Adsorption study of lead(II) onto xanthated date palm trunk: kinetics, isotherm and mechanism

作者：Yadav Sunil Kumar; Singh Dhruv Kumar^*; Sinha Shishir

来源：Desalination and Water Treatment, 2013, 51(34-36): 6798-6807.

DOI：10.1080/19443994.2013.792142

• Adsorption
• Lead(II)
• Xanthated date palm trunk
• Batch studies
• Adsorption isotherm

The adsorption of lead(II) onto xanthated date palm trunk (XDPT) from aqueous solutions was studied in a batch adsorption system. Factors influencing lead(II) adsorption such as initial Pb(II) concentration (25.8-207.0mg/l), pH (1-6), contact time (5-240min), and adsorbent dosage (0.625-6.0g/l) were investigated. The adsorption process was relatively fast and equilibrium was established within 120min. Maximum adsorption of Pb(II) occurred at pH approximate to 5. A comparison of the kinetic models on the overall adsorption rate showed that the adsorption system can be best described by the pseudo-second-order kinetics. The adsorption equilibrium data obeyed Langmuir isotherm and the monolayer adsorption capacity of Pb(II) was found to be 53.48mg/g. The adsorption mechanism has been suggested to be due to the complexation of lead(II) ions with sulfur donors present in XDPT.

• 出版日期2013-10-1