Treatment of Dye Wastewater by Nano-Ferrous Modified Bentonite Assisted Advanced Oxidation Processes

2012 ◽  
Vol 486 ◽  
pp. 104-107
Author(s):  
Min Dong Zhang ◽  
Yan Fei Wei ◽  
Mei Huang
Keyword(s):  
Heterogeneous Catalyst ◽  
Advanced Oxidation Processes ◽  
Oxidation Process ◽  
Removal Rate ◽  
Advanced Oxidation ◽  
Dye Wastewater ◽  
Heterogeneous Fenton ◽  
Modified Bentonite ◽  
Oxidation Processes

Degradation of dye wastewater was studied by using nanoferrous modified bentonite as the heterogeneous catalyst for a Fenton-like oxidation. By comparing the effect of homogeneous Fenton reactions as well as heterogeneous Fenton-like process for nanomodified bentonite, it is found that the advanced oxidation processes assisted by nanoferrous/bentonite complexes exhibit the stronger degradation capacity. And the removal rate of Fenton-like reaction increased from 23.6% to 75.5% when the ferrous concentration increasing from 20 to 100mmol/L. Being compared with homogeneous Fenton reactions, 20% increased degradation efficiencies is obtained by Fenton-like oxidation process for nanomodified bentonite under 6g nanoferrous/bentonite complexes in 100mL dye wastewater.

Effect of Nano-Fe2O3/Goldmine Complex on Dyeing Wastewater Treatment

2014 ◽  
Vol 955-959 ◽  
pp. 335-338
Author(s):  
Jun Feng Hua ◽  
Min Dong Zhang ◽  
Mei Huang
Keyword(s):  
Wastewater Treatment ◽  
Heterogeneous Catalyst ◽  
Advanced Oxidation Processes ◽  
Removal Rate ◽  
Advanced Oxidation ◽  
Dyeing Wastewater ◽  
Oxidation Processes ◽  
Chemical Coprecipitation ◽  
Waste Solid

Nano-Fe2O3/goldmine complex was obtained by chemical coprecipitation on the surface of goldmine waste-solid. And its application as the heterogeneous catalyst in Fenton-like advanced oxidation processes (AOPs) was discussed for the degradation of dyeing wastewater. It was found that advanced oxidation processes play an important role to the removal of dyeing wastewater. And the best removal rate of 15400mg/L dyeing wastewater reached up to 63.1% with the presence of 50g/L dosage of nano-Fe2O3/goldmine complex and 50mL/L concentration of H2O2at 50°C with pH=3.

Advanced Oxidation Processes in Azo Dye Wastewater Treatment

2006 ◽  
Vol 78 (6) ◽  
pp. 572-579 ◽  
Author(s):  
Sanja Papić ◽  
Natalija Koprivanac ◽  
Ana Lončarić Božić ◽  
Dinko Vujević ◽  
Savka Kučar Dragičević ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Azo Dye ◽  
Advanced Oxidation Processes ◽  
Advanced Oxidation ◽  
Dye Wastewater ◽  
Oxidation Processes

An insight into the effective advanced oxidation process for treatment of simulated textile dye waste water

RSC Advances ◽  
2014 ◽  
Vol 4 (75) ◽  
pp. 39941-39947 ◽  
Author(s):  
Jhimli Paul Guin ◽  
D. B. Naik ◽  
Y. K. Bhardwaj ◽  
Lalit Varshney
Keyword(s):  
Waste Water ◽  
Advanced Oxidation Processes ◽  
Advanced Oxidation Process ◽  
Oxidation Process ◽  
Advanced Oxidation ◽  
Textile Dye ◽  
Oxidation Processes ◽  
Insight Into

The comparison in the extent of % mineralization of Simulated Textile Dye Waste Water (STDWW) in three Advanced Oxidation Processes.

scholarly journals Decomplexation of electroplating wastewater by ozone-based advanced oxidation process

