scholarly journals Decolorization of a textile vat dye by adsorption on waste ash

2010 ◽  
Vol 75 (6) ◽  
pp. 855-872 ◽  
Author(s):  
Miodrag Smelcerovic ◽  
Dragan Djordjevic ◽  
Mile Novakovic ◽  
Mirjana Mizdrakovic
Keyword(s):  
Waste Water ◽  
Textile Industry ◽  
Low Cost ◽  
Langmuir Model ◽  
Order Kinetic ◽  
Dyeing Process ◽  
Vat Dye ◽  
As Adsorption ◽  
Heating Station ◽  
Physical And Chemical

An adsorption process using cheap adsorbents could be described as a simple, selective and low cost alternative for the treatment of colored waste water compared to conventional physical and chemical processes. In this study the use of a natural waste adsorbent - ash was investigated for the removal of a textile vat dye Ostanthren Blue GCD remaining after the dyeing of cotton textile. The ash obtained as a waste material during the burning of brown coal in the heating station of Leskovac (Serbia) was used for the treatment of waste waters from the textile industry, i.e., waste water after the dyeing process. The effect of ash quantity, initial dye concentration, pH and agitation time on adsorption was studied. The Langmuir model was used to describe the adsorption isotherm. Based on the analytical expression of the Langmuir model, the adsorption constants, such as adsorption capacity and adsorption energy, were found. Pseudo first and second order kinetic models were studied to evaluate the kinetic data.

scholarly journals SIMULTANEOUS ADSORPTION OF TETRACYCLINE AND AMOXICILLIN BY CLADOPHORA AND SPIRULINA ALGAE BIOMASS

2021 ◽  
Vol 52 (5) ◽  
pp. 1290-1303
Author(s):  
I. N. Abd ◽  
M. J. Mohammed-Ridha
Keyword(s):  
Low Cost ◽  
Agitation Speed ◽  
Langmuir Model ◽  
Coefficient Of Determination ◽  
Isotherm Models ◽  
Order Kinetic ◽  
Batch Mode ◽  
Algae Biomass ◽  
Initial Ph ◽  
Biomass Dosage

Adsorption studies were performed at different initial Tetracycline (TC) and Amoxicillin (AMO) concentration, different biomass dosage and type, contact time, agitation speed, and initial pH.  In the batch mode were investigated. The optimum pH of solutions is 6.5 for TC and 5 for AMO, agitation speed 200 rpm and concentration 50 ppm. The results in FTIR showed that there were -OH and amides (N-H) and other functional groups on the surface of Cladophora and Spirulina algae. The equilibrium isotherm data were modeled with Freundlich, Temkin, and Langmuir isotherm models. The data best fitted with the Langmuir model. The maximal adsorption capacity from the Langmuir model was (9.86, 20. 5 mg/g) for TC and (7.89, 17.4 mg/g) for AMO on Cladophora and Spirulina algae, respectively. Finally, the pseudo-second-order kinetic model was best fitted the experimental kinetic data of TC and AMO onto Cladophora and Spirulina algae biomass with a high coefficient of determination between 0.97 and 0.99.    Cladophora and Spirulina algae, low-cost and eco-friendly adsorbents, can be used to adsorb the TC and AMO from the solution.

Aqueous extraction of buckwheat hull and its functional application in eco-friendly dyeing for wool fabric

2019 ◽  
Vol 90 (5-6) ◽  
pp. 641-654 ◽  
Author(s):  
Wei Zhang ◽  
Jiming Yao ◽  
Peng Huang ◽  
Shuai Xing
Keyword(s):  
Textile Industry ◽  
Langmuir Model ◽  
Uv Protection ◽  
Wool Fabric ◽  
Synthetic Dyes ◽  
Dyeing Process ◽  
Wool Fabrics ◽  
Monolayer Adsorption ◽  
Reduction Stability ◽  
Agricultural Byproduct

As a cheap and abundant agricultural byproduct, buckwheat hull is expected to be applied in many fields such as textile, biotechnology, and medicine. In this paper, the physicochemical properties of buckwheat hull extraction (BHE) and its dyeing abilities for wool fabric with different eco-friendly mordants and methods were studied. The theoretical process, colorfastness, and UV-protection properties of the dyed wool fabric with BHE were investigated. The results showed that BHE solution had good thermal and reduction stability. The dyeing process of BHE on wool was in accordance with the Langmuir model and had uniform monolayer adsorption. Wool fabrics dyed directly or through a mordanting process demonstrated good washing colorfastness and acceptable crocking- and light colorfastness. The dyed wool fabrics with KAl2+ and meta-mordanting showed excellent UV-protection as well as exceptional antibacterial activity against Escherichia coli. Therefore, BHE presents a novel alternative for some synthetic dyes that are applied in the textile industry.

scholarly journals Facial Synthesis of Adsorbent from Hemicelluloses for Cr(VI) Adsorption

