Effect of Cu Dopant on ZnO Photocatalyst in the Degradation of Navy Blue Textile Dye from Synthetic Wastewater

2021 ◽  
Author(s):  
Kumaran Vetriselvan ◽  
V.R Reshmawhahini ◽  
P Gomathipriya
Keyword(s):  
Synthetic Wastewater ◽  
Textile Dye ◽  
Cu Dopant

scholarly journals Screening the six plant species for phytoremediation of synthetic textile dye waste water

2020 ◽  
Author(s):  
Navjeet Kaur ◽  
Jyotsna Kaushal ◽  
Pooja Mahajan ◽  
Arun Lal Srivas
Keyword(s):  
Plant Species ◽  
Synthetic Wastewater ◽  
Contaminated Sites ◽  
Textile Dye ◽  
Dye Wastewater ◽  
Active Growth ◽  
Synthetic Dye ◽  
Hibiscus Rosa Sinensis ◽  
Chrysanthemum Indicum ◽  
Tagetes Erecta L

Abstract Most of the dyes are carcinogenic and mutagenic in nature. Plants are potential candidates to remediate textile dye wastewater from contaminated sites. The present study aimed toscreen potential plant species for removal of synthetic dye solution of triarylmethane dye Methylene Blue (MB) and diazo dye Congo Red (CR). Six plant species were screened for their phytoremediation ability for the removal of dyes present in synthetic wastewater. Six plants selected for screening areTrachyspermum ammi L. (T. ammi), Tagetes erecta L. (T. erecta), Hibiscus rosa-sinensis L. (H. rosa- sinensis), Chrysanthemum indicum L. (C. indicum), Bryophyllum fedtschenkoi (B. fedtschenkoi), Catharanthus roseus L. (C. roseus). The phytotreatment of dyes was done up to 40 hfortwo different concentrations of dyes 10 mg L− 1 and 20 mg L− 1. Among these plants, the maximum decolouration was obtained from T. ammi plant followed by B. fedtschenkoi plant. Both of these plants showed active growth even after the phytoremediation process. T. ammi decolourised the MB dye 99% (10 mg L− 1) and 86% (20 mg L− 1) while the decolourisation of the CR dye solution was up to 95% (10 mg L− 1) and 84% (20 mg L− 1).T. ammi found to have maximum potential among screened plants for the removal of MB and CR dye from synthetic dye solution and can be used for decolouration of synthetic dye wastewater.

scholarly journals Utilization of egg-shell, a locally available biowaste material, for adsorptive removal of congo red from aqueous solution

2020 ◽  
Vol 9 (2) ◽  
pp. 63-74
Author(s):  
Shahanaz Parvin ◽  
Al- Mamun ◽  
Md. Fazle Rubbi ◽  
Md. Abdur Ruman ◽  
Md. Moshiur Rahman ◽  
...  
Keyword(s):  
Surface Morphology ◽  
Congo Red ◽  
Sorption Process ◽  
Synthetic Wastewater ◽  
Textile Dye ◽  
Order Kinetic ◽  
Adsorption Model ◽  
Solution Ph ◽  
Sem Images ◽  
Egg Shell

Egg-shell, a locally obtainable biowaste material, was successfully used for common textile dye (congo red) removal from synthetic wastewater solution. All adsorptive experiments were carried out in a batch method. Experiments were conducted to understand the consequence of different functioning parameters, for example, the pH of the solution, adsorbent dosage, reaction time, and initial adsorbate concentration. The surface morphology of the egg-shell was analyzed by scanning electron microscopy (SEM) images of the adsorbent (before as well as after adsorption) showed that there was a change in surface morphology, which ensured the congo red adsorption on the adsorbent surface. The adsorbent dose was determined to be 1g as optimum value, while the solution pH 5 was seemingly the best operating pH at the tested conditions. Complete adsorption was achieved in 120 min while the pseudo-second-order kinetic model portrayed the sorption kinetics quite nicely. Langmuir adsorption model (monolayer adsorption) was the best-suited model for describing the sorption process in the concern of the correlation coefficient. The values of dimensionless separation parameters (RL) signified that the adsorption process was promising for all studied concentrations. A considerably great extent of sorption capacity (153.85 mg/g) of egg-shell adsorbent indicated that it could be employed for wastewater treatment in textile and related industries

