何欣,王玉榮,喻杏元,蔣欽鳳
羥基磷灰石/殼聚糖復(fù)合材料對(duì)六價(jià)鉻離子的吸附性能研究
何欣,王玉榮,喻杏元,蔣欽鳳
(武漢工程大學(xué) 環(huán)境與城市建設(shè)學(xué)院,湖北 武漢 430073)
羥基磷灰石;殼聚糖;六價(jià)鉻;吸附
六價(jià)鉻離子毒性強(qiáng),易被人體吸收并蓄積,攝入過多則會(huì)致癌、致畸和致突變[1-3]. 鉻離子在電鍍、制革、采礦和印染等工業(yè)廢水中大量存在,目前比較常用的去除鉻離子的方法主要有化學(xué)沉淀法、生化法、離子交換法和吸附法等[4-7]. 其中基于環(huán)境礦物材料的吸附法被認(rèn)為是最有效的治理方法之一,沸土、蒙脫土、硅藻土、羥基磷灰石、膨潤(rùn)土、高嶺土等礦物材料因其來(lái)源廣泛、價(jià)格低廉易得、再生容易、可多次重復(fù)使用及無(wú)二次污染等特點(diǎn),在重金屬?gòu)U水處理研究中受到廣泛關(guān)注[8-11].
主要實(shí)驗(yàn)儀器設(shè)備:離心機(jī)(德國(guó)SIGMA公司);恒溫水浴鍋XMTD-204(北京中西遠(yuǎn)大科技有限公司);馬弗爐DC-B(北京獨(dú)創(chuàng)科技有限公司);分析天平EN1862(上海民橋精密科學(xué)儀器有限公司);紫外可見分光光度計(jì)UV2800(上海朗鉑儀器有限公司).
圖1 羥基磷灰石與復(fù)合材料的XRD圖譜
2.1.1 XRD
羥基磷灰石及羥基磷灰石/殼聚糖復(fù)合材料的XRD圖譜如圖1所示. 與羥基磷灰石的XRD圖譜相比,復(fù)合材料中羥基磷灰石的特征峰并未發(fā)生明顯變化,這表明與殼聚糖復(fù)合后,羥基磷灰石的結(jié)構(gòu)和晶型并未發(fā)生明顯變化. 由此說明復(fù)合材料中羥基磷灰石結(jié)構(gòu)穩(wěn)定.
2.1.2 SEM
圖2 羥基磷灰石與復(fù)合材料的SEM圖
圖3 羥基磷灰石對(duì)不同濃度的吸附性能
圖4 羥基磷灰石與復(fù)合材料吸附性能比較
圖5 復(fù)合材料與物理混合材料吸附的性能比較
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[責(zé)任編輯:熊玉濤]
A Study of the Adsorption Properties of Hydroxyapatite/chitosan Composite Material for Cr (Ⅵ)
HEXin, WANGYu-rong, YUXing-yuan, JIANGQin-feng
(School of Environment and Urban Construction, Wuhan University of Engineering, Wuhan 430073, China)
Hydroxyapatite and hydroxyapatite / chitosan composite material are prepared by the coprecipitation method. The structure of the material is characterized by means of SEM and XRD and the change in structure and adsorption properties after hydroxyapatite and chitosan are compounded is studied. Results show that after compounding with chitosan, the structure and crystal structure of hydroxyapatite does not change, but the particle dispersion performance improves; hydroxyapatite and chitosan compound in organic combination and has better adsorption properties than pure hydroxyapatite.
hydroxyapatite; chitosan; hexavalent chromium; adsorption
1006-7302(2013)04-0027-04
X52
A
2013-07-16
國(guó)家自然科學(xué)基金資助項(xiàng)目(No.51374157);教育部新世紀(jì)優(yōu)秀人才計(jì)劃項(xiàng)目(NCET-12-0713)
何欣(1992—),女,湖北黃岡人,在讀本科生,主要從事水污染防治研究.