Molecules ◽  
2021 ◽  
Vol 26 (5) ◽  
pp. 1443
Author(s):  
Yi Wei ◽  
Wei Chen ◽  
Chuanfu Liu ◽  
Huihui Wang
Keyword(s):  
Waste Water ◽  
Water Treatment ◽  
Adsorption Capacity ◽  
Low Cost ◽  
Waste Water Treatment ◽  
Ammonia Solution ◽  
Langmuir Model ◽  
Raw Material ◽  
Maximum Adsorption Capacity ◽  
Chemical Fiber

It is challenging work to develop a low-cost, efficient, and environmentally friendly Cr(VI) adsorbent for waste water treatment. In this paper, we used hemicelluloses from chemical fiber factory waste as the raw material, and prepared two kinds of carbon materials by the green hydrothermal method as adsorbent for Cr(VI). The results showed that hemicelluloses hydrothermally treated with citric acid (HTC) presented spherical shapes, and hemicelluloses hydrothermally treated with ammonia solution (HTC-NH2) provided spongy structures. The adsorption capacity of the samples can be obtained by the Langmuir model, and the adsorption kinetics could be described by the pseudo-second-order model at pH 1.0. The maximum adsorption capacity of HTC-NH2 in the Langmuir model is 74.60 mg/g, much higher than that of HTC (61.25 mg/g). The green hydrothermal treatment of biomass with ammonia solution will provide a simple and feasible way to prepare adsorbent for Cr(VI) in waste water treatment.

Low – cost multilayered green fiber for the treatment of textile industry waste water

2019 ◽  
Vol 365 ◽  
pp. 297-305 ◽  
Author(s):  
Mary Lidiya Mathew ◽  
Akhil Gopalakrishnan ◽  
Charuvila T. Aravindakumar ◽  
Usha K. Aravind
Keyword(s):  
Waste Water ◽  
Textile Industry ◽  
Low Cost ◽  
Industry Waste

scholarly journals Reactive dyes adsorption via Citrus hystrix peel powder and Zea mays cob powder: characterization, isotherm and kinetic studies

2019 ◽  
Vol 10 (1) ◽  
pp. 4803-4810
Keyword(s):  
Zea Mays ◽  
Low Cost ◽  
Freundlich Isotherm ◽  
Kinetic Studies ◽  
Order Kinetic ◽  
Lime Peel ◽  
Dyes Adsorption ◽  
Reactive Red 2 ◽  
Physical And Chemical ◽  
Solution Acidity

Adsorption is one of the generally used treatment methods due to the low-cost, high removal effect and simple design The aim of the study was to investigate the adsorption efficiency of lignocellulosic waste such as lime peel (Citrus hystrix) and CC (Zea mays) for removal of Reactive Violet 5 (RV5) and Reactive Red 2 (RR2) dyes. The physical and chemical characteristics of the adsorbents were analyses by using Fourier transform infrared (FTIR) and scanning electron microscopy (SEM). Additionally, the solution acidity, adsorbent mass, duration of adsorption, and dye concentration were evaluated with isotherm and kinetic study to determine the mechanism of adsorption. The removal of RV5 for lime peel and CC achieved to 50 % and 48 % while the removal of RR2 for lime peel and CC reached 53 % and 46 %. The highest adsorption capacity for both adsorbents was 4.29 mg/g and 6.14 mg/g. In terms of physical characteristics, the adsorbent had large surface area that adsorbs more dyes in same amount of dye concentration. The results showed that Freundlich isotherm and Pseudo-first-order kinetic models were best fitted to the adsorption process with R2 value of 0.9974 and R2 value of 0.9919.

scholarly journals LOW-COST DOMESTIC WASTE WATER TREATMENT AND ANALYSIS

2021 ◽  
Vol 6 (4) ◽  
Author(s):  
Rasika G. Pande ◽  
Sayali R. Pardeshi ◽  
Alte P.D. ◽  
Mayur R Choudhari ◽  
Shweta V. Bawaskar ◽  
...  
Keyword(s):  
Waste Water ◽  
Water Treatment ◽  
Low Cost ◽  
Waste Water Treatment ◽  
Treatment System ◽  
Domestic Waste ◽  
Water Treatment System ◽  
Treated Water ◽  
Chemical Impurities ◽  
Physical And Chemical

The motive of this paper to prepare some systematic low-priced and sustainable domestic waste water treatment system for household. To acquire this objective we collected samples from the household kitchen sink, basin, laundry etc. From the conclusion we learned that the tested parameters like BOD, COD, TDS, etc. displayed high removal of physical and chemical impurities. The treated water can be used for purposes such as irrigation, car washing, Flushing, etc.

