Adsorption of Co(II) from aqueous solutions by water treatment residuals
Jian Jiao1, Jinbo Zhao1, Yuansheng Pei1
1The Key Laboratory of Water and Sediment Sciences, Ministry of Education, School of Environment, Beijing Normal University, Beijing 100875, China.
Abstract:
A study on the removal of Co(II) from aqueous solutions by water treatment residuals (WTR) was conducted in batch conditions. The sorption process of Co(II) followed pseudosecond-order kinetics, with 30hr required to reach equilibrium. Using the Langmuir adsorption isotherm model, a relatively high maximum sorption capacity of 17.31mg/g Co(II) was determined. The adsorption of Co(II) was dependent on pH values and was affected by the ionic strength. Results show that Co(II) adsorption was a spontaneous endothermic process and was favorable at high temperature. Most of the adsorbed Co(II) stayed on the WTR permanently, whereas only small amounts of adsorbed Co(II) were desorbed. The shifting of peaks in FT-IR spectra indicated that Co(II) interacted with the WTR surface through strong covalent bond formation with Fe(Al)-O functional groups. It was concluded that WTR can be a suitable material from which to develop an efficient adsorbent for the removal of Co(II) from wastewater.
More Related Videos
08:00Author Spotlight: Standardizing the Development of Amine-Based Silica Composites as CO2 Adsorbents for Direct Air Capture
Published on: September 29, 2023
11:19Measuring Carbon-based Contaminant Mineralization Using Combined CO2 Flux and Radiocarbon Analyses
Published on: October 21, 2016
Related Concept Videos
Factors Affecting Solubility
Coagulation
Precipitation and Co-precipitation
Carbon Dioxide Transport in the Blood
Forms of CO2 Transport
1. Dissolved in plasma: A small percentage (7-10%) of CO2 is transported and dissolved directly in the plasma.
2. Carbaminohemoglobin: Just over 20% of CO2 is chemically bound to...
Bioremediation
The Carbon Cycle
