Biosorption of lead (II) from aqueous solution using Cellulose-based Bio-adsorbents prepared from unripe papaya (Carica papaya) peel waste: Removal Efficiency, Thermodynamics, kinetics and isotherm analysis

Alkaline Modification of Arabica-Coffee and Theobroma-Cocoa Agroindustrial Waste for Effective Removal of Pb(II) from Aqueous Solutions

“…Furthermore, the disappearance of the Na peak on these samples ( Figure 3 right) can be attributed to ionic exchange with Pb(II). Similar morphologies were reported by Jaihan et al [ 5 ] in papaya peels loaded with Pb(II).…”

“…Various methods are used to remove heavy metals, such as Pb, from wastewater: coagulation–flocculation, liquid–liquid extraction, ion exchange, and electrochemical treatment. However, these methods have disadvantages such as the high operating costs, long operating times, and the generation of a large volume of toxic sludge [ 5 , 6 ]. In this context, the removal of contaminants using biological materials (biosorbents), such as algae, cyanobacteria, fungi, or particularly agroindustrial wastes has become an economical, ecological, and promising alternative method compared with the conventional methods mentioned above [ 7 , 8 , 9 , 10 ].…”

Generation of Electricity Through Papaya Waste at Different pH

“…In the same way, Prasidha et al (2020) managed to observe a maximum PD of 27 mW/m 2 on day 3 in their single-chamber cells using fruit and vegetable waste as substrate (Prasidha, W., 2020). peak indicates the presence of alkane C-H stretching, alkene C=C stretching, C==N stretching, primary and secondary amine C-N stretching; and finally, the 1014 cm -1 peak indicates the presence of amide (Ashfaq et al, 2022;Jaihan et al, 2022). In the literature, it has been shown that the presence of phenols increases the release of electrons in different types of bioreactors, which would explain the high values of voltage and current in the MFC at pH 7 (Shen et al, 2021;Hassan et al, 2018).…”

Extraction of Lead Ions and Partitioning Behavior in Aqueous Biphasic Systems Based on Polyethylene Glycol and Different Salts

“…Several processes were used to remove and separate heavy metal ions from natural waters, industrial wastewater, and contaminated soil. 1 The liquid−liquid extraction, 10 cation adsorption, 6 electrochemical treatment, 11 coagulation−flocculation, 12 and biosorption 13 were reported to remove lead from aqueous solutions. In this context of separation, the aqueous two-phase system (ATPS) is more efficient than the typical liquid−liquid extraction in hydrometallurgical processes and has an intriguing possibility for use in the metal recovery process.…”

“…Several processes were used to remove and separate heavy metal ions from natural waters, industrial wastewater, and contaminated soil . The liquid–liquid extraction, cation adsorption, electrochemical treatment, coagulation–flocculation, and biosorption were reported to remove lead from aqueous solutions. In this context of separation, the aqueous two-phase system (ATPS) is more efficient than the typical liquid–liquid extraction in hydrometallurgical processes and has an intriguing possibility for use in the metal recovery process. , The characteristics of ATPS take advantage of being nonflammable, nontoxic, and less harmful than organic solvents − as well as exhibiting lower interfacial tension. − Therefore, the ATPS technique is used in hydrometallurgical processes to selectively recover metals. , The ATPS is created by combining two aqueous solutions (such as polymer/salt or polymer/polymer systems).…”