Continuous Fixed-Bed Column Study and Adsorption Modeling: Removal of Lead Ion from Aqueous Solution by Charcoal Originated from Chemical Carbonization of Rubber Wood Sawdust

Abstract

The efficiency of chemically carbonized rubber wood sawdust for the removal of lead ion from the aqueous stream was investigated by column process. Chemically carbonized rubber wood sawdust was prepared by treating the sawdust with H2SO4and HNO3. Maximum removal of lead ion in column process was found as 38.56 mg/g. The effects of operating parameters such as flow rate, bed depth, concentration, and pH were studied in column mode. Experimental data confirmed that the adsorption capacity increased with the increasing inlet concentration and bed depth and decreased with increasing flow rate. Thomas, Yoon-Nelson, and Adams-Bohart models were used to analyze the column experimental data and the relationship between operating parameters. Chemically carbonized rubber wood sawdust was characterized by using Fourier transform infrared spectroscopy. Scanning electron microscope was also utilized for morphological analysis of the adsorbent. Furthermore X-ray fluorescence spectrum analysis and energy dispersive X-ray spectroscopy were also used for the confirmation of lead adsorption process.

Efficient entrapping of toxic Pb(II) ions from aqueous system on a fixed-bed column of fungal biosorbent

“…Conversely, with an increase in bed depth, the residence time of Pb(II) solution inside the column was increased, allowing the Pb(II) ions to diffuse deeper into the fungal biomass (Babu et al, 2010). The related affinity was also reported in the literature (Biswas & Mishra, 2015). A plot of service time vs. bed depth, at a flow rate of 1 mL min −1 (Figure 4-60b) was linear.…”

Fixed-bed column adsorption study: a comprehensive review

“…Another simplified numerical model used to describe fixed-bed column adsorption data is the modified dose response model (MDRM). This model basically diminishes the error resulting from the use of the Thomas model, particularly at lower or higher time periods of the breakthrough curve (Lee et al 2015;Biswas and Mishra 2015).…”

Modeling of sorption and transport of cadmium, copper and chromium on an agricultural soil impacted by mining activities

“…Research has shown that increasing the concentration of elements leads to shorter breakthrough volume and exhaustion time because of a higher driving force of elements that can overcome the mass transfer resistance in the liquid phase. Moreover, saturation can be reached faster with high concentrations and leads to mobility of the elements in the soil which can end up in the groundwater . The particular concentrations were chosen since elements were found to be in high concentrations in the area under study .…”

“…Shows the end of simulation Exchange Defines the exchange composition or the cation exchange capacity Transport Specify parameters for the advectivedispersive-reaction transport Use Select aqueous solution that or reactants that are considered at a particular stage during the run Print Selected data blocks that will be printed on the output file because of a higher driving force of elements that can overcome the mass transfer resistance in the liquid phase. Moreover, saturation can be reached faster with high concentrations and leads to mobility of the elements in the soil which can end up in the groundwater [25,26]. The particular concentrations were chosen since elements were found to be in high concentrations in the area under study [14].…”