Removal of malachite green from aqueous solution using nano-iron oxide-loaded alginate microspheres: batch and column studies

Soni, Anjali; Tiwari, Alka; Bajpai, A. K.

doi:10.1007/s11164-012-1011-1

Cited by 39 publications

(24 citation statements)

References 33 publications

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“…Furthermore, MG is used as the microbicide, fungicide, and parasiticide. MG has a negative influence on immune and reproductive systems, thus it is necessary to remove MG and MB from wastes [9,10].…”

Section: Introductionmentioning

confidence: 99%

Adsorption of Methylene Blue and Malachite Green from Aqueous Solutions on Mesoporous Carbon-Nickel and Carbon-Zinc Composites

Jedynak¹

2017

Eng. Prot. Environ.

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Adsorpcja błękitu metylenowego i zieleni malachitowej z roztworów wodnych na mezoporowatych kompozytach węglowo-niklowych i węglowo-cynkowychIn this work adsorption of methylene blue and malachite green on mesoporous carbon-nickel and carbon-zinc composites (ST-A-Ni, ST-A-Ni(NO3)2-imp and ST-A-Zn, ST-A-Zn(NO3)2-imp) were investigated. These materials were obtained by the soft-templating method in presence of various precursors containing nickel or zinc. Nanoparticles of nickel or zinc and solutions of nickel nitrate(V) or zinc nitrate(V) were used as a source of nickel and zinc.Low-temperature nitrogen adsorption isotherms were determined for investigated materials and they were used for porous structure parameters calculation. . Participation of mesoporosity in the total porosity of carbon composites is from approx. 44% to approx. 78%. This means that studied carbons are in fact mesoporous materials, with considerable domination of mesoporosity over the microporosity. The exception is composite ST-A-Zn were the microporosity value is a little bit higher than mesoporosity. The mesopores dimension for the maximum of the distribution function (in the range of mesopores) was determined by Kruk-Jaroniec-Sayari (KJS) method. This dimension was approx. 7 nm for all investigated adsorbents.SEM photos confirmed the presence of ordered mesopores, particularly in materials obtained as a result of zinc nitrate impregnation. Also the presence of nickel nanoparticles, with different dimensions and shapes (ST-A-Ni), was confirmed by SEM photos.The concentrations of adsorbates, before and after adsorption, were determined by spectrophotometric method. Adsorption experiments were carried out at 25°C temperature. The adsorption equilibrium for investigated in this work mesoporous compositions (carbon--metal-composite -colorant solution) was settled after 90 minutes (ST-A-Ni(NO3)2-imp-MB and ST-A-Zn(NO3)2-imp-MB), after 120 minutes (ST-A-Ni-MB), after 240 minutes (ST-A-Ni-MG) and for the rest of investigated compositions after 360 minutes. The studies of adsorption process velocity showed that in most cases adsorption kinetics proceeded according to pseudo II-order reaction model. Only in one case according to pseudo I-order reaction model: for ST-A-Zn (malachite green). Obtained adsorption isotherms were substituted into the Langmuir equation and Freundlich equation. Adsorption process of methylene blue and malachite green on all studied carbon-metal composites proceed in accordance to adsorption model described by Langmuir equation. Adsorption ability of studied mesoporous carbon materials is significantly higher for methylene blue than for malachite green. The best adsorbent for methylene blue was carbon ST-A-Zn(NO3)2-imp (qm = 104.17 mg/g), the worst K. Jedynak 44 adsorbent was carbon ST-A-Zn (qm = 6.65 mg/g). In the case of malachite green the best adsorbent was carbon ST-A-Ni (qm = 58.82 mg/g) and the worst adsorbent was carbon ST-A-Zn (qm = 4.25 mg/g). On the basis of K constant from Langmuir equation the value of free ent...

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Section: Introductionmentioning

confidence: 99%

Adsorption of Methylene Blue and Malachite Green from Aqueous Solutions on Mesoporous Carbon-Nickel and Carbon-Zinc Composites

Jedynak¹

2017

Eng. Prot. Environ.

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“…The methylene blue (MB), malachite green (MG) and methyl orange (MO) dyes are used on large scale in dying industries ( Table 1). The MG is a cationic water soluble dye used in textile industries for coloring nylon, wool, silk, leather, cotton and jute [1][2][3][4][5]. Also, it finds application as antifungal, antibacterial and anti-parasitical agent in agriculture, fish hatchery and animal husbandry [1,3,5,6].…”

Section: Introductionmentioning

confidence: 99%

“…The MG is a cationic water soluble dye used in textile industries for coloring nylon, wool, silk, leather, cotton and jute [1][2][3][4][5]. Also, it finds application as antifungal, antibacterial and anti-parasitical agent in agriculture, fish hatchery and animal husbandry [1,3,5,6]. In anaerobic conditions, the bacteria commonly present in mammalian intestine convert malachite green into toxic colorless leucomalachite green, which poses carcinogenic, mutagenic and teratogenic effects on aquatic life [1,4,7].…”

