Kinetic and equilibrium isotherm studies for the removal of acid blue 113 dye by dried corallina officinalis alga as a novel eco-friendly adsorbent

Water pollution is an alarming problem in developing countries. Dried algae can be considered as potential and suitable bio-sorbents due to their fast and easy growth and high availability. The special surface properties of these algae allow them to adsorb different types of organic and inorganic pollutants from solutions. In this context, the removal of anionic acid blue 113 dye (AB113) from aqueous solutions by dried Corallina officinalis alga as low-cost bio-sorbent was chosen as a case study of a typical remediation process of water contaminants. The effect of various environmental and physicochemical parameters has been studied. The results show that the equilibrium adsorption was established within 120 min. The sorption phenomenon was investigated by determining the process kinetics at different concentrations and the adsorption isotherms at different temperatures. The kinetics results showed that the pseudo second-order kinetics model generates the best agreement with the experimental data. The modeling results showed that linear Langmuir and Freundlich models appear to fit the adsorption data better than Temkin model for the adsorption of AB113 onto dried C. officinalis alga. It can be concluded that C. Officinalis alga can be successfully used as adsorbent.

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Potential use of waste from tree pruning and recovered plastic to obtain a building material: Case study of Merida, Mexico

Waste Management & Research ◽

10.1177/0734242x20928404 ◽

2020 ◽

Vol 38 (11) ◽

pp. 1222-1230

Author(s):

Ricardo Herbé Cruz-Estrada ◽

Javier Guillén-Mallette ◽

Carlos Vidal Cupul-Manzano ◽

Josué Iván Balam-Hernández

Keyword(s):

Building Material ◽

Mechanical Performance ◽

Low Cost ◽

Weight Ratio ◽

Plastic Composite ◽

Trees And Shrubs ◽

Tree Pruning ◽

Potential Use ◽

Better Than

This work presents a study on the use of wood and plastic wastes generated in abundance in Merida, Mexico, to help to reduce them in order to mitigate environmental deterioration. The use of these wastes is proposed to obtain a low-cost building material. So, the escalation process (i.e., extrusion) at the pilot level to obtain a prototype of a wood–plastic composite (WPC) corrugated sheet to evaluate the technical feasibility to make a low-cost product is reported. A corrugated sheet with recycled high-density polyethylene (R-HDPE) was produced. The R-HDPE was collected from Merida’s Separation Plant. The wood came from the trimmings of different varieties of trees and shrubs that are periodically pruned. WPC sheets with virgin HDPE were prepared to assess its effect on the materials’ mechanical performance. The wood/HDPE weight ratio was 40/60. The performance of the WPC sheets was compared with that of commercial products with similar characteristics, namely acrylic and polyester sheets reinforced with fibreglass, and black asphalt-saturated cardboard sheets. Thus, the effect of natural weathering on the maximum tensile tearing force and on the maximum flexural load of the different types of sheets was evaluated. Although the mechanical performance of the WPC sheets was lower than that of the acrylic and polyacrylic sheets, their performance was much better than that of the cheap black asphalt-saturated cardboard sheets. So, they are a good option to be used as low-cost temporary roofing.

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Adsorption of Hexavalent Chromium Using Banana Pseudostem Biochar and Its Mechanism

Sustainability ◽

10.3390/su10114250 ◽

2018 ◽

Vol 10 (11) ◽

pp. 4250 ◽

Cited By ~ 12

Author(s):

Shuang Xu ◽

Weiguang Yu ◽

Sen Liu ◽

Congying Xu ◽

Jihui Li ◽

...

Keyword(s):

Photoelectron Spectroscopy ◽

Pyrolysis Temperature ◽

Low Cost ◽

Surface Adsorption ◽

Maximum Adsorption Capacity ◽

X Ray ◽

Adsorption Processes ◽

Different Temperatures ◽

Pseudo Second Order ◽

Porosity Analysis

A low-cost biochar was prepared through slow pyrolysis of banana pseudostem biowaste at different temperatures, and characterized by surface area and porosity analysis, scanning electron microscopy (SEM), Fourier-transform infrared (FTIR) spectroscopy, and X-ray photoelectron spectroscopy (XPS). It was shown that the biochar prepared at low pyrolysis temperature was rich in oxygen-containing groups on the surface. Adsorption experiments revealed that the biochar prepared at 300 °C (BB300) was the best adsorbent for Cr(VI) with 125.44 mg/g maximum adsorption capacity at pH 2 and 25 °C. All the adsorption processes were well described by pseudo-second-order and Langmuir models, indicating a monolayer chemiadsorption. Furthermore, it was demonstrated that adsorption of Cr(VI) was mainly attributed to reduction of Cr(VI) to Cr(III) followed by ion exchange and complexation with the biochar.

