Experimental study on the adsorption of dissolved heavy metals by nano-hydroxyapatite | Zendy

Yang Zheng | Zendy; JianMin Zhang | Zendy

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Experimental study on the adsorption of dissolved heavy metals by nano-hydroxyapatite

Author(s) -

Yang Zheng,

JianMin Zhang

Publication year - 2020

Publication title -

water science and technology

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.406

H-Index - 137

eISSN - 1996-9732

pISSN - 0273-1223

DOI - 10.2166/wst.2020.465

Subject(s) - adsorption , chemical engineering , nano , scanning electron microscope , heavy metals , humic acid , metal , matrix (chemical analysis) , filler (materials) , chemistry , materials science , metallurgy , composite material , environmental chemistry , organic chemistry , fertilizer , engineering

Bioretention system is an effective way to solve the problem of urban water environment pollution. In this paper, the difficulty of the existing biological retention system to effectively remove dissolved heavy metals was studied. By comparing the adsorption effect of acid quartz sand filler layers with nano-hydroxyapatite (N-HAP), medical stone, nano-carbon, and biochar, the conclusion is drawn from the static and cylinder dynamic experiments that N-HAP has the best effect of removing Cu 2+ and Zn 2+ , and the effect is long lasting. The scanning electron microscopy results showed that the N-HAP particles were rough and the surface was more rod-shaped, which increased the specific surface area of the N-HAP particles, promoted the complexation and electrostatic interaction of the additives and heavy metal solutions, and facilitated the adsorption of heavy metals. The research results help to improve the technology of filler matrix modification.

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