Chemical activation of vermiculite to produce highly efficient material for Pb2+ and Cd2+ removal
Source abstract
Abstract
Abstract In this study vermiculite from Egypt was chemically activated by leaching with 0.5 M HCl solution or by treatment with 30% H 2 O 2 solution. SEM and X-ray results showed that leaching of vermiculite with HCl solution results in partial transformation of its ordered layer structure into delaminated structure while its treatment with H 2 O 2 solution results in high separation and fragmentation of the layers with no structure change. The expansibility factor, k was measured on the base of the changes in the internal layer space of raw and activated vermiculite and it was found to be 2.5 and 14.83 for samples activated by HCl and H 2 O 2 , respectively. As indicated from DSC tests, the chemically activated vermiculite treated with Cd 2 + or Pb 2 + ions showed higher thermal stability than that of raw vermiculite treated with the same ions. The removal efficiency of peroxide activated vermiculite was higher than that of the acid activated vermiculite for both cadmium and lead ions.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Clay minerals and soil interactions · Chemical Synthesis and Characterization · Radioactive element chemistry and processing
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (48)
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