Photocatalytic degradation of reactive red 3 and alachlor over uncalcined Fe–TiO2 synthesized via hydrothermal method

Rivera, Kim Katrina P.; Luna, Mark Daniel G. de; Suwannaruang, Totsaporn; Wantala, Kitirote

doi:10.1080/19443994.2015.1125797

Cited by 7 publications

(1 citation statement)

References 36 publications

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“…VB holes (h+) migrate to the surface of the photocatalyst, where they react with water and hydroxide ions to form hydroxide radicals (OH • ), which are the primary oxidant in the photocatalytic oxidation of organic compounds [19,27]. The degradation of alachlor in aqueous solutions using different heterogeneous photocatalytic systems is relatively well-described in the literature [28][29][30][31][32][33][34][35]. On the other hand, less attention is paid to metolachlor and acetochlor, and their photocatalytic degradation has rarely been investigated [36][37][38][39].…”

Section: Introductionmentioning

confidence: 99%

Removal of Chloroacetanilide Herbicides from Water Using Heterogeneous Photocatalysis with TiO2/UV-A

et al. 2022

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Chloroacetanilide herbicides are widely used in the agricultural sector throughout the world. Because of their poor biodegradability, high water solubility, and long persistence, chloroacetanilide herbicides have a high potential to contaminate water, and conventional water treatment processes do not ensure sufficient removal. Therefore, heterogeneous photocatalysis using TiO2/UV-A was investigated for the degradation of alachlor, acetochlor, and metolachlor from water. Two commercially available TiO2 (P25 and AV-01) were used as photocatalysts. Different experimental setups were also tested. In addition, the toxicity of single herbicides and mixtures of their photocatalytic degradation products to the freshwater alga Chlorella kessleri was investigated via a growth inhibition test. The maximum removal efficiency for alachlor, acetochlor, and metolachlor was 97.5%, 93.1%, and 98.2%, respectively. No significant differences in the removal efficiency of chloroacetanilide herbicides were observed for the photocatalysts used. Although the concentrations of all herbicides during photocatalysis decreased, the toxicity of the resulting mixtures of degradation products increased or remained the same, indicating the formation of toxic degradation products.

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