scholarly journals Adsorption Performance of Dyes Over Zeolite for Textile Wastewater Treatment

2021 ◽  
Vol 28 (3) ◽  
pp. 329-337
Author(s):  
Zaman Ageel Hammood ◽  
Tasnim Fahim Chyad ◽  
Rasha Al-Saedi
Keyword(s):  
Wastewater Treatment ◽  
Langmuir Isotherm ◽  
Industrial Wastewater ◽  
Dye Adsorption ◽  
Synthetic Zeolite ◽  
Aqueous Environment ◽  
Negative Consequences ◽  
Solution Ph ◽  
Adsorption Performance ◽  
The Impact

Abstract Removal of textile dyes from wastewater have recently attracted much attention, due to the toxicity, difficult visibility, and thereby the negative consequences on the aqueous environment. Therefore, there have been diverse promising new techniques such as adsorption for dyes removal from industrial wastewater. Compared to the highly cost treatment techniques, removal of dyes using the adsorption process is relatively simple and requires less cost. Synthetic zeolite was used in this research as a high capacity nano-adsorbent for the removal of reactive dyes from coloured wastewater. The impact of main parameters: dose of adsorbent (0.0025 to 0.02 g), pollutant concentration (25 to 200 mg/L), contact time (10 to 120 minutes), degree of agitation (25 and 300 rpm), and solution pH (2 to 8) on adsorption performance of the synthesised zeolite was investigated. The optimum values of these parameters to remove dyes efficiently at 90 % removal were 0.02 g, 200 mg/L, 80 min, 300 rpm, and 6-7 respectively. Also, two models were evaluated, the Langmuir and Freundlich isotherms. Langmuir isotherm was more efficient for representing the data than the Freundlich. The results of the Langmuir isotherm gave KL = 0.08 L/mg, qm = 6.02 mg/g, and R 2 = 0.98, which fitted to the adsorption data of zeolite. Reactive dye adsorption by synthetic zeolite is a vital tool in identifying the fate of dye removal from industrial wastewater treatment plants.

Photocatalytic removal of cyanide with illuminated TiO2

2011 ◽  
Vol 64 (7) ◽  
pp. 1383-1387 ◽  
Author(s):  
M. Shirzad Siboni ◽  
M. R. Samarghandi ◽  
J.-K. Yang ◽  
S.-M. Lee
Keyword(s):  
Aqueous Solutions ◽  
Langmuir Isotherm ◽  
Industrial Wastewater ◽  
Photocatalytic Oxidation ◽  
Maximum Adsorption Capacity ◽  
Photocatalytic Reaction ◽  
Solution Ph ◽  
Cyanide Concentration ◽  
Photocatalytic Removal ◽  
Oxidation Efficiency

Effects of TiO2 dosage, pH and initial cyanide concentration on the removal efficiency of cyanide from aqueous solutions with illuminated TiO2 have been investigated. Adsorption and oxidation were recognized as significant processes for the elimination of cyanide. From the Langmuir isotherm, the maximum adsorption capacity was determined as 17.24 mg/g at pH 7. Adsorbed amount of cyanide slightly increased as the TiO2 dosage increased. However, as no significant increase was observed above 1 g/L TiO2, an optimum TiO2 dosage was determined as 1 g/L. Photocatalytic oxidation efficiency of cyanide was greatly affected by the solution pH. It increased as the solution pH decreased. The photocatalytic oxidation efficiency after 120 min was 80.4% at pH 3 while it was only 20.4% at pH 11. Photocatalytic oxidation of cyanide was well described by the second-order kinetics. Photocatalytic reaction with illuminated TiO2 can be effectively applied to treat industrial wastewater contaminated with cyanide.

pH Dependence on Biosorption of Pb (II) by P. amaryllifolius Roxb

2014 ◽  
Vol 625 ◽  
pp. 757-760
Author(s):  
Mohd Zamri Abdullah ◽  
Suriati Sufian ◽  
Farah Hanim Abdul Hamid
Keyword(s):  
Heavy Metal ◽  
Wastewater Treatment ◽  
Langmuir Isotherm ◽  
Ph Dependence ◽  
Important Criterion ◽  
Sorption Activity ◽  
Solution Ph ◽  
Living Biomass ◽  
Optimum Ph ◽  
Alkaline Conditions

Solution pH plays an important criterion in the biosorption system in ensuring optimum uptake of heavy metal by a biomass is achieved at the highest performance. In this study, the biosorption of lead (II) ions by the non-living biomass of P. Amaryllifolius Roxb is performed at various pH from acidic to alkaline conditions. Results show that the optimum pH for the removal of lead (II) ions from wastewater occurs at pH 5, whereby the sorption activity occurs through monolayer process as it follows the Langmuir isotherm. High removal percentage of the metal ions at various concentrations further emphasize on the viability of P. amaryllifolius Roxbto be utilized as a green resources in the wastewater treatment.

