Adsorption of malachite green by magnetic litchi pericarps: A response surface methodology investigation

Zheng, Hao; Qi, Jinqiu; Jiang, Ruixue; Gao, Yan; Li, Xiaochen

doi:10.1016/j.jenvman.2015.07.057

Cited by 47 publications

(12 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…2, Pb(II) adsorption onto ABC soars strictly within 0.04-0.1 g of ABC dose. The Pb(II) removal increases from 41.37% to 99.81% suggesting a strong affinity between ABC and heavy metal, such as lead, which is similar to other report [28]. However, the Pb(II) removal increases slightly when dose of ABC increases from 0.1 to 0.14 g, that may be resulting from the aggregation of many fine particles and the lack of lead ions.…”

Section: Effect Of Abc Dosesupporting

confidence: 86%

Pb(II) removal from aqueous solution by cold KOH activated biochar of camphor leaves: isotherms, kinetics and thermodynamics

Cui¹,

Wang²,

Zhang³

2019

Desalination and Water Treatment

View full text Add to dashboard Cite

a b s t r a c tBiochar from camphor leaves was activated by low-cost cold KOH process (ABC) to improve Pb(II) removal from aqueous solution. Then ABC was characterized by Fourier transform infrared spectroscopy, X-ray diffraction, scanning electron microscopy and N 2 adsorption-desorption to reveal the benefits of cold KOH activation. The high adsorption capacity of ABC mainly results from oxygen-containing groups, porous structure and large surface area. Effect of factors including dose of ABC, pH, ionic strength, adsorption time, and temperature on Pb(II) adsorption was investigated by monofactor experiments. Through comparison with biochar (BC), optimization of ABC adsorption was revealed by kinetics, isotherms and thermodynamics. Pb(II) adsorption onto ABC is well described by pseudo-second-order kinetics and Langmuir isotherm, implying that chemisorption and monolayer adsorption are the rate-limiting steps. The thermodynamics indicates that Pb(II) adsorption onto ABC is spontaneous and exothermic. After cold KOH activation, the maximum adsorption capacity of Pb(II) onto ABC is 90.09 mg g -1 , higher than 62.27 mg g -1 of BC. ABC has an excellent dynamic and thermodynamic performance comparing with BC.

show abstract

Section: Effect Of Abc Dosesupporting

confidence: 86%

Pb(II) removal from aqueous solution by cold KOH activated biochar of camphor leaves: isotherms, kinetics and thermodynamics

Cui¹,

Wang²,

Zhang³

2019

Desalination and Water Treatment

View full text Add to dashboard Cite

show abstract

“…This study showed that the maximum biosorption capacity of TAS particles is 123.92 and 126.90 mg g -1 for EBT and MG, respectively. It can be seen that the TAS particles exhibit superior EBT and MG uptake capacity to that of previously reported adsorbents such as eucalyptus bark (Dave et al 2011), magnetite/pectin nanoparticles (Attallah et al 2016), Avena sativa (oat) hull (Banerjee et al 2016), and magnetic litchi pericarps (Zheng et al 2015). Thus, these results show that TAS, which is a readily available and cheap by-product, can be utilized as a potential adsorbent to reduce the concentration of EBT and MG dyes from contaminated water.…”

Section: Biosorption Isothermsmentioning

confidence: 69%

Adsorptive removal of cationic and anionic dyes from aqueous solution by utilizing almond shell as bioadsorbent

Arfi

Karoui

Mougin

et al. 2017

Euro-Mediterr J Environ Integr

109

View full text Add to dashboard Cite

Almond shell is a food waste that is utilized as bioadsorbent for the uptake of Eriochrome Black T (EBT) and Malachite Green (MG) dyes from aqueous solutions. The biomaterial was characterized by specific surface area (BET), scanning electron microscopy, Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis, and X-ray diffraction. The effects of the initial pH of solutions, particle size, adsorbent dosage, initial dye concentration, contact time, and temperature on the EBT and MG adsorption were studied using batch contact mode at 22°C. Rapid sorption dynamics following a second-order kinetic model were shown by kinetic studies. The adsorption equilibrium data were fitted well to the Freundlich isotherm for EBT and MG as anionic and cationic dyes, respectively. The adsorption of pollutants was exothermic (DH 0 = -1.7 kJ mol -1 for EBT and -32 kJ mol -1 for MG). The reaction was accompanied by a decrease in entropy (DS 0 \ 0 for EBT and MG). Negative values of DG 0 showed the spontaneity of the MG adsorption process. However, positive values of DG 0 showed that the EBT uptake by almond shell is not a spontaneous reaction. The results indicate that almond shell is a promising alternative for the biosorption of anionic (EBT) and cationic (MG) dyes from aqueous solutions.

show abstract

“…The efficacy of adsorption is determined by the ability of adsorbents to remove priority pollutants from the effluent [19, 20]. Some of the natural adsorbents used for dye removal are economical and abundant in nature, such as Prunus Dulcis [21], mangopeel [22], rambutan seed [23], litchi pericarps [24], coconut shell [25], cupuassu shell [26] and jackfruit [27]. There are no studies available in the literature describing the adsorption and optimization of operational variables for the removal of RhB using banana peel.…”

Section: Introductionmentioning

confidence: 99%

Adsorption of Rhodamine B dye from aqueous solution onto acid treated banana peel: Response surface methodology, kinetics and isotherm studies

et al. 2019

View full text Add to dashboard Cite

The adsorption of rhodamine B (RhB) using acid modified banana peels has been examined. Chemical characteristics of the adsorbents were observed in order to determine active functional groups. The major functional groups on the surface were OH, C = O, C = C and C-O-C. Interactions between operational parameters were studied using the central composite design (CCD) of response surface methodology (RSM). The predictions of the model output indicated that operational factors influenced responses at a confidence level of 95% (P<0.05). The optimum conditions for adsorption were pH 2 at a 0.2 g/L dose within 60 minutes of contact time. Isotherm studies were carried out using the optimized process variables. The data revealed that RhB adsorption fitted the Langmuir isotherm equation while the reduction of COD followed the Freundlich isotherm. Kinetic experiments fitted the pseudo second order model for RhB removal and COD reduction. The adsorption mechanism was not the only rate controlling step. Diffusion through the boundary layer described the pattern of adsorption.

show abstract

Adsorption of malachite green by magnetic litchi pericarps: A response surface methodology investigation

Cited by 47 publications

References 35 publications

Pb(II) removal from aqueous solution by cold KOH activated biochar of camphor leaves: isotherms, kinetics and thermodynamics

Pb(II) removal from aqueous solution by cold KOH activated biochar of camphor leaves: isotherms, kinetics and thermodynamics

Adsorptive removal of cationic and anionic dyes from aqueous solution by utilizing almond shell as bioadsorbent

Adsorption of Rhodamine B dye from aqueous solution onto acid treated banana peel: Response surface methodology, kinetics and isotherm studies

Contact Info

Product

Resources

About