Section: Introductionmentioning

confidence: 99%

“…Physical (precipitation, adsorption) [1,5,[13][14][15][16] chemical [10]; biological [2,6,17,18], photocatalytic [19,20,21,22,23]; electro-oxidation [4,9,[24][25][26]; electro-reduction [27,28,29]; photoelectrochemical [30,31,32]; electro-Fenton [33,34,35] are amongst the most recognized methods. The electrochemical oxidation method has attracted a large group of researchers in the past three decades.…”

Section: Introductionmentioning

confidence: 99%

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The Effect of Cathode Materials on Indirect Electrochemical Oxidation of Methyl Orange, Malachite Green and Methylene Blue

Rao¹,

Venkatarangaiah²

2014

Port. Electrochim. Acta

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The influence of cathode material on the electrochemical degradation of methyl orange (MO), methylene blue (MB) and malachite green (MG) dyes was investigated. The cathode materials used were platinum (Pt), copper (Cu), zinc (Zn) and aluminum (Al). The electrochemical activity of the selected dyes on the metal cathodes was examined by cyclic voltammetry (CV). The electrochemical treatment was carried out in both divided and undivided cells. The degradation process was monitored by UV-Visible spectroscopy and chemical oxygen demand (COD) measurement. The influence of pH on discoloration and degradation of dyes was studied. The power consumption and current efficiency of the treatment process involving different cathode materials was computed and compared. The role of cathode material in the degradation of dyes has been established.

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“…With the rapid development of nanotechnology, magnetic nanoparticles have been widely applied in the field of water and wastewater treatment. Fe 3 O 4 nanoparticles are a type of material characterized by having a larger specific surface area, exhibiting a stronger adsorption capacity, and easy separation [8].…”

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confidence: 99%

Advanced Treatment of Leachate Secondary Effluent by a Combined Process of MFPFS Coagulation and Sulfate Radical Oxidation

Liu¹,

Zhan²,

Nie³

2016

Pol. J. Environ. Stud.

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The sanitary landfill has been widely accepted for municipal solid waste treatment and disposal due to its lower cost of operation and maintenance as compared to others. However, landfill leachate is considered to be a heavily polluted and a likely hazardous wastewater that is produced during the biochemical decomposition of solid waste or as a result of water infiltration through solid waste. Landfill leachate exhibits considerable spatial and temporal variations. The chemical composition of landfill leachate primarily depends on site operations, refuse characteristics, and internal processes, and the major determinants are, in general, the amount and Pol. J. Environ. Stud. Vol. 25, No. 4 (2016), 1615-1622 Original Research AbstractLeachate secondary effluent is usually unable to meet the national discharge permit in China and further treatment is a significant challenge because of the residual persistent pollutants. A novel magnetic composite coagulant of MFPFS was prepared from Fe 3 O 4 nanoparticles and polymeric ferric sulfate (PFS). Landfill leachate secondary effluent was treated by MFPFS coagulation combined with sulfate radical oxidation due to Fe 2+ activation. Higher COD and color removals were achieved using the MFPFS magnetic coagulant than by adding the coagulant PFS alone. Under the working conditions of 1:3 Fe 3 O 4 /PFS mass ratios, 1.2 g/L MFPFS dosage, 50 min sedimentation time, and without pH adjustment, the removals of COD and color reached up to 60% and 80%, respectively. In the oxidation process, Na 2 S 2 O 8 was activated by Fe 2+ to generate sulfate radicals to oxide the residual pollutants in the effluent from MFPFS coagulation.In general, higher temperature, higher dosage, and lower pH were in favor of the oxidation efficiencies. Under the working conditions of 2.4 g/L Na 2 S 2 O 8 dosage, 0.3 Fe 2+ /S 2 O 8 2-molar ratio, pH 3.0, and 60ºC temperature, the COD and color removals can reach up to 75% and 95%. After being treated by the combined process, no violation of Chinese effluent standards for landfill leachate was found in respect of each individual parameter, including COD, color, and other parameters like BOD, total nitrogen, and ammonia nitrogen. The combined process was a promising alternative treatment pathway for leachate secondary effluent.

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Removal of malachite green from aqueous solution using nano-iron oxide-loaded alginate microspheres: batch and column studies

Cited by 39 publications

References 33 publications

Adsorption of Methylene Blue and Malachite Green from Aqueous Solutions on Mesoporous Carbon-Nickel and Carbon-Zinc Composites

Adsorption of Methylene Blue and Malachite Green from Aqueous Solutions on Mesoporous Carbon-Nickel and Carbon-Zinc Composites

The Effect of Cathode Materials on Indirect Electrochemical Oxidation of Methyl Orange, Malachite Green and Methylene Blue

Advanced Treatment of Leachate Secondary Effluent by a Combined Process of MFPFS Coagulation and Sulfate Radical Oxidation

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