Stabilization of Cd in Ore Soil Using Modified Red Mud Materials

Abstract:

Modifications of red mud for activating available silicon (Si) by phosphates were carried on in this paper. And then the modified red mud materials were used to stabilize Cd in an ore soil. Results indicated that phosphates efficiently increase the content of available Si in red mud. In the stabilization, exchange Cd was decreased by 90.97% when using 5% potassium dihydrogen phosphate modified red mud, which was better than using raw re mud as the decrease was 77.08%. In rice pot soil, increases of residue Cd were positively correlated with the increases of available Si (P<0.05, R=0.9965). Contents of Cd in root increased 53.87% while it in rice decreased 24.17% by adding 3% modified red mud.

• Periodical: Advanced Materials Research (Volume 1142)
• Pages: 296-299
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1142.296
• Online since: January 2017
• Authors: Hui Li Luo*, Qing Zhu, Ying Zhou, Zi Lin Liu, Wei Qi Ou
• Keywords: Cd, Modified, Red Mud, Stabilization

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