Adsorption study with NaOH chemically treated soybean hull for textile dye removal

The activities of the textile industry generate effluents containing high chemical load, due to the presence of toxic dyes, causing water contamination. Adsorption is a promising technique for the removal of effluent dyes, however, studies are needed to look for alternative adsorbent materials, aiming at low cost and removal efficiency. The soybean hull (Glycine max) is an agroindustrial residue widely generated in Brazil, but its application is only for animal feed. The objective of this work was to evaluate the adsorption potential of chemically treated soybean hull with sodium hydroxide (NaOH) in the removal of 5G reactive blue dye. The biosorbent was subjected to NaOH treatment at different concentrations (0.01, 0.1 and 0.5 mol L-1), influence of temperature (30, 40 and 50 ºC), rotation speed (30, 60 and 90 rpm) and pH (1 to 11) was verified. The kinetics and equilibrium isotherms were performed using the best conditions obtained in the preliminary tests, and the experimental data adjusted to the theoretical models previously described in the literature. The studied variables indicated that the highest removal (about 88%) occurred under the conditions of 0.01 mol L-1 NaOH concentration, 50 ºC, 90 rpm and pH 2. In the kinetics, it was observed that the equilibrium was achieved in about 240 min, with the best fit of the pseudo-second order model. In isotherms, the Langmuir model better predicts experimental data, predicting a maximum adsorption capacity of 16.46 mg g-1. The soybean hull was effective in removing dyes in aqueous solution, however, NaOH treatment showed no relevant improvement in adsorptive capacity.

Download Full-text

Electrocoagulation Applied for Textile Dye Oxidation Using Iron Slag as Electrodes

10.21203/rs.3.rs-477015/v1 ◽

2021 ◽

Author(s):

Rafaela De Maman ◽

Vilson Conrado da Luz ◽

Laura Behling ◽

Adriana Dervanoski ◽

Clarissa Dalla Rosa ◽

...

Keyword(s):

Textile Industry ◽

Oxygen Demand ◽

Electrochemical Process ◽

Blue Dye ◽

Textile Dye ◽

Phenol Removal ◽

Good Efficiency ◽

Iron Slag ◽

Indigo Blue ◽

Textile Factory

Abstract The Indigo Blue dye is widely used in the textile industry, specifically in jeans dyeing, the effluents of which, rich in organic pollutants with recalcitrant characteristics, end up causing several environmental impacts, requiring efficient treatments. Several pieces of research have been conducted in search of effective treatment methods, among which is electrocoagulation. This treatment consists of an electrochemical process that generates its own coagulant by applying electric current on metallic electrodes, bypassing the use of other chemical products. The objective of this work was to evaluate the potential use of iron slag in the electrocoagulation of a synthetic effluent containing commercial dye Indigo Blue and the effluent from a textile factory. The quantified parameters were color, turbidity, pH, electrical conductivity, sludge generation, phenol removal, chemical oxygen demand (COD), and total organic carbon (TOC). The electrocoagulation treatment presented a good efficiency in removing the analyzed parameters, obtaining average removal in the synthetic effluent of 85 % of color and 100 % of phenol after 25 min of electrolysis. For the effluent from the textile factory, average reductions of 80 % of color, 91 % of turbidity, 100 % of phenol, 55 % of COD, and 73 % of TOC were measured after 60 min of electrolysis. The results obtained demonstrate the potential of using iron slag as an electrode in the electrocoagulation process in order to reuse industrial waste and reduce costs in the treatment and disposal of solid waste.

Download Full-text

Characterization and application of orange peel as an adsorbent for cationic dye removal from aqueous solution

Revista Eletrônica em Gestão Educação e Tecnologia Ambiental ◽

10.5902/2236117065271 ◽

2021 ◽

Vol 25 ◽

pp. e16

Author(s):

Aline Haas ◽

Eliane Pereira dos Santos

Keyword(s):

Methylene Blue ◽

Dye Removal ◽

Adsorption Process ◽

Solid Medium ◽

Orange Peel ◽

Freundlich Isotherm ◽

Adsorptive Capacity ◽

Blue Dye ◽

Maximum Adsorption Capacity ◽

Methylene Blue Dye

With the great generation of colored effluents, several methods for the removal of the color are used, being one of them the method of adsorption in solid medium. In this paper, the in natura orange peel was used as the alternative biomass for the adsorption process of methylene blue, which was characterized by moisture content, pH, apparent density, iodine number, and methylene blue index. To determine the adsorptive capacity of the methylene blue dye, pH 7 was obtained as favorable, the adsorption process showed an adsorption of 82% of the methylene blue dye and a 10 min equilibrium time, where the Freundlich isotherm presented a better adaptation to the adsorption process in orange peel, with its maximum adsorption capacity of 3.9630 mg g-1, for the methylene blue dye.