2018 ◽  
Vol 79 (3) ◽  
pp. 589-596 ◽  
Author(s):  
Zhuoyue Wang ◽  
Ji Li ◽  
Wei Song ◽  
Xiaolei Zhang ◽  
Jiangyu Song
Keyword(s):  
Citric Acid ◽  
Advanced Oxidation Processes ◽  
Heavy Metal Contamination ◽  
Advanced Oxidation Process ◽  
Oxidation Process ◽  
Ethylenediaminetetraacetic Acid ◽  
Advanced Oxidation ◽  
Electroplating Wastewater ◽  
Oxidation Processes ◽  
Terrestrial Life

Abstract Heavy metal contamination from electroplating wastewater is a serious risk to terrestrial life and public health. The complexed metal cannot be effectively removed by traditional precipitation without decomplexing. In this work, four ozone-based advanced oxidation processes, O3, O3/H2O2, O3/UV and O3/H2O2/UV to decomplex electroplating wastewater were investigated and their performance compared. Ethylenediaminetetraacetic acid (EDTA) and citric acid are the most common components of electroplating wastewater. They were used as representatives to study the decomplexation and mineralization of complexes in the ozone-based advanced oxidation processes. Among all, the highest degradation and mineralization efficiency of EDTA occurred in O3/UV and was 65% and 53% in 60 min, respectively. For citric acid, the highest degradation (77%) and mineralization (56%) efficiency was observed in the O3/H2O2/UV process. This indicates that selection of the advanced oxidation process is determined by the target contaminant.

Advanced oxidation process–biological system for wastewater containing a recalcitrant pollutant

2007 ◽  
Vol 55 (12) ◽  
pp. 229-235 ◽  
Author(s):  
I. Oller ◽  
S. Malato ◽  
J.A. Sánchez-Pérez ◽  
M.I. Maldonado ◽  
W. Gernjak ◽  
...  
Keyword(s):  
Advanced Oxidation Processes ◽  
Advanced Oxidation Process ◽  
Catalyst Concentration ◽  
Oxidation Process ◽  
Advanced Oxidation ◽  
Ozone Treatment ◽  
Saline Wastewater ◽  
Oxidation Processes ◽  
Oxidative Processes ◽  
Parabolic Collector

Two advanced oxidation processes (AOPs), ozonation and photo-Fenton, combined with a pilot aerobic biological reactor at field scale were employed for the treatment of industrial non-biodegradable saline wastewater (TOC around 200 mg L−1) containing a biorecalcitrant compound, α-methylphenylglycine (MPG), at a concentration of 500 mg L−1. Ozonation experiments were performed in a 50-L reactor with constant inlet ozone of 21.9 g m−3. Solar photo-Fenton tests were carried out in a 75-L pilot plant made up of four compound parabolic collector (CPC) units. The catalyst concentration employed in this system was 20 mg L−1 of Fe2 +  and the H2O2 concentration was kept in the range of 200–500 mg L−1. Complete degradation of MPG was attained after 1,020 min of ozone treatment, while only 195 min were required for photo-Fenton. Samples from different stages of both AOPs were taken for Zahn–Wellens biocompatibility tests. Biodegradability enhancement of the industrial saline wastewater was confirmed (>70% biodegradability). Biodegradable compounds generated during the preliminary oxidative processes were biologically mineralised in a 170-L aerobic immobilised biomass reactor (IBR). The global efficiency of both AOP/biological combined systems was 90% removal of an initial TOC of over 500 mg L−1.

scholarly journals ADVANCED OXIDATION PROCESS (AOPS) FOR MICROPOLLUTANT TREATMENT: A REVIEW

