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HomeAdvances in Science and TechnologyAdvances in Science and Technology Vol. 115Synthesis of Carboxymethyl...

Synthesis of Carboxymethyl Cellulose/Bentonite/N-P-K Composite as Slow-Release Fertilizer Model Using Twin-Screw Extruder

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Abstract:

CMC/Bentonite/N-P-K composites have been prepared as the macronutrient slow-release fertilizer. The composites were made by mixing natural bentonite, carboxymethyl cellulose (CMC), and N-P-K using a twin-screw extruder at 100 °C and screw rate of 600 rpm. The weight ratio of CMC to N-P-K was set at 1:0.5. The mass of bentonite was varied at 0.1; 0.5; and 1 (wt.%). The composites were characterized using infrared (IR) spectroscopy and X-ray diffraction (XRD). Mechanical properties of the composites were evaluated through tensile and compressive strength, water absorption capacity and stability test in water. It is found that increasing the natural bentonite ratio in the composite decreased the tensile and compressive strength but increased water absorption capacity and stability. The release of N-P-K from CMC/Bentonite/N-P-K followed the kinetic release model of pseudo-second-order.

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Periodical:

Advances in Science and Technology (Volume 115)

Pages:

53-60

DOI:

https://doi.org/10.4028/p-qxgbxq

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Online since:

August 2022

Authors:

Wini Nafisyah, Sutarno Sutarno, Bakti Berlyanto Sedayu, Silvia Wahyuni, Indriana Kartini*

Keywords:

Carboxymethyl Cellulose (CMC), NPK, Slow-Release Fertilizer, Twin-Screw Extruder

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© 2022 Trans Tech Publications Ltd. All Rights Reserved

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