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

摘要

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 intraand 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.