scholarly journals Application of Chitosan and Activated Carbon Nano-composite in Removal of Nitrite, Phosphate, and Ammonia From Aquaculture Wastewater

2019 ◽  
Vol 6 (2) ◽  
pp. 106-112
Author(s):  
Hassan Rezaei ◽  
Saeedeh Rastegar ◽  
Sanaz Naseri
Keyword(s):  
Activated Carbon ◽  
Contact Time ◽  
Wastewater Reuse ◽  
Palm Kernel ◽  
Carbon Adsorbent ◽  
Fish Farms ◽  
Nano Composite ◽  
Effluent Concentration ◽  
Quality Of Water ◽  
Aquaculture Wastewater

Developing an adsorbent with natural components is one of the effective methods to reduce the amount of wastewater pollutants. Wastewater reuse can improve the quality of water prior to entering the natural environment. The aim of this study was to evaluate the efficiency of chitosan nano-composite and activated carbon adsorbent in the removal of nitrite, phosphate, and ammonia pollutants from fish farms of Aq-Qala. To prepare the adsorbents, the shrimp shells were converted to nano-chitosan. The date palm kernel was prepared and activated with oxalic acid in pyrolysis furnace by injecting nitrogen gas into activated carbon, then, the nano-composite was prepared from nanochitosan and activated carbon. A field-laboratory study was conducted during the winter of 2018, and then, batches of synthesized nano-composite were investigated and the effects of pH, initial effluent concentration, and adsorption time were investigated. The experiments were performed in the pH range of 5-8, effluent concentration of 25-100 mg/L, and contact time of 15-90 minutes. The results showed that at optimum conditions (pH of 7, effluent concentration of 50 mg/L, and contact time of 60 minutes), the highest removal percentage and adsorption capacity for nitrite, phosphate, and ammonia contaminants were 99.98%, 99.77%, and 65.65%, and 6.65, 6.14, and 7.32 mg/g , respectively. Due to the high removal percentage (99.98%) of the chitosan and activated carbon nano-composite, the adsorbent was highly capable of removing pollutants (nitrite, phosphate, and ammonia).

scholarly journals Optimization of the Production of Ethylene Di-Amine Tetra-Acetic Acid Modified Activated Carbon using Palm Kernel Shell for the Adsorption of Copper ion

2021 ◽  
pp. 1-11
Author(s):  
Y. Yerima ◽  
I. Eiroboyi ◽  
I. Eiroboyi
Keyword(s):  
Acetic Acid ◽  
Activated Carbon ◽  
Contact Time ◽  
Copper Ions ◽  
Palm Kernel ◽  
Quadratic Model ◽  
Modified Activated Carbon ◽  
Palm Kernel Shell ◽  
Wide Range ◽  
Adsorbent Dose

Biomass-based activated carbon has received large attention due to its excellent characteristics such as inexpensiveness, good absorption behaviour, and potential to reduce strong dependence towards non-renewable precursors. The potential use of Palm Kernel Shell in modified activated carbon was evaluated by using the Response Surface Methodology. In this study, a 23 three-level Central Composite Design (CCD) was used to develop a statistical model for the optimization of process variables, contact time (10-130mins) X1, pH (5.0 – 8.0) X2, and adsorbent dose (0.4 -5.0g) X3. The investigation shows that Ethylene Di-Amine Tetra-Acetic Acid modified activated carbon prepared from Palm Kernel Shell is a promising adsorbent for the removal of copper ions from aqueous solutions over a wide range of concentrations with an optimized efficiency of 99% at the solution pH of 7.2, contact time of 70 minutes and adsorbent dose of 2.1g/L. The adsorption results are in line with the linear and quadratic model representation, which is evident from the models for optimization of copper ions.

Modification of Multilayer Carbon Nanotubes for the Removal of Arsenate

2016 ◽  
Vol 16 (4) ◽  
pp. 3835-3840
Author(s):  
Libing Liao ◽  
Gin-Lung Liu ◽  
Jiin-Shuh Jean ◽  
Wei-Teh Jiang ◽  
Zhaohui Li
Keyword(s):  
Carbon Nanotubes ◽  
Contact Time ◽  
Carbon Adsorbent ◽  
Superior Performance ◽  
Solution Ph ◽  
Nano Composite ◽  
X Ray ◽  
Multilayer Carbon Nanotubes ◽  
Removal Of Arsenic ◽  
Composite Carbon

The aim of this study was to explore a new nano-composite carbon adsorbent material for the removal of arsenic from water. The multilayer carbon nanotubes (MCNTs) were treated with different acids and/or modified with iron to create more surface COOH sites or Fe-impregnated MCNTs for the enhanced uptake of As(V). Tests were conducted as a function of initial As(V) concentrations, contact time, and solution pH. The coverage of ferric hydroxides on MCNTs and the uptake of As on Fe-MCNTs were independently confirmed by field emission scanning electron microscope and energy dispersive X-ray spectroscopy analyses. With an As(V) uptake capacities of 27 mg/g on Fe-MCNTs and 14 mg/g on acid-MCNTs, the material showed superior performance for As(V) removal.

