Preparation of nanocellulose modified with dithizone for separation, extraction and determination of trace amounts of manganese ions in industrial wastewater samples

• Published in: Microchemical journal Vol. 160; p. 105737
• Main Authors: Ahmadi-Asoori, Samaneh, Tazikeh-Lemeski, Elham, Mirabi, Ali, Babanezhad, Esmaeil, Juybari, Mohammad Habibi
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01-01-2021
• Subjects: Cellulose nanofibers; Mn (II) ions preconcentration; Nanocomposite; Surface modification; Surface modification; Nanocomposite; Mn (II) ions preconcentration; Cellulose nanofibers
• ISSN: 0026-265X; 1095-9149
• DOI: 10.1016/j.microc.2020.105737

•The results of study demonstrate that a very sensitive method could be achieved by the development SPE method.•High preconcentration factor was obtained easily through this method and a detection limit at sub ng mL−1 level was achieved.•In this method preparation time as well as consumption of toxic organic solvents was minimized without affecting the sensitivity of the method.•The proposed method has been applied to the determination of Mn (II) ions at trace levels in real samples such as natural water and wastewater samples with satisfactory results.
In order to preconcentrate and clarify the trace amounts of Mn (II) ions, a very efficient natural adsorbent was prepared by cellulose nanofiber and its modification of the surface. Cellulose nanofibers were made by wood pulp hydrolysis using a concentrated acid under sonicating and reflux conditions and modification by dithizone immobilization. The influential elements like pH of extraction, the quantity of nanocomposite, time of extraction, the ionic power and typical volume were made better for numerical clarification of Mn (II) ions. According to findings, there is a linear range for the optimized technique between 1.0 and 15 ng mL−1 by the detection limit of 0.29 ng mL−1. As shown by statistical analysis of the results, there are small intra- and inter-day precision values from 0.8 to 2.7% and 1.6–5.4%, respectively, high pre-concentration factor and enrichment factor. It was found that the maximum adsorption capacity of the nanosorbent is 137 mg g−1. High selectivity and sensitivity were observed in the nanocomposite in terms of detection of low Mn (II) ions concentration at the ng mL−1 level with high precision for the samples.