Adsorption of bentazone and imazapyc from water by using functionalized silica: Experimental and computational analysis

被引：12

作者：

Spaltro, Agustin ^{[1
,4
]}

Simonetti, Sandra ^{[2
,3
,4
]}

Laurella, Sergio ^{[1
,5
]}

Ruiz, Danila ^{[1
,4
]}

Diaz Company, Andres ^{[2
,5
]}

Juan, Alfredo ^{[2
,4
]}

Allegretti, Patricia ^{[1
]}

机构：

[1] UNLP, Fac Ciencias Exactas, CEDECOR Ctr Estudio Compuestos Organ, Calle 115 & 47, RA-1900 La Plata, Buenos Aires, Argentina

[2] UNS, CONICET, Dept Fis, Inst Fis Sur IFISUR, Av LN Alem 1253,B8000CPB, Bahia Blanca, Buenos Aires, Argentina

[3] UTN, 11 Abril 461,B8000LMI, Bahia Blanca, Buenos Aires, Argentina

[4] Consejo Nacl Invest Cient & Tecn, CONICET, Buenos Aires, DF, Argentina

[5] Comis Invest Cient Prov Buenos Aires, CIC BA, Buenos Aires, DF, Argentina

来源：

JOURNAL OF CONTAMINANT HYDROLOGY | 2019年 / 227卷

关键词：

Adsorption; Functionalized silica; Bentazone; Imazapyc; Computational analysis; MESOPOROUS SILICA; GROUND-WATER; SURFACE; IMIDAZOLINONE; CATALYST; LIQUID; AREA;

D O I：

10.1016/j.jconhyd.2019.103542

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

In this study, silica and functionalized silica materials (3-aminopropyl and 3-mercapto derivatives) were successfully used for the removal of the pesticides bentazone and imazapyc from aqueous solutions. Adsorbent materials were characterized by BET isotherms and FT-IR spectroscopy (confirming the functionalization), and their equilibrium adsorption capacity was evaluated at different ionic strengths. It is observed that the maximum adsorption capacities decrease in the order 3-aminopropyl-derivative > silica > 3-mercaptopropyl derivative. An increase in ionic strength produces an enhancement in the removal of pesticides. All isotherms are lb -type and follow the Langmuir model, suggesting a monolayer physical adsorption process.

引用

页数：9

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