Adsorption and determination of Lead in water and human urine samples based on Zn2(BDC)2(DABCO) MOF as polycaprolactone nanocomposite by suspension micro solid phase extraction coupled to UV–VIS spectroscopy

Masomeh Odar Odar,Negar Motakef Kazemi

doi:10.24200/amecj.v4.i03.145

Abstract

Today, the safety of water resource is the most important challenges which was reported by health and environment organizations. Water pollution can be created by hazardous contaminants of environmental pollutions. Lead as a heavy metal has carcinogenic effects in humans. Metal organic framework (MOF) is a highly porous material with different application. The Zn2(BDC)2(DABCO) is a good candidate of MOF based on zinc metal (Zn-MOF) with potential adsorption/extraction. In this work, Zn2(BDC)2(DABCO) MOF as polycaprolactone (PCL) nanocomposite were applied for lead adsorption/extraction from 50 mL of aqueous solution by ultra-assisted dispersive suspension-micro-solid phase extraction procedure (USA-S- µ-SPE) at pH=8. The samples were characterized by the FTIR, the XRD analysis, the FE-SEM and the BET surface area. The effect of parameters was investigated on lead absorption before determined by UV–VIS spectroscopy. The linear range, the detection limit (LOD) and enrichment factor of adsorbent were obtained 0.05-1 mg L-1, 0.25 μg L-1 and 48.7, respectively (r = 0.9992, RSD%=3.65). The absorption capacity of Zn2(BDC)2(DABCO) MOF for 50 mg L-1 of standard lead solution were obtained 133.8 mg g-1 for 0.25 g of adsorbent. The results indicate that this nanocomposite can have a good potential to develop different adsorbents.

Highlights

Heavy metals are considered one of the major pollutants with harmful effects on the environment and living organisms [1]
Zn2(BDC)2(DABCO) Metal organic framework (MOF)/PCL nanocomposites were prepared by a simple method and lead absorption was investigated by MOF and its nanocomposites from aqueous solution at optimized pH
Extraction/Adsorption Procedure By the USA-S- μ-SPE method, 50 mL of urine and water samples were used for extraction and determination lead ions by Zn2(BDC)2(DABCO) MOF adsorbent. 0.25 g of Zn2(BDC)2(DABCO) MOF added to urine/water or standard solution (0.05-1 mg L-1) at pH=8

Summary

Introduction

Heavy metals are considered one of the major pollutants with harmful effects on the environment and living organisms [1]. Zn2(BDC)2(DABCO) MOF/PCL nanocomposites were prepared by a simple method and lead absorption was investigated by MOF and its nanocomposites from aqueous solution at optimized pH. Polycaprolactone nanocomposites cannot be prepared by solution casting method.

Results

Conclusion