TY - JOUR
T1 - Catalytic effect of γ-Al(OH)3, α-FeOOH, and α-Fe2O3 on the ozonation-based decomposition of diethyl phthalate adsorbed on sand and soil
AU - Ruiz, Jasiel A.
AU - Rodríguez, Julia Liliana
AU - Poznyak, Tatiana
AU - Chairez, Isaac
AU - Dueñas, Jaime
N1 - Publisher Copyright:
© 2020, Springer-Verlag GmbH Germany, part of Springer Nature.
PY - 2021/1
Y1 - 2021/1
N2 - Diethyl phthalate (DEP) is a pollutant which can be found on soils as a result of its widespread application in plastic industry. Soil contaminated with DEP requires the application of different chemical methods to attain its remediation. Among these methods, ozonation has proven to be effective against toxic soil pollutants. The presence of metal oxides in soil is a possible source of catalytic effect. In this study, it was analyzed the catalytic effect of goethite (α-FeOOH), hematite (α-Fe2O3), and gibbsite (γ-Al(OH)3) in combination with O3 to achieve DEP decomposition. The DEP elimination efficiency by ozonation on the sand increased according to the following order: without catalyst < γ-Al(OH)3 < α-Fe2O3 < α-FeOOH. Among these three oxides, goethite has the highest OH groups density. The reaction of OH groups and O3 favors the formation of oxidant species, such as O2•− and OH•. The effect of the moisture content, the catalyst concentration, and the type of soil (sand and calcined soil) were also studied. The latter had a significant influence on the total organic carbon (TOC) removal. The mineralization degree was 84% in the O3–soil system, while only 40% was obtained with O3–sand (α-FeOOH) in dry sand after 8 h of treatment. Calcined soil promoted the increase of TOC removal due to the presence of different metal oxides, which were active centers for O3 decomposition. The toxicity tests of the three reaction systems (O3–sand, O3–sand (α-FeOOH), and O3–soil) were evaluated on lettuce seed germination before and after DEP ozonation.
AB - Diethyl phthalate (DEP) is a pollutant which can be found on soils as a result of its widespread application in plastic industry. Soil contaminated with DEP requires the application of different chemical methods to attain its remediation. Among these methods, ozonation has proven to be effective against toxic soil pollutants. The presence of metal oxides in soil is a possible source of catalytic effect. In this study, it was analyzed the catalytic effect of goethite (α-FeOOH), hematite (α-Fe2O3), and gibbsite (γ-Al(OH)3) in combination with O3 to achieve DEP decomposition. The DEP elimination efficiency by ozonation on the sand increased according to the following order: without catalyst < γ-Al(OH)3 < α-Fe2O3 < α-FeOOH. Among these three oxides, goethite has the highest OH groups density. The reaction of OH groups and O3 favors the formation of oxidant species, such as O2•− and OH•. The effect of the moisture content, the catalyst concentration, and the type of soil (sand and calcined soil) were also studied. The latter had a significant influence on the total organic carbon (TOC) removal. The mineralization degree was 84% in the O3–soil system, while only 40% was obtained with O3–sand (α-FeOOH) in dry sand after 8 h of treatment. Calcined soil promoted the increase of TOC removal due to the presence of different metal oxides, which were active centers for O3 decomposition. The toxicity tests of the three reaction systems (O3–sand, O3–sand (α-FeOOH), and O3–soil) were evaluated on lettuce seed germination before and after DEP ozonation.
KW - Calcined soil
KW - Catalytic ozonation
KW - Diethyl phthalate
KW - Goethite
KW - Sand
UR - http://www.scopus.com/inward/record.url?scp=85089749070&partnerID=8YFLogxK
U2 - 10.1007/s11356-020-10522-8
DO - 10.1007/s11356-020-10522-8
M3 - Artículo
C2 - 32829431
AN - SCOPUS:85089749070
SN - 0944-1344
VL - 28
SP - 974
EP - 981
JO - Environmental Science and Pollution Research
JF - Environmental Science and Pollution Research
IS - 1
ER -