Experimental Study on the Preparation of Nutshell Activated Carbon and the Disposal of Catering Wastewater

2014 ◽  
Vol 675-677 ◽  
pp. 530-533
Author(s):  
Jin Yong Huang ◽  
Ming Qin ◽  
Qiu Ping Peng ◽  
Sha Wen ◽  
Yong Xiang Zhang
Keyword(s):  
Experimental Study ◽  
Methylene Blue ◽  
Activated Carbon ◽  
Reaction Temperature ◽  
Proper Time ◽  
Removal Rate ◽  
Optimal Conditions ◽  
Time Of Reaction

The study used self-made nutshell activated carbon and took catering wastewater as research object. After pretreatment, the catering wastewater was adsorbed by nutshell activated carbon.Throught investigating the adsorption value of methylene blue and iodine,the effect of Peach pit shell activated carbon is higher than others.The optimal conditions are determined: proper time of reaction 4 h, Peach shell activated carbon dosage 30 mg/L, pH 6.0, reaction temperature 30°C. Under this optimum, the removal rate of CODcr as well as grease can be as high as 92.75% and 87.05%, respectively.

Study on Treatment of Chromium(VI) Wastewater by Cuprous Oxide

2015 ◽  
Vol 713-715 ◽  
pp. 2909-2912
Author(s):  
Bin Zhao ◽  
Li Ke Zou ◽  
Guo Yong Li
Keyword(s):  
Photocatalytic Activity ◽  
Reaction Temperature ◽  
Cuprous Oxide ◽  
Oxide Catalyst ◽  
Removal Rate ◽  
Optimal Conditions ◽  
Chromium Vi

Cuprous oxide catalyst was prepared and applied as photocatalist to treat chromium (VI) in wastewater, and the photocatalytic activity of the cuprous oxide was studied. The optimal conditions for the treatment was as follows: the pH of wastewater was 3, the amount of catalysts was 0.3 g/L, the reaction temperature was 60°C. Under the optimal conditions, the removal rate of chromium (IV) in wastewater reached 50% in the presence of cuprous oxide catalyst.

Iron-Cobalt Magnetic Activated Carbon as an Effective Adsorbent for the Removal of Methylene Blue and Acid Blue 80

NANO ◽  
2021 ◽  
pp. 2150068
Author(s):  
Zhao Yang ◽  
Zhongwei Zhao ◽  
Xuan Yang ◽  
Zongli Ren
Keyword(s):  
Methylene Blue ◽  
Activated Carbon ◽  
Organic Dyes ◽  
Removal Rate ◽  
Recovery Process ◽  
Adsorption Activity ◽  
Magnetic Activated Carbon ◽  
Pseudo Second Order ◽  
Repeated Use ◽  
Acid Blue

For the treatment of dye wastewater, it is of great significance to develop new adsorbents with high adsorption capacity and good separation effect. In this study, the Fe-Co magnetic activated carbon material (CN-Fe-Co-AC) was first prepared by high-temperature calcination. CN-Fe-Co-AC is physically characterized by various methods. CN-Fe-Co-AC can efficiently and quickly remove the organic dyes methylene blue (MB) and acid blue 80 (AB80). The adsorption of MB and acid blue based on CN-Fe-Co-AC adsorbent is mainly through the specific surface area and the functional groups on the surface. During this recovery process, the adsorption activity of CN-Fe-Co-AC for MB and AB80 decreased slightly. Kinetic data can be described using a Pseudo-second-order model and the data for adsorption equilibrium can be described using the Langmuir isotherm. The theoretical adsorption capacities of MB and AB80 are 104.82[Formula: see text]mg/g and 26.94[Formula: see text]mg/g, respectively. After repeated use of five times, the removal rate of MB exceeded 96%, and the removal rate of AB80 exceeded 75%. The excellent adsorption performance and recyclability of CN-Fe-Co-AC indicate that this material has certain potential application value.

