Selective capture of hexavalent chromium from an anion-exchange column of metal organic resin-alginic acid composite

Chemical Science
Sofia RaptiManolis J Manos

Abstract

We report an anion exchange composite material based on a protonated amine-functionalized metal-organic framework, denoted Metal Organic Resin-1 (MOR-1), and alginic acid (HA). MOR-1-HA material shows an exceptional capability to rapidly and selectively sorb Cr(vi) under a variety of conditions and in the presence of several competitive ions. The selectivity of MOR-1-HA for Cr(vi) is shown to be the result of strong O3CrVI···NH2 interactions. The composite sorbent can be successfully utilized in an ion-exchange column, in contrast to pristine MOR-1 which forms fine suspensions in water passing through the column. Remarkably, an ion exchange column with only 1% wt MOR-1-HA and 99% wt sand (an inert and inexpensive material) is capable of reducing moderate and trace Cr(vi) concentrations to well below the acceptable safety limits for water. The relatively low cost of MOR-1-HA/sand column and its high regeneration capability and reusability make it particularly attractive for application in the remediation of Cr(vi)-bearing industrial waste.

References

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Citations

Aug 4, 2018·Dalton Transactions : an International Journal of Inorganic Chemistry·Yan-Li GaiKe-Cai Xiong
Sep 27, 2018·Dalton Transactions : an International Journal of Inorganic Chemistry·Nasrin ShokouhfarAli Morsali
Aug 28, 2019·Environmental Science and Pollution Research International·Linfeng JinLiyuan Zhang
Nov 20, 2016·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Majid Riahi SamaniHamed Vafaei Molamahmood
Sep 26, 2020·Environmental Science and Pollution Research International·Lata RaniPooja Mahajan
Sep 1, 2017·ChemPlusChem·Anastasia D PournaraManolis J Manos
Oct 30, 2020·Dalton Transactions : an International Journal of Inorganic Chemistry·Stavros A DiamantisTheodore Lazarides
Nov 27, 2020·Dalton Transactions : an International Journal of Inorganic Chemistry·Soutick NandiShyam Biswas
Mar 12, 2021·ACS Applied Materials & Interfaces·Jilong LiMercouri G Kanatzidis
Jun 2, 2017·ACS Applied Materials & Interfaces·Imteaz AhmedSung Hwa Jhung
Oct 28, 2019·ACS Applied Materials & Interfaces·Cheng-Peng LiWuzong Zhou
Dec 29, 2018·ACS Applied Materials & Interfaces·Gabriel BrunetMuralee Murugesu
Nov 9, 2019·Langmuir : the ACS Journal of Surfaces and Colloids·Pengfei YangJinlou Gu
Dec 20, 2019·Journal of the American Chemical Society·Mengwei YuanMercouri G Kanatzidis
Nov 18, 2021·Dalton Transactions : an International Journal of Inorganic Chemistry·Soumya MukherjeeSujit K Ghosh

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Methods Mentioned

BETA
Scanning electron microscopy
X-ray
ion exchange studies
ion exchanger

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