Reactive membranes for groundwater remediation of chlorinated aliphatic hydrocarbons: competitive dechlorination and cost aspects.

ABSTRACT: A nanocomposite membrane incorporating reactive Pd-Fe nanoparticles (NPs) was developed to remediate chlorinated aliphatic hydrocarbons (CAHs) from groundwater. Other than recapturing the produced Feⁿ⁺ for in-situ regeneration, the functionalized polyanions prevented NPs agglomeration and resulting in a spherical Fe⁰ core (55 nm, O/Fe = 0.05) and an oxidized shell (4 nm, O/Fe = 1.38). The reactive membranes degraded 92% of target CAHs with a residence time of 1.7 seconds. After long-term treatment and regeneration, reusability was confirmed through recovered reactivity, recurrence of Fe⁰ in X-ray photoelectron spectroscopy, and >96% remaining of Fe and Pd. The total cost (adjusted present value for 20 years) was estimated to be 13.9% lower than the granular

SUBMITTER: Wan H 

PROVIDER: S-EPMC10830166 | biostudies-literature | 2023 Sep

REPOSITORIES: biostudies-literature