Download Full-text

STUDY OF THE ADSORPTION OF METHYLENE BLUE DYE IN CHITOSAN MICROSPHERES

Periódico Tchê Química ◽

10.52571/ptq.v12.n24.2015.28_p_24_pgs_28_34.pdf ◽

2015 ◽

Vol 12 (24) ◽

pp. 28-34

Author(s):

, Anna Karla dos Santos; ,, , PEREIRA ◽

Gessiel Newton SCHEIDT ◽

Lucas Samuel Soares SANTOS

Keyword(s):

Experimental Data ◽

Chemical Structure ◽

Blue Dye ◽

Maximum Adsorption Capacity ◽

Methylene Blue Dye ◽

Adsorption Model ◽

Adsorption Sites ◽

Pseudo Second Order ◽

Kinetics Of ◽

Hydrolysis Of

Chitosan is a polymer that can be used as adsorbent material. In this work, chitosan was synthesized via alkaline hydrolysis of chitin. The chemical structure was characterized by IR spectroscopy and the degree of deacetylation (% DG) of the acetamido groups present in the polymer matrix by neutralization titration. The most suitable adsorption model for analysis of experimental data was Langmuir. The maximum adsorption capacity of the microspheres (Ns) of chitosan was 3.36 x 10-6 mol g-1 adsorbent. The rate of adsorption is governed by the kinetics of the pseudo-second order, where the saturation of adsorption sites occurred after two hours of contact between the adsorbent and the adsorbate. By analyzing data across the isotherm model Dubinin-Radushkevich (DR) it was found that this process adsorption is physical in nature.

Download Full-text

Removal of textile dye by adsortion on the cake as solid waste from the press-extraction of the macaúba (Acrocomia aculeata) kernel oil

Eclética Química Journal ◽

10.26850/1678-4618eqj.v43.1.2018.p48-53 ◽

2018 ◽

Vol 43 (1) ◽

pp. 48 ◽

Cited By ~ 1

Author(s):

Alice Santos Caldeira ◽

José Domingos Fabris ◽

David Lee Nelson ◽

Sandra Matias Damasceno

Keyword(s):

Good Alternative ◽

Brilliant Blue ◽

Blue Dye ◽

Batch Adsorption ◽

Maximum Adsorption Capacity ◽

Textile Dye ◽

Freundlich Isotherms ◽

Kernel Oil ◽

The Press ◽

Acrocomia Aculeata

The textile industries face difficulties in removing dyes from the liquid effluent, even after what is thought to be conventional cleaning treatments. The use of adsorbents to retain dyes in textile effluents has been showing to be a simple and promisingly efficient method. The objective of this research was to test the macaúba (Acrocomia aculeata) kernel cake as adsorbent to remove Remazol Brilliant Blue dye in batch adsorption tests. The obtained adsorption kinetic data at equilibrium were modeled by assuming both the Langmuir and the Freundlich isotherms. The values were better fitted with the Langmuir model (R2 = 0.983), with a maximum adsorption capacity of 3.5 mg g-1 monolayer. This essay showed that the macaúba cake is an effective adsorbent to remove Remazol Brilliant Blue textile dye and it is a good alternative for treatment of textile liquid effluents.

Download Full-text

Phosphorus and nitrogen co-doped carbon derived from Cigarette Filter for adsorption of methylene blue dye from aqueous solution

10.21203/rs.3.rs-507326/v1 ◽

2021 ◽

Author(s):

Samantha Macchi ◽

Zane Alsebai ◽

Fumiya Watanabe ◽

Arooba Ilyas ◽

Shiraz Atif ◽

...

Keyword(s):

Water Pollution ◽

Methylene Blue ◽

Adsorption Capacity ◽

Blue Dye ◽

Batch Adsorption ◽

Maximum Adsorption Capacity ◽

Textile Dye ◽

Adsorption Parameters ◽

Cigarette Filter ◽

Co Doped

Download Full-text

Influence of phosphorus and nitrogen co-doping of activated carbon from littered cigarette filters for adsorption of methylene blue dye from wastewater

Sustainable Environment Research ◽

10.1186/s42834-021-00108-5 ◽

2021 ◽

Vol 31 (1) ◽

Author(s):

Samantha Macchi ◽

Zane Alsebai ◽

Fumiya Watanabe ◽

Arooba Ilyas ◽

Shiraz Atif ◽

...

