Treatment of textile industry effluents using orange waste: a proposal to reduce color and chemical oxygen demand

2016 ◽  
Vol 74 (4) ◽  
pp. 994-1004 ◽  
Author(s):  
Carlos Eduardo de Farias Silva ◽  
Andreza Heloiza da Silva Gonçalves ◽  
Ana Karla de Souza Abud
Keyword(s):  
Chemical Oxygen Demand ◽  
Textile Industry ◽  
Adsorption Process ◽  
Low Cost ◽  
High Surface ◽  
High Surface Area ◽  
Dye Adsorption ◽  
Oxygen Demand ◽  
Textile Wastewater ◽  
Color Removal

Various agricultural residues have been tested as biosorbents due to their low cost, high surface area, and favorable surface chemistry. In this work, a sweet orange albedo was tested as a biosorbent for treatment of real textile effluents. The orange albedo powder was prepared by drying the residue at 50 °C and milling to 30 mesh, and then used for dye adsorption from a alkaline (pH = 10.71) effluent. The adsorption process was studied in batch experiments at 30 °C by measuring color removal and chemical oxygen demand (COD). The color removal was found not to be significantly altered when the effluent was used in its raw state, while COD increased probably due to albedo degradation. For the effluent diluted to 60% (Veffluent VH2O−1), color and COD removal percentages of approximately 89% were obtained. It was found that pH played a very significant role on the adsorption process, as the treated albedo displayed a relative pHPZC* of 4.61, and the highest dye removal efficiencies were reached at pH lower than 2. The COD was strongly influenced by the effluent dilution. The effectiveness in eliminating color and COD shows that orange albedo can be potentially used as a biosorbent to treat textile wastewater.

scholarly journals Development of a Novel Adsorbent Prepared from Dredging Sediment for Effective Removal of Dye in Aqueous Solutions

2021 ◽  
Vol 11 (22) ◽  
pp. 10722
Author(s):  
Abdelkader Ouakouak ◽  
Messameh Abdelhamid ◽  
Barhoumi Thouraya ◽  
Hadj-Otmane Chahinez ◽  
Grabi Hocine ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Adsorption Process ◽  
Low Cost ◽  
High Surface ◽  
High Surface Area ◽  
Dye Adsorption ◽  
Isotherm Models ◽  
Effective Removal ◽  
Water Media ◽  
A Minor

This study proposed a novel and low-cost adsorbent prepared from dredging sediment (DSD) for effective removal of dye in aqueous solutions. The adsorption efficiency and behavior of the DSD adsorbent toward the crystal violet (CV), a cationic dye, were investigated via batch experiments. The results showed that DSD samples contain mainly clay minerals (illite and kaolinite) and other mineral phases. In addition, DSD is a mesoporous material (Vmesopore = 94.4%), and it exhibits a relatively high surface area (~39.1 m2/g). Adsorption experiments showed that the solution’s pH slightly affects the adsorption process, and a pH of 11 gave a maximum capacity of 27.2 mg/g. The kinetic data of CV dye adsorption is well described by the pseudo–second-order and the Avrami models. The Langmuir and Liu isotherm models provide the best fit for the adsorption equilibrium data. The monolayer adsorption capacity of Langmuir reached 183.6, 198.0, and 243.6 mg/g at 293, 308, and 323 K, respectively. It was also found that the adsorption process was spontaneous (−ΔG°), exothermic (−∆H°), and increased the randomness (+∆S°) during the adsorption operation. The primary mechanisms in CV dye adsorption were ion exchange and pore filling, whereas electrostatic attraction was a minor contribution. In addition, three steps involving intraparticle diffusion occur at the same time to control the adsorption process. The results of this study highlight the excellent efficiency of DSD material as an ecofriendly sorbent for toxic dyes from water media.

scholarly journals Low-Cost Single Chamber MFC Integrated With Novel Lignin-Based Carbon Fiber Felt Bioanode for Treatment of Recalcitrant Azo Dye

2021 ◽  
Vol 9 ◽  
Author(s):  
Masoom Fatima ◽  
Yohannes Kiros ◽  
Robina Farooq ◽  
Rakel W. Lindström
Keyword(s):  
Carbon Fiber ◽  
Chemical Oxygen Demand ◽  
Low Cost ◽  
Oxygen Demand ◽  
Operation Time ◽  
Side Reaction ◽  
Textile Wastewater ◽  
Geobacter Sulfurreducens ◽  
Efficient Treatment ◽  
Carbon Fiber Felt

