| Abstrak/Abstract |
This research aims to determine the concentration of multi-nutrients and
heavy metals and investigate the correlation among them in the seven inorganic fertilizers
in Indonesia. Sample analysis was carried out using the NAA method. The highest
concentrations of macro-nutrients were K (36.54 %) and Cl (18.09%) found in the KCl
sample, while Ca (23.01%) was observed in the TSP sample. In the case of micro-nutrients,
the highest concentrations of Se (0.36 mg/kg), Ti (597 mg/kg), Br (1.84%), and Ni
(2.46 mg/kg) detected in the NPK sample. Meanwhile, the highest concentrations of Co
(19.57 mg/kg) and Na (1.40%) were measured in the ZA sample, while Mg, with the
highest concentration of 1.78%, was found in the KMgS sample. The micro-nutrients with
the highest concentration detected in the TSP sample were Cr (45.96 mg/kg), Zn
(342.6 mg/kg), and Mn (1331 mg/kg). Non-essential elements such as U, V, La, Sb, Sm,
Th, Hf, Sr, Cs, Tb, Sc, Rb, Ta, and Eu were also detected in the fertilizer samples with the
highest concentrations in the TSP sample. Statistical tests of multi-nutrient and heavy
metals concentrations indicated that multi-nutrient and heavy metals in fertilizers are
complex. |
