Journal
JOURNAL OF HAZARDOUS MATERIALS
Volume 412, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.jhazmat.2021.125199
Keywords
Loess utilization; Cancrinite zeolite; Heavy metal polluted soil remediation; Soil for soil-remediation
Categories
Funding
- Foundation of Shenzhen Science and Technology Innovation Commission [JCYJ20190809144409460]
- National Natural Science Foundation of China [21777045]
- Natural Science Funds for Distinguished Young Scholar of Guangdong Province, China [2020B151502094]
Ask authors/readers for more resources
This study introduces a soil for soil-remediation strategy using natural loess to convert into zeolite for remediating heavy metal polluted soil in the Chinese Loess Plateau (CLP). The synthesized zeolite shows excellent remediation performance for Pb(II) and Cu(II) polluted soil, effectively reducing the uptake and accumulation of these ions in vegetables with high removal efficiencies. This work paves the way for developing green and sustainable remediation eco-materials with local loess as raw materials.
Both soil erosion and soil contamination pose critical environmental threats to the Chinese Loess Plateau (CLP). Green, efficient and feasible remediation technologies are highly demanded to meet these challenges. Herein we propose a unique ?soil for soil-remediation? strategy to remediate the heavy metal polluted soil in CLP by converting loess into zeolite for the first time. With a simple template-free route, the natural loess can be converted into cancrinite (CAN) type of zeolite. A highly crystalline CAN was obtained via hydrothermal treatment at 240 oC for 48 h, with a precursor alkalinity of Na/(Si+Al)> 2.0. The as-synthesized CAN zeolite exhibits excellent remediation performance for Pb(II) and Cu(II) polluted soil. Plant assay experiment demonstrates that CAN can significantly restrain the uptake and accumulation of Pb(II) and Cu(II) ions in vegetables, with a high removal efficiency up to 90.7% and 81.4%, respectively. This work demonstrates a ?soil for soil-remediation? strategy to utilize the natural loess for soil remediation in CLP, which paves the way for developing green and sustainable remediation eco-materials with local loess as raw materials.
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