Calcium Chelation of Lignin from Pulping Spent Liquor for Water-Resistant Slow-Release Urea Fertilizer Systems

Tutkimustuotos: Lehtiartikkeli

Standard

Harvard

APA

Vancouver

Author

Bibtex - Lataa

@article{9362243ceb4f4275a9221932abaaa622,
title = "Calcium Chelation of Lignin from Pulping Spent Liquor for Water-Resistant Slow-Release Urea Fertilizer Systems",
abstract = "Slow-release fertilizers represent a possible large-scale application for plant polymers. Here we show a facile way to stabilize urea in fertilizer systems by lignin. Chelation of kraft black liquor with calcium acetate at pH 13 precipitated lignin as a calcium complex (Ca-lignin), which offered beneficial effects if compared to those from lignin obtained by precipitation at low pH (Acid-lignin). The reduced affinity of water to Ca-lignin was exploited in the formulation of slow release fertilizers comprising wheat straw sections impregnated with Ca-lignin in molten urea. Compared to the case of Acid-lignin, immersion in water was slowed down more extensively by Ca-lignin. After 24 h incubation at low moisture conditions, the highest proportion of urea retained in the Ca-lignin/straw fertilizer system was 58{\%}. The water resistance of Ca-lignin was explained by a lower aqueous solubility that differed from the typical pH-dependent solubility of Acid-lignin. Electron microscopy, infrared spectroscopy, and accessible surface areas suggested that Ca-lignin consisted of less densely packed molecules organized as calcium-chelated chains. Overall, the controlled water-solubility of lignin precipitated by metal cations is greatly beneficial in fertilizer systems and can open new opportunities in material development (permeable films and others).",
keywords = "Sulfate lignin, Cationic, Complex, Wheat straw, Impregnation, Dissolution, LIGNOBOOST PROCESS, COATED UREA, PRECIPITATION, SPECTROSCOPY, WASTE, SOILS",
author = "Sipponen, {Mika Henrikki} and Rojas, {Orlando J.} and Ville Pihlajaniemi and Kalle Lintinen and Monika {\"O}sterberg",
year = "2017",
month = "1",
doi = "10.1021/acssuschemeng.6b02348",
language = "English",
volume = "5",
pages = "1054--1061",
journal = "ACS Sustainable Chemistry and Engineering",
issn = "2168-0485",
publisher = "AMERICAN CHEMICAL SOCIETY",
number = "1",

}

RIS - Lataa

TY - JOUR

T1 - Calcium Chelation of Lignin from Pulping Spent Liquor for Water-Resistant Slow-Release Urea Fertilizer Systems

AU - Sipponen, Mika Henrikki

AU - Rojas, Orlando J.

AU - Pihlajaniemi, Ville

AU - Lintinen, Kalle

AU - Österberg, Monika

PY - 2017/1

Y1 - 2017/1

N2 - Slow-release fertilizers represent a possible large-scale application for plant polymers. Here we show a facile way to stabilize urea in fertilizer systems by lignin. Chelation of kraft black liquor with calcium acetate at pH 13 precipitated lignin as a calcium complex (Ca-lignin), which offered beneficial effects if compared to those from lignin obtained by precipitation at low pH (Acid-lignin). The reduced affinity of water to Ca-lignin was exploited in the formulation of slow release fertilizers comprising wheat straw sections impregnated with Ca-lignin in molten urea. Compared to the case of Acid-lignin, immersion in water was slowed down more extensively by Ca-lignin. After 24 h incubation at low moisture conditions, the highest proportion of urea retained in the Ca-lignin/straw fertilizer system was 58%. The water resistance of Ca-lignin was explained by a lower aqueous solubility that differed from the typical pH-dependent solubility of Acid-lignin. Electron microscopy, infrared spectroscopy, and accessible surface areas suggested that Ca-lignin consisted of less densely packed molecules organized as calcium-chelated chains. Overall, the controlled water-solubility of lignin precipitated by metal cations is greatly beneficial in fertilizer systems and can open new opportunities in material development (permeable films and others).

AB - Slow-release fertilizers represent a possible large-scale application for plant polymers. Here we show a facile way to stabilize urea in fertilizer systems by lignin. Chelation of kraft black liquor with calcium acetate at pH 13 precipitated lignin as a calcium complex (Ca-lignin), which offered beneficial effects if compared to those from lignin obtained by precipitation at low pH (Acid-lignin). The reduced affinity of water to Ca-lignin was exploited in the formulation of slow release fertilizers comprising wheat straw sections impregnated with Ca-lignin in molten urea. Compared to the case of Acid-lignin, immersion in water was slowed down more extensively by Ca-lignin. After 24 h incubation at low moisture conditions, the highest proportion of urea retained in the Ca-lignin/straw fertilizer system was 58%. The water resistance of Ca-lignin was explained by a lower aqueous solubility that differed from the typical pH-dependent solubility of Acid-lignin. Electron microscopy, infrared spectroscopy, and accessible surface areas suggested that Ca-lignin consisted of less densely packed molecules organized as calcium-chelated chains. Overall, the controlled water-solubility of lignin precipitated by metal cations is greatly beneficial in fertilizer systems and can open new opportunities in material development (permeable films and others).

KW - Sulfate lignin

KW - Cationic

KW - Complex

KW - Wheat straw

KW - Impregnation

KW - Dissolution

KW - LIGNOBOOST PROCESS

KW - COATED UREA

KW - PRECIPITATION

KW - SPECTROSCOPY

KW - WASTE

KW - SOILS

U2 - 10.1021/acssuschemeng.6b02348

DO - 10.1021/acssuschemeng.6b02348

M3 - Article

VL - 5

SP - 1054

EP - 1061

JO - ACS Sustainable Chemistry and Engineering

JF - ACS Sustainable Chemistry and Engineering

SN - 2168-0485

IS - 1

ER -

ID: 10728400