Zinc oxide monolith nano adsorbent for arsenic removal from groundwater

Name: Kannika Khwamsawat

LCSH: Kasetsart University -- Theses. M.Eng. (Advanced and sustainable Environmental) 2017

Classification :.LCCS: TD427.A77

LCSH: Kasetsart University. Department of Engineering -- Theses

LCSH: Water -- Purification -- Arsenic removal

LCSH: Groundwater -- Arsenic content

LCSH: Zinc oxide

Abstract: The arsenic contamination issue has been a serious problem because of their effect to human health and environment. For arsenic removal, adsorption method has been applied widely to both surface water and groundwater. In this study, zinc oxide (ZnO) nano adsorbents were developed and investigated the performance of arsenic removal from groundwater. ZnO nanoparticles were seeded on the porous substrates, and ZnO nanorods were grown on them, then scanning electron microscope (SEM) was used to determine the physical characteristics. Arsenic adsorption efficiency of developed samples was conducted on a reactor capacity 100-mL with arsenic concentration range 200 – 2000 ppb under condition of continuous stirring. The arsenic concentration changes were measured by using inductively coupled plasma-optical emission spectroscope (ICP-OES) and compared their adsorption efficiencies. The result showed that the nano adsorbent in 20 mM of growth solution expressed the most uniform in size and shape of 100-nm diameter ZnO nanorods which covered the surface of porous substrate, and arsenic removal was 94.7 % after stirring continuously for 30 minutes at pH 7 and room temperature. In addition, the comparison of adsorption between the developed samples and the commercial adsorbents was studied. As results showed the efficiency of arsenic removal by ZnO nano adsorbent better than As 600 commercial adsorbent. The competitive ions that effect to removal efficiency was phosphate. Therefore, the synthesis of ZnO nano adsorbent can be one of effective adsorbent for arsenic removal because of their removal efficiency and no effect to environment.

Kasetsart University. Office of the University Library

Address: Bangkok

Email: tdckulib@ku.ac.th

Name: Jukkrit Mahujchariyawong

Role: Thesis Advisor

Name: Supamas Danwittayakul

Role: Thesis Co-Advisor

Created: 2017

Modified: 2566-06-01

Issued: 2023-06-01

วิทยานิพนธ์/Thesis

application/pdf

URL: https://kasetsart.idm.oclc.org/login?url=https://www.lib.ku.ac.th/KUthesis/2560/kannika-khw-all.pdf

CallNumber: TD427.A77.K37

eng

DegreeName: Master of Engineering

Level: Master's Degree

Descipline: Advanced and sustainable Environmental Engineering

Grantor: Kasetsart University

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