scholarly journals Modification of Activated Carbon (Prepared From Flaxseed) With Fe3O4, Its Application As Adsorbent And Antibacterial

2021 ◽  
Author(s):  
M. H. Fekri ◽  
S. Isanejad Mohamareh ◽  
M. Hosseini ◽  
M. Razavi Mehr
Keyword(s):  
Activated Carbon ◽  
Contact Time ◽  
Structural Characteristics ◽  
Antibacterial Properties ◽  
Effect Of Temperature ◽  
Maximum Efficiency ◽  
Process Conditions ◽  
Nano Composite ◽  
Initial Concentration ◽  
Central Composite

Abstract In this work, magnetic activated carbon (MGAC) was investigated to remove the antibiotic cefazolin from aqueous solutions as well as its antibacterial properties. To determine the optimal process conditions and achieve maximum efficiency, the effect of temperature, contact time, initial concentration of the drug, composite dosage, and pH using the response surface method (RSM) and the central composite design model (CCD) were investigated by DOE software. Structural characteristics and morphology of the nanocomposite were analyzed by using FTIR, XRD, EDAX, SEM, TEM, BET, TGA, VSM, analyzes. The results showed that pH = 6, the temperature of 30 ℃, contact time 150 minutes, initial concentration of drug 20 mg/l, and composite dosage 0.03 g were the best conditions for removing cefazolin from aqueous solution. In these conditions, the magnetically activated carbon was able to remove 96% of cefazolin. The Langmuir, Freundlich, and Temkin isotherms were also studied and the results showed that the absorption behavior is most consistent with the Temkin isotherm. The results of thermodynamic experiments also showed that the adsorption process is exothermic and spontaneous. Finally, the antibacterial properties of the prepared nano composite on Streptococcus and Salmonella were investigated and the results showed that the prepared sample has antibacterial properties.

scholarly journals Utilization of a novel activated carbon adsorbent from press mud of sugarcane industry for the optimized removal of methyl orange dye in aqueous solution

2019 ◽  
Vol 9 (8) ◽  
Author(s):  
Dominic Justine G. Rondina ◽  
Deanne V. Ymbong ◽  
Macvon Jovy M. Cadutdut ◽  
Jhon Ray S. Nalasa ◽  
Jonas B. Paradero ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Activated Carbon ◽  
Contact Time ◽  
Active Sites ◽  
Adsorption Process ◽  
Carbon Adsorbent ◽  
Press Mud ◽  
Methyl Orange Dye ◽  
Adsorbent Dose ◽  
Sugarcane Industry

Abstract In this study, a novel activated carbon adsorbent from the press mud of a sugarcane industry was used to remove methyl orange dye (MOD) from aqueous solution and was optimized via response surface methodology using the central composite design. The adsorbent was characterized by FTIR and SEM analysis and showed the presence of functional groups such as alcohols, nitriles, amides, alkane, alkyl halides, and alkenes, and it also showed fibrous surface morphological appearance. The factors affecting MOD adsorption, such as initial concentration, adsorbent dose, and contact time were examined, and optimal pH 2.0 to remove MOD in an aqueous solution that is found in various studies is also utilized. The results showed maximum MOD removal rate of 98.68% when the initial concentration, adsorbent dose, and contact time were optimally set as 24.17 mg/L, 0.5 g, and 20 min, respectively. The analysis of the equilibrium data revealed that MOD adsorption using press mud activated carbon best fitted the Langmuir isotherm (R2 = 0.96103) which implies monolayer adsorption process. Also, the kinetics of MOD adsorption using press mud activated carbon followed a pseudo-first-order model (R2 = 0.96096) which means that the active sites are proportional to the non-active sites during the adsorption process.

Adsorption of Cadmium from Aqueous Solution by Biomass: Comparison of Solid Pineapple Waste, Sugarcane Bagasse and Activated Carbon

2013 ◽  
Vol 832 ◽  
pp. 810-815 ◽  
Author(s):  
M.S. Rosmi ◽  
S. Azhari ◽  
R. Ahmad
Keyword(s):  
Aqueous Solution ◽  
Activated Carbon ◽  
Sugarcane Bagasse ◽  
Contact Time ◽  
Agricultural Waste ◽  
Palm Kernel ◽  
Isotherm Models ◽  
Maximum Adsorption Capacity ◽  
Adsorbent Dosage ◽  
Pineapple Waste