Partial oxidation of reactive dyestuffs and synthetic textile dye-bath by the O3 and O3/H2O2 processes

2001 ◽  
Vol 43 (2) ◽  
pp. 221-228 ◽  
Author(s):  
I. A. Balcioğlu ◽  
İ. Arslan
Keyword(s):  
Treatment Time ◽  
Textile Wastewater ◽  
Synthetic Wastewater ◽  
Textile Dye ◽  
Treatment Efficiency ◽  
Reactive Dyeing ◽  
Oxidation Rates ◽  
Ph Values ◽  
Dyeing Process ◽  
H2o2 Oxidation

Ozonation and O3/H2O2 oxidation of reactive dyestuffs and simulated textile dye-bath were investigated. Effects of reaction pH, initial dye concentration, H2O2 concentration and assisting chemicals on treatment efficiency were examined. We found considerable improvement in COD and colour removal rates at pH=11, that was almost the actual pH of the prepared textile wastewater, whereas in particular increasing the initial dyestuff concentration had an adverse effect upon oxidation rates. Removal of colour, COD and TOC were found to be fairly sensitive to the introduction of soda that is frequently applied as an auxiliary chemical during the reactive dyeing process. The addition of H2O2 had negligible effect on COD removal efficiency and decolorization rate compared to ozonation alone at different pH values. Accordingly it can be inferred that the theoretically expected effect of OH· radical scavengers (e.g. carbonate, chloride) present in the synthetic dye-bath as well as introduced radical formationpromoters (e.g. H2O22, OH–) were probably hidden due to the complexity of the synthetic wastewater matrix. Biodegradability of the ozonated dye-bath was accelerated by a factor of three corresponding to a 233% relative enhancement. The inhibition of the oxygen uptake rate decreased from 91% to 75% within only 5 min treatment time.

Removal of textile dye from synthetic wastewater using microporous polymer nanocomposite

2021 ◽  
Vol 44 (4) ◽  
Author(s):  
Mohammed R Chandan ◽  
Sparsh Goyal ◽  
Mohammed Rizwan ◽  
Mohd Imran ◽  
Aabid Hussain Shaik
Keyword(s):  
Polymer Nanocomposite ◽  
Synthetic Wastewater ◽  
Textile Dye ◽  
Microporous Polymer

Biomolecules encapsulated TiO 2 nano‐cubes using Tinospora cordifolia for photodegradation of a textile dye

2019 ◽  
Vol 14 (12) ◽  
pp. 1229-1232 ◽  
Author(s):  
Harpreet Kaur ◽  
Vikas Goyal ◽  
Jagpreet Singh ◽  
Sanjeev Kumar ◽  
Mohit Rawat
Keyword(s):  
Tinospora Cordifolia ◽  
Textile Dye

Removal of lead by sulfate-reducing bacteria in anaerobic continuous stirred tank reactors

2016 ◽  
Vol 14 (3) ◽  
pp. 557-561
Author(s):  
Nguyễn Thị Yên ◽  
Kiều Thị Quỳnh Hoa
Keyword(s):  
Sulfate Reducing Bacteria ◽  
Stirred Tank ◽  
Synthetic Wastewater ◽  
Terminal Electron Acceptor ◽  
Stirred Tank Reactors ◽  
Sulfate Reducing ◽  
Sulfide Production ◽  
Continuous Stirred Tank ◽  
Continuous Stirred Tank Reactors ◽  
Reducing Bacteria

