Adsorption of arsenic anions in water using modified lignocellulosic adsorbents

B, Zambrano Guisela; Almeida, Ohana Nadine de; S, Duarte Dalvani; G, Velasco Fermin; HM, Luzardo Francisco; González, Luis Nieto

doi:10.1016/j.rineng.2022.100340

Cited by 23 publications

(8 citation statements)

References 96 publications

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“…The effect of zeolite mass on the sorption kinetics of copper was studied using three different sorbent dosages. The sorption capacity decreased from 1.417 mmol/g to 1.144 mmol/g as the sorbent dose increased from 5 g/dm 3 to 10 g/dm 3 as shown in Figure 8a. Moreover, for the sorbent mass increase investigated, the removal of copper on the zeolite increases from 59.377 to 95.797% (Table 2).…”

Section: Resultsmentioning

confidence: 91%

“…The experiments were performed as a function of zeolite mass. Three different zeolite masses were used: m 1 = 10.50 g, m 2 = 15.75 g and m 3 = 21.00 g with corresponding mass concentrations of zeolite suspension of γ 1 = 5.00 g/dm 3 , γ 2 = 7.50 g/dm 3 and γ 3 = 10.00 g/dm 3 , respectively.…”

Section: Batch Reactormentioning

confidence: 99%

“…Contamination of water and wastewater with heavy metals is the result of various activities such as metal plating, mining and agriculture [2]. Standard techniques for the heavy metal ions removal from aqueous effluents include precipitation, electroplating, evaporation, membrane separation and sorption [3,4]. Number of research studies have been conducted to study the removal of metals, including copper, from the environment.…”

Section: Introductionmentioning

confidence: 99%

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Zeolite NaX Mass and Propeller Agitator Speed Impact on Copper Ions Sorption

Bašić

Penga

et al. 2023

Processes

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Sorption is often carried out in stirred batch reactors without any consideration of how much mixing is sufficient to avoid the effect of diffusion without compromising yield and cost due to overmixing. Therefore, the focus of this work was to study how the maximum sorption capacity, removal efficiency, kinetics and power consumption (P) of the studied process are affected by different mixing speeds, i.e., impeller speed/minimum impeller speed for complete suspension (N/NJS) ratio values and zeolite suspension mass concentrations. Experiments were conducted in a baffled reactor with the propeller at a standard off-bottom clearance. In addition to the experimental studies, numerical modelling approaches were carried out to investigate the sorption process using a transient multiphase computational fluid dynamics model and fitting selected kinetic models. The results show that an increase in zeolite mass leads to a slight increase in the NJS and consequently PJS. The impeller speed affects the velocities, power consumption, kinetics, final amount and removal efficiency of copper sorbed. The experimentally determined kinetic data fit Ritchie’s kinetic model well. However, for two experiments, performed at N/NJS ratios of 0.8 and 0.6, Mixed kinetic model fits better, suggesting that the second-order reaction is suppressed by diffusion. Due to the influence of diffusion, the experimentally determined sorption efficiency decreased from 59.377% to 54.486% and 46.372% for N/NJS ratios of 0.8 and 0.6, respectively.

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Section: Resultsmentioning

confidence: 91%

Section: Batch Reactormentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Zeolite NaX Mass and Propeller Agitator Speed Impact on Copper Ions Sorption

Bašić

Penga

et al. 2023

Processes

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“…The adsorption capacity of cellulosic materials is improved through pretreatment and chemical modification. Adsorbents are prepared through various methods including acidic and/or basic reactions, impregnation with metal ions or oxides, and reactions with organic compounds (Maia et al, 2021;Guisela et al, 2022;Asere et al, 2019). Deng et al (2016) reported the preparation of hyperbranched polyethylenimine modified cellulose fiber as an effective biosorbent for the removal of inorganic arsenic from aqueous solution.…”

Section: Adsorption Methods Using Cellulose-base Adsorbent For Fracti...mentioning

confidence: 99%

“…As(V) is more commonly found in negatively charged forms (Guisela et al, 2022). The trivalent state of arsenic "As(III)" maintains a neutral charge up to pH 9.2, rendering it resistant to removal from contaminated water.…”

Section: Adsorption Methods Using Cellulose-base Adsorbent For Fracti...mentioning

confidence: 99%