scholarly journals Optimization of a heterogeneous catalytic hydrodynamic cavitation reactor performance in decolorization of Rhodamine B: Application of scrap iron sheets

2013 ◽  
Vol 20 (6) ◽  
pp. 1442-1449 ◽  
Author(s):  
Jalal Basiri Parsa ◽  
Seyyed Alireza Ebrahimzadeh Zonouzian
Keyword(s):  
Rhodamine B ◽  
Hydrodynamic Cavitation ◽  
Reactor Performance ◽  
Heterogeneous Catalytic ◽  
Scrap Iron

scholarly journals The removal of Rhodamine B by H2O2 or ClO2 combined with hydrodynamic cavitation

2019 ◽  
Vol 80 (8) ◽  
pp. 1571-1580
Author(s):  
Kun Wang ◽  
Ri-ya Jin ◽  
Yi-na Qiao ◽  
Zeng-di He ◽  
Ying Wang ◽  
...  
Keyword(s):  
Water Pollution ◽  
Human Health ◽  
Rhodamine B ◽  
Removal Rate ◽  
Hydrodynamic Cavitation ◽  
Operating Parameters ◽  
Initial Ph ◽  
The Individual ◽  
Better Than ◽  
Maximum Removal

Abstract Rhodamine B (RhB), widely used as an industrial dye, is a toxic organic that is hazardous to human health and can cause water pollution. In this study, the removal rate of RhB was investigated by the following methods: hydrodynamic cavitation (HC) operated individually, and HC combined with oxidants H2O2 or ClO2. The effect of different operating parameters including pressure (2–6 bar) and initial pH (2–8) on the extent of degradation was investigated using an orifice plate as the cavitation device to achieve maximum removal of RhB. Under the parameters of HC, the effect of different loadings was investigated: H2O2 (n(RhB):n(H2O2) was varied from 1:17.60 to 1:211.28) and ClO2 (n(RhB):n(ClO2) was varied from 1:8.87 to 1:177.53). A combination of cavitation and H2O2 or ClO2 resulted in degradations of 80.6% and 95.3%. The results indicated that the combination of HC and oxidants was better than the individual HC process for the degradation of RhB. When combining HC with H2O2 or ClO2, the synergistic coefficients of 62.54 and 74.79 were obtained. The combination of HC and ClO2 was proven to be more effective for the removal of RhB compared to HC alone and the hybrid process of HC and H2O2.

scholarly journals A facile heterogeneous system for persulfate activation by CuFe2O4 under LED light irradiation

RSC Advances ◽  
2019 ◽  
Vol 9 (55) ◽  
pp. 32328-32337
Author(s):  
Xin Zhong ◽  
Xiao-Yu Ye ◽  
Di Wu ◽  
Kai-Xin Zhang ◽  
Wei Huang
Keyword(s):  
Catalytic System ◽  
Rhodamine B ◽  
Heterogeneous System ◽  
Light Irradiation ◽  
Led Light ◽  
Heterogeneous Catalytic ◽  
Heterogeneous Catalytic System ◽  
Persulfate Activation

In this study, the removal performance for rhodamine B (RB) by persulfate (PS) activated by the CuFe2O4 catalyst in a heterogeneous catalytic system under LED light irradiation was investigated.

Enhancing the Degradation of Rhodamine B by Hydrodynamic Cavitation with CCl4 Augmentation

2013 ◽  
Vol 864-867 ◽  
pp. 1244-1252
Author(s):  
Shu Jun Zhang ◽  
Li Shen ◽  
Wen Juan Gong
Keyword(s):  
Rhodamine B ◽  
Ph Value ◽  
Fold Increase ◽  
Hydrodynamic Cavitation ◽  
Inlet Pressure ◽  
Kinetic Rate ◽  
Ph Values ◽  
First Order Kinetics ◽  
Kinetic Rate Constants ◽  
Degradation Reaction

The degradation of Rhodamine B, a common pollutant existing in industrial wastewater, has been explored using a hydrodynamic cavitation reactor combined with CCl4treatment. The effects of CCl4concentration, operating pH values, inlet pressure, initial temperatures and initial RhB concentration were investigated. The result shows that the removal of RhB increases from 70.78% to 80.38% with increasing CCl4concentrations during hydrodynamic cavitation. Degradation of RhB with CCl4treatment increased as the operating pH value and its initial concentration decreased, a 7-fold increase (from 0.22×102min1to 1.68×102min1) in the kinetic rate constants were found at pH values ranging from 4.0 to 2.0. In addition, RhB degradation with CCl4treatment increased as the inlet pressure and temperature increased. From the present work, we conclude that the RhB degradation reaction follows a pseudo-first-order kinetics, and the mechanisms of CCl4enhancement are subsequently discussed.

scholarly journals CoFe/SBA-15 catalyst coupled with peroxymonosulfate for heterogeneous catalytic degradation of rhodamine B in water

2015 ◽  
Vol 36 (10) ◽  
pp. 1785-1797 ◽  
Author(s):  
Longxing Hu ◽  
Fan Yang ◽  
Lianpei Zou ◽  
Hang Yuan ◽  
Xing Hu
Keyword(s):  
Rhodamine B ◽  
Catalytic Degradation ◽  
Heterogeneous Catalytic

scholarly journals Treatment of rhodamine B with cavitation technology: comparison of hydrodynamic cavitation with ultrasonic cavitation

RSC Advances ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 5096-5106
Author(s):  
Yu-Fang Ye ◽  
Ying Zhu ◽  
Na Lu ◽  
Xin Wang ◽  
Zhi Su
Keyword(s):  
Rhodamine B ◽  
Ultrasonic Cavitation ◽  
Hydrodynamic Cavitation ◽  
Simulated Wastewater ◽  
Technology Comparison

This paper presents the use of hydrodynamic cavitation and ultrasonic cavitation technologies for treating rhodamine B (RhB) in simulated wastewater.

SEM analysis of the change in the reaction rates with deposit structures in the copper-iron cementation system

1978 ◽  
Vol 36 (1) ◽  
pp. 456-457
Author(s):  
V. Annamalai ◽  
L.E. Murr
Keyword(s):  
Structural Characteristics ◽  
Secondary Electron Emission ◽  
Copper Deposit ◽  
Reaction Rates ◽  
Sem Analysis ◽  
Experimental Conditions ◽  
Major Drawback ◽  
Emission Mode ◽  
Scrap Iron ◽  
Image Position

Economical recovery of copper metal from leach liquors has been carried out by the simple process of cementing copper onto a suitable substrate metal, such as scrap-iron, since the 16th century. The process has, however, a major drawback of consuming more iron than stoichiometrically needed by the reaction.Therefore, many research groups started looking into the process more closely. Though it is accepted that the structural characteristics of the resultant copper deposit cause changes in reaction rates for various experimental conditions, not many systems have been systematically investigated. This paper examines the deposit structures and the kinetic data, and explains the correlations between them.A simple cementation cell along with rotating discs of pure iron (99.9%) were employed in this study to obtain the kinetic results The resultant copper deposits were studied in a Hitachi Perkin-Elmer HHS-2R scanning electron microscope operated at 25kV in the secondary electron emission mode.

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