Removal of humic acid from aqueous solution using MgO nanoparticles

Rasuli, Leila; Mahvi, Amir Hossein

doi:10.3103/s1063455x16010045

Cited by 10 publications

(6 citation statements)

References 24 publications

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“…Biotechnology methods use microbes and other low cost naturally occurring materials are costly, energy demanding and generating large quantities of sludge. Adsorption was revealed as the most promising and widely used method for the removal of both inorganic and organic pollutants from contaminated water [5][6][7][8][9][10][11]. Activated carbon of higher surface area and adsorption capacity was involved extensively in removal of various toxic organic pollutants [12].…”

Section: Introductionmentioning

confidence: 99%

Mesoporous MgO nanoparticles as a potential sorbent for removal of fast orange and bromophenol blue dyes

Ahmed

Abou-Gamra

2016

Nanotechnol. Environ. Eng.

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The removal of fast orange 3R and bromophenol blue dyes was successfully performed on mesoporous MgO nanoparticles. MgO nanoparticles were prepared by sol-gel route using CTAB as template agent. The crystalline, texture and the morphology feature of the prepared nanoparticles were investigated using X-ray diffraction, adsorption-desorption isotherm, scanning electron microscope, transmission electron microscope and high resolution transmission electron microscope. The results showed that the formation of nanorods of average size about 24 nm in diameter and 38 nm in length. Adsorption of both dyes changed crystallography of catalyst from cubic MgO to hexagonal Mg(OH) 2. This research work investigated the factors affecting dye uptake such as contact time, catalyst dosage, initial dye concentration and temperature. Different types of adsorption isotherms and kinetic models were performed to get a clear picture on the mechanism and the kinetic of the adsorption process. Thermodynamic parameters such as free energy, entropy and enthalpy were estimated. The experimental results showed that the adsorption equilibrium data are fitted well to the Langmuir and Freundlich isotherms. The adsorption isotherms indicated that the adsorption capacities are 30 and 40 mg g-1 for fast orange and bromophenol blue, respectively. The adsorption processes follow pseudo-second-order rate equation. Enthalpy change (DH°) for fast orange and bromophenol blue dye is ?37.8 and ?7.3 kJ mol-1 , respectively, indicating that the removal processes are endothermic. The negative values of free energy (DG°) suggested that the adsorption processes are spontaneous.

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Section: Introductionmentioning

confidence: 99%

Mesoporous MgO nanoparticles as a potential sorbent for removal of fast orange and bromophenol blue dyes

Ahmed

Abou-Gamra

2016

Nanotechnol. Environ. Eng.

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“…Experimental procedure HA separation. HA portions are major in dissolved organics (Rasuli and Mahvi, 2016) and recognized as the key reason for the severe colour and high COD of stabilized leachate (Liu et al, 2019). The low-pressure microfiltration and centrifugation were implemented before coagulation to eliminate the HA, with novel modification and more precision of Zhiping method (Liu et al, 2015).…”

Section: % Removal Ementioning

confidence: 99%

Optimization of the humic acid separation and coagulation with natural starch by RSM for the removal of COD and colour from stabilized leachate

et al. 2021

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The removal of concentrated colour (around 5039 Pt–Co) and chemical oxygen demand (COD; around 4142 mg L−1) from matured landfill leachate through a novel combination of humic acid extraction and coagulation with natural oil palm trunk starch (OPTS) was investigated in this study. Central composite design from response surface methodology of Design Expert-10 software executed the experimental design to correlate experimental factors with desired responses. Analysis of variance developed the quadratic model for four factors (e.g. coagulant dosage, slow mixing speed and time and centrifugation duration) and two responses (% removal of colour, COD). The model confirmed the highest colour (84.96%) and COD (48.84%) removal with a desirability function of 0.836 at the optimum condition of 1.68 g L−1 coagulant dose, 19.11 rpm slow mixing speed, 16.43 minutes for mixing time and 35.75 minutes for centrifugation duration. Better results of correlation coefficient ( R2 = 0.98 and 0.96) and predicted R2 (0.94 and 0.84) indicates the model significance. Electron microscopic images display the amalgamation of flocs through bridging. Fourier transforms infrared spectra confirmed the existence of selected organic groups in OPTS, which eventually signifies the applied method.

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“…Oleh karena itu, metode adsorpsi dipilih untuk pengolahan air gambut karena murah, mudah untuk dilakukan, dan banyak senyawa organik yang hilang. Adsorben yang telah digunakan untuk adsorpsi pada air gambut di antaranya material komposit [4], [5], nanopartikel [6], [7], zeolit [8], [9], geopolimer [10], [11] dan biomassa [12], [13]. Meskipun metode adsorpsi memiliki beberapa kelemahan seperti adsorben yang jenuh akan menyebabkan pencemaran dan efektivitas adsorpsi bergantung pada pH, hal ini dapat diatasi dengan menggunakan adsorben Ca-alginat.…”

Section: Pendahuluanunclassified

Ca-ALGINAT UNTUK ADSORPSI Fe DAN Mn PADA AIR GAMBUT

Harfinda

2020

J. Kim. Mul

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Ca-alginate for the adsorption of Fe and Mn in peat water has been carried out using a batch method. Brownish water color, low pH, and high content of Fe and Mn metals are obstacles in direct utilization of peat water. Peat water treatment can be done by the adsorption method. The stages of this study began with the preparation of the adsorbent by dripping Na-alginate solution into a variety of CaCl2 solution concentrations. Furthermore, the adsorption of peat water was carried out by batch method with variations in the contact time and mass of the adsorbent to get the adsorbent with the highest % removal. The optimal contact time for Fe and Mn adsorption on peat water is 6 hours. The optimal % removal value for the influence of Fe adsorption contact time for Ca-alginate variations of 0.1 M and 0.2 M CaCl2 solution were 20.38% and 21.19%, respectively. The optimal % removal value for the influence of Mn adsorption contact time for Ca-alginate variations of 0.1 M and 0.2 M CaCl2 solution were 30.98% and 41.37%, respectively. The optimal mass of adsorbent for Fe and Mn adsorption in peat water is 0.75 g. The optimal % removal value for the influence of Fe adsorption mass adsorption for Ca-alginate variations of 0.1 M and 0.2 M CaCl2 solution were 79.28% and 21.67%, respectively. The optimal % removal value for the mass effect of Mn adsorption adsorption for Ca-alginate variation of 0.1 M and 0.2 M CaCl2 solution respectively at 24.44% and 26.13%.

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Removal of humic acid from aqueous solution using MgO nanoparticles

Cited by 10 publications

References 24 publications

Mesoporous MgO nanoparticles as a potential sorbent for removal of fast orange and bromophenol blue dyes

Mesoporous MgO nanoparticles as a potential sorbent for removal of fast orange and bromophenol blue dyes

Optimization of the humic acid separation and coagulation with natural starch by RSM for the removal of COD and colour from stabilized leachate

Ca-ALGINAT UNTUK ADSORPSI Fe DAN Mn PADA AIR GAMBUT

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