Surface interaction of sweet potato peels (Ipomoea batata) with Cd(II) and Pb(II) ions in aqueous medium

2019 ◽  
Author(s):  
Chem Int
Keyword(s):  
Aqueous Medium ◽  
Sweet Potato ◽  
Adsorption Process ◽  
Low Cost ◽  
Correlation Coefficients ◽  
Order Kinetic ◽  
Thermodynamic Evaluation ◽  
Dissociative Mechanism ◽  
Pseudo Second Order ◽  
Potato Peels

The removal of Cd(II) and Pb(II) ions from aqueous medium was studied using potato peels biomass. The adsorption process was evaluated using Atomic Absorption Spectrophotometer (AAS). The Vibrational band of the potato peels was studied using Fourier Transform Infrared Spectroscopy (FTIR). The adsorption process was carried out with respect to concentration, time, pH, particle size and the thermodynamic evaluation of the process was carried at temperatures of 30, 40, 50 and 60(0C), respectively. The FTIR studies revealed that the potato peels was composed of –OH, -NH, –C=N, –C=C and –C-O-C functional groups. The optimum removal was obtained at pH 8 and contact time of 20 min. The adsorption process followed Freundlich adsorption and pseudo second-order kinetic models with correlation coefficients (R2) greater than 0.900. The equilibrium adsorption capacity showed that Pb(II) ion was more adsorbed on the surface of the potato peels biomass versus Cd (II) ion (200.91 mg/g > 125.00 mg/g). The thermodynamic studies indicated endothermic, dissociative mechanism and spontaneous adsorption process. This study shows that sweet potato peels is useful as a low-cost adsorbent for the removal of Cd(II) and Pb(II) ions from aqueous medium.

Chitosan-based Magnetic Composites - Efficient Adsorbents for Removal of Pb(II) and Cu(II) from Aqueous Mono and Bicomponent Solutions

2018 ◽  
Vol 69 (9) ◽  
pp. 2323-2330 ◽  
Author(s):  
Daniela C. Culita ◽  
Claudia Maria Simonescu ◽  
Rodica Elena Patescu ◽  
Nicolae Stanica
Keyword(s):  
Aqueous Solutions ◽  
Metal Ions ◽  
Chemical Properties ◽  
Order Kinetic ◽  
Mass Ratio ◽  
Magnetic Adsorbent ◽  
Magnetic Composites ◽  
Initial Ph ◽  
Order Kinetic Model ◽  
Physical And Chemical

A series of three chitosan-based magnetic composites was prepared through a simple coprecipitation method. It was investigated the influence of mass ratio between chitosan and magnetite on the physical and chemical properties of the composites in order to establish the optimum conditions for obtaining a composite with good adsorption capacity for Pb(II) and Cu(II) from mono and bicomponent aqueous solutions. It was found that the microspheres prepared using mass ratio chitosan / magnetite 1.25/1, having a saturation magnetization of 15 emu g--1, are the best to be used as adsorbent for the metal ions. The influence of different parameters such as initial pH values, contact time, initial concentration of metal ions, on the adsorption of Pb(II) and Cu(II) onto the chitosan-based magnetic adsorbent was investigated in details. The adsorption process fits the pseudo-second-order kinetic model in both mono and bicomponent systems, and the maximum adsorption capacities calculated on the basis of the Langmuir model were 79.4 mg g--1 for Pb(II) and 48.5 mg g--1 for Cu(II) in monocomponent systems, while in bicomponent systems were 88.3 and 49.5 mg g--1, respectively. The results revealed that the as prepared chitosan-based magnetic adsorbent can be an effective and promising adsorbent for Pb(II) and Cu(II) from mono and bicomponent aqueous solutions.

Modelling of bacterial removal in wastewater storage reservoir for irrigation purposes: a case study in Sicily, Italy

2003 ◽  
Vol 3 (4) ◽  
pp. 169-175 ◽  
Author(s):  
S. Barbagallo ◽  
F. Brissaud ◽  
G.L. Cirelli ◽  
S. Consoli ◽  
P. Xu
Keyword(s):  
Municipal Wastewater ◽  
High Reliability ◽  
Low Cost ◽  
Public Awareness ◽  
Storage System ◽  
Wastewater Reuse ◽  
Order Kinetic ◽  
Aquifer Recharge ◽  
Mediterranean Countries ◽  
Storage Reservoirs

In arid and semiarid regions the reclamation and reuse of municipal wastewater can play a strategic role in alleviating water resources shortages. Public awareness is growing about the need to recycle and reuse water for increasing supply availability. Many wastewater reuse projects have been put in operation in European and Mediterranean countries adopting extensive treatment systems such as aquifer recharge, lagooning, constructed wetlands, and storage reservoirs, mainly for landscape and agricultural irrigation. In agricultural reuse systems, there is an increasing interest in extensive technologies because of their high reliability, and easy and low cost operation and maintenance. Wastewater storage reservoirs have become the option selected in many countries because of the advantages they present in comparison with other treatment alternatives, namely the coupling of two purposes, stabilization and seasonal regulation. This paper describes an example of a wastewater storage system, built in Caltagirone (Sicily, Italy). The storage results in a tertiary treatment of a continuous inlet flow of activated sludge effluents. The prediction of the microbiological water quality has been evaluated by means of a non-steady-state first-order kinetic model. Single and multiple regressions were applied to determine the main variables that most significantly affected die-off coefficients. The proposed model has been calibrated using the results of a field monitoring carried out during a period from March to October 2000.

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