Open AccessSlow Release Fertilizer from Treated Rice Straw/Urea Beads Coated With Natural Rubber: FTIR and UV-Vis Analysis
Author(s) -
A. K. Aini,
R. Hamzah,
N. Z. Noriman,
Awad A. Alrashdi,
Izwan Johari,
Z. M. Razlan,
A. B. Shahriman,
I. Zunaidi,
Wan Khairunizam
Publication year - 2019
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/557/1/012068
Subject(s) - urea , coated urea , fourier transform infrared spectroscopy , sodium hydroxide , fertilizer , natural rubber , salt (chemistry) , chemistry , straw , nuclear chemistry , chemical engineering , inorganic chemistry , biochemistry , organic chemistry , engineering
Slow release fertilizer (SRF) that consist of rice straw (RS) and urea coated with natural rubber (NR) and salt abbreviated as RS/Urea beads coated with NR/salt composites were prepared. RS was sieved in two different sizes which were 500 μm and 1 mm. Both of the RS sizes were treated with sodium hydroxide to expand the fibre capacity in order to store more urea. The RS/urea beads were then coated with NR/salt composite. Two concentrations of the salts prepared which were 5 % and 10 % towards the weight of the NR while 0 % salt act as a control. The role of salt is to introduce pore to the NR which allow urea to pass through its coating when soaked in the water. All SRF samples were analysed using FTIR and UV-Vis technique.