Synthesis and characterization of pineapple leaf modified with diethylenetriamine solution

Abstract

Pineapple is the third most consumed fruit in the world with an annual production of about 25 million tons. Usually, pineapple leaf (PL) becomes the waste after harvesting and most of the PL was burned to eliminate fungi, composted or just piled to rot. The aim of this study is to synthesize PL modified with diethylenetriamine (DETA) that contain amino groups (NH2) which enhance the adsorption capacity via the impregnated method. In order to prove the presence of NH2 groups on the surface of adsorbent after modification, the characterization analysis has been done. After the modification of PL with DETA (DETA-PL), the FTIR analysis shows the 2 peaks that attributed to the amino group. There also increased surface area, pore volume, pore size and the amount of N of DETA-PL as evidence of BET analysis and elemental analysis. The amount of N also increased after modification. The morphology of DETA-PL was smooth and crinkle after modification with DETA. The point of zero charges of DETA-PL was increased after the modification of PL. The finding obtained from all of the characterization analyses showed that there are presences of the amino group on the surface of DETA-PL adsorbent after modification. This suggested that DETA-PL is a promising adsorbent for an adsorption method of wastewater treatment.