Equilibrium, kinetic and thermodynamic studies for sorption of Ni (II) from aqueous solution using formaldehyde treated waste tea leaves

Shah, Jasmin; Jan, M. Rasul; Haq, Atta ul; Zeeshan, Md.

doi:10.1016/j.jscs.2012.04.004

Cited by 52 publications

(18 citation statements)

References 28 publications

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“…Previous researchers have also reported the pseudo--second-order mechanism of MB adsorption onto coffee husks [27], spent tea [17,29], orange peel [31], and other adsorbents, such as rice husks [18]. In addition, this kinetic model was common for some other adsorbed dyes and heavy metals onto coffee and tea waste [1,21,30,39]. Figure 3.…”

Section: Kinetic Studymentioning

confidence: 86%

Plant waste materials from restaurants as the adsorbents for dyes

Pavlović¹,

Nikolić²,

Milutinović³

et al. 2015

Hem Ind

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This paper has demonstrated the valorization of inexpensive and readily available restaurant waste containing most consumed food and beverage residues as adsorbents for methylene blue dye. Coffee, tea, lettuce and citrus waste have been utilized without any pre-treatment, thus the adsorption capacities and dye removal efficiency were determined. Coffee waste showed the highest adsorbent capacity, followed by tea, lettuce and citrus waste. The dye removal was more effective as dye concentration increases from 5 up to 60 mg/L. The favorable results obtained for lettuce waste have been especially encouraged, as this material has not been commonly employed for sorption purposes. Equilibrium data fitted very well in a Freundlich isotherm model, whereas pseudo-secondorder kinetic model describes the process behavior. Restaurant waste performed rapid dye removal at no cost, so it can be adopted and widely used in industries for contaminated water treatment.

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Section: Kinetic Studymentioning

confidence: 86%

Plant waste materials from restaurants as the adsorbents for dyes

Pavlović¹,

Nikolić²,

Milutinović³

et al. 2015

Hem Ind

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“…Thermodynamic tests; according to the study of thermodynamics, the energy in an isolated system cannot be gained or lost when the entropy change is the driving force [60]. Thermodynamic parameters are given in equations (15) and (16) …”

Section: Adsorption Thermodynamicsmentioning

confidence: 99%

Kinetic and Isotherm Analysis of Cu(II) Adsorption onto Almond Shell (Prunus Dulcis)

Yıldız

2017

Ecological Chemistry and Engineering S

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Abstract:In the work, adsorption of Cu 2+ ions onto almond shell were investigated under different operational conditions. Almond shell was used without any pretreatment prior to the tests. The optimum conditions for adsorption of Cu 2+ ions through almond shell were determined to be; pH 5.0, temperature 20ºC, shaking rate 125 rpm, sorbent dose 0.3 g and initial Cu 2+ ion concentration 50 mg/dm 3 . The equilibrium duration of the system was 60 minutes. The sorption capacities of the sorbents were predicted with the aid of equilibrium and kinetic models. The interactions of peanut shell with metal ions were constituted by SEM, EDX, FT-IR, XRD and AFM. The pseudo-first-order, pseudo-second-order, Weber-Morris, Elovich model and Bangham kinetic models were applied to test the experimental data. The Cu +2 ions adsorption onto almond shell was better defined by the pseudo-second-order kinetic model, for initial pH. The equilibrium data were evaluated using Langmuir, Freundlich, Temkin, D-R and Harkins Jura isotherms. The highest R 2 value in isotherm studies was obtained from Langmiur isotherm (R 2 = 0.98) for the inlet concentration.

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“…19 Previous studies have centered their attention on the preparation of waste tea activated carbon 17,20 or on various treatments involving acetylation, isopropyl alcohol, formaldehyde, HNO 3 , pressure, and ultrasound. 17,[20][21][22][23][24] The aim of this study was to realize malachite green (MG) adsorption onto chemically modified waste green tea (WGT). Influence of the adsorbent quantity and temperature over the MG removal were also considered in order to investigate the WGT potential as a biosorbent.…”

Section: Indolean Et Almentioning

confidence: 99%

Adsorptive Removal of Malachite Green from Model Aqueous Solutions by Chemically Modified Waste Green Tea Biomass

Indolean

Burcă²,

Măicăneanu³

2017

ACSi

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The adsorption of malachite green (MG) from aqueous solution by waste green tea (WGT) biomass was investigated. A series of experiments in batch conditions were conducted in order to assess the MG removal on WGT, following adsorbent quantity and temperature influences. Maximum removal efficiency for untreated WGT was 89% (4 g biomass, 100 mL solution of 94 mg/L, 316 K). It was found that the adsorption of MG increased by increasing temperature from 296 to 316 K. Thermodynamic parameters (ΔH°, ΔS°, ΔG°) were calculated, and indicated that dye adsorption onto the studied biomass was endothermic and non-spontaneous. Six chemical treatments were tested (four acidic -H 3 PO 4 , H 2 SO 4 , HCl, and tartaric acid, one oxidant -H 2 O 2 , and one basic -NaOH) in order to study the chemical groups responsible for MG adsorption onto WGT biomass. The alkali and acidic treatments led to an increase of adsorption efficiency up to 92% and 95% (H 2 SO 4 ) respectively. The FTIR spectroscopy results emphasized the modifications of the biomass surface and how these are influencing the adsorption process.

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Equilibrium, kinetic and thermodynamic studies for sorption of Ni (II) from aqueous solution using formaldehyde treated waste tea leaves

Cited by 52 publications

References 28 publications

Plant waste materials from restaurants as the adsorbents for dyes

Plant waste materials from restaurants as the adsorbents for dyes

Kinetic and Isotherm Analysis of Cu(II) Adsorption onto Almond Shell (Prunus Dulcis)

Adsorptive Removal of Malachite Green from Model Aqueous Solutions by Chemically Modified Waste Green Tea Biomass

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