期刊论文

Adsorption of As(Ⅴ) from Aqueous Solution by Sodium and Silicate-Modified Carbonate Hydroxyapatite Composite

Tang, W.

中文

环境科学研究

1001-6929

2018

31

11

1925-1932

10.13198/j.issn.1001-6929.2018.07.22

No.21603065:国家自然科学基金 No.HJ15K01:湖南省普通高校哲学社会科学重点研究基地环境教育研究中心项目 No.GN18K02:湖南省普通高等学校重点实验室开放基金功能金属有机材料项目

本校为通讯机构

由于自然和人为活动导致自然水体和土壤被As(砷)污染,严重危及生态环境并已受到广泛关注.为实现更大程度地去除含As废水的新型吸附材料,以废弃蛋壳为原材料,采用超声波法制备多孔状且较大比表面积的Na-Si-CHAP〔Ca_(10-x)Na_x(PO_4)_(6-y-z)(SiO4) z(CO_3) y(OH)2-α,载钠硅碳羟基磷灰石〕,深入分析去除含As(Ⅴ)废水的吸附特性.通过BET比表面积、扫描电镜(SEM)、EDX(能量色散X射线光谱)、X-射线衍射(XRD)等手段对样品进行表征,并进一步探讨了pH、吸附时间、初始ρ〔As(Ⅴ)〕以及反应温度等因素对吸附效果的影响.结果表明:在pH为6.0、作用时间为60 min、反应温度为313 K等优化条件下,0.2 g Na-Si...

Arsenic contamination in water and soil due to natural and anthropogenic activities has been documented as a serious problem worldwide, posing a major threat to the environment. The present study focuses on the synthesis of sodium- and silicate-modified carbonate hydroxyapatite composites (Na-Si-CHAP) with relatively high specific area and pore volume, as a novel adsorbent for arsenic removal. The crystallized adsorbent was prepared by an ultrasonic method using waste egg shells and employed for enhancing the adsorption of As(Ⅴ) from aqueous s...