The New Method to Separate Stannum and Copper in the Process of Refining Tin

2020 ◽  
Vol 996 ◽  
pp. 157-164
Author(s):  
Bo Zhang ◽  
Da Chun Liu ◽  
Heng Xiong ◽  
Zhen Gen Zhou ◽  
Xu Li ◽  
...  
Keyword(s):  
Experimental Data ◽  
Experimental Study ◽  
Reaction Temperature ◽  
Removal Rate ◽  
Human Life ◽  
The Other ◽  
New Method ◽  
Promising Technology ◽  
Temperature Time ◽  
Sulfiding Agent

As the ancient metal, Sn is widely used in all aspects of human life. Nowadays, S, as the vulcanizing agent, is used in the process of refining tin to separate Cu and Sn. However, there are few reports about the other agent of removing copper from stannum. In this study, SnS, a new sulfiding agent to separate Cu and Sn, was investigated. During the process, SnS replaces the combination of Sn and Cu. The variables considered in the experimental study were reaction temperature, time and the ratio of reactants. The experimental data indicated under certain conditions, the removal rate of Cu reach 94.3%. At last, we studied the vacuum reaction of Cu2S and Sn, results indicated that under appropriate conditions, the Cu is detected. The SnS is formed. And after the vacuum reaction, the SnS could be used recycling. This work presented a promising technology for separating Cu from tin.

scholarly journals Research application coal material is prepared from maccadamia peel and denatured by H2O2 to treat methylene blue

2020 ◽  
Vol 3 (2) ◽  
pp. 96-104
Author(s):  
Dao Minh Trung
Keyword(s):  
Methylene Blue ◽  
Wastewater Treatment ◽  
Activated Carbon ◽  
Treatment Time ◽  
Blue Color ◽  
Optimal Conditions ◽  
Research Application ◽  
Research Results ◽  
Color Treatment ◽  
H2o2 Oxidation

Macadamia shell contains a carbon content (47 - 49%), in addition, the shell contains 46.52% Oxidation, Hidro 6.10%, Nitrogen 0.36% and relatively low ash content of only 0.22%, this indicates the grain Macadamia has the potential to become activated carbon thanks to the above characteristics. This study was conducted to modify activated carbon by oxidizing agents to change the surface structure of activated carbon from hydrophobic to hydrophilic, non-polarizing to polarization, increasing the amount of adsorption simultaneously creating more durable links between dyes and activated carbon. Study of Methylene Blue wastewater treatment with coal from Maccadamia shell modified with H2O2 agent at H2O2 ratio : coal = 10:1. Research results show that Methylene Blue adsorption capacity reaches 1g /266,26mg Methylene Blue at optimal conditions corresponding to 25% concentration and 48 hours of soaking time. Analysis of infrared spectra showed that coal is modified by H2O2 agent with functional groups –OH, Carboxylic functional group C=O, group C-H in NH3, C–N group in Amine aliphatic or in Alcohol or Phenol and C–O bonding. Modified coal by H2O2 oxidation agent has Methylene Blue color treatment efficiency of 93.26%, corresponding to the original color of 474.67 Pt - Co at the respective optimal conditions pH = 8.5, dose of 1 g/L and treatment time of 60 minutes. Research results are similar to other research results and are applicable to color wastewater treatment.

Experimental Study on Photocatalytic Pretreatment of Restaurant Wastewater with Nano TiO2

2013 ◽  
Vol 807-809 ◽  
pp. 1575-1578
Author(s):  
Jin Yong Huang ◽  
Li Bin Peng ◽  
Lin Peng
Keyword(s):  
Experimental Study ◽  
Removal Efficiency ◽  
Biological Treatment ◽  
Photocatalytic Oxidation ◽  
Proper Time ◽  
Irradiation Time ◽  
Optimal Conditions ◽  
Oxidation Technology ◽  
Restaurant Wastewater

