دانلود رایگان مقاله جذب سریع در سلولز اصلاح شده آماده حاوی بخش مس (II)

Abstract

Arsenic is one of the major pollutants and a worldwide concern because of its toxicity and chronic effects on human health. The synthesis of copper containing modified cellulose (Cell-N-Cu) adsorbent was achieved. The adsorbent was used to purify different waters from As(V) at different experimental conditions using batch method. Kinetic and thermodynamic properties as well as the mechanism of interaction between As(V) and adsorbent active sites were discussed. The adsorption behavior of the obtained samples showed high adsorption capacity as well as fast kinetics towards As(V) in their solutions. The maximum adsorption capacities of As(V) on Cell-N-Cu adsorbent were found to be 1.32 mmol/g. Regeneration and durability of the loaded adsorbent towards the successive reuse were also investigated. Fast and selective separation of As(V) from a real wastewater sample indicated that the investigated resin is potentially attractive for arsenic removal from different waste streams.

4. Conclusion

Copper loaded (Cell-N-Cu) adsorbent was prepared and investigated. The adsorbent obtained is characterized by a fast and high adsorption capacities towards As(V) from aqueous media at natural pH (8.4). The equilibrium adsorption was reached within 5 min and reached 1.32 mmol/g. The adsorption process was found to follow pseudo-second order kinetics. The regeneration efficiency of the loaded adsorbent was found to be 98% ± 1% for As(V) using ammonium hydroxide. High 0.0029 0.0031 0.0033 0.0035 1/T (K-1 ) 0.0 0.2 0.4 0.6 0.8 lnKL Figure 9 Van’t Hoff plots for the adsorption of As(V) by CellN-Cu adsorbent. Table 5 ICP results of wastewater real sample before and after treatment with the investigated adsorbent. Ion Ci (mg/L) Cf (mg/L) Removal ratio (%) SO4 2 110.6 90.6 18.08 CO3 2 100.2 86.3 13.87 PO4 3 3.00 2.10 30.0 NO3 1.26 1.18 6.35 Cl 90.4 80.2 11.28 As(V) 102.2 28.4 72.21 Table 4 Thermodynamic parameters for adsorption of As(V) on Cell-N-Cu adsorbent. Temp.(K) DH (kJ/mol) DS (kJ/mol K) DG (kJ/mol) TDS (kJ/mol) 298 14.8 0.045 1.5 13.28 308 1.1 13.73 318 0.7 14.17 328 0.2 14.62 Fast and selective adsorption of As(V) 613 arsenic uptake capability obtained from real sample results and cost-effectiveness of modified cellulose sorbent made it potentially attractive for arsenic removal from different waste streams.