COPPER REMOVAL FROM SYNTHETIC AQUEOUS SOLUTIONS BY HYDROXYAPATITE GRANULES SYNTHESIZED USING MICROWAVE HEATING

2011 ◽  
Author(s):  
Claudia Maria Simonescu
Keyword(s):  
Aqueous Solutions ◽  
Microwave Heating ◽  
Copper Removal

Copper removal from aqueous solutions using nano-scale diboron trioxide/titanium dioxide (B2O3/TiO2) adsorbent

2012 ◽  
Vol 183 ◽  
pp. 294-302 ◽  
Author(s):  
Badriya Al-Rashdi ◽  
Chedly Tizaoui ◽  
Nidal Hilal
Keyword(s):  
Titanium Dioxide ◽  
Aqueous Solutions ◽  
Copper Removal ◽  
Nano Scale

Performance and characterization of calcined colloidal pyrite used for copper removal from aqueous solutions in a fixed bed column

2014 ◽  
Vol 130 ◽  
pp. 82-87 ◽  
Author(s):  
Tianhu Chen ◽  
Yan Yang ◽  
Ping Li ◽  
Haibo Liu ◽  
Jingjing Xie ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Fixed Bed ◽  
Copper Removal ◽  
Fixed Bed Column

Copper removal from aqueous solutions using a polyelectrolyte derived from sunflower oil: Physico-chemical aspects

2017 ◽  
Vol 5 (6) ◽  
pp. 5512-5520 ◽  
Author(s):  
Quelen Bulow Reiznautt ◽  
Irene Teresinha Santos Garcia ◽  
Bruna Girelli Furlanetto ◽  
Luiz Mario Angeloni ◽  
Dimitrios Samios
Keyword(s):  
Aqueous Solutions ◽  
Sunflower Oil ◽  
Copper Removal ◽  
Physico Chemical

Mechanism of Copper Removal from SiO[sub 2] Surfaces by Hydrogen Cyanide Aqueous Solutions

2006 ◽  
Vol 153 (5) ◽  
pp. G394 ◽  
Author(s):  
Naozumi Fujiwara ◽  
Yueh-Ling Liu ◽  
Masao Takahashi ◽  
Hikaru Kobayashi
Keyword(s):  
Aqueous Solutions ◽  
Hydrogen Cyanide ◽  
Copper Removal

scholarly journals In Situ Modification of Activated Carbons by Oleic Acid under Microwave Heating to Improve Adsorptive Removal of Naphthalene in Aqueous Solutions

Processes ◽  
2021 ◽  
Vol 9 (2) ◽  
pp. 391
Author(s):  
Zhansheng Wu ◽  
Pengyun Liu ◽  
Zhilin Wu ◽  
Giancarlo Cravotto
Keyword(s):  
Oleic Acid ◽  
Aqueous Solutions ◽  
Adsorption Capacity ◽  
Microwave Heating ◽  
Column Height ◽  
Batch Adsorption ◽  
One Pot ◽  
Column Adsorption ◽  
Adsorption Data

This study aimed to improve the adsorption capacity of activated carbon (AC) towards naphthalene (NAP) in aqueous solutions. Starch-based AC (SAC) and pulverized coal-based AC (PCAC) were prepared in a one-pot procedure by activation with oleic acid and KOH under microwave heating. Brunauer–Emmett–Teller (BET) specific surface areas reached 725.0 and 912.9 m2/g for in situ modified SAC (O-SAC1) and PCAC (O-PCAC1), respectively. π–π bond, H-bond, and hydrophobic effects were directly involved in the NAP adsorption process. Batch adsorption data were well fitted by pseudo-second order kinetics and the Freundlich isotherm model. As compared to ACs prepared with only KOH activation, NAP adsorption capacities of PCAC and SAC prepared by the one-pot method increased by 16.9% and 13.7%, respectively. Influences of varying factors were investigated in column adsorption of NAP using O-SAC1 and O-PCAC1. Based on breakthrough curves analysis, the larger column height (H), lower flow rate (Q0), and lower initial concentration (C0) resulted in the longer breakthrough and exhaustion times in both cases. Specifically, we concluded that O-PCAC1 exhibits better adsorption capacity than O-SAC1 in the given conditions. The optimized operating parameters were 1 cm (H), 1 mL/min (Q0) and 30 mg/L (C0). Finally, column adsorption data could be well fitted by the Thomas model.

scholarly journals Evaluation of the Characteristics of Metal Nitrate Aqueous Solutions by Microwave Heating and the Morphologies of Synthesized Metal Oxide Powders

2020 ◽  
Vol 57 (9) ◽  
pp. 485-494
Author(s):  
Tomoomi Segawa ◽  
Koichi Kawaguchi ◽  
Katsunori Ishii ◽  
Masahiro Suzuki ◽  
Tomonori Fukasawa ◽  
...  
Keyword(s):  
Metal Oxide ◽  
Aqueous Solutions ◽  
Microwave Heating ◽  
Metal Nitrate ◽  
Oxide Powders

scholarly journals Optimization of Copper Removal from Aqueous Solutions Using Emulsion Liquid Membranes with Benzoylacetone as a Carrier

Metals ◽  
2017 ◽  
Vol 7 (1) ◽  
pp. 19 ◽  
Author(s):  
Loreto León ◽  
Gerardo León ◽  
Javier Senent ◽  
Carmen Pérez-Sirvent
Keyword(s):  
Aqueous Solutions ◽  
Copper Removal ◽  
Liquid Membranes ◽  
Emulsion Liquid Membranes

Optimization of copper removal from aqueous solutions in a continuous electrochemical cell divided by cellulosic separator

2016 ◽  
Vol 75 (5) ◽  
pp. 1233-1242 ◽  
Author(s):  
Ali Asghar Najafpoor ◽  
Mojtaba Davoudi ◽  
Elham Rahmanpour Salmani
Keyword(s):  
Energy Consumption ◽  
Aqueous Solutions ◽  
Removal Efficiency ◽  
Copper Concentration ◽  
Electrochemical Cell ◽  
Current Intensity ◽  
Copper Removal ◽  
Flow Mode ◽  
Electrolysis Time ◽  
Optimal Conditions

Copper, as an inseparable part of many industrial discharges, threatens both public and environmental health. In this work, an electrochemical cell utilizing a cellulosic separator was used to evaluate Cu removal using graphite anodes and stainless steel cathodes in a continuous-flow mode reactor. In the experimental matrix, Cu concentration (1–5 mg L−1), electrolysis time (20–90 min), and current intensity (0.1–0.4 A) were employed. Results showed that the maximum removal efficiency of copper was obtained as 99%. The removal efficiency was independent of initial copper concentration and directly related to electrolysis time and current intensity. Energy consumption was more dependent on current intensity than electrolysis time. Under optimal conditions (75.8 min electrolysis time, 0.18 A current intensity, and 3 mg L−1 copper concentration), the removal efficiency was obtained as 91% while 7.05 kWh m−3 electrical energy was consumed. The differences between the actual and predicted data under optimal conditions were 0.42% for copper removal and 0.23% for energy consumption, which signify the performance and reliability of the developed models. The results exhibited the suitability of the electrochemical reduction for copper removal from aqueous solutions, which was facilitated under alkaline conditions prevailing in the cathodic compartment due to applying a cell divided by a cellulosic separator.

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