Open AccessLanthanum based metal organic frameworks as a new binding agent material for diffusive gradient in thin film (DGT) technique in bioavailability of phosphate removal
Author(s) -
C. Santikasari,
Asep Saefumillah,
Agustino Zulys
Publication year - 2020
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/902/1/012043
Subject(s) - diffusive gradients in thin films , bioavailability , phosphate , adsorption , phosphorus , chemistry , sorption , diffusion , environmental chemistry , chemical engineering , materials science , metal , chromatography , organic chemistry , bioinformatics , physics , biology , engineering , thermodynamics
High concentration of bioavailable phosphorus in aquatic system has been resulting in the eutrophication phenomenon that can trigger algae bloom. The measurement of bioavailable phosphorus in water body is needed. The diffusive gradient in thin film (DGT) is a well-developed in-situ analytical tool for separation and determination if bioavailable phosphorus or dissolver reactive phosphate (DRP). Using lanthanum based metal organic frameworks (La-MOF) with high surface area and tuneable pore might attribute the capacity of DRP adsorption in binding film. The surface area analysis of La-MOF powder was 84.957 m 2 g −1 . La-MOF then dispersed in gel solution to perform a binding film La-MOF then used in DGT tool for DRP uptake. The swelling activity of diffusive film was 2.24 and 1.93 for binding film La-MOF. The elution efficiency of DRP from binding film La-MOF was 95 % using HNO 3 0.05 mol.L −1 as an eluent. The diffusion coefficient of DRP from La-MOF DGT was 2.216 × 10 −6 cm 2 .s −1 . Optimum DRP uptake capacity was up to 37.83 μg P with optimum time of deployment of 24 h. This research shows that the DRP uptake on DGT La-MOF was depended on the time deployment and DRP solution concentration.