2017 ◽  
Vol 14 (27) ◽  
pp. 65-74
Author(s):  
Fernando J. M. KUFFEL ◽  
Cassiano R. BRANDT ◽  
Daniel KUHN ◽  
Clarice STEFFENS ◽  
Simone STULP ◽  
...  
Keyword(s):  
Advanced Oxidation Processes ◽  
Advanced Oxidation Process ◽  
Oxidation Process ◽  
Complex Structure ◽  
Advanced Oxidation ◽  
New Order ◽  
Oxidation Processes ◽  
Rivers And Lakes ◽  
Application Characteristics ◽  
Made In

The growing preoccupation about drinking water quality available on earth, a new order of emergent pollutants in rivers and lakes has called the attention of the scientific community, the micropollutants. These compounds come from the irregular or involuntary ejectment of substances such as pesticides, drugs, insecticides and other into the nature. By having a complex structure, the micropollutants have high resistance over the traditional water treatment to human consume. Thus, alternatives methodologies to their degradation have been studied, such as advanced oxidation process (AOPs). The AOPs are based in the formation of hydroxyls radicals (OH-) highly reactive that degrade complexes substances into lesser aggressive products as CO2 and water. Even though many methods to generate hydroxyls radicals from advanced oxidation processes exist, they differentiate on the application and viability. This review shows different methodologies using AOPs and their respective application characteristics, also some works already made in complexes substances treatment, which prove their efficiency.

scholarly journals Decomposition of Contaminants of Emerging Concern in Advanced Oxidation Processes

Water ◽  
2018 ◽  
Vol 10 (7) ◽  
pp. 955 ◽  
Author(s):  
Edyta Kudlek
Keyword(s):  
Advanced Oxidation Processes ◽  
Removal Rate ◽  
Diclofenac Sodium ◽  
Food Additives ◽  
Advanced Oxidation ◽  
Butylated Hydroxytoluene ◽  
Contaminants Of Emerging Concern ◽  
Water Solutions ◽  
Oxidation Processes ◽  
By Products

This paper compares the removal degrees of selected contaminants of emerging concern in water solutions during advanced oxidation processes (AOPs), such as H2O2, O3, UV, UV/TiO2, UV/H2O2, and UV/O3. The tested micropollutants belong to the following groups: pharmaceuticals, dyes, UV filters, hormones, pesticides, and food additives. The highest removal rate of pharmaceutical compounds was observed during the UV/TiO2 process. The decomposition of hormones in this process exceeded 96% and the concentration of the UV filter dioxybenzone was reduced by 75%. The pesticide triallat and the food additive butylated hydroxytoluene were most effectively oxidized by the UV process and their removal degrees exceeded 90%. The lowest removal degree in all examined processes was observed in the case of caffeine. Toxicological analysis conducted in post-processed water samples indicated the generation of several oxidation by-products with a high toxic potential. The presence of those compounds was confirmed by the GC-MS analysis. The performance of the UV/O3 process leads to the increase of the toxicity of post-processed water solutions, especially solutions containing degradation by-products of carbamazepine, diclofenac sodium salt, acridine, trialatte, triclosan, and β-estradiol were characterized by high toxicity.

Nano-Iron Hydroxides/Oxides Modified Slag on the Treatment of Simulated Methyl Orange Wastewater

2012 ◽  
Vol 583 ◽  
pp. 383-386
Author(s):  
Yan Fei Wei ◽  
Min Dong Zhang ◽  
Mei Huang
Keyword(s):  
Methyl Orange ◽  
Advanced Oxidation Processes ◽  
Removal Rate ◽  
Advanced Oxidation ◽  
Iron Hydroxides ◽  
Oxidation Processes ◽  
Adsorption Treatment

Degradation of simulated methyl orange (MO) was studied by combined adsorption treatment and advanced oxidation processes with nano-iron hydroxides/oxides modified slag. The adsorption treatment of nano-iron hydroxides/oxides/slag shows that with the increased of adsorbent from 0.1% to 0.5%, the removal of MO can change from 23.2% to 92.8%. While combination of the adsorption treatment and the advanced oxidation processes exhibits the enhanced disposal ability, in which the removal rate of MO changed from 23.2% to 99.9%.

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