Journal
SUSTAINABILITY
Volume 14, Issue 4, Pages -Publisher
MDPI
DOI: 10.3390/su14042040
Keywords
bamboo biochar; KMnO4 modified; MG; Pb2+; adsorption mechanism
Funding
- National Natural Science Foundation of China [41301343]
- Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection (Guangxi Normal University), Ministry of Education, China [ERESEP2021Z15]
Ask authors/readers for more resources
This study evaluated the feasibility and mechanism of removing Pb2+ and MG from wastewater using KMnO4-modified bamboo biochar (KBC). The results show that KBC has high adsorption capacities for Pb2+ and MG, and the mechanisms of adsorption are different.
In this study, the feasibility and mechanism of Pb2+ and malachite green (MG) adsorption from wastewater using KMnO4-modified bamboo biochar (KBC) was evaluated. The KBC was characterized by SEM-EDS, XRD, FTIR and XPS. The adsorption results for Pb2+ conformed to pseudo-second-order kinetics and the Langmuir model theory. Unlike the case for Pb2+, the Freundlich model better described the adsorption behaviour of MG, indicating that adsorption occurred within multiple molecular layers. Both pseudo-first-order kinetics and pseudo-second-order kinetics fit the MG adsorption data well, indicating that physical adsorption was involved in the adsorption process. In addition, the maximum adsorption capacity for Pb2+/MG was 123.47/1111.11 mg center dot g(-1), KBC had high adsorption capacities for Pb2+ and MG, and the mechanisms of Pb2+ adsorption were mineral precipitation, functional group complexation, and cation-pi interactions, while the main mechanisms for MG adsorption were pore filling, pi-pi interactions, and functional group complexation. In this study, KMnO4-modified biochar was prepared and used as an efficient adsorbent, and showed good application prospects for treatment of wastewater containing MG and Pb2+.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available