A flow through anaerobic microbial fuel cell (MFC) was designed and optimized for efficient treatment of recalcitrant textile wastewater. The membrane-less MFC was first time fabricated with a unique combination of electrodes, a novel bioanode of synthesized lignin-based electrospun carbon fiber supporting a biofilm of Geobacter sulfurreducens for acetate oxidation and an air-breathing cathode, consisting of a pyrolyzed macrocycle catalyst mixture on carbon bonded by polytetrafluoroethylene (PTFE). The effects of different organic loadings of acetate along with Acid Orange (AO5), operation time and ionic strength of auxiliary salts (conductivity enhancers) were investigated and responses in terms of polarization and degradation were studied. In addition, the decomposition of the organic species and the degradation of AO5 along with its metabolites and degraded products (2-aminobenzenesulfonic acid) were determined by chemical oxygen demand (COD) analysis, UV-Vis spectrophotometry and high-performance liquid chromatography (UV-HPLC) techniques. SEM and TEM images were also used to find out the biocompatibility of the microbes on lignin-based electrospun carbon felt anode and the morphology of the cathode. Reduction and breakage of the azo bond of AO5 occurs presumably as a side reaction, resulting in the formation of 2-aminobenzenesulfonic acid and unidentified aromatic amines. Maximum current density of anode 0.59 Am−2 and power density of 0.12 Wm−2 were obtained under optimized conditions. As a result, decolouration of AO5 and chemical oxygen demand (COD) removal efficiency was 81 and 58%, respectively. These results revealed that the low-cost MFC assembly can offer significant potential for anaerobic decolouration of recalcitrant textile wastewater.

scholarly journals Lignin Based Activated Carbon Using H3PO4 Activation

Polymers ◽  
2020 ◽  
Vol 12 (12) ◽  
pp. 2829
Author(s):  
Zhongzhi Yang ◽  
Roland Gleisner ◽  
Doreen H. Mann ◽  
Junming Xu ◽  
Jianchun Jiang ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Surface Area ◽  
Low Cost ◽  
High Surface ◽  
High Surface Area ◽  
Dye Adsorption ◽  
Nitrogen Adsorption ◽  
Bet Surface Area ◽  
Surface Areas ◽  
Adsorption Desorption

Activated carbon (AC) with a very high surface area of over 2000 m2/g was produced from low sulfur acid hydrotropic lignin (AHL) from poplar wood using H3PO4 at a moderate temperature of 450 °C (AHL-AC6). ACs with similar surface areas were also obtained under the same activation condition from commercial hardwood alkali lignin and lignosulfonate. Initial evaluation of AC performance was carried out using nitrogen adsorption-desorption and dye adsorption. AHL-AC6 exhibited the best specific surface area and dye adsorption performance. Furthermore, the adsorption results of congo red (CR) and methylene blue (MB) showed AHL-AC6 had greater adsorption capacity than those reported in literature. The dye adsorption data fit to the Langmuir model well. The fitting parameter suggests the adsorption is nearly strong and near irreversible, especially for MB. The present study for the first time provided a procedure for producing AC from lignin with Brunauer–Emmett–Teller (BET) surface area >2000 m2/g using low cost and low environmental impact H3PO4 at moderate temperatures.

scholarly journals Color removal from textile wastewater using date seeds activated carbon

2017 ◽  
Vol 52 (1) ◽  
pp. 31-42
Author(s):  
MA Rahman ◽  
T Ahmed ◽  
IN Salehin ◽  
MD Hossain
Keyword(s):  
Activated Carbon ◽  
Adsorption Process ◽  
Dominant Role ◽  
Low Cost ◽  
Diffusion Mechanism ◽  
Textile Wastewater ◽  
Color Removal ◽  
Batch Adsorption ◽  
Order Kinetic ◽  
Removal Mechanism

Powdered Activated carbon (PAC) developed from date seeds was used as an adsorbent for the removal of color from textile wastewater. Batch adsorption experiments were performed in the laboratory with varying process parameters (temperature, pH, agitation, adsorbent dosage, particle size) over a range of contact periods and wastewater pollutant (color) levels. It was found that the removal mechanism could be better characterized by the Freundlich adsorption isotherm model compared to the Langmuir model. Also, The Lagergren's pseudo 2nd order kinetic model fitted relatively well ( = 0.99) over the selected range of contact times (5-60 minutes) and initial color concentrations (800-1200 Pt-Co unit) compared to the pseudo-first order model indicating that chemisorption may be playing a dominant role in the adsorption process. Both external film and intra-particle pore diffusion mechanism were involved in the adsorption process but film diffusion was found to be rate limiting. While analyzing the thermodynamics, the negative value of free energy (-1.83 to -3.4 KJ/mole), positive value of enthalpy (0.26 to 0.28 KJ/mole) and entropy (0.97 to 1.01 J/K/Mole) associated with the color removal mechanism indicated that adsorption was spontaneous and endothermic with increased disorder and randomness at the solid-liquid interface of the date seeds PAC. These experiments suggests that date seeds PAC is a very effective adsorbent, capable of removing a significant amount of color from industrial wastewater if process variables can be optimized and can be explored as a potential low-cost alternative to expensive tertiary treatment options.Bangladesh J. Sci. Ind. Res. 52(1), 31-42, 2017

scholarly journals Synthesis of catalysts with fine platinum particles supported by high-surface-area activated carbons and optimization of their catalytic activities for polymer electrolyte fuel cells

