Surface modification of phosphoric acid activated carbon by using non-thermal plasma for enhancement of Cu(II) adsorption from aqueous solutions

Wu, Long; Wan, Wenjie; Shang, Zhongsheng; Gao, Xinyuan; Kobayashi, Noriyuki; Luo, Guangqian; Li, Zhanyong

doi:10.1016/j.seppur.2018.01.007

Cited by 81 publications

(26 citation statements)

References 51 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, the husks or chaffs left after threshing the seeds ( Figure 1c) are often considered as waste. Moreover, numerous studies have reported that adsorbent capacity on metal ions could be boosted by treating it with phosphoric acid (H3PO4), sodium hydroxide (NaOH) and urea (CH4N2O) among others [11][12][13]. Hence, it is important to investigate the efficacy of using the modified form of this abundant byproduct of Citrullus colocynthis, in adsorbing Pb 2+ and Cd 2+ in tannery effluents, which have been reported to have high concentrations of the said metals [3].…”

Section: Materials and Methods Preparation And Modification Of Adsorbentmentioning

confidence: 99%

Adsorption Isotherms and Kinetics of Lead and Cadmium Ions: Comparative Studies Using Modified Melon (Citrullus colocynthis) Husk

Ogbozige

Toko

2020

IJEE

View full text Add to dashboard Cite

Section: Materials and Methods Preparation And Modification Of Adsorbentmentioning

confidence: 99%

Adsorption Isotherms and Kinetics of Lead and Cadmium Ions: Comparative Studies Using Modified Melon (Citrullus colocynthis) Husk

Ogbozige

Toko

2020

IJEE

View full text Add to dashboard Cite

“…Thus, we may conclude that this band is more likely attributed to the presence of phosphorus: the peaks located at 1120 and 1050 cm –1 can be assigned to P + –O – in acid phosphate esters and to symmetrical vibration in a P–O–P chain. 93 − 95 The peak at 980 cm –1 for the AC produced at a temperature higher than 750 °C is attributed to P–O–P stretching 31 due to the increased percentage of phosphorus after activation. The biochar and AC produced at 750 °C do not show this peak, possibly because of the lower phosphorus concentration, as revealed by ICP-OES results.…”

Section: Resultsmentioning

confidence: 99%

A Promising Solution for Food Waste: Preparing Activated Carbons for Phenol Removal from Water Streams

et al. 2021

View full text Add to dashboard Cite

Phenol and its derivatives are highly toxic chemicals and are widely used in various industrial applications. Therefore, the industrial wastewater streams must be treated to lower the concentration of phenol before discharge. At the same time, food waste has been a major environmental problem globally and the scientific community is eagerly seeking effective management solutions. The objective of this study was to understand the potential of utilizing food waste as a renewable and sustainable resource for the production of activated carbons for the removal of phenol from water streams. The food waste was pyrolyzed and physically activated by steam. The pyrolysis and activation conditions were optimized to obtain activated carbons with high surface area. The activated carbon with the highest surface area, 745 m 2 g –1 , was derived via activation at 950 °C for 1 h. A detailed characterization of the physicochemical and morphological properties of the activated carbons derived from food waste was performed and a comprehensive adsorption study was conducted to investigate the potential of using the activated carbons for phenol removal from water streams. The effects of pH, contact time, and initial concentration of phenol in water were studied and adsorption models were applied to experimental data to interpret the adsorption process. A remarkable phenol adsorption capacity of 568 mg g –1 was achieved. The results indicated that the pseudo-second-order kinetic model was better over the pseudo-second-order kinetic model to describe the kinetics of adsorption. The intraparticle diffusion model showed multiple regions, suggesting that the intraparticle diffusion was not the sole rate-controlling step of adsorption. The Langmuir isotherm model was the best model out of Freundlich, Temkin, and Dubinin–Radushkevich models to describe the phenol adsorption on activated carbons derived from food waste. This study demonstrated that food waste could be utilized to produce activated carbon and it showed promising capacity on phenol removal.

show abstract

“…Contrary, the q e dramatically decreased with increasing the nanofiber mat dosage (Fig. 5b), possibly due to availability of large number of adsorption sites which cause unsaturation of some of these sites throughout the adsorption process [26,27]. Two more investigations can be extracted from Fig.…”

Section: Adsorption Study Effect Of Solution Phmentioning

confidence: 97%

“…4 and 5, respectively) were used. The pseudo-first-order model assumes that the external diffusion mass transfer is the ratelimiting step [26] while the pseudo-second-order model supposes that chemisorption at adsorption sites rules the adsorption process [27,28].…”

Section: Effects Of Different Conditions On Mb Adsorptionmentioning

confidence: 99%

Fabrication, characterization, and dye adsorption capability of recycled modified polyamide nanofibers

et al. 2018

View full text Add to dashboard Cite

U TILIZATION of electrospinning technique accompanied by chemical modification as well as, the production of low-cost adsorbent based on polyamide nanofibers is the aim of our current work. The electrospinning parameters (polymer conc, applied voltage, and collector distance) have been studied. The obtained polyamide nanofiber mats were modified with citric acid at various conditions (concentration, temperature and catalyst concentration). The optimum conditions of this modification were investigated by MB uptake efficiency. The obtained data illustrate a positive relationship between citric acid concentration and MB uptake using the modified polyamide nanofiber. The produced adsorbent was well characterized using SEM, ATR-FTIR, and surface area measurement. Scanning Electron Microscopy clarifies minor swelling of nanofibers during the modification process which attributed to the increase in fiber diameter and therefore reduction in the fiber surface area. The adsorption performance of the nanofiber mat was assessed as a function of pH, nanofiber mat dosage, contact time, and initial dye concentration. Kinetics and isotherms analysis were investigated as well. The MB separation capability of the modified PA-nanofiber was considerably higher than that of the PAnanofiber. The kinetic data of both nanofiber mat was better fitted with the pseudo-second-order model. Also, the equilibrium data of PA-nanofiber was better fitted with Freundlich model and Langmuir model in case of the modified PA-nanofiber. The adsorption behavior was favorable chemisorption process as inferred from the kinetics, and the isotherms studies. The results of this study promote the modified PA-nanofiber as a potential adsorption filters for dyeing wastewater decolourization.

show abstract

Surface modification of phosphoric acid activated carbon by using non-thermal plasma for enhancement of Cu(II) adsorption from aqueous solutions

Cited by 81 publications

References 51 publications

Adsorption Isotherms and Kinetics of Lead and Cadmium Ions: Comparative Studies Using Modified Melon (Citrullus colocynthis) Husk

Adsorption Isotherms and Kinetics of Lead and Cadmium Ions: Comparative Studies Using Modified Melon (Citrullus colocynthis) Husk

A Promising Solution for Food Waste: Preparing Activated Carbons for Phenol Removal from Water Streams

Fabrication, characterization, and dye adsorption capability of recycled modified polyamide nanofibers

Contact Info

Product

Resources

About