Repositorio
Institucional

de la Luz Mora, Maria

Suazo-Hernandez, Jonathan

Klumpp, Erwin

Arancibia-Miranda, Nicolas

Jara, Alejandra

Poblete-Grant, Patricia

Sepulveda, Pamela

Bol, Roland

Combined Effect of Soil Particle Size Fractions and Engineered Nanoparticles on Phosphate Sorption Processes in Volcanic Soils Evaluated by Elovich and Langmuir-Freundlich Models

SPRINGER INT PUBL AG

JOURNAL OF SOIL SCIENCE AND PLANT NUTRITION

en

Engineered nanoparticles (ENPs) released into the environment can affect phosphate (Pi) availability in soils. In this study, we evaluated the effect of silver (Ag) or copper (Cu) ENPs (3 and 5%, w/w) on Pi sorption processes in soil particle size fractions. The 2000-32 mu m, 32-2 mu m, and < 2 mu m fractions were obtained from an agricultural volcanic soil by wet-sieving and sedimentation methods. The Elovich kinetic and Langmuir-Freundlich (L-F) isotherm models were used to describe the adsorption data obtained from batch experiments. The initial adsorption rate (alpha) was determined from the Elovich model to be 105% higher for the 2000-32 mu m fraction and 203% higher for the 32-2 mu m fraction than for the < 2 mu m fraction (671 mmol kg(-1) min(-1)). Meanwhile, with both doses of Cu ENPs, the alpha values are increased for the soil size fractions, resulting in the formation of adsorption sites for Pi. However, with Ag ENPs, the alpha values are both increased and decreased for the different soil fractions, therefore, they can block or generate adsorption sites. The maximum adsorption capacity (q(max)) was determined from the L-F model to be 17% higher for the 32-2 mu m fraction and 47% higher for the < 2 mu m fraction compared to that for the 2000-32 mu m fraction (180 mmol kg(-1)). With both ENPs, the q(max) values are found to be between 1.1 and 1.9 times higher with respect to the 2000-32 mu m fraction without ENPs. In the absence of ENPs, the highest Pi desorption was found in the 32-2 mu m fraction followed by 2000-32 mu m fraction, and finally < 2 mu m fraction. Moreover, the Pi desorption decreased for soil size fractions with increasing Ag or Cu ENPs content, which was found to be more pronounced in the 32-2 mu m fraction in the presence of Cu ENPs. The presence of Ag and Cu ENPs increases Pi retention in soil size fractions, which can decrease soil fertility. Thus, future studies are recommended to find out the critical amounts of ENPs, which may favor Pi retention without any negative effects on agricultural soils.

artículo original

This work was supported by FONDECYT Project N degrees 1181050, 1191018 and ANID Ph.D. scholarships N degrees 21171685.

Este trabajo contó con el apoyo del Proyecto FONDECYT N grados 1181050, 1191018 y el Ph.D. becas N grados 21171685.

10.1007/s42729-022-00919-4

PDF

Engineered nanoparticles

Phosphate

Soil particle size fractions

Adsorption

Volcanic soil

PHOSPHORUS ADSORPTION

SILVER NANOPARTICLES

ORGANIC-MATTER

RELEASE

CHARGE

PH

DESORPTION

TRANSPORT

NITRATE

OXIDES

Ciencias Vegetales

Ciencias Ambientales

Ciencia del suelo

Nanopartículas diseñadas

Fosfato

Fracciones del tamaño de partículas del suelo

Adsorción

Suelo volcánico

ADSORCIÓN DE FÓSFORO

NANOPARTÍCULAS DE PLATA

MATERÍA ORGÁNICA

LIBERACIÓN

CARGA

PH

DESORPCIÓN

TRANSPORTE

NITRATO

ÓXIDOS

Ciencias del suelo

Agricultura

Nanomateriales (Producción y Propiedades)

Combined Effect of Soil Particle Size Fractions and Engineered Nanoparticles on Phosphate Sorption Processes in Volcanic Soils Evaluated by Elovich and Langmuir-Freundlich Models

3685

3696

artículo original

version publicada

0

restringido

restringido

ANID-FONDECYT 1181050

ANID-FONDECYT 1191018

ANID 21171685

ANID FONDECYT 1181050

ANID FONDECYT 1191018

WOS:000835156800003