Lead contaminated wastewater negatively impacts to living organisms as well as humans. In recent years, a highly promising biological process using the anaerobic production of sulfide ions by sulfate-reducing bacteria has presented itself as an alternative option for the removal of lead. This process is based on microbial utilization of electron donors, such as organic compounds (carbon sources), and sulfate as the terminal electron acceptor for sulfide production. The biogenic hydrogen sulfide reacts with dissolved heavy metals to form insoluble metal sulfide precipitates Removal of lead by an enriched consortium of sulfate-reducing bacteria (DM10) was evaluated sulfate reduction, sulfide production and lead precipitation. Four parallel anaerobic continuous stirred tank reactors (CSTR, V = 2L) (referred as R1 - R4) were fed with synthetic wastewater containing Pb2+ in the concentrations of 0, 100, 150 and 200 mg L-1 of lead and operated with a hydraulic retention time of 5 days for 40 days. The loading rates of each metal in R1- R4 were 0, 20, 30 and 40 mg L-1 d-1, respectively. The results showed that there was no inhibition of SRB growth and that lead removal efficiencies of 99-100% for Pb2+ were achieved in R2 (100 mg L-1) and R3 (150 mg L-1) throughout the experiment. For the highest lead concentration of  200 mg L-1, a decrease in efficiency of removal (from 100 to 96%) was observed at the end of the experiment. The obtained result of this study might help for a better control operation and performance improvements of reactors.

OPTIMIZATION OF ISES FOR SIMULTANEOUS NH4+, NO3 AND NO2 MONITORING IN SYNTHETIC WASTEWATER USING SOLVER

2015 ◽  
Vol 14 (3) ◽  
pp. 681-688
Author(s):  
Milan Sak-Bosnar ◽  
Natalija Velic ◽  
Olivera Galovic ◽  
Tonci Rezic ◽  
Bozidar Santek ◽  
...  
Keyword(s):  
Synthetic Wastewater

OPTIMIZATION OF PHOSPHATE REMOVAL FROM SYNTHETIC WASTEWATER BY BACTERIAL CONSORTIUM USING BOX-BEHNKEN DESIGN

2013 ◽  
Vol 12 (12) ◽  
pp. 2371-2383
Author(s):  
Krishnaswamy Usharani ◽  
Perumalsamy Lakshmanaperumalsamy ◽  
Muthusamy Muthukumar
Keyword(s):  
Bacterial Consortium ◽  
Phosphate Removal ◽  
Synthetic Wastewater ◽  
Box Behnken Design

Nitrogen Removal in a Real-Time Controlled Sequencing Batch Membrane Bioreactor

2010 ◽  
Vol 5 (3) ◽  
Author(s):  
Cheng-Nan Chang ◽  
Li-Ling Lee ◽  
Han-Hsien Huang ◽  
Ying-Chih Chiu
Keyword(s):  
Real Time ◽  
Nitrogen Removal ◽  
Membrane Bioreactor ◽  
Synthetic Wastewater ◽  
Real Time Control ◽  
Time Control ◽  
Cake Layer ◽  
On Line ◽  
Solid Liquid ◽  
Solid Liquid Separation

The performance of a real-time controlled Sequencing Batch Membrane Bioreactor (SBMBR) for removing organic matter and nitrogen from synthetic wastewater has been investigated in this study under two specific ammonia loadings of 0.0086 and 0.0045g NH4+-N gVSS−1 day−1. Laboratory results indicate that both COD and DOC removal are greater than 97.5% (w/w) but the major benefit of using membrane for solid-liquid separation is that the effluent can be decanted through the membrane while aeration is continued during the draw stage. With a continued aeration, the sludge cake layer is prevented from forming thus alleviating the membrane clogging problem in addition to significant nitrification activities observed in the draw stage. With adequate aeration in the oxic stage, the nitrogen removal efficiency exceeding 99% can be achieved with the SBMBR system. Furthermore, the SBMBR system has also been used to study the occurrence of ammonia valley and nitrate knee that can be used for real-time control of the biological process. Under appropriate ammonia loading rates, applicable ammonia valley and nitrate knee are detected. The real-time control of the SBMBR can be performed based on on-line ORP and pH measurements.

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