4.3 Article

Accelerating Dechlorination Using Calcium Oxide with the Assistance of Metallic Aluminum in Mechanochemical Reaction

Journal

CHEMISTRY LETTERS
Volume 47, Issue 1, Pages 40-43

Publisher

CHEMICAL SOC JAPAN
DOI: 10.1246/cl.170859

Keywords

Cl-POPs; MCD; CaO-Al additives

Funding

  1. National Natural Science Foundation of China [51621005, 51676172, 51706201]
  2. national key research and development program of China [2017YFC0703100]

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An innovative additive, CaO-Al is utilized for the mechanochemical degradation (MCD) of chlorinated persistent organic pollutants (Cl-POPs). The introduction of Al into CaO significantly accelerates the reaction by promoting the release of electrons. The degradation efficiency of hexachlorobenzene (HCBz), 2,2-bis(4-chlorophenyl)-1,1-dichloroethane (P.P'-DDD), and gamma-hexachlorocyclohexane (gamma-HCH) reaches 99.70, 97.75, and 99.71%, respectively, after 3, 1.5, and 8 h of milling. The stability of these organics in MCD follows the sequence of gamma-HCH > HCBz > P.P'-DDD, which is consistent with their degree of unsaturation.

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