Economic and Environmental Assessment of Pulp and Paper Industrial Wastewater Treatment

2011 ◽  
Vol 90-93 ◽  
pp. 2929-2932 ◽  
Author(s):  
Jing Min Hong ◽  
Zainab. Z Ismail ◽  
Jing Lan Hong
Keyword(s):  
Wastewater Treatment ◽  
Environmental Impact ◽  
Environmental Assessment ◽  
Industrial Wastewater ◽  
Photochemical Oxidation ◽  
Aquatic Ecotoxicity ◽  
Terrestrial Ecotoxicity ◽  
The Impact ◽  
Pulp Production ◽  
Abiotic Depletion

A cost combined life cycle environmental assessment was carried out to estimate the economic and environmental impact of wastewater treatment in the pulp production site of China. Results showed that the impact seen from abiotic depletion, acidification, eutrophication, global warming, fresh water aquatic ecotoxicity, and marine aquatic ecotoxicity categories represented an important contribution to the overall environmental impact, while the impact seen from human toxicity, terrestrial ecotoxicity, and photochemical oxidation categories played relatively small role. Specifically, the machine, electricity, coagulant production processes had the highest contribution to the overall environmental and economic impact. Improving electricity and chemicals applications efficiency are the efficient way to minimize overall environmental and economic impacts.

scholarly journals The Effect of Covid 19 on the Performance of Industrial Wastewater Treatment Plant

2020 ◽  
Author(s):  
Elif Hatice Gürkan
Keyword(s):  
Wastewater Treatment ◽  
Industrial Wastewater ◽  
Labour Force ◽  
Treatment Plant ◽  
Industrial Zone ◽  
Transportation Energy ◽  
Industrial Wastewater Treatment ◽  
Industrial Zones ◽  
The Impact

Abstract Samsun is Black Sea Region's one of the biggest industrial and trade cities with its proximity to transportation, energy, infrastructure and major markets. It contributes to the national economy in all sectors with six Organized Industrial Zones, transportation and the quality of the labour force opportunities and industrial investments. This study aims to examine the impact of COVID-19 on the industrial wastewater treatment in Samsun Central Organized Industrial Zone. It is a roadmap for post-epidemic science at the same time.

scholarly journals Potassium Permanganate Dye Removal from Synthetic Wastewater Using A Novel, Low-Cost Adsorbent, Modified from The Powder of Foeniculum Vulgare Seeds

2021 ◽  
Author(s):  
Suhair Bani-Atta
Keyword(s):  
Potassium Permanganate ◽  
Low Cost ◽  
Synthetic Wastewater ◽  
Isotherm Models ◽  
Solution Ph ◽  
Foeniculum Vulgare ◽  
Adsorption Performance ◽  
Adsorbent Surface ◽  
Isotherm And Kinetic Models ◽  
The Impact

Abstract Seeds powder of Foeniculum vulgare (FVES) was used to prepare a novel adsorbent, the new adsorbent was characterized and its ability to eliminate potassium permanganate (KMnO 4 ) was examined. The impact of KMnO 4 concentration, adsorbent dose, contact temperature, contact time, and solution pH on the adsorption performance was also investigated. The experimental data of this adsorption was analyzed by different kinetic and isotherm models. As Constants of thermodynamic ΔG°, ΔH°, and ΔS° have been also evaluated. Surface area, pore volume, and pore size of the FVESP adsorbent were determined as 0.6806 m 2 .g -1 , 0.00215 cm 3 .g -1 , and 522.063 Å, as pH ZPC of Ox- FVESP was stated to be 7.2. The R 2 values obtained from applying different isotherm and kinetic models (0.999 and 0.996) showed that the adsorption performance of KMnO 4 follows the Langmuir and Pseudo 2 nd order models. Furthermore, high adsorption capacities of 1111.11, 1250.00, and 1428.57 (mg/g) were achieved at three temperatures that were used in this study. Constants of thermodynamic ΔG°, ΔH°, and ΔS° values indicate chemical and spontaneous adsorption at the adsorbent surface.

scholarly journals Application of Fenton's Reagent in the Textile Wastewater Treatment Under Industrial Conditions

2012 ◽  
Vol 19 (2) ◽  
pp. 163-174
Author(s):  
Stanisław Ledakowicz ◽  
Lucyna Bilińska ◽  
Renata Żyłła
Keyword(s):  
Wastewater Treatment ◽  
Industrial Wastewater ◽  
Reactive Dyes ◽  
Textile Wastewater ◽  
Fenton’S Reagent ◽  
Fenton's Reagent ◽  
Reactive Dyeing ◽  
Textile Auxiliary ◽  
Textile Wastewater Treatment ◽  
The Impact

