文章基本信息

标题：Lead Adsorption onto Various Solid Surfaces
本地全文：下载
作者：Handojo Djati Utomo
期刊名称：Natural Resources
印刷版ISSN：2158-706X
电子版ISSN：2158-7086
出版年度：2015
卷号：06
期号：03
页码：152-158
DOI：10.4236/nr.2015.63014
语种：English
出版社：Scientific Research Publishing
摘要：Adsorption is becoming an important method in water and wastewater treatment technology at low concentrations. Pb2+ adsorption at low concentration onto various solid surfaces using either nano metal oxide of MnO2, or granulated activated carbon (GAC) or agricultural by-products such as tea leaves and coffee residue are considered promising. In this adsorption study the measurements were conducted by equilibrating Lead solutions at different concentrations range 19 - 291 μmol·L-1 with various adsorbent suspensions in the concentration range 0.388 - 8.738 g·L-1. Comparing all the adsorption capacities calculated using Langmuir equation Pb2+ adsorption by MnO2 shows the highest adsorption capacity with the estimated Γm = 528.0 μmol·g–1 at a fixed equilibrium constant K = 0.0119 L·μmoL-1. In addition, the Pb2+ adsorption by coffee residue is subject to a particle concentration effect in which the adsorption density decreases as the concentration of solid adsorbent Cs is increased. The Pb2+ adsorption by tea leaves, MnO2 and GAC shows less dependency to the concentration of solid adsorbent Cs, especially at lower metal ion concentrations. In the particular case of Pb2+ adsorption on MnO2 there appears to be no dependence on Cs.
关键词：Adsorption; Coffee Residue; GAC; Pb²⁺; Particle Concentration Effect; Tea Leaves; Nano Metal Oxide of MnO₂