High adsorption of Cd (II) by modification of synthetic zeolites Y, A and mordenite with thiourea

Shaoqing Zhang; Tianming Lv; Yang Mu; Jiqi Zheng; Changgong Meng

doi:10.1016/j.cjche.2020.07.046

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High adsorption of Cd (II) by modification of synthetic zeolites Y, A and mordenite with thiourea

Energy, Resources and Environmental Technology | Updated：2026-01-06

- High adsorption of Cd (II) by modification of synthetic zeolites Y, A and mordenite with thiourea
- Chinese Journal of Chemical Engineering Vol. 28, Issue 12, Pages: 3117-3125(2020)
- Affiliations：
  
  1. Anhui Science and Technology University,Bengbu,China,239000
  2. School of chemical engineering, Dalian University of Technology,Dalian,China,116024
  3. Department of materials science and engineering, University of Washington,WA,Seattle,USA,98125
- Author bio：
- Funds：
- DOI：10.1016/j.cjche.2020.07.046
  CLC：
- Published：2020
- Accepted：
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Shaoqing Zhang, Tianming Lv, Yang Mu, Jiqi Zheng, Changgong Meng. High adsorption of Cd (II) by modification of synthetic zeolites Y, A and mordenite with thiourea[J]. Chinese Journal of Chemical Engineering, 2020, 28(12): 3117-3125.
DOI：

Shaoqing Zhang, Tianming Lv, Yang Mu, Jiqi Zheng, Changgong Meng. High adsorption of Cd (II) by modification of synthetic zeolites Y, A and mordenite with thiourea[J]. Chinese Journal of Chemical Engineering, 2020, 28(12): 3117-3125. DOI： 10.1016/j.cjche.2020.07.046.

摘要

Abstract

Zeolites Y

A and mordenite (ZY

ZA and ZM) were obtained from diatomite in a template-free system

and the products were modified by thiourea (TU). Characterization studies results indicated that the TU molecules were loaded onto the exterior surfaces of the synthetic zeolites as well as the channels. Elemental analysis and energy-dispersive X-ray spectrometer proved that the TU molecules loaded on to ZA were more than ZY and ZM. Removal of Cd(II) was investigated

and it was found that the modified zeolites have higher removal capacity

modified ZA is especially noticeable. In the adsorption experiments

the effects of various parameters such as sorbent content

contact time

concentration of cadmium solution

selectivity and regeneration were discussed. At the best removal efficiency by modified zeolites

the maximum adsorption capacity is 94.3 mg·g

-1

103.2 mg·g

-1

and 89.7 mg·g

-1

at 25℃

respectively. The sorbents show good efficiency for the removal of Cd(II) in the presence of different multivalent cations and have good regeneration effect. For the modified samples

removal experiments take place

via

ion exchange and c

omplexation processes.

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