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Integration of child–parent screening and cascade testing for familial hypercholesterolaemia

Journal of Medical Screening ◽

10.1177/0969141318796856 ◽

2018 ◽

Vol 26 (2) ◽

pp. 71-75 ◽

Cited By ~ 5

Author(s):

David S Wald ◽

Nicholas J Wald

Keyword(s):

Familial Hypercholesterolaemia ◽

Low Cost ◽

Preventive Treatment ◽

Median Cost ◽

Cascade Screening ◽

Cascade Testing ◽

Screening Study ◽

Index Cases ◽

Better Than

Objective To integrate child–parent screening and cascade testing into a single pathway-child-parent cascade screening (CPCS), for the identification of familial hypercholesterolaemia in the population and to estimate the number of new familial hypercholesterolaemia cases identified per child screened and the associated costs. Methods We applied the results from the published MRC Child–Parent Screening Study to 10,000 children, together with cascade testing first degree relatives of parents with a familial hypercholesterolaemia mutation identified by child–parent screening. We estimated the number of familial hypercholesterolaemia cases identified per child screened, the median cost per familial hypercholesterolaemia case identified and the median cost per child screened to identify one case using a range of cholesterol and familial hypercholesterolaemia mutation testing costs. We present a case study to illustrate the application of CPCS in practice. Results CPCS identifies one new familial hypercholesterolaemia case per 70 children screened at a median estimated cost of £960 per new familial hypercholesterolaemia case or £4 per child screened. CPCS identifies an average of four new familial hypercholesterolaemia cases per family. In the case study, six new familial hypercholesterolaemia cases were identified, and preventive treatment started in five, with the index child expected to start when older. Conclusion CPCS for familial hypercholesterolaemia are complementary strategies. The sustainability of cascade testing relies on identifying new unrelated index cases. This is achieved with population-wide child–parent screening. Integrated CPCS is currently better than either method of familial hypercholesterolaemia detection alone. It has the potential to identify all, or nearly all, individuals with familial hypercholesterolaemia in the population at low cost.

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Syringa vulgaris leaves powder a novel low-cost adsorbent for methylene blue removal: isotherms, kinetics, thermodynamic and optimization by Taguchi method

Scientific Reports ◽

10.1038/s41598-020-74819-x ◽

2020 ◽

Vol 10 (1) ◽

Author(s):

Giannin Mosoarca ◽

Cosmin Vancea ◽

Simona Popa ◽

Marius Gheju ◽

Sorina Boran

Keyword(s):

Methylene Blue ◽

Low Cost ◽

Dye Adsorption ◽

Maximum Adsorption Capacity ◽

Order Kinetic ◽

Adsorbent Surface ◽

Order Kinetic Model ◽

Endothermic Process ◽

Pseudo Second Order ◽

Better Than

Abstract In this study, the potential of a new low-cost adsorbent, Syringa vulgaris leaves powder, for methylene blue adsorption from aqueous solution was investigated. The adsorbent surface was examined using SEM and FTIR techniques. The experiments were conducted, in batch system, to find out the effect of pH, contact time, adsorbent dose, initial dye concentration, temperature and ionic strength on dye adsorption. The process is best described by Langmuir isotherm and the pseudo second order kinetic model. Maximum adsorption capacity, 188.2 (mg g−1), is better than other similar adsorbent materials. Thermodynamic parameters revealed a spontaneous and endothermic process, suggesting a physisorption mechanism. A Taguchi orthogonal array (L27) experimental design was used to determine the optimum conditions for the removal of dye. Various desorbing agents were used to investigate the regeneration possibility of used adsorbent. Results suggest that the adsorbent material is very effective for removal of methylene blue from aqueous solutions.

