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<p>In this study, we successfully prepared carbonized/dextrinated-starch (CDS) modified with biological modifiers and investigated its adsorption properties. The morphological features of different modified starch (S) and CDS were characterized using multiple analytical techniques. Adsorption behaviors of CTC and Pb(II) were evaluated via batch experiments, and the effects of pH, temperature, and ionic strength on adsorption were compared. Morphological analyses confirmed successful surface modification by biological modifier, which altered the physicochemical properties of S and CDS. Both the Langmuir and Freundlich models were suitable for describing the adsorption process of CTC and Pb(II). The maximum adsorption capacities of CTC and Pb(II) on different modified materials were 14.06–25.82 mmol/kg and 388.70–807.52 mmol/kg, respectively, following the trends: SA-modified &gt; AE-modified &gt; unmodified material and modified CDS &gt; modified S. Higher temperature and pH promoted the adsorption of CTC and Pb(II), and the process was an endothermic, spontaneous, and entropy- increasing reaction. The adsorption capacity for both CTC and Pb(II) initially increased and then decreased as the ionic strength increased. Moreover, the modified CDSs were practical and environmentally friendly for the treatment of CTC and Pb(II).</p>

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Chlortetracycline and Pb(II) adsorption on biologically modified carbonized/dextrinated-starch

  • 期刊论文

  • 发表日期：

    2026年1月5日

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  • Ting Wang,
  • Hongyan Deng,
  • Abbas Touqeer,
  • Wenbin Li,
  • Mah Noor Fatima,
  • Yuting Song

摘要

In this study, we successfully prepared carbonized/dextrinated-starch (CDS) modified with biological modifiers and investigated its adsorption properties. The morphological features of different modified starch (S) and CDS were characterized using multiple analytical techniques. Adsorption behaviors of CTC and Pb(II) were evaluated via batch experiments, and the effects of pH, temperature, and ionic strength on adsorption were compared. Morphological analyses confirmed successful surface modification by biological modifier, which altered the physicochemical properties of S and CDS. Both the Langmuir and Freundlich models were suitable for describing the adsorption process of CTC and Pb(II). The maximum adsorption capacities of CTC and Pb(II) on different modified materials were 14.06–25.82 mmol/kg and 388.70–807.52 mmol/kg, respectively, following the trends: SA-modified > AE-modified > unmodified material and modified CDS > modified S. Higher temperature and pH promoted the adsorption of CTC and Pb(II), and the process was an endothermic, spontaneous, and entropy- increasing reaction. The adsorption capacity for both CTC and Pb(II) initially increased and then decreased as the ionic strength increased. Moreover, the modified CDSs were practical and environmentally friendly for the treatment of CTC and Pb(II).