed sensor was analyzed by electrochemical impedance spectroscopy, cyclic voltammetry, and square wave voltammetry. The developed sensing tool demonstrated promising features of sensitivity, selectivity, stability, fast responsiveness, and the ability to work with a very small volume of the analyte, i.e., in microliters, for analysis. Amino groups rich in electrons provide a negative charge to multi-walled carbon nanotubes, which significantly enhances the electrocatalytic activity of NH2-fMWCNTs for cationic dyes such as methylene blue. Using the designed sensing platform, a linear calibration plot with a limit of detection of 0.21 nM was obtained for methylene blue under optimized conditions. The designed sensor was also employed to monitor the extent and kinetics of the degradation of methylene blue. Titania nanoparticles were used for photocatalytic degradation, and the kinetics of degradation was monitored by both UV-Visible spectroscopic and electrochemical methods. The results revealed more than 95% removal of methylene blue in a time span of just 30 min.

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Section: Degradation Study Of Mb On the Designed Electrochemical Sensormentioning

confidence: 99%

A Novel Electrochemical Sensing Platform for the Sensitive Detection and Degradation Monitoring of Methylene Blue

et al. 2022

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“…Obviously, the fitting curve did not pass through the origin, and the intra-particle diffusion was not the only rate-limiting process, indicating that the adsorption process was affected by the joint control at other adsorption stages. 51–53 The fitting curve had a good linear correlation, and the adsorption process was greatly influenced by the boundary layer ( x i = 245.02), indicating that the adsorption process was influenced by the diffusion step rate. According to the above discussion, the adsorption process could be divided into four stages: in the first and second stages, Cu 2+ overcame the resistance of the water film and liquid film to diffuse to the outer surface of PAN–DETA; the third stage was the diffusion of Cu 2+ from the exterior to the interior of PAN–DETA; the fourth stage was the adsorption reaction of Cu 2+ on the internal adsorption sites.…”

Section: Resultsmentioning

confidence: 98%

Efficient removal of high- or low-concentration copper ions using diethylenetriamine-grafted electrospun polyacrylonitrile fibers

et al. 2023

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“…Other parameters shown to significantly affect the treatment process are pH, adsorbent dosage, and contact time. Other examples of alternative materials used as adsorbents include titanate-based adsorbent [109,110], ceramsite sand [32], and ceramic [17,106], among others.…”

Section: Adsorption and Ion Exchangementioning

confidence: 99%

Advances in Nitrogen-Rich Wastewater Treatment: A Comprehensive Review of Modern Technologies

Omar,

Almomani,

Qiblawey

et al. 2024

Sustainability

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Nitrogen-rich wastewater is a major environmental issue that requires proper treatment before disposal. This comprehensive overview covers biological, physical, and chemical nitrogen removal methods. Simultaneous nitrification–denitrification (SND) is most effective in saline water when utilizing both aerobic and anoxic conditions with diverse microbial populations for nitrogen removal. Coupling anammox with denitrification could increase removal rates and reduce energy demand. Suspended growth bioreactors effectively treated diverse COD/N ratios and demonstrated resilience to low C/N ratios. Moving biofilm bioreactors exhibit reduced mortality rates, enhanced sludge–liquid separation, increased treatment efficiency, and stronger biological structures. SND studies show ≥90% total nitrogen removal efficiency (%RETN) in diverse setups, with Defluviicoccus, Nitrosomonas, and Nitrospira as the main microbial communities, while anammox–denitrification achieved a %RETN of 77%. Systems using polyvinyl alcohol/sodium alginate as a growth medium showed a %RETN ≥ 75%. Air-lift reflux configurations exhibited high %RETN and %RENH4, reducing costs and minimizing sludge formation. Microwave pretreatment and high-frequency electric fields could be used to improve the %RENH4. Adsorption/ion exchange, membrane distillation, ultrafiltration, and nanofiltration exhibit promise in industrial wastewater treatment. AOPs and sulfate-based oxidants effectively eliminate nitrogen compounds from industrial wastewater. Tailoring proposed treatments for cost-effective nitrogen removal, optimizing microbial interactions, and analyzing the techno-economics of emerging technologies are crucial.

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Secondary particle size determining sedimentation and adsorption kinetics of titanate-based materials for ammonia nitrogen and methylene blue removal

Cited by 11 publications

References 51 publications

A Novel Electrochemical Sensing Platform for the Sensitive Detection and Degradation Monitoring of Methylene Blue

A Novel Electrochemical Sensing Platform for the Sensitive Detection and Degradation Monitoring of Methylene Blue

Efficient removal of high- or low-concentration copper ions using diethylenetriamine-grafted electrospun polyacrylonitrile fibers

Advances in Nitrogen-Rich Wastewater Treatment: A Comprehensive Review of Modern Technologies

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