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Thermodynamics of Biosorption for Removal of Co(II) Ions by an Efficient and Ecofriendly Biosorbent (Saccharum bengalense): Kinetics and Isotherm Modeling

Journal of Chemistry ◽

10.1155/2013/528542 ◽

2013 ◽

Vol 2013 ◽

pp. 1-11 ◽

Cited By ~ 10

Author(s):

Muhammad Imran Din ◽

Muhammad Latif Mirza ◽

Sadia Ata ◽

Makshoof Athar ◽

Ijaz Ul Mohsin

Keyword(s):

Low Cost ◽

Research Work ◽

Activation Parameters ◽

Entropy Change ◽

Second Order ◽

Isotherm Models ◽

Adsorption Isotherm Models ◽

Pseudo Second Order ◽

Adsorption Of Co ◽

Langmuir And Freundlich Models

In this research work, a low-cost biomass derived from the pulp ofSaccharum bengalense(SB) was used as an adsorbent material/biosorbent for the removal of Co(II) ions from aqueous solution. Langmuir, Freundlich Timken, and Dubinin-Radushkevich (D-R) adsorption isotherms have been applied to further define the mechanism of sorption. From the comparison of different adsorption isotherm models, it was found that biosorption of Co(II) by SB followed Langmuir and Freundlich models. The sorption capacity for cobalt ofSaccharum bengalensewas ( mg/g) at 323K. A comparison of kinetic models applied to the adsorption of Co(II) ontoSaccharum bengalensewas evaluated for the pseudo-first-order, pseudo-second-order, Elovich, and intraparticle diffusion and Bangham's kinetics models. It was found that the pseudo-second-order mechanism is predominant. Activation parameters evaluated from thermodynamics and kinetic parameters such as free energy change , kJ/mol), enthalpy change , kJ/mol), and entropy change , kJ/mol) revealed the spontaneous, endothermic, and feasible nature of adsorption process. The results of the present investigation suggested thatSaccharum bengalense(SB) can be used as an environmentally and economically feasible biosorbent for the removal of Co(II) from aqueous solutions.

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Adsorption of reactive blue BF-5G dye by soybean hulls: kinetics, equilibrium and influencing factors

Water Science & Technology ◽

10.2166/wst.2015.589 ◽

2015 ◽

Vol 73 (5) ◽

pp. 1166-1174 ◽

Cited By ~ 10

Author(s):

Jacqueline Ferandin Honorio ◽

Márcia Teresinha Veit ◽

Gilberto da Cunha Gonçalves ◽

Élvio Antonio de Campos ◽

Márcia Regina Fagundes-Klen

Keyword(s):

Textile Industry ◽

Low Cost ◽

Dye Adsorption ◽

Point Of Zero Charge ◽

Textile Dye ◽

Soybean Hulls ◽

Treatment Techniques ◽

Different Temperatures ◽

Langmuir Isotherm Model ◽

Pseudo Second Order

The textile industry is known for the high use of chemicals, such as dyes, and large volumes of effluent that contaminate waters, a fact that has encouraged research and improved treatment techniques. In this study, we used unprocessed soybean hulls for the removal of reactive blue BF-5G dye. The point of zero charge of soybean hulls was 6.76. Regarding the speed of agitation in the adsorption process, the resistance to mass transfer that occurs in the boundary layer was eliminated at 100 rpm. Kinetics showed an experimental amount of dye adsorbed at equilibrium of 57.473 mg g−1 obtained under the following conditions: dye initial concentration = 400 mg L−1; diameter of particle = 0.725 mm; dosage = 6 g L−1; pH 2; 100 rpm; temperature = 30 °C; and duration of 24 hours. The pseudo-second order best showed the dye removal kinetics. The adsorption isotherms performed at different temperatures (20, 30, 40 and 50 °C) showed little variation in the concentration range assessed, being properly adjusted by the Langmuir isotherm model. The maximum capacity of dye adsorption was 72.427 mg g−1 at 30 °C. Since soybean hull is a low-cost industrial byproduct, it proved to be a potential adsorbent for the removal of the textile dye assessed.

