Degradation of atrazine by modified stepwise-Fenton’s processes

Chu, Wei; Chan, KH; Kwan, C. Y.; Choi, Ky Y.

doi:10.1016/j.chemosphere.2006.10.039

Cited by 53 publications

(32 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Because Fenton's oxidation process yields satisfactory final effluents, in recent years this technology has been applied to many environmental problems such as further treatment of organics in anaerobically treated leachate by Fenton coagulation [11], advanced treatment of opium alkaloid industry effluents using Fenton's oxidation [9], treatment of methyl tertiary-butyl ether (MTBE) contaminated wastewaters using Fenton's reagent [10], oxidation of aromatic groundwater contaminants [12], treatment of water-based paint wastewater with Fenton process [13], advanced oxidation of olive-oil mills wastewater [14], and removal of atrazine by step-wise Fenton's processes [15].…”

Section: Introductionmentioning

confidence: 99%

Improvement of COD and color removal from UASB treated poultry manure wastewater using Fenton's oxidation

Yetilmezsoy¹,

Sakar²

2008

Journal of Hazardous Materials

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 99%

Improvement of COD and color removal from UASB treated poultry manure wastewater using Fenton's oxidation

Yetilmezsoy¹,

Sakar²

2008

Journal of Hazardous Materials

View full text Add to dashboard Cite

“…The mechanism of the photolysis of atrazine under UV radiation has been well studied (Klamerth et. al 2009;Chu et. al 2007) The possible mechanism of photolysis suggests that in the first step, fast de-chlorination of atrazine occurs rapidly.…”

Section: Influence Of Ph and Time On The Photolytic Process Of Mw-uvmentioning

confidence: 94%

“…Ozone-based oxidation processes, along with hydrogen peroxide, Mn (II), or ultraviolet (UV) (Mahmud & Freire, 2007), and other advanced oxidation processes, such as photocatalysis (Fitzpatrick & Ibhadon 2013Chong et al 2010Luan et al 2010;Parra et al 2004;Klamath et al 2009;Chu et al 2007Yola et al 2014, hydrogen peroxide, photolysis (Sanchez et al 2010), and the photo-Fenton process (Jiménez 2011) Fentone were also investigated in recent years. However, for the degradation of persistent compounds, advanced oxidation processes have been increasingly studied (Nogueira et al 2007;Chamberlain et al 2012).…”

Section: Introductionmentioning

confidence: 98%

Evaluation of atrazine degradation applied to different energy systems

Moreira

Pinheiro

Araújo

et al. 2016

Environ Sci Pollut Res

View full text Add to dashboard Cite

Atrazine is an herbicide widely used in crops and has drawn attention due to potential pollution present in soil, sediment, water, and food. Since conventional methods are not potentially efficient to persistent degradation of organic compounds, new technology has been developed to remove them, especially practices utilizing advanced oxidation processes (AOPs). This work aims to evaluate the use of different energies (ultraviolet (UV), microwaves (MW), and radiations (MW-UV)) to the herbicide atrazine through the process of photo-oxidation. These systems found degradation rates of around 12 % (UV), 28 % (MW), and 83 % (MW-UV), respectively, with time intervals of 120 s. After the photolytic processes, the samples were analyzed at a wavelength scanning the range of 190 to 300 nm, where the spectral analysis of the signal was used to evaluate the degradation of atrazine and the appearance of some other peaks (degradation products). The spectrum evaluation resulting from photolytic processes gave rise to a new signal which was confirmed by chromatography. This spectrum indicated the possible pathway of atrazine degradation by the process of photolytic MW-UV, generating atrazine-2-hydroxy, atrazine-desethyl-2-hidroxy, and atrazine-desisopropyl-2-hydroxy. The process indicated that in all situations, chloride was present in the analytic structure and was substituted by a hydroxyl group, which lowered the toxicity of the compound through the photolytic process MW-UV. Chromatographic analysis ascertained these preliminary assessments using spectrophotometry. It was also significantly observed that the process can be optimized by adjusting the pH of the solution, which was evident by an improvement of 10 % in the rate of degradation when subjected to a pH solution equal to 8.37.

show abstract

“…However, actually many reactions cannot be simply fitted by the simple order models such as the first-and the second-order models [15]. Some researchers would rather subdivide the reaction period into two or three phases to fit the experimental data using the first-order model separately with different values of kinetic constant (k) [16]. This approach may well simulate the experimental data mathematically, but not chemically.…”

Section: Introductionmentioning

confidence: 98%