Efficient Removal of Nitrate in Neutral Solution Using Zero-Valent Al Activated by Soaking.

ABSTRACT: Nitrate is a contaminant widely found in surface water, and a high concentration of nitrate can pose a serious threat to human health. Zero-valent iron is widely used to reduce nitrate in aqueous solution, but an acidic condition is required. Zero-valent aluminum has a much lower redox potential (E₀(Al³⁺/Al⁰) = -1.662 V) than zero-valent iron (E₀(Fe²⁺/Fe⁰) = -0.44 V), making it a better choice for reduction of nitrate. However, a passive oxide film covering on Al surfaces inhibits its electron transfer. In this work, metal Al powder was activated by a soaking procedure in deionized water. It was found that nitrate in neutral solution can be efficiently and completely reduced by soaked Al, even if the concentrat

SUBMITTER: Dai YG 

PROVIDER: S-EPMC10357571 | biostudies-literature | 2023 Jul

REPOSITORIES: biostudies-literature