RSC Advances ◽  
2021 ◽  
Vol 11 (33) ◽  
pp. 20601-20611
Author(s):  
Md. Mijanur Rahman ◽  
Kenta Inaba ◽  
Garavdorj Batnyagt ◽  
Masato Saikawa ◽  
Yoshiki Kato ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Polymer Electrolyte ◽  
High Performance ◽  
Activated Carbons ◽  
Low Cost ◽  
High Surface ◽  
High Surface Area ◽  
Polymer Electrolyte Fuel Cells ◽  
Supported Platinum ◽  
Platinum Particles

Herein, we demonstrated that carbon-supported platinum (Pt/C) is a low-cost and high-performance electrocatalyst for polymer electrolyte fuel cells (PEFCs).

scholarly journals Effects of Annealing Temperature on the Oxygen Evolution Reaction Activity of Copper–Cobalt Oxide Nanosheets

Nanomaterials ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 657
Author(s):  
Geul Han Kim ◽  
Yoo Sei Park ◽  
Juchan Yang ◽  
Myeong Je Jang ◽  
Jaehoon Jeong ◽  
...  
Keyword(s):  
High Activity ◽  
Cobalt Oxide ◽  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Low Cost ◽  
High Surface ◽  
High Surface Area ◽  
Cobalt Hydroxide ◽  
Ni Foam ◽  
Electron Conduction

Developing high performance, highly stable, and low-cost electrodes for the oxygen evolution reaction (OER) is challenging in water electrolysis technology. However, Ir- and Ru-based OER catalysts with high OER efficiency are difficult to commercialize as precious metal-based catalysts. Therefore, the study of OER catalysts, which are replaced by non-precious metals and have high activity and stability, are necessary. In this study, a copper–cobalt oxide nanosheet (CCO) electrode was synthesized by the electrodeposition of copper–cobalt hydroxide (CCOH) on Ni foam followed by annealing. The CCOH was annealed at various temperatures, and the structure changed to that of CCO at temperatures above 250 °C. In addition, it was observed that the nanosheets agglomerated when annealed at 300 °C. The CCO electrode annealed at 250 °C had a high surface area and efficient electron conduction pathways as a result of the direct growth on the Ni foam. Thus, the prepared CCO electrode exhibited enhanced OER activity (1.6 V at 261 mA/cm2) compared to those of CCOH (1.6 V at 144 mA/cm2), Co3O4 (1.6 V at 39 mA/cm2), and commercial IrO2 (1.6 V at 14 mA/cm2) electrodes. The optimized catalyst also showed high activity and stability under high pH conditions, demonstrating its potential as a low cost, highly efficient OER electrode material.

Fabricate Dye-Sensitized Solar Cell with Electrospining

2011 ◽  
Vol 335-336 ◽  
pp. 1117-1120
Author(s):  
Yun Yun Chu ◽  
Yu Chou Chao
Keyword(s):  
Solar Cell ◽  
Electron Transport ◽  
High Surface ◽  
High Surface Area ◽  
Dye Adsorption ◽  
Dye Sensitized Solar Cell ◽  
High Electron ◽  
Solar Cell Performance ◽  
Dye Sensitized ◽  
Viable Method

Dye adsorption on Ti02and electron transport in Ti02film are the two critical factors in determining efficiency of the the dye sensitized solar cell (DSSC). Increasing dye adsorption which increases the light harvesting is usually achieved by using nanoporous or nanoparticle Ti02films. Electron transport is determined by the inter-particle resistance of Ti02film. Electrospinning is a viable method for forming porous structure materials with high surface area. In this study, it was found that electrospinning is able to achieve good solar cell performance due to the high electron transport caused by the pores in the Ti02film.

Facile and large-scale synthesis of poly(m-phenylenediamine) nanobelts with high surface area and superior dye adsorption ability

RSC Advances ◽  
2014 ◽  
Vol 4 (85) ◽  
pp. 45244-45250 ◽  
Author(s):  
Yun Meng ◽  
Liyuan Zhang ◽  
Liyuan Chai ◽  
Wanting Yu ◽  
Ting Wang ◽  
...  
Keyword(s):  
Surface Area ◽  
Large Scale ◽  
High Surface ◽  
High Surface Area ◽  
Dye Adsorption ◽  
High Adsorption ◽  
Adsorption Ability ◽  
Adsorption Performance ◽  
Large Scale Synthesis

PmPD nanobelts with high adsorption performance have been synthesized by using CTAP as oxidants.

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