Lead cations adsorption by dentifrice containing nano hydroxyapatite particles with different sizes

YANG Jianzhen; SHEN Xiaoqing; LIU Chengxia; XU Pingping

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Lead cations adsorption by dentifrice containing nano hydroxyapatite particles with different sizes

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- Lead cations adsorption by dentifrice containing nano hydroxyapatite particles with different sizes
- Acta Scientiarum Naturalium Universitatis SunYatseni Vol. 55, Issue 4, Pages: 68-74(2016)
- 作者机构：
  
  1. 南方医科大学附属口腔医院广东省口腔医院牙体牙髓病科，广东广州 ,510280
  2. 南方医科大学珠江医院口腔科,广东,广州,510280
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published：2016，
  
  Published Online：25 July 2016，
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YANG Jianzhen, SHEN Xiaoqing, LIU Chengxia, et al. Lead cations adsorption by dentifrice containing nano hydroxyapatite particles with different sizes. [J]. Acta Scientiarum Naturalium Universitatis SunYatseni 55(4):68-74(2016)
DOI：

YANG Jianzhen, SHEN Xiaoqing, LIU Chengxia, et al. Lead cations adsorption by dentifrice containing nano hydroxyapatite particles with different sizes. [J]. Acta Scientiarum Naturalium Universitatis SunYatseni 55(4):68-74(2016) DOI：

摘要

比较不同粒径的纳米羟基磷灰石（n-HA)及掺入牙膏后对模拟废水中铅离子的吸附能力，并探讨掺n-HA牙膏对铅离子的吸附稳定性及作用机制。配制系列质量浓度的n-HA悬液及掺n-HA牙膏悬液，与初始质量浓度为1 mg/L的模拟铅溶液进行反应，静置24 h、14 d和28 d后，取上清液测定残余铅离子质量浓度，计算吸附率及吸附能力。结果显示，n-HA及其牙膏对铅离子的平均吸附率达95%左右，吸附能力随着HA粒径的减小而增大。掺n-HA牙膏的吸附能力显著优于掺微米级HA牙膏和空白牙膏，吸附作用随时间的推移解吸附现象不明显。HA及其牙膏对铅离子的吸附均符合Langmuir和Freundlish等温模型。研究表明，掺nHA牙膏可有效去除模拟废水中的铅离子，是一种绿色环保的吸附剂，可为人们的日常保健行为赋予环保意义。

Abstract

Toothpaste with nano HA was conducted according to the adsorption of lead ions in synthetic wastewater. Comparisons were made between distinct particle sizes of nano HA based on the adsorption effect of lead ions. Meanwhile

the stability of adsorption and mechanism of nano HA toothpaste was investigated. The suspensions of nano HA

HA dentifrice and blank dentifrice with different concentrations were prepared．Lead ion solutions with initial concentration of 1.0 mg /L were mixed with these suspensions respectively. Following being kept still for 24 h

14 d and 28 d

the residual lead ion concentration of the supernatant was measured

the sorption rate and sorption ability was calculated. The result showed that the nano HA and nano HA dentifrice with various particle sizes had strong abilities of absorbing lead ions from simulated waste water

the average adsorption rate was determined to be 95%. The adsorption capacity of nano HA increased with the decrease of particle sizes. The adsorption capacity of nano HA dentifrice was significantly higher than that of the micro HA dentifrice and blank dentifrice. The effects of nano HA dentifrice group on Pb

 adsorption were relatively stable

of which no desorption were detected subsequently. Both Langmuir and Freundlich equations were sued to simulate the sorption processes of the nano HA and HA dentifrice. The result indicated that the dentifrice containing nano HA could reduce the lead ions effectively，and could be used as an environmental protection absorbent

which is beneficial to giving environmental significance for the daily health caring behavior.

关键词

羟基磷灰石吸附铅离子牙膏纳米

Keywords

hydroxyapatiteadsorptionlead ionsdentifricenano

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Related Institution

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