Castor Leaves-Based Biochar for Adsorption of Safranin from Textile Wastewater

Sustainability

Nur Atikah Mohidem¹  Abdul Razzaq²  Tahir Fazal³  Muhammad Suleman³  Sadiq Hussain⁴  Muhammad Usman Rashid⁵  Bilal Haider⁵  Muhammad Zafar⁶  Ashfaq Ahmed⁷  Young-Kwon Park⁷ 

[1] Department of Biological and Agricultural Engineering, Faculty of Engineering, Universiti Putra Malaysia, Serdang 43400, Selangor, Malaysia;Department of Chemical Engineering, COMSATS University Islamabad, Lahore Campus, Raiwind Road, Lahore 54000, Pakistan;Department of Chemical Engineering, Khwaja Fareed University of Engineering and Information Technology, Rahim Yar Khan 64200, Pakistan;Department of Chemical Engineering, NFC Institute of Engineering & Technology, Multan 60000, Pakistan;Institute of Chemical Engineering & Technology, Quaid-e-Azam Campus, University of the Punjab, Lahore 54590, Pakistan;Institute of Energy and Environmental Engineering, University of the Punjab, Lahore 54590, Pakistan;School of Environmental Engineering, University of Seoul, Seoul 02504, Korea;

关键词: adsorption;    biochar;    castor biomass;    safranin dye;    wastewater treatment;   

DOI  :  10.3390/su13126926

来源: DOAJ

【 摘 要 】

The prospect of synthesizing biochar from agricultural wastes or by-products to utilize them as a promising adsorbent material is increasingly gaining attention. This research work focuses on synthesizing biochar from castor biomass (CBM) and evaluating its potential as an adsorbent material. Castor biomass-based biochar (CBCs) prepared by the slow pyrolysis process at different temperatures (CBC400 °C, CBC500 °C, and CBC600 °C for 1 h) was investigated for the adsorption of textile dye effluents (safranin). The pyrolysis temperature played a key role in enhancing the morphology, and the crystallinity of the biochar which are beneficial for the uptake of safranin. The CBC600 adsorbent showed a higher safranin dye removal (99.60%) and adsorption capacity (4.98 mg/g) than CBC500 (90.50% and 4.52 mg/g), CBC400 (83.90% and 4.20 mg/g), and castor biomass (CBM) (64.40% and 3.22 mg/g). Adsorption data fitted better to the Langmuir isotherm model than to the Freundlich isotherm model. The kinetics of the adsorption process was described well using the pseudo-second-order kinetic model. The study on the effect of the contact time for the adsorption process indicated that for CBC600, 80% dye removal occurred in the first 15 min of the contact time. After three regeneration cycles, CBC600 exhibited the highest dye removal efficiency (64.10%), highlighting the enhanced reusability of CBCs. The crystalline patterns, functional binding sites, and surface areas of the prepared CBCs (CBC400, CBC500, CBC600) were characterized by X-ray diffraction, Fourier transform infrared spectroscopy, and Brunauer–Emmett–Teller surface area measurements, respectively.

【 授权许可】

Unknown