Use of turnip peel bioadsorbent to remove chromium (VI) from water

Articles in Press

Document Type : Original Article

Authors

1 ِDepartment of Chemical Engineering, Faculty of Engineering, University of Kurdistan, Sanandaj, Iran

2 Faculty of Chemical Engineering, Sahand University of Technology

10.22034/ijche.2023.406957.1333

Abstract

Cr (VI) enters water resources via wastewaters of pigment, tanning, and plating industries. Cr (VI) in water is a dangerous pollutant and carcinogenic. In this work, turnip peel bioadsorbent was used to remove Cr (VI) from water. The SEM images showed porous structure of turnip peel. The specific surface area of turnip peel was measured 4.436 m2/g. The effects of the operating conditions including Cr (VI) solution initial concentration (5 to 20 mg/L) and pH (2 to 10), bioadsorbent dose (10 to 30 g/L), time (0 to 150 min), and temperature (25 to 85 °C) were investigated. Adsorption isotherm corresponded to Langmuir model and maximum adsorption capacity was 14.45 mg/g at pH of 5. Cr (VI) removal of 78.36% was obtained in the operating conditions of initial Cr (VI) concentration of 10 mg/L, pH of 5, time of 60 min, and temperature of 25 °C. Complete removal of Cr (VI) was reached with increase of temperature (to 85 °C) or decrease of pH (to pH of 2). The main advantages of turnip peel bioadsorbent are the low cost, large adsorption capacity, and short time to reach equilibrium and shows the ability of bioadsorbents which usually are from agricultural wastes to remove Cr (VI) from water.

Keywords

Main Subjects

Iranian Chemical Engineering Journal

Articles in Press, Accepted Manuscript
Available Online from 12 November 2023

Files

Share

How to cite

Statistics