Removal of Acid Orang 7(AO7) Dye from Aqueous Solution by Using of Adsorption on to Rice Stem Waste: Kinetic and Equilibrium Study

Tilaki, R. A. D.; Balarak, Davoud; Ghasemi, Mehdi

doi:10.18869/acadpub.jhs.2.1.51

Cited by 7 publications

(3 citation statements)

References 21 publications

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“…Furthermore, we noted that the larger the initial concentration of AO7, the greater the amount of adsorption. Table 4 shows the excellent adsorption capacities of UiO-66 and UiO-67, which are much greater than other materials [ 1 , 7 , 45 , 46 ]. Compared with natural materials, the Zr-MOFs in this work have considerable advantages in adsorption capacity.…”

Section: Resultsmentioning

confidence: 99%

Ligands-Coordinated Zr-Based MOF for Wastewater Treatment

Tsai

Xie

et al. 2018

Nanomaterials

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Isostructural zirconium-based metal–organic frameworks (Zr-MOFs) have attracted the attention of researchers because of their remarkable stability at high temperatures and high pressures and their chemical stabilities against acids and bases. Due to this stability, Zr-MOFs can be utilized in adsorption research, and the adsorption performance of a Zr-MOF depends on the pore size and the surroundings of the MOF. In this study, as the dimensions changed and the adsorption was carried out, the Zr-MOF material remained stable, and the adsorption of the best state was achieved at 235 mg/g. Through the simulation of theoretical kinetic models of Zr-MOFs, we initially postulated that the adsorption capacity is proportional to the pore size and that acid orange 7 (AO7) was adsorbed by the MOFs. Afterwards, we verified our hypotheses through a series of Brunauer–Emmett–Teller (BET) data analysis; non-local density function theory (NLDFT) was mainly used to analyze the data. Moreover, we determined that physical adsorption occurs on the surface of the MOFs during the adsorption process, while chemisorption occurs in the form of dye molecules combining with active sites. Ultimately, we concluded that the larger the pore size, the stronger the adsorption capacity, and this contribution casts a new light on the issue of wastewater treatment.

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Section: Resultsmentioning

confidence: 99%

Ligands-Coordinated Zr-Based MOF for Wastewater Treatment

Tsai

Xie

et al. 2018

Nanomaterials

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“…The maximum adsorption capacities obtained from the Langmuir isotherm model were 35.83 mg/g for Acid Orange 7 and 32.63 for Basic Fuchsine, and results are comparable to or higher than previously reported data on the use of MOFs and other porous materials as adsorbents (Table 3). Rice stem biomass 10.20 [52] De-inked pulp waste sludge activated carbon (DIPSAC) Monodispersed mesoporous silica nanoparticles 14.70 [56] Biogenic apatite 16.24 [57] Gangue microspheres 24.16 [58] Polyacrylamide/laponite nanocomposite hydrogels (PAM/XLG) 24.45 [59] Malted sorghum mash 58.48…”

Section: Adsorption Isothermmentioning

confidence: 99%

Phosphonate metal–organic frameworks used as dye removal materials from wastewaters

Nistor

Muntean

Maranescu

et al. 2020

Applied Organom Chemis

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A very intense study class of complex porous materials, metal-organic frameworks (MOFs), composed of diverse central metallic ions attached to organic linkers, was used in this study as adsorbant materials from wastewaters. Phosphonate MOFs were prepared by the reaction of divalent inorganic salts (CoSO 4 Á7H 2 O, NiSO 4 Á6H 2 O, CuSO 4 Á5H 2 O,) with vinyl phosphonic acid in hydrothermal conditions, obtaining cobalt, nickel, and copper vinylphosphonate (CoVP, NiVP, and CuVP). During synthesis the experimental conditions were varied in terms of time, temperature, and pH. The synthesized materials were characterized by Fourier transform infrared, thermogravimetric analysis, scanning electron microscopy, and X-ray crystallography. The efficiency of MOFs as adsorbents was investigated for diverse initial dye concentrations at different pH values and at three temperatures (25, 40, and 55 C). The synthesized materials presented good efficiency in the elimination of anionic as well as cationic type of dyes from aqueous solutions. The highest adsorption capacities were obtained working at optimum solution pH 4.2 for Acid Orange 7 and 10 for Basic Fuchsine, using 1 g/L of MOFs at room temperature (25 C). The adsorption capacities increase in the following order: CuVP < NiVP < CoVP. K E Y W O R D S adsorption, dyes removal, phosphonate metal organic frameworks 1 | INTRODUCTION Industry is a huge source of water pollutants such as toxic materials, rare earth elements, and organic dyes, which are extremely harmful for people, animals, and the environment. [1-4] Worldwide, water pollution become a major environmental problem because of rapid industrialization and urbanization. [5] Pollutants from the leather, plastic, textile, paper, rubber, cosmetic, and food industries can harm environmental protection, living organisms, and global ecosystems if no suitable treatments are available. About 10-15% of commercial dyes formed from the textile industries are let out into the environment every year. [6,7] Organic dyes do not decompose readily under normal conditions because of their stable and complex chemical structures. Most of these dyes are toxic and carcinogenic. [6,8-10] Dyes are mostly stable to light, oxidizing agents, and heat, and are very soluble in water. [11] The direct release of colored wastewater into the environment disturbs its ecological status by causing numerous undesirable changes. [8,11] As regulation has become stricter, significant importance has been given to the treatment of dye-containing wastewaters. [5,12] Therefore, the

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“…The essential feature of the Langmuir isotherms can be expressed by means of R L , a dimensionless constant referred to as the separation factor or equilibrium parameter. R L is calculated using the following equation [46][47][48]:…”

Section: K 298 K 323 Kmentioning

confidence: 99%

Studies on the Removal of Amoxicillin by Single Walled Carbon Nanotubes

Balarak

Mahdavi

Maleki

et al. 2016

BJPR

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The research was conducted to determine effectiveness of CNTs as sorbents for removal of AMO from aqueous solution and to analyze the impact of various parameters including adsorbent dosage, initial Amoxicillin concentration, contact time and temperature on the adsorption capacity of CNTs. The percentage of AMO removal decreased with increase in initial concentration. Adsorption equilibrium of AMO removal was observed after 45 min of contact time. Maximum AMO removal efficiency was obtained to be 99.1% and best results were achieved in contact time of 45 min, adsorbent dosage of 0.3 g/l, initial AMO concentration of 200 mg/l and temperature equal with 323 K. Equilibrium data were fitted to Langmuir and Freundlich isotherms, and their constants were determined. Using the linear correlation coefficients showed that the Langmuir isotherm best fits the AMO adsorption data on SWCNTs. The experimental data were fitted into the following kinetic Original Research Article models: pseudo-first-order, pseudo observed that the pseudo-secondany other kinetic models. All results found concluded that SWCNTs could be effe as an effective new adsorbent for the removal of Antibiotics from aqueous solutions.

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Removal of Acid Orang 7(AO7) Dye from Aqueous Solution by Using of Adsorption on to Rice Stem Waste: Kinetic and Equilibrium Study

Cited by 7 publications

References 21 publications

Ligands-Coordinated Zr-Based MOF for Wastewater Treatment

Ligands-Coordinated Zr-Based MOF for Wastewater Treatment

Phosphonate metal–organic frameworks used as dye removal materials from wastewaters

Studies on the Removal of Amoxicillin by Single Walled Carbon Nanotubes

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