Treatment of agrochemical wastewater by subcritical water oxidation method: chemical composition and ion analysis of treated and untreated samples

2020 ◽  
Vol 55 (12) ◽  
pp. 1424-1435
Author(s):  
Erdal Yabalak ◽  
A. Murat Gizir
Keyword(s):  
Chemical Composition ◽  
Water Oxidation ◽  
Subcritical Water ◽  
Oxidation Method ◽  
Ion Analysis

scholarly journals Degradation, dephenolisation and dearomatisation of olive mill wastewater by subcritical water oxidation method using hydrogen peroxide: Application of multi-response central composite design

2018 ◽  
Vol 83 (4) ◽  
pp. 489-502 ◽  
Author(s):  
Erdal Yabalak ◽  
Özkan Görmez ◽  
Belgin Sönmez
Keyword(s):  
Central Composite Design ◽  
Water Oxidation ◽  
Treatment Time ◽  
Subcritical Water ◽  
Oxygen Demand ◽  
Temperature Treatment ◽  
Olive Mill Wastewater ◽  
Oxidation Method ◽  
Central Composite ◽  
Olive Mill

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.

scholarly journals Application of the eco-friendly subcritical water oxidation method in the degradation of epichlorohydrin

2019 ◽  
Vol 84 (7) ◽  
pp. 757-767 ◽  
Author(s):  
Erdal Yabalak ◽  
İpek Topaloğlu ◽  
Ahmet Gizir
Keyword(s):  
Hydrogen Peroxide ◽  
Water Oxidation ◽  
Treatment Time ◽  
Subcritical Water ◽  
P Value ◽  
Oxidation Method ◽  
Toc Removal ◽  
Oxidant Concentration ◽  
Experimental Process ◽  
Central Composite

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.

scholarly journals Measurement methods of total organic carbon in seawater

2021 ◽  
Vol 233 ◽  
pp. 01078
Author(s):  
Shuwei Zhang ◽  
Zhaoyu Wang ◽  
Xuejiao Yan ◽  
Jing Wang ◽  
Li Zhang ◽  
...  
Keyword(s):  
High Temperature ◽  
Organic Carbon ◽  
Total Organic Carbon ◽  
Water Oxidation ◽  
Combustion Method ◽  
Oxidation Method ◽  
Persulfate Oxidation ◽  
Temperature Combustion ◽  
Oxidation Efficiency ◽  
High Temperature Combustion

Total organic carbon (TOC) can reflect the total amount of organic matter in water. This paper introduces the common methods of measuring organic carbon, including high temperature combustion method, potassium persulfate oxidation method, spectrometry, ozone oxidation chemiluminescence method, supercritical water oxidation method and so on. At present, high temperature combustion method is the most widely used method for TOC measurement in seawater, because of its high oxidation efficiency. TOC sensor needs to be developed to realize in-situ and long-term monitoring.

Sign in / Sign up

Export Citation Format

Share Document