Nuclear Techniques ›› 2019, Vol. 42 ›› Issue (11): 110303-110303.doi: 10.11889/j.0253-3219.2019.hjs.42.110303

• NUCLEAR CHEMISTRY, RADIOCHEMISTRY, RADIOPHARMACEUTICALS AND NUCLEAR MEDICINE • Previous Articles     Next Articles

Adsorption mechanism of U(VI) by saponite colloid

Zuoyong DU1,Xueling ZHANG2,Jian MA2,Xianguo TUO1,3(),Yuting ZHAO1,Shujuan YU1   

  1. 1. Laboratory of National Defense for Radioactive Waste and Environmental Security, Southwest University of Science and Technology, Mianyang 621010, China
    2. China Nuclear Power Engineering Co. , Ltd. , Shenzhen 518000, China
    3. Sichuan University of Science & Engineering, Zigong 643000, China
  • Received:2019-07-08 Revised:2019-10-18 Online:2019-11-10 Published:2019-11-18
  • Contact: Xianguo TUO E-mail:tuoxg@cdut.edu.cn
  • About author:DU Zuoyong, male, born in 1994, graduated from Southwest University of Science and Technology in 2017, master student, focusing on nuclide migration
  • Supported by:
    National Natural Science Foundation of China(41630646);National Natural Science Youth Fund of China(41603124)

Abstract: Background

The research of radionuclide adsorped by colloids can provide understanding data and vital technical reference for the mechanism of clay colloid nuclide migration in the safety assessment of high-level radioactive waste repository.

Purpose

This study aims to provide basic data and technical basis for the study of nuclide migration mechanism in clay mineral colloid processing system.

Methods

The structure and adsorption mechanism of saponite colloid were investigated by means of infrared spectrum (FT-IR), X-ray fluorescence spectrum (XRF) and scanning electron microscope (SEM) of laser granulator Zeta potentiometer. The contacting time, pH, particles and humic acid concentration were studied by static adsorption experiments.

Results

Experimental results showed that different types of particles in the solution have a huge influence on the adsorption. Best adsorption efficiency was achieved when the adsorption equilibrium time was 20 min, pH=6, humic acid was 2 mg.

Conclusions

The saponite colloid has excellent adsorption properties and is expected to be an adsorbent material capable of effectively treating uranium-containing wastewater.

Key words: Saponite, Colloid, U(VI), Adsorption, Mechanism

CLC Number: 

  • TL941