Keyword(s):

Water Pollution ◽

Adsorption Capacity ◽

Adsorption Process ◽

Surface Characteristics ◽

Point Of Zero Charge ◽

Blue Dye ◽

Batch Adsorption ◽

Maximum Adsorption Capacity ◽

Textile Dye ◽

Co Doping

AbstractGlobal access to sanitary water is of utmost importance to human health. Presently, textile dye water pollution and cigarette pollution are both plaguing the environment. Herein, waste cigarette filters (CFs) are converted into useful carbon-based adsorbent materials via a facile, microwave-assisted carbonization procedure. The CFs are activated and co-doped with phosphorus and nitrogen simultaneously to enhance their surface characteristics and adsorbent capability by introducing chemisorptive binding sites to the surface. The doped carbonized CF (DCCF) and undoped carbonized CF (CCF) adsorbents are characterized physically to examine their surface area, elemental composition, and surface charge properties. The maximum adsorption capacity of synthesized adsorbents was determined via batch adsorption experiments and Langmuir modelling. Additionally, the influence of different parameters on the adsorption process was studied by varying the adsorption conditions such as adsorbent dosage, initial concentration, contact time, temperature, and pH. The DCCF adsorbent showed a maximum adsorption capacity of 303 mg g− 1. Adsorption of both adsorbents fit best to Langmuir model and pseudo-second order kinetics, indicating chemisorptive mechanism. Both adsorbents showed endothermic adsorption process which is indicated by increasing adsorption capacity with increased temperatures. DCCF exhibited greater adsorption capability than CCF at all temperatures from 25 to 55 °C. The pH of the solution significantly affected the adsorption capacity of CCF while DCCF adsorption is favorable at a wide pH range due to low value of the adsorbent’s point of zero charge. Reusability results showed that both adsorbents can be used over several cycles for removal of dye. Thus, results conclude that the waste DCCF-based adsorbent does not only show a profound potential as a sustainable solution to combat textile dye water pollution but also addresses the valuable use of the CF pollution simultaneously. This approach, which can target two major pollutants, is attractive due to its ease of preparation, negligible cost, and versatility in application.

Download Full-text

Utilization of Waste of Enzymes Biomass as Biosorbent for the Removal of Dyes from Aqueous Solution in Batch and Fluidized Bed Column

Revista de Chimie ◽

10.37358/rc.20.1.7804 ◽

2020 ◽

Vol 71 (1) ◽

pp. 1-12

Author(s):

Salman H. Abbas ◽

Younis M. Younis ◽

Mohammed K. Hussain ◽

Firas Hashim Kamar ◽

Gheorghe Nechifor ◽

...

Keyword(s):

Experimental Data ◽

Aqueous Solution ◽

Particle Size ◽

Adsorption Capacity ◽

Fluidized Bed ◽

Flow Rate ◽

Fungal Biomass ◽

Solution Flow Rate ◽

Maximum Adsorption Capacity ◽

Solution Flow

The biosorption performance of both batch and liquid-solid fluidized bed operations of dead fungal biomass type (Agaricusbisporus ) for removal of methylene blue from aqueous solution was investigated. In batch system, the adsorption capacity and removal efficiency of dead fungal biomass were evaluated. In fluidized bed system, the experiments were conducted to study the effects of important parameters such as particle size (701-1400�m), initial dye concentration(10-100 mg/L), bed depth (5-15 cm) and solution flow rate (5-20 ml/min) on breakthrough curves. In batch method, the experimental data was modeled using several models (Langmuir,Freundlich, Temkin and Dubinin-Radushkviechmodels) to study equilibrium isotherms, the experimental data followed Langmuir model and the results showed that the maximum adsorption capacity obtained was (28.90, 24.15, 21.23 mg/g) at mean particle size (0.786, 0.935, 1.280 mm) respectively. In Fluidized-bed method, the results show that the total ion uptake and the overall capacity will be decreased with increasing flow rate and increased with increasing initial concentrations, bed depth and decreasing particle size.

