Unmodified Rice Straw for The Lead Removal Approach from Synthetic Lead Solution

Abstract

Lead, is the most common toxic metal that causing damage to the environment and human health due to its accumulation and persistence in the environment. The possibility of using biosorption unmodified rice straw (RS) was studied to eliminate lead ions from synthetic industrial wastewater. The impact of the initial concentration for lead (5-200 mg/l) and the contact time (10-120 min) were studied at 25°C and pH 5 of stirring solutions. Different analytical techniques such as Scanning Electron Microscope (SEM), Energy dispersive X-ray (EDX), and Fourier-transform infrared spectroscopy (FTIR) were used to figure out the change of rice straw adsorption capacity Moreover, The kinetic models pseudo-first and secondorder and both of Freundlich and Langmuir isotherm models have been tested. The results obtained show a significant removal of the lead content by approximately 94 % using unmodified rice straw (RS). Adsorption data was fitted with Freundlich isotherm model and pseudo-second order kinetics for unmodified rice straw

Adsorptive removal of Pb(II) ions from aqueous solution by activated carbon prepared from cabbage waste

“…The adsorption of Pb(II) on rice straw was found to follow pseudo second-order kinetics with a rate constant value of 0.72 g/(mg•min) for 50 mg/L initial concentration. The maximum adsorption capacity was 2.11 mg/g (Saad et al, 2020).…”

Effect of the adsorbent dose and initial contaminant concentration on the removal of Pb(II) in a solution using Opuntia ficus Indica shell

“…In the treatment of water contaminated with Pb (II), different residues of agricultural origin have been used as bio-adsorbents, among them: cocoa (Obike et al, 2018), rice (Saad, Amer, Tayeb, Nady, & Mohamed, 2020), lentils (Basu, Guha, & Ray, 2019), peas (ul Haq et al, 2017), plantain (Ibisi & Asoluka, 2018), dates seeds (Mahdi, Yu, & El Hanandeh, 2019), sorghum (Silas, 2017), agave fibres (Medellin-Castillo, 2017), yam shells and palm residues (Candelaria; Tejada-Tovar, Herrera- Barros, & Ruiz-Paternina, 2016). Finding those plant-based biomaterials is an excellent alternative for the removal of Pb(II) due to their chemical properties and physical characteristics (Amro, Abhary, Shaikh, & Ali, 2019).…”