Mistletoe leaves as a biosorbent for removal of Pb(II) and Cd(II) from aqueous solution

被引:6
|
作者
Nguyen Van Suc [1 ]
Luong Ngoc Son [1 ]
机构
[1] Ho Chi Minh City Univ Tech Educ, Dept Environm Technol, 01 Vo Van Ngan, Ho Chi Minh City, Vietnam
关键词
Lead; Cadmium; Mistletoe leaves; Biosorbent; Adsorption isotherms; Adsorption kinetics; GRANULAR ACTIVATED CARBON; HEAVY-METALS; LEAF POWDER; ADSORPTION; ISOTHERM; SORPTION; CADMIUM; TREE; EQUILIBRIUM; BIOSORPTION;
D O I
10.1080/19443994.2014.986532
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
The adsorption of Pb(II) and Cd(II) ions onto the biosorbent from leaves of Ramus Loranthi, Scurrula Parasitica L., family Loranthaceae, commonly known as mistletoe or Tam gui in Vietnam, (henceforth to be referred as mistletoe leaves) was studied. The results showed that adsorption equilibrium was established in 150min of contact time. The maximum adsorption for both metals obtained was at pH 5.5. The time-dependent experimental data of Pb(II) and Cd(II) adsorption process well fitted the pseudo-second-order model. The Redlich-Peterson, Toth, and Langmuir models were appropriate to describe the adsorption process, indicating the chemisorption process onto mistletoe leaves. The maximum adsorbent capacity was increased with an increase in temperature. It was found to be 44.8, 47.85, 49.1, and 50.07mg/g for Cd(II) and 59.76, 63.25, 66.3, and 68.53mg/g for Pb(II) at 303, 308, 313, and 318K, respectively. The positive value of H indicated the endothermic adsorption process. The high adsorption capacity for Pb(II) and Cd(II) obtained in this study shown that mistletoe leaves are a potential biosorbent for removal of these metals from wastewater and contaminated water.
引用
收藏
页码:3606 / 3618
页数:13
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