Adsorption of lead(II) ion from aqueous solution using rice hull ash

作者：Wang Li Hua; Lin Chun I^*

来源：Industrial & Engineering Chemistry Research, 2008, 47(14): 4891-4897.

DOI：10.1021/ie071521z

Adsorption of lead(II) ion from aqueous solution using rice hull ash (RHA) was explored in this work. The RHA prepared was found to be an efficient adsorbent. Experimental results indicated the rate of removal and the removal at equilibrium could be increased by increasing the initial lead concentration, pH, stroke speed, or adsorption temperature. They were also found to be increased by decreasing RHA dosage. The effects of RHA dosage and initial lead concentration were found to be pronounced, while those of pH, stroke speed, and adsorption temperature were less significant. The data of adsorption kinetics indicated the process was physisorption controlled and the pseudo-second-order rate equation suitably interpreted the overall process. An empirical relationship between lead adsorption and time,was also determined.

• 出版日期2008-7-16