Application of Fenton's Reagent in the Textile Wastewater Treatment Under Industrial Conditions Application of reactive dyes is very popular in textile industry as these dyestuffs are characterized by good fastness properties. Constapel et al in 2009 estimated the production of this type of dyes for over 140,000 Mg/year. The reactive dyes are mostly (50%) employed for coloration of cellulosic fibers, however they can also be applied on wool and nylon. Unfortunately, they possess a low degree of fixation (50÷90%), since the functional groups also bond to water, creating hydrolysis and the excess of dyes applied cause a colored pollution of aqueous environment. Moreover, dyeing process requires the use of: electrolytes in the form of aqueous solutions of NaCl or Na2SO4 in the concentration up to 100 g/dm3, alkaline environment (pH > 10) and textile auxiliary agents (including detergents). Therefore, the wastewater generated during the reactive dyeing processes is characterized by high salinity, pH value and color, and due to low value of the BOD5/COD ratio are nonbiodegradable. The successful methods of textile wastewater treatment could be Advanced Oxidation Processes (AOPs), amongst which the Fenton reagent seems to be most promising as it is the cheapest and easy in use. Based on the newest literature survey it was found that many successful tests with Fenton reaction were performed mainly in decolorization. However, not enough attention was devoted to decolorization of real industrial wastewater containing dyes, detergents and salts NaCl, or Na2SO4. The experiments carried out in a laboratory scale were focused on the impact of NaCl and textile auxiliary agent (liquid dispersing and sequestering agent) on an inhibition of decolorization process by Fenton's reagent. The objects of the investigation were synthetic mixtures simulating the composition of real textile wastewater as well as the real industrial wastewater generated in the reactive dyeing. The inhibition of the Fenton decolorization in the presence of NaCl and liquid dispersing and sequestering agent was demonstrated. Additional experiments using pulse radiolysis were carried out in order to confirm the inhibition of chloride in the decolorization process.

scholarly journals Ecological Life Cycle Assessment of Modified Novolaks Waste Used in Industrial Wastewater Treatment

2017 ◽  
Vol 12 (1) ◽  
pp. 41-50
Author(s):  
Wioletta M. Bajdur ◽  
Anna Henclik ◽  
Radomir Ščurek ◽  
Kateřina Sikorová
Keyword(s):  
Wastewater Treatment ◽  
Life Cycle Assessment ◽  
Life Cycle ◽  
Environmental Impact ◽  
Manufacturing Process ◽  
Industrial Wastewater ◽  
Phenol Formaldehyde ◽  
Water Soluble ◽  
Industrial Wastewater Treatment ◽  
The Impact

Abstract Ecological Life Cycle Assessment (LCA) applied in the assessment of the impact of products on the environment is a technique that allows for the evaluation of the environmental impact of polymeric flocculants used in industrial wastewater treatment. The possibility of conducting a full life cycle and thus manufacturing process analysis allows for reliable and accurate identification of the sources of environmental hazards and the impact of new products on the environment. Newly synthesized waste-based polymers are water soluble and possess the properties of flocculants, while reducing the parameters in industrial wastewater. In the paper, there are presented the results of the analysis conducted using LCA technique for the assessment of the impact of modified waste phenol formaldehyde resin (Novolak) on the environment. LCA technique was used to assess the impact of the new flocculant applied in the process of metallurgical wastewater treatment taking into account the environmental impact of the flocculant manufacturing process.

RESEARCH AND EVALUATE TREATMENT EFFICIENCY ON TAPIOCA PROCESSING INDUSTRIAL WASTEWATER BY AEROBIC BIOFILTER TECHNOLOGY WITH VARIOUS MATERIALS

2010 ◽  
Vol 13 (3) ◽  
pp. 54-66
Author(s):  
Phuong Thi Thanh Nguyen ◽  
Phuoc Van Nguyen ◽  
Anh Cam Thieu
Keyword(s):  
Wastewater Treatment ◽  
Industrial Wastewater ◽  
Utilization Rate ◽  
Organic Loading ◽  
Treatment Efficiency ◽  
Research Results ◽  
Loading Rates

This study was performed to evaluate the efficiency of tapioca processing wastewater treatment using aerobic biofilter with variety of biofilter media: coir, coal, PVC plastic and Bio - Ball BB15 plastic. Research results in the lab demonstrated all four aerobic biofilter models processed can treated completely N and COD which COD reached 90-98% and N reached 61-92%, respectively, at the organic loading rates in range of 0.5, 1, 1.5 and 2 kgCOD/m3.day. The results identified coir filter was the best in four researched materials with removal COD and specific substract utilization rate can reach 98%, and 0.6 kg COD/kgVSS.day. Research results open the new prospects for the application of the cheap materials, available for wastewater treatment.

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