Magnetically modified Sargassum horneri biomass as an adsorbent for organic dye removal

Angelova, Ralitsa; Baldíková, Eva; Pospíšková, Kristýna; Maděrová, Zdeňka; Šafařı́ková, Mirka; Šafařı́k, Ivo

doi:10.1016/j.jclepro.2016.07.068

Cited by 97 publications

(27 citation statements)

References 34 publications

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“…Various environmental protection problems (e.g., water pollution) have resulted from the rapid development of industrialization and the significant increase in the human population. Dyes are widely used in many industries and can be harmful to aquatic life, the food web, and humans [1,2]. In fact, the presence of dyes in wastewater may reduce sunlight penetration, exhaust dissolved oxygen, prevent photosynthesis, and accumulate mutagenic and carcinogenic intermediates via chemical or biological reactions [3,4].…”

Section: Introductionmentioning

confidence: 99%

Performance Evaluation and Optimization of Dyes Removal using Rice Bran-Based Magnetic Composite Adsorbent

Ma¹,

Hong

Wang

2020

Materials

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Although several studies have explored green adsorbent synthesized from many types of agriculture waste, this study represents the first attempt to prepare an environmentally friendly rice bran/SnO2/Fe3O4-based absorbent with economic viability and material reusability, for the promotion of sustainable development. Here, rice bran/SnO2/Fe3O4 composites were successfully synthesized and applied for adsorption of reactive blue 4 (RB4) and crystal violet (CV) dyes in aqueous solutions. The adsorption data were well-fitted by the Langmuir isotherm model and the pseudo-second-order kinetic model. The maximum adsorption capacities of the RB4 and CV dyes as indicated by the Langmuir isotherm model were 218.82 and 159.24 mg/g, respectively. As results of response surface methodology (RSM) showed, the quadratic model was appropriate to predict the performance of RB4 dye removal. The findings exhibited that an optimum removal rate of 98% was achieved at 60 °C for pH 2.93 and adsorption time of 360 min. Comparative evaluation of different agricultural wastes indicated that the rice bran/SnO2/Fe3O4 composite appeared to be a highly promising material in terms of regeneration and reusability, and showed that the composite is a potential adsorbent for dye removal from aqueous solutions. Overall, the study results clearly suggest that an adsorbent synthesized from rice bran/SnO2/Fe3O4 magnetic particle composites provides encouraging adsorption capacity for practical applications for environmental prevention.

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Section: Introductionmentioning

confidence: 99%

Performance Evaluation and Optimization of Dyes Removal using Rice Bran-Based Magnetic Composite Adsorbent

Ma¹,

Hong

Wang

2020

Materials

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“…Plant biomass exists widely in nature and can be used as a readily available and low-cost adsorbent. These adsorbents have an unrivalled microstructure that is particularly favorable in applications such as catalysis and adsorption [ 25 ], and their chemical combination consists of cellulose and lignin with various polar functional groups such as carboxylic, ether, hydroxyl, carbonyl and phenolic groups [ 25 , 26 , 27 ]. Cortaderia selloana is a tussock and perennial grass native to South America; however, it is found in many countries and areas around the world.…”

Section: Introductionmentioning

confidence: 99%

Adsorption of Lead Ions by a Green AC/HKUST-1 Nanocomposite

2020

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A new nanocomposite consisting of activated carbon (AC) from the Cortaderia selloana flower and copper-based metal-organic framework (HKUST-1) was synthesized through a single-step solvothermal method and applied for the removal of lead ions from aqueous solution through adsorption. The nanocomposite, AC/HKUST-1, was characterized by Scanning Electron Microscopy (SEM), X-ray Diffraction (XRD), Fourier Transform Infrared (FTIR), and Energy-Dispersive X-ray Spectroscopy (EDX) methods. The SEM images of both HKUST-1 and AC/HKUST-1 contain octahedral crystals. Different factors affecting adsorption processes, such as solution pH, contact time, adsorbent dose, and initial metal pollution concentration, were studied. The adsorption isotherm was evaluated with Freundlich and Langmuir models, and the latter was fitted with the experimental data on adsorption of lead ion. The adsorption capacity was 249.4 mg g−1 for 15 min at pH 6.1, which is an excellent result rivalling previously reported lead adsorbents considering the conditions. These nanocomposites show considerable potential for use as a functional material in the ink formulation of lead sensors.

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“…Biomass from algae is originally a very potent adsorbent to absorb pollutants of inorganic materials like heavy metals [14][15][16] and organic materials originated from toxic dye agents [17,18]. Adsorption of metal ions and dyes on algal biomass occurs through reaction mechanisms involving the contribution of active groups of proteins, polysaccharides, and functional groups like hydroxyl, amino, sulfate ions, carboxyl, etc.…”

Section: Introductionmentioning

confidence: 99%

Application of Modified Green Algae Nannochloropsis sp. as Adsorbent in the Sequential Adsorption of Methylene Blue and Cu(II) Cations in Solution

Buhani

Wijayanti

Suharso

et al. 2020

Preprint

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Biomass of algae is a very potent adsorbent for absorbing liquid waste containing heavy metals and organic dyes. This study purposes to confirm the ability of adsorbents from green algae Nannochloropsis sp. modified with silica (ASN) and followed by coating magnetite particles (ASN-MPs) to absorb simultaneously the mixture of methylene blue (ME) and Cu(II) cations in aqueous solution. Simultaneous sorption of ME and Cu(II) cations to ASN and ASN-MPs was carried out by the Batch method with the interaction pH condition 7, contact time (15–120 minutes), and initial concentrations of ME and Cu(II) cations (0.1–1.0 mmol·L− 1). The simultaneous sorption parameters of ME and Cu(II) cations by ASN-MPs trend to comply the pseudo-second-order kinetics model by rate constant values for pseudo-second-order (k2), respectively 8.98 × 10− 3 and 9.78 × 10− 3 (g·mmol− 1·min− 1). The ME adsorption pattern and Cu(II) cations in the competition on ASN-MPs adsorbents, each tends to follow the Freundlich and Langmuir adsorption isotherms. Based on adsorption data, Cu(II) cations have a greater adsorption rate and capacity (qexp) compared to ME at the same contact time and initial concentration. Modified adsorbent from algae Nannochloropsis sp. with silica matrix and magnetite particle coating, is an adsorbent that has a high effectiveness in the collective sorption of ME and Cu(II) cations. Therefore, these adsorbents can be used for the adsorption of cation mixtures of heavy metals and organic dyes that are cationic in solution.

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Magnetically modified Sargassum horneri biomass as an adsorbent for organic dye removal

Cited by 97 publications

References 34 publications

Performance Evaluation and Optimization of Dyes Removal using Rice Bran-Based Magnetic Composite Adsorbent

Performance Evaluation and Optimization of Dyes Removal using Rice Bran-Based Magnetic Composite Adsorbent

Adsorption of Lead Ions by a Green AC/HKUST-1 Nanocomposite

Application of Modified Green Algae Nannochloropsis sp. as Adsorbent in the Sequential Adsorption of Methylene Blue and Cu(II) Cations in Solution

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