Hybrid inorganic/organic adsorbents based on alumina and 4-aminoantipyrene were synthesized, characterized
and potentially applied to remove and preconcentrate Pb(II), Cu(II) and Cr(III) from industrial wastewater
and drinking tap water via static and dynamic solid phase techniques. Hybrid inorganic/organic adsorbents
were identified as strongly resistive to acid leaching in pH 1–7 and thermally stable up to 350 °C. Heavy metal
binding performance was evaluated and found to exhibit strong capability and selectivity for removal of heavy
metal ions such as Pb(II), Cu(II) and Cr(III) under optimized pH and contact time. The contribution of inorganic
portion of the hybrid was strongly observed when low concentration levels (μg ml−1 and ng ml−1) of metal
ions were used, while the contribution of the organic counterpart was detected for high concentration levels of
metal ions. The hybrid adsorbents were successfully applied for selective removal of Pb(II), Cu(II) and Cr(III)
from industrial wastewater samples with recovery values (92–98±2–4%) as well as solid phase
preconcentration of the spiked concentration (4.700–4.860 ng ml−1) of Pb(II), Cu(II) and Cr(III) from
drinking tap water samples with percentage values (93–97±2–4%).
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