scholarly journals Advanced Oxidation Based Treatment of Soil Wash Water Contaminated with Sulfolane

Water ◽  
2019 ◽  
Vol 11 (10) ◽  
pp. 2152 ◽  
Author(s):  
Mariana Brandão ◽  
Linlong Yu ◽  
Carlos Garcia ◽  
Gopal Achari
Keyword(s):  
Soil Water ◽  
Extraction Procedure ◽  
Soil Washing ◽  
Advanced Oxidation ◽  
Wash Water ◽  
Optimum Conditions ◽  
Fenton Reagent ◽  
Treatment Techniques ◽  
Washing Water ◽  
Washing Solvent

This study investigates advanced oxidation processes (AOPs) as post-treatment techniques to degrade sulfolane in soil washing water. Soil washing experiments were conducted with different soil/water ratios, shaking times, and number of extraction cycles. The soil wash water containing sulfolane was treated with four AOPs including H2O2/ultraviolet (UV), O3/UV, alkaline ozonation, and neutral Fenton reagent. Results show that sulfolane can be effectively removed from the soil using water as a washing solvent, where optimum conditions were found with 30 min of vigorous shaking, using 1:2 soil/water mass ratio, and a three-cycle extraction procedure. Moreover, the sulfolane in the soil wash water was also effectively degraded using appropriate AOPs. Among the four AOPs investigated, neutral Fenton was the least effective method to treat sulfolane in the wash water, while H2O2/UV, O3/UV, and alkaline ozonation can achieve more than 99% of sulfolane degradation within 1 h.

Degradation of chlorpyriphos in water by advanced oxidation processes

2010 ◽  
Vol 10 (1) ◽  
pp. 1-6 ◽  
Author(s):  
R. Murillo ◽  
J. Sarasa ◽  
M. Lanao ◽  
J. L. Ovelleiro
Keyword(s):  
Reaction Time ◽  
Light Source ◽  
Advanced Oxidation Processes ◽  
Advanced Oxidation ◽  
The Other ◽  
Molar Ratio ◽  
Optimum Conditions ◽  
Oxidation Processes ◽  
Other Hand ◽  
Initial Ph

The degradation of chlorpyriphos by different advanced oxidation processes such as photo-Fenton, TiO2, TiO2/H2O2, O3 and O3/H2O2 was investigated. The photo-Fenton and TiO2 processes were optimized using a solar chamber as light source. The optimum dosages of the photo-Fenton treatment were: [H2O2]=0.01 M; [Fe3 + ]=10 mg l−1; initial pH = 3.5. With these optimum conditions total degradation was observed after 15 minutes of reaction time. The application of sunlight was also efficient as total degradation was achieved after 60 minutes. The optimum dosage using only TiO2 as catalyst was 1,000 mg l−1, obtaining the maximum degradation at 20 minutes of reaction time. On the other hand, the addition of 0.02 M of H2O2 to a lower dosage of TiO2 (10 mg l−1) provides the same degradation. The ozonation treatment achieved complete degradation at 30 minutes of reaction time. On the other hand, it was observed that the degradation was faster by adding H2O2 (H2O2/O3 molar ratio = 0.5). In this case, total degradation was observed after 20 minutes.

Emerging investigator series: onsite recycling of saline–alkaline soil washing water by forward osmosis: techno-economic evaluation and implication

2020 ◽  
Vol 6 (10) ◽  
pp. 2881-2890
Author(s):  
Zhicheng Xu ◽  
Ming Xie ◽  
Jung Eun Kim ◽  
Nazmul Huda ◽  
Zideng Gao ◽  
...  
Keyword(s):  
Economic Evaluation ◽  
Forward Osmosis ◽  
Soil Washing ◽  
Economic Feasibility ◽  
Alkaline Soil ◽  
Draw Solution ◽  
Washing Water

This study investigated the techno-economic feasibility of forward osmosis (FO) for onsite recycling of saline–alkaline soil washing water with an all-purpose liquid fertiliser as a draw solution.

scholarly journals Removal of Direct Yellow 12 from Water Samples by Cloud Point Extraction Using Triton X-100 as Nonionic Surfactant

2011 ◽  
Vol 8 (4) ◽  
pp. 1588-1595 ◽  
Author(s):  
Shahnaz Abedi ◽  
Farzin Nekouei
Keyword(s):  
Nonionic Surfactant ◽  
Cloud Point ◽  
Salt Concentration ◽  
Water Samples ◽  
Cloud Point Extraction ◽  
Extraction Procedure ◽  
Optimum Conditions ◽  
Single Extraction ◽  
Triton X

A surfactant mediated cloud point extraction (CPE) procedure has been developed to remove color from wastewater containing direct yellow 12 (Chrysophenine G), using triton x-100 (TX-100) as nonionic surfactant. The effects of the concentration of the surfactant, pH, temperature and salt concentration on the different concentration of dye have been studied and optimum conditions were obtained for the removal of direct yellow 12 (DY 12). The concentration of DY 12 in the dilute phase was measured using UV-Vis spectrophotometer. It was found that the separation of phases was complete and the recovery of DY 12 was very effective in the presence of NaCl as an electrolyte. The results showed that up to 600 mg L−1of DY 12 can quantitatively be removed (>96%) by Cloud point extraction procedure in a single extraction using optimum conditions.

