Plaster of Paris containing zero valent iron particles: Designing a permeable reactive barrier, used for remediation of 4-nitroaniline pollution

Permeable reactive barrier (PRB) containing zero valent iron (ZVI), plaster and additives to make a porous composite structure, was tested remove an organic nitro compound as model pollutant. An aqueous solution of 4-nitroaniline (PNA) passed through column chemical degradation quantified by UV-Vis spectroscopy. PNA reduced p-phenylenediamine the rate reduction strongly related ZVI amount, pollutant volume, contact with metal particles. The PBR could be controlled design operation. Test columns were made evaluate materials for making precast blocks ZVI. results showed that such efficient retaining funneling walls environmental applications. Thus economical Calcium sulphate solids can used remediation depolution products capacity treating unwanted toxic nitrates, or chlorinatedsolvents present in waterways. A permeable will last long some particles remain react.