Facile conversion of kaolinite into clay nanotubes (KNTs) of enhanced adsorption properties for toxic heavy metals (Zn~(2+), Cd~(2+), Pb~(2+), and Cr~(6+)) from water

Abukhadra Mostafa R.; Bakry Belal Mohamed; Adlii Alyaa; Yakout Sobhy M.; El-Zaidy Mohamed E.

首页> 外文期刊>Journal of Hazardous Materials >Facile conversion of kaolinite into clay nanotubes (KNTs) of enhanced adsorption properties for toxic heavy metals (Zn~(2+), Cd~(2+), Pb~(2+), and Cr~(6+)) from water

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Facile conversion of kaolinite into clay nanotubes (KNTs) of enhanced adsorption properties for toxic heavy metals (Zn~(2+), Cd~(2+), Pb~(2+), and Cr~(6+)) from water

机译：高岭石容易地转化为对水中有毒重金属（Zn〜（2 +），Cd〜（2 +），Pb〜（2+）和Cr〜（6+）的吸附性能增强的粘土纳米管（KNT）

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Kaolinite nanotubes (KNTs) were synthesized from kaolinite by ultrasonic scrolling and characterized using X-ray diffractometer, scanning and transmission electron microscopes; and FTIR-FT Raman spectrometer. The synthetic KNTs appear as multi-walled scrolls of 12 nm average pore diameter and 50-600 nm particle length; and exhibit surface area of 105 m(2)/g. KNTs were used as adsorbents for Zn2+, Cd2+, Pb2+, and Cr6+ with uptake capacities of 103 mg/g, 116 mg/g, 89 mg/g, and 91 mg/g, respectively. The equilibration time of Cd2+ and Pb2+ adsorption is 360 min and for Cr6+ and Zn2+ area 120 min and 240 min, respectively. KNTs adsorption systems can be described mainly by Lagergren-second order and Freundlich models (R-2 0.95) as kinetic and isotherm models. This reflected multilayer adsorption forms with chemical sharing or ion exchange processes. KNTs exhibits high reusability and used for five cycles in the removal of the studied metals (100 mg/L). The removal percentages declined by 20.5%, 15.12%, 22.8% and 23.16% with repeating the reused cycles from cycle 1 to cycle 5 for Zn2+, Cd2+, Pb2+, and Cr6+, respectively. KNTs were applied successfully in realistic purification of tap water, groundwater, and sewage water from the inspected metals.

机译：高岭石的超声滚动法合成高岭石纳米管（KNTs），并用X射线衍射仪，扫描和透射电子显微镜表征。和FTIR-FT拉曼光谱仪。合成的KNT表现为平均孔径为12 nm且颗粒长度为50-600 nm的多壁涡卷；表面积为105 m（2）/ g。 KNT被用作Zn2 +，Cd2 +，Pb2 +和Cr6 +的吸附剂，吸收容量分别为103 mg / g，116 mg / g，89 mg / g和91 mg / g。 Cd2 +和Pb2 +吸附的平衡时间为360分钟，而Cr6 +和Zn2 +吸附的平衡时间分别为120分钟和240分钟。 KNTs吸附系统主要可以通过Lagergren二级模型和Freundlich模型（R-2> 0.95）描述为动力学模型和等温线模型。这种反射的多层吸附形式具有化学共享或离子交换过程。 KNTs具有很高的可重复使用性，并且在去除所研究的金属（100 mg / L）时使用了五个循环。从Zn2 +，Cd2 +，Pb2 +和Cr6 +的循环1到循环5重复使用循环，去除率分别下降了20.5％，15.12％，22.8％和23.16％。 KNT成功应用于从被检查金属中实际净化自来水，地下水和污水。

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来源
《Journal of Hazardous Materials》 |2019年第15期|296-308|共13页
作者
Abukhadra Mostafa R.; Bakry Belal Mohamed; Adlii Alyaa; Yakout Sobhy M.; El-Zaidy Mohamed E.;
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作者单位

Beni Suef Univ, Fac Sci, Geol Dept, Bani Suwayf, Egypt;

Beni Suef Univ, Fac Sci, Dept Chem, Bani Suwayf 62514, Egypt;

Beni Suef Univ, Fac Educ, Dept Chem, Bani Suwayf 62514, Egypt;

King Saud Univ, Coll Sci, Biochem Dept, POB 2455, Riyadh 11451, Saudi Arabia|Atom Energy Author, Hot Labs & Waste Management Ctr, Cairo 13759, Egypt;

King Saud Univ, Bot & Microbiol Dept, Coll Sci, POB 2455, Riyadh 11451, Saudi Arabia;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
原文格式 PDF
正文语种 eng
中图分类
关键词
Kaolinite nanotubes; Heavy metals; Adsorption; Kinetics; iSotherm;

机译：高岭土纳米管;重金属;吸附;动力学;iSotherm;

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Facile conversion of kaolinite into clay nanotubes (KNTs) of enhanced adsorption properties for toxic heavy metals (Zn~(2+), Cd~(2+), Pb~(2+), and Cr~(6+)) from water

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