scholarly journals Multi-response central composite design of the mineralization and removal of aniline by subcritical water oxidation method

2019 ◽  
Vol 10 (2) ◽  
pp. 97-105 ◽  
Author(s):  
Erdal Yabalak ◽  
İpek Topaloğlu ◽  
Ahmet Murat Gizir
2018 ◽  
Vol 83 (4) ◽  
pp. 489-502 ◽  
Author(s):  
Erdal Yabalak ◽  
Özkan Görmez ◽  
Belgin Sönmez

An environmentally friendly method to decontaminate the olive mill wastewater, which is encountered as a major environmental problem is presented in this study. The removal of both polyphenolic and aromatic content and the degradation of wastewater of olive mill supplied from Mersin/Turkey region were investigated by the subcritical water oxidation method using H2O2. The central composite design of response surface methodology was used to assess the effects of temperature, treatment time, and the concentration of oxidising agent. The reliability of the employed method was proved by ANOVA. The optimum experimental parameters were determined and theoretical equations were proposed in each case. The highest chemical oxygen demand removal, dephenolisation and dearomatisation values were obtained as 85.74, 96.13 and 95.94 %, respectively.


2019 ◽  
Vol 84 (7) ◽  
pp. 757-767 ◽  
Author(s):  
Erdal Yabalak ◽  
İpek Topaloğlu ◽  
Ahmet Gizir

Degradation of epichlorohydrin was investigated using subcritical water oxidation method in the presence of hydrogen peroxide. Degradation rate was monitored by means of total organic carbon (TOC) analysis. The central composite design was used to determine optimal TOC removal conditions and modelling experimental process. The effects of all experimental variables (temperature, oxidant concentration of hydrogen peroxide and treatment time) on the TOC removal rates were evaluated and the theoretical prediction model was proposed. Reliability of the employed model was evaluated using ANOVA. F value and the p-value of the model were found to be 84.60 and <0.0001, respectively. 93.78 % of TOC removal was achieved in the degradation of epichlorohydrin at 373 K of temperature and 75 min of treatment time using 90 mM of H2O2.


2016 ◽  
Vol 52 (21) ◽  
pp. 4068-4071 ◽  
Author(s):  
Alexander Weremfo ◽  
Xunyu Lu ◽  
Paul Carter ◽  
D. Brynn Hibbert ◽  
Chuan Zhao

The use of a central composite design to model the roughness of an electrochemically roughened Pt electrode and the surface with a well-defined nanostructure exhibits greatly improved catalytic activity towards oxygen evolution reaction.


Author(s):  
Siti Nur Khairunisa Mohd Amir ◽  
Mariam Firdhaus Mad Nordin ◽  
Kamyar Shameli ◽  
Izzati Mohamad Abdul Wahab ◽  
Mariani Abdul Hamid

2009 ◽  
Vol 00 (00) ◽  
pp. 090721051030036-8
Author(s):  
Jaleh Varshosaz ◽  
Solmaz Ghaffari ◽  
Mohammad Reza Khoshayand ◽  
Fatemeh Atyabi ◽  
Shirzad Azarmi ◽  
...  

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