The study aims at investigating the performance of nanoTiO2photocatalytic oxidation technology for the pretreatment of restaurant wastewater. The rate of lipids removal depends on conditions, such as irradiation time, TiO2dosage, aeration and addition of Fe3+or H2O2.The optimal conditions are determined: proper time of irradiation 10 min, TiO2dosage 25mg/L,pH6.0, adding 5mL Fe3+. Under this optimum, the removal efficiency of lipids reaches 74.7 ~ 88.6%, and that of CODcr was around 45.2~76.2%.While using illumination for 10 min, companied with TiO2and Fe3+/H2O2, the removal efficiency of Grease could increase by 3%~15%.Thus, satisfactory results were achieved for pretreatment of Grease Wastewater from restaurant, and this technique could be used as a pretreatment step for next biological treatment of restaurant wastewater.

KBrO3 Catalyzed Wet Air Oxidation of C.I. Reactive Brilliant Red K-2G

2012 ◽  
Vol 512-515 ◽  
pp. 2283-2286
Author(s):  
Xue Wei Dong
Keyword(s):  
Oxygen Partial Pressure ◽  
Partial Pressure ◽  
Reaction Temperature ◽  
Azo Dye ◽  
Removal Rate ◽  
Catalytic Wet Air Oxidation ◽  
Optimal Conditions ◽  
Air Oxidation ◽  
Wet Air Oxidation ◽  
Catalyst Dosage

The effect of KBrO3 on catalytic wet air oxidation to be used in azo dye C.I. Reactive Brilliant Red K-2G decolorization under different conditions is evaluated. The reaction temperature, oxygen partial pressure, pH and catalyst dosage were studied. The optimal conditions of applying KBrO3/O2 system were: reaction temperature 150°C, oxygen partial preSubscript textssure 1.0 Mpa, pH 4 and Reactive Brilliant Red K-2G: KBrO3 (mole ratio) 1:0.5. Under the optimal conditions, the color removal rate was 98.9%. KBrO3/O2 system was efficient in azo dye Reactive Brilliant Red K-2G decolorrization.

scholarly journals Adsorption of Methylene Blue in Water onto Activated Carbon by Surfactant Modification

Water ◽  
2020 ◽  
Vol 12 (2) ◽  
pp. 587 ◽  
Author(s):  
Yu Kuang ◽  
Xiaoping Zhang ◽  
Shaoqi Zhou
Keyword(s):  
Methylene Blue ◽  
Activated Carbon ◽  
Cationic Surfactant ◽  
Anionic Surfactants ◽  
Removal Rate ◽  
Sodium Dodecyl ◽  
Ammonium Bromide ◽  
Lauryl Sulfate ◽  
Cationic Dye ◽  
Adsorption Performance

In this paper, the enhanced adsorption of methylene blue (MB) dye ion on the activated carbon (AC) modified by three surfactants in aqueous solution was researched. Anionic surfactants—sodium lauryl sulfate (SLS) and sodium dodecyl sulfonate (SDS)—and cationic surfactant—hexadecyl trimethyl ammonium bromide (CTAB)—were used for the modification of AC. This work showed that the adsorption performance of cationic dye by activated carbon modified by anionic surfactants (SLS) was significantly improved, whereas the adsorption performance of cationic dye by activated carbon modified by cationic surfactant (CTAB) was reduced. In addition, the effects of initial MB concentration, AC dosage, pH, reaction time, temperature, real water samples, and additive salts on the adsorption were studied. When Na+, K+, Ca2+, NH4+, and Mg2+ were present in the MB dye solution, the effect of these cations was negligible on the adsorption (<5%). The presence of NO2- improved the adsorption performance significantly, whereas the removal rate of MB was reduced in the presence of competitive cation (Fe2+). It was found that the isotherm data had a good correlation with the Langmuir isotherm through analyzing the experimental data by various models. The dynamics of adsorption were better described by the pseudo-second-order model and the adsorption process was endothermic and spontaneous. The results showed that AC modified by anionic surfactant was effective for the adsorption of MB dye in both modeling water and real water.