Synergetic Degradation of Enzyme-Fenton Reagent for Methyl Orange

2014 ◽  
Vol 1010-1012 ◽  
pp. 84-87
Author(s):  
Bin Yao ◽  
Zun Mian Xu ◽  
Cheng An Tao ◽  
Jian Fang Wang
Keyword(s):  
Methyl Orange ◽  
Degradation Rate ◽  
Ph Value ◽  
Uv Light ◽  
Degradation Efficiency ◽  
Optimum Conditions ◽  
Fenton Reagent ◽  
Effects Of Ph ◽  
Simulated Wastewater ◽  
Catalytic Effects

The effects of pH adjustment method, pH value, UV light, catalase and Fenton reagent on the degradation efficiency of enzyme-Fenton reagent for methyl orange (MO) were investigated, and the synergetic catalytic effects of catalase and Fenton reagent on the catalytic oxidation for methyl orange were found. When under no UV-light, the enzyme can enhance the degradation efficiency of Fenton reagent. The optimum conditions for degrading methyl orange simulated wastewater whose concentration is 0.1 g/L at room temperature are obtained as follows: the pH is tuned with H2SO4, pH is 3.0, concentration of catalase is 5 μg / mL, concentration of H2O2is 0.01%, concentration of FeSO4is 1.8μmol / L. The degradation rate can reach 98% in 60min. When under UV light at the same condition, the degradation rate can reach 94% in only 15min.

scholarly journals CARACTERIZAÇÃO FÍSICO-QUÍMICA E BACTERIOLÓGICA DOS RESÍDUOS DE ETA: A IMPORTÂNCIA DO SEU ESTUDO

2014 ◽  
Vol 39 (1) ◽  
pp. 81
Author(s):  
Rubia P. L. Camargo ◽  
Orlene S. Costa ◽  
Ítalo L. Fernandes ◽  
Patrícia F. Góis ◽  
Renato C. Silva ◽  
...  
Keyword(s):  
Wash Water ◽  
Standard Methods ◽  
Quality Class ◽  
Need For Treatment ◽  
Waste Sludge ◽  
Physical Chemical ◽  
Water And Wastewater ◽  
Water Filters ◽  
Washing Water ◽  
Proper Disposal

The treatment of water from Anapolis - GO generates as major waste sludge in the decanter after alkalinization, coagulation, flocculation and sedimentation, and washing water after backwashing of the filters themselves. This work was carried out physical-chemical and bacterial waste by means of the methods prescribed in Standard Methods for the Examination of Water and Wastewater. The results indicate the need for treatment and proper disposal of sludge to the decanter, as its parameters do not meet the standards required for discharge of effluents into water bodies. While the characteristics of the wash water filters are close to the standards of water quality class 2, set by the CONAMA Resolution 357. These results demonstrate the need and the importance to waste characterization.

scholarly journals DEKOLORISASI AIR LIMBAH PENGOLAHAN GURITA MENGGUNAKAN METODE AOT(ADVANCE OXIDATION TREATMENT) DENGAN REAGEN FENTON

2018 ◽  
Vol 3 (1) ◽  
pp. 6
Author(s):  
Ganden Supriyanto ◽  
Khoirun Nisak R ◽  
Abdulloh Abdulloh
Keyword(s):  
Key Words ◽  
Hydroxyl Radicals ◽  
Main Parameter ◽  
Advanced Oxidation ◽  
H2o2 Concentration ◽  
Fenton Reagent ◽  
Oxidation Treatment ◽  
Maximum Decolorization

ABSTRACT This research aims to determine the effectiveness of Advance Oxidation Treatment (AOT) method with the use of Fenton reagent in decolorization of octopus canning wastewater’s red colour. The use of Fenton reagent (H2O2 and Fe2+) will produce hydroxyl radicals (∙OH) that will oxidize the red colour so the octopus canning wastewater to be colourless and safe to discharged into the environment. Determination of octopus canning wastewater's decolorization is done by determining the change of red color's intensity using Pt/Co scale. The main parameter in determining the decolorization of octopus canning wastewater using Advanced Oxidation Treatment (AOT) with Fenton reagent are time, concentration of Fe2+, concentration of H2O2, and pH. The maximum decolorization of octopus canning wastewater was reached at following condition rarely 55 minutes, with Fe2+ concentration of 42,86 ppm, H2O2 concentration of 85,71 ppm, and pH 4. With a capacity of red color’s decolorization is 49,08 %. Key words : Advance Oxidation Treatment (AOT), decolorization, Fenton reagent    ABSTRAK Penelitian ini bertujuan untuk mengetahui efektifitas metode Advance Oxidation Treatment  (AOT)  dengan menggunaan reagen Fenton dalam mendekolorisasi warna merah yang terdapat dalam air limbah pengolahan gurita. Penggunaan reagen Fenton (H2O2 dan Fe2+) akan menghasilkan radikal hidroksil (∙OH) yang bisa menghilangkan warna merah yang terdapat di dalam limbah sehingga limbah menjadi tidak berwarna dan aman untuk dibuang ke lingkungan. Penentuan dekolorisasi air limbah pengolahan gurita dilakukan dengan menentukan perubahan intensitas warna merah menggunakan skala Pt/Co. Parameter utama yang digunakan dalam metode Advance Oxidation Treatment  (AOT) adalah waktu, konsentrasi Fe2+, konsentrasi H2O2, dan pH. Hasil optimum dari dekolorisasi air limbah pengolahan gurita adalah pada waktu 55 menit, konsentrasi Fe2+ 42,86 ppm, konsentrasi H2O2 85,71 ppm, dan pH 4. Dengan kapasitas dekolorisasi warna merah sebesar 49,08 %. Kata kunci  : Advance Oxidation Treatment  (AOT), dekolorisasi, reagen Fenton 

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