Download Full-text

The effect of the textile industry dye bath additive EDTMPA on colour removal characteristics by ozone oxidation

Water Science & Technology ◽

10.2166/wst.2007.317 ◽

2007 ◽

Vol 55 (10) ◽

pp. 145-153 ◽

Cited By ~ 12

Author(s):

T. Ölmez ◽

I. Kabdaşlı ◽

O. Tünay

Keyword(s):

Organic Matter ◽

Textile Industry ◽

Reaction Rates ◽

Textile Dye ◽

Pseudo First Order Reaction ◽

Ozone Oxidation ◽

Reactive Dyeing ◽

First Order ◽

Organic Matter Oxidation ◽

Pseudo First Order

In this study, the effects of the phosphonic acid based sequestering agent EDTMPA used in the textile dye baths on colour and organic matter removal by ozone oxidation was experimentally investigated. Procion Navy HEXL dyestuff that has been commonly used for the reactive dyeing of cellulose fibers was selected as the model component. The organic matter oxidation by ozone was determined to obey the pseudo-first order kinetics as they are treated singly or in combination. COD removal rates obtained from pseudo-first order reaction kinetics showed that oxidation of Navy HEXL alone (0.0947 L/min) was faster than that of EDTMPA (0.0171 L/min) and EDTMPA with dye (0.0155 L/min) at pH 3.0. It was also found that reaction rates of single EDTMPA removal and EDTMPA and dye mixture removal increased as the reaction pH was increased from 3.0 to 10.5.

Download Full-text

Application of biological activated carbon anaerobic reactor for treatment of hazardous chemicals

Water Science & Technology ◽

10.2166/wst.2006.360 ◽

2006 ◽

Vol 53 (11) ◽

pp. 251-260 ◽

Cited By ~ 13

Author(s):

H. Tsuno ◽

M. Kawamura ◽

T. Oya

Keyword(s):

Experimental Data ◽

Activated Carbon ◽

Organic Compounds ◽

Adsorptive Capacity ◽

Biological Degradation ◽

Hazardous Chemicals ◽

High Concentration ◽

Expanded Bed ◽

Biological Activated Carbon ◽

Anaerobic Reactor

An expanded-bed anaerobic reactor with granular activated carbon (GAC) medium has been developed to treat wastewaters that contain a high concentration of inhibitory and/or refractory organic compounds as well as readily degradable organic compounds. The process is characterised by a combination of two removal mechanisms; adsorption on GAC and biological degradation by microorganisms grown on GAC. Applicability of the reactor to treatment of phenol, chloroacetaldehyde (CAA), pentachlorophenol (PCP) and tetrachloroethylene (PCE) was discussed based on experimental data. All chemicals focused on here were removed well and stably at a removal efficiency of more than 98% even during starting operation and shock load operation. Chemicals in influent that exceeded biological degradation capacity was initially adsorbed on GAC and then gradually degraded, and hence the adsorptive capacity of GAC was regenerated biologically. These results proved that a biological activated carbon anaerobic reactor was effective for treatment of wastewater containing hazardous chemicals, especially for strongly absorbable chemicals, as well as readily degradable organic compounds at high concentration.

Download Full-text

Drying kinetics of ‘babassu’ mesocarp

Revista Brasileira de Engenharia Agrícola e Ambiental ◽

10.1590/1807-1929/agriambi.v21n10p709-714 ◽

2017 ◽

Vol 21 (10) ◽

pp. 709-714 ◽

Cited By ~ 1

Author(s):

Jhonatas C. Rosa ◽

Andreza P. Mendonça ◽

Angélica dos S. Oliveira ◽

Sylviane B. Ribeiro ◽

Andréia do R. Batista ◽

...

Keyword(s):

Experimental Data ◽

Water Content ◽

Animal Feed ◽

Coefficient Of Determination ◽

Residual Distribution ◽

Solar Dryer ◽

Error Standard Deviation ◽

Forced Air ◽

Final Water Content ◽

Best Fit

ABSTRACT ‘Babassu’ mesocarp flour has been used by the pharmaceutical, human food and animal feed industries. However, there is lack of standardization in the production, as well as absence of information on the management of the product’s quality. Thus, the objective of this study was to dry the ‘babassu’ mesocarp in forced-air oven and solar dryer, adjust different mathematical models to the experimental data, as well as to quantify the levels of proteins and crude fiber of the produced flour. The criteria for the adjustment were the coefficient of determination, magnitude of the mean relative error, standard deviation of estimate and the residual distribution trend. Drying in the shortest time occurred in oven at 60 °C (370 min), leading to water content of 4.62%, while in the solar dryer the final water content was 8.07% in 6 days. The mathematical model Two Terms showed the best fit to the experimental data for oven drying and the Midilli model showed the best fit in solar dryer. There was an increase in protein content with the drying in solar dryer and oven at 40, 50 and 60 °C (1.36, 1.33, 1.15 and 1.37%, respectively) in relation to fresh mesocarp (0.88%). Drying in both oven and solar dryer promoted increase of protein in the flour.

Download Full-text