The use of low-cost adsorbent derived from agricultural waste has been investigated for the removal of Cd (II) from aqueous solution. This research reports the feasibility of using solid pineapple waste (SPW), sugarcane bagasse (SCB) and activated carbon (AC) derived from palm kernel for the removal of Cd (II) under different experimental conditions. Batch experiments were carried out at various pH (3-12), adsorbent dosage (0.01-2 g) and contact time (15-150 min). The maximum Cd (II) removal was shown by SPW (90%) followed by SCB (55%) and AC (30%) at pH 7 with a contact time of 120 min, adsorbent dosage of 1.0 g and at 1.0 ppm of the initial concentration of Cd (II) solution. The kinetics study shows that the adsorption process fitted the pseudo-second-order-model. The experimental data was analysed by both Freundlich and Langmuir isotherm models. It was found that the Langmuir model appears to well fit the isotherm. The Langmuir maximum adsorption capacity calculated from Langmuir for SPW, SBC and AC were 0.3332 mg/g, 0.1865 mg/g and 0.1576 mg/g respectively. The order of Cd (II) removal by the adsorbents was SPW>SCB>AC. Thus, SPW may be an alternative adsorbent for the removal of Cd (II) ions form aqueous solution. The characterization of the SPW, SCB and AC were also carried out by using Scanning Electron Microscopy (SEM) and Nitrogen Gas Adsorption Single Point Surface Area Analyzer (BET).

Comparative Studies of Activated Carbon-Attapulgite and Zeolite-Attapulgite Composite Adsorbent on Congo Red Adsorption

2010 ◽  
Vol 33 ◽  
pp. 34-37
Author(s):  
Zhang Weng ◽  
Z.Q. Jing ◽  
Yu Kong ◽  
Wei Shen
Keyword(s):  
Activated Carbon ◽  
Congo Red ◽  
Contact Time ◽  
Low Cost ◽  
Reduction Rate ◽  
Carbon Adsorbent ◽  
Adsorption Rate ◽  
Solution Ph ◽  
Composite Adsorbent ◽  
The Difference

This study investigated the adsorption of congo red by activated carbon-attapulgite composite adsorbent (ACA) and zeolite-attapulgite composite adsorbent (ZA) from aqueous solution. All of these two adsorbents have mesopores and macropores structure different from general activated carbon adsorbent with micropores distribution through analysis of mercury porosimeter .The research focused on the effects of adsorption capacity in four aspects: contact time, solution pH, temperature and initial dye concentration. The results indicated that ACA had higher adsorption rate in the first 30 min contact time and ZA had higher removal percentage because of the difference on the pore size and total pore area. There was little difference on removal percentage of ACA and ZA when pH changing from 1 to 13 and the adsorption rate exceeded 94% in all kinds of pH condition. The removal efficiency of congo red on ACA and ZA increased from 92% to 95% with increase of temperature from 293K to323K. The reduction rate of congo red decreased with an increase in the initial congo red concentration for ACA and ZA.These results suggest that all of the two adsorbents is a potential low-cost adsorbent for the dye removal from industrial wastewater.

Quality of water from fish farms and histopathological analysis of tilapia ( Oreochromis sp.) in São José de Ribamar and Paço do Lumiar, state of Maranhão, Brazil

2021 ◽  
Author(s):  
Ingrid Tayane Vieira da Silva Nascimento ◽  
Natália Jovita Pereira ◽  
Raquel Soares Martins ◽  
Thiago Anchieta Melo ◽  
Débora Martins Silva Santos ◽  
...  
Keyword(s):  
Histopathological Analysis ◽  
Fish Farms ◽  
Quality Of Water

Eternal engine of progress

2021 ◽  
pp. 41-45
Author(s):  
В.А. Гвоздев ◽  
Л.В. Леонов ◽  
О.Н. Рублевская
Keyword(s):  
Drinking Water ◽  
Activated Carbon ◽  
Water Supply ◽  
Measurement System ◽  
Odor Control ◽  
Wastewater Disposal ◽  
Quality Of Water ◽  
Precipitation Measurement ◽  
General Director

Качество услуг водоснабжения и водоотведения за первые двадцать лет XXI века вывело на новый уровень развития ГУП «Водоканал Санкт-Петербурга» благодаря внедрению инновационных технологий в системах водоснабжения и водоотведения. Использование технологий, таких как двухступенчатое обеззараживание питьевой воды, дезодорирование полигонов, геотубирование, применение центрифуг «Флоттвег», порошкообразного однокомпонентного флокулянта, порошкообразного активированного угля, внедрение системы измерения осадков, осуществлялись при активном участии Федора Ивановича Лобанова – помощника генерального директора ГУП «Водоканал Санкт-Петербурга» по работе с промышленностью, которому в ноябре 2021 г. исполнилось 80 лет. The quality of water supply and wastewater disposal services over the first twenty years of the 21st century has brought SUE «Vodokanal of St. Petersburg» to a new level of development owing to the introduction of innovative technologies in water supply and wastewater disposal systems. The use of technologies, such as two-stage disinfection of drinking water, odor control of landfills, geotubing, the use of Flottweg centrifuges, powdered one-component flocculant, powdered activated carbon, the introduction of a precipitation measurement system, were carried out with the active participation of Fedor Ivanovich Lobanov, Assistant to the General Director of SUE «Vodokanal of St. Petersburg» on dealing with industries, who turned 80 in November 2021.

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