scholarly journals Nanobiocatalyst beds with Fenton process for removal of methylene blue

2021 ◽  
Vol 11 (2) ◽  
Author(s):  
Azize Alayli ◽  
Hayrunnisa Nadaroglu ◽  
Esra Turgut
Keyword(s):  
Methylene Blue ◽  
Dye Removal ◽  
Removal Rate ◽  
Synthesis Process ◽  
Blue Dye ◽  
Fenton Process ◽  
Optimal Conditions ◽  
Optimum Conditions ◽  
Method Optimization ◽  
Xrd Techniques

AbstractThe remediation of methylene blue from wastewater using chitosan-sunflower-nano-iron (CSN) beds was examined in this study with the Fenton process. Nano-iron is synthesized using the green synthesis process. Then, biopolymer beds obtained nano-iron, sunflower tray waste, and chitosan. These beds used the Fenton process for removing Methylene blue (MB) from water. Beds synthesis and dye removing are characterized using SEM, TEM, FTIR, and XRD techniques. For the method optimization, the effects of dye concentration, temperature, pH, H2O2, and amount of biocatalyst were studied. The result of the wavelength scan was found 660 nm for methylene blue dye. Using CSN, catalyst was very effective in color removal for MB under optimal conditions. The highest removal rate 98% was obtained at pH 6 for 270 min. The optimum conditions for the MB dye are as follows; dye concentration: 25 mg/L, amount of absorbent: 2.5 mg/mL, temperature: 60 °C, H2O2 amount: 20 mg/L (600 µL, 30%). When the experiment is studied in optimum conditions, max. dye removal was calculated to be 98%. From SEM, TEM, XRD, and FTIR results, the change in the surface of the biocatalyst could be clearly observed. It is understood that the biocatalyst synthesized from the results we obtained easily removed a large amount of dye (MB).

Analisis Variasi Temperatur Aktivasi Terhadap Daya Serap Arang Aktif Tandan Aren (Arenga Pinnata Merr) Dengan Agen Aktivasi Potassium Silicate(K2SiO3)

2020 ◽  
Vol 5 (3) ◽  
pp. 221
Author(s):  
Muhammad Azam ◽  
Muhammad Anas ◽  
Erniwati Erniwati
Keyword(s):  
Methylene Blue ◽  
Activated Carbon ◽  
Adsorption Capacity ◽  
Temperature Variation ◽  
Chemical Activation ◽  
Weight Ratio ◽  
Potassium Silicate ◽  
Physical Activation ◽  
Activation Temperature ◽  
Pyrolysis Reactor

This study aims to determine the effect of variation of activation temperature of activated carbon from sugar palm bunches of chemically activatied with the activation agent of potassium silicate (K2SiO3) on the adsorption capacity of iodine and methylene blue. Activated carbon from bunches of sugar palmacquired in four steps: preparationsteps, carbonizationstepsusing the pyrolysis reactor with temperature of 300 oC - 400 oC for 8 hours and chemical activation using of potassium silicate (K2SiO3) activator in weight ratio of 2: 1 and physical activation using the electric furnace for 30 minutes with temperature variation of600 oC, 650 oC, 700 oC, 750 oC and 800 oC. The iodine and methyleneblue adsorption testedby Titrimetric method and Spectrophotometry methodrespectively. The results of the adsorption of iodine and methylene blue activated carbon from sugar palm bunches increased from 240.55 mg/g and 63.14 mg/g at a temperature of 600 oC to achieve the highest adsorption capacity of 325.80 mg/g and 73.59 mg/g at temperature of 700 oC and decreased by 257.54 mg/g and 52.03 mg/g at a temperature of 800 oCrespectively.However, it does not meet to Indonesia standard (Standard Nasional Indonesia/SNI), which is 750 mg/g and 120 mg/g respectively.

Sign in / Sign up

Export Citation Format

Share Document