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Activated bauxite waste as an adsorbent for removal of Acid Blue 92 from aqueous solutions

Water Science & Technology ◽

10.2166/wst.2010.514 ◽

2010 ◽

Vol 62 (11) ◽

pp. 2491-2500 ◽

Cited By ~ 12

Author(s):

Sh. Norouzi ◽

Kh. Badii ◽

F. Doulati Ardejani

Keyword(s):

Adsorption Kinetics ◽

Red Mud ◽

Adsorption Process ◽

Reaction Model ◽

Aluminum Production ◽

Activation Process ◽

Pseudo Second Order ◽

Kinetics Of ◽

Acid Blue ◽

Better Than

Bauxite waste, known as red mud, is produced in some industrial processes, such as aluminum production process. In this process, the waste material is produced from leached bauxite as a by product. In this research, the removal of Acid Blue 92 (AB92) dye was investigated from aqueous solution onto the activated bauxite waste (red mud) in a batch equilibration system. Besides, the influences of pH, adsorbent dosage, contact time, initial concentration of dye and temperature have been considered. It was found that the OH group is an effective functional group for the adsorption process. The intensity of the peaks correspond to OH group has been significantly climbed after the activation process. The adsorption kinetics of AB92 can be well described by the pseudo-second-order reaction model. Based on the isotherm data obtained from the fittings of the adsorption kinetics, the Langmuir model appears to fit the adsorption process better than the Freundlich and Brunauer-Emmett-Teller (BET) models.

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Adsorption of lead (II) ions onto novel cassava starch 5-choloromethyl-8-hydroxyquinoline polymer from an aqueous medium

Water Science & Technology ◽

10.2166/wst.2016.284 ◽

2016 ◽

Vol 74 (4) ◽

pp. 943-956 ◽

Cited By ~ 5

Author(s):

Prapti U. Shah ◽

Nirav P. Raval ◽

Mayur Vekariya ◽

Poonam M. Wadhwani ◽

Nisha K. Shah

Keyword(s):

Aqueous Medium ◽

Low Cost ◽

Cassava Starch ◽

Second Order ◽

Intraparticle Diffusion Model ◽

First Order ◽

Adsorption Capacities ◽

Pseudo Second Order ◽

Langmuir And Freundlich Models ◽

Time Lead

Adsorption of lead (II) ions onto cassava starch 5-choloromethyl-8-hydroxyquinoline polymer (CSCMQ) was investigated with the variation in the parameters of pH, contact time, lead (II) ions concentration, temperature and the adsorbent dose. The Langmuir and Freundlich models have been applied. CSCMQ was characterized by Fourier transform infrared spectroscopy and scanning electron microscopy. Results showed that the adsorption process was better described by the Langmuir model. Adsorption kinetics data obtained for the metal ions sorption were investigated using pseudo-first-order, pseudo-second-order and intraparticle diffusion model. The maximum adsorption capacities (qm) were 46.512, 43.859 and 42.735 mg/g at 25, 35 and 45 °C, respectively. The dynamical data fit well with the second-order kinetics model. The results indicate that CSCMQ could be employed as low-cost material for the adsorption of Pb(II) ions from aqueous medium.

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Adsorption of Acid Blue 113 using Nanocarbon Spheres and its Kinetic and Isotherm Studies

Asian Journal of Chemistry ◽

10.14233/ajchem.2019.21944 ◽

2019 ◽

Vol 31 (8) ◽

pp. 1653-1660

Author(s):

V. Priya ◽

S.K. Krishna ◽

V. Sivakumar ◽

P. Sivakumar

Keyword(s):

Solution Temperature ◽

Order Model ◽

Good Efficiency ◽

Freundlich Model ◽

Alternanthera Sessilis ◽

Sorption Energy ◽

Intra Particle Diffusion ◽

Pseudo Second Order ◽

Acid Blue 113 ◽

Acid Blue

Nanocarbon spheres were prepared from the stems of Alternanthera sessilis. Their characterization studies were performed and the application of nanocarbon spheres for the adsorption of acid blue 113 from the aqueous solution was studied. Effect of pH of effluent, effect of initial acid blue 113 concentration and the effect of solution temperature were analyzed. Pseudo-first order model, pseudo-second order model, Elovich model, Intra-particle diffusion model, Langmuir model, Freundlich model and thermodynamic parameters were used to evaluate the percentage and the amount of acid blue 113 dye removed. The kinetics follows multi-order and Langmuir type of isotherm. The ΔG, ΔH and ΔS parameters which relate to sorption energy were also evaluated. The outcome of the study indicates that nanocarbon sphere is a potential material for the sorption of acid blue 113 with good efficiency.

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