الفهرس 
INTRODUCTIONOnly 14 pages are availabe for public view
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Abstract
The current work describes the synthesis of modified nanocomposites based on activated serpentinite with iron nanoparticles, Nickel nanoparticles, and copper nanoparticles through co-precipitation technique. characterization of the raw, activated, and synthesized serpentinite nanocomposites sorbents were carried out using the FT-IR, TEM, XRD, BET and EDX-SEM techniques which confirmed the successful preparation of the nanocomposites. The metal sorption behaviour of different sorbents for extraction and removal of pollutants, crystal violet dye, methylene blue dye and chromium hexavalent. That were accomplished by the batch technique.
Part 1: chromium hexavalent CrVI
• Generally, the synthesized sorbents are characterized to have the highest metal capacity values for chromium hexavalent compared to RS and AcS sorbents.
• Almost all are characterized to exhibit their highest sorption capacity for CrVI at pH 2.0, The best contact time for all hydrogel sorbents is 120 min.,
• 10-12gm of the studied sorbents is the effective sorbent dose for removal of CrVI ions.
Part 2: Crystal violet and Methylene blue
• Generally, the synthesized sorbents are characterized to have the highest metal capacity values for MB and CrVio. compared to RS and AcS sorbents.
• the highest sorption capacity for MB and CrVio. at pH 10.0, `
• The best contact time for all sorbents is 20 min.,
• 5.0 gm of the studied sorbents is the effective sorbent dose for removal of MB and CrVio ions.
The adsorption process of studied metal ions by all studied sorbents are found to exhibit pseudo second order kinetics and best fitted to Langmuir adsorption isotherm.