Sorption of cadmium onto Mg-Fe Layered Double Hydroxide (LDH)-Kiwi branch biochar

被引：36
|
作者：
Tan, Yuehui [1 ]
Yin, Xianqiang [1 ,2 ]
Wang, Caiyun [1 ]
Sun, Huimin [1 ,2 ]
Ma, Aisheng [1 ]
Zhang, Guilong [3 ]
Wang, Nong [3 ]
机构：
[1] Northwest A&F Univ, Coll Nat Resources & Environm, Yangling, Shaanxi, Peoples R China
[2] Minist Agr, Key Lab Plant Nutr & Agrienvironm Northwest China, Yangling, Shaanxi, Peoples R China
[3] Minist Agr, Agroenvironm Protect Inst, Tianjin, Peoples R China
来源：
ENVIRONMENTAL POLLUTANTS AND BIOAVAILABILITY | 2019年 / 31卷 / 01期
基金：
中国国家自然科学基金;
关键词：
Kiwi; characterization; modified biochar; layered double hydroxides; Cd(II); AQUEOUS-SOLUTIONS; SELECTIVE ADSORBENTS; OXO-ANIONS; ADSORPTION; REMOVAL; SOIL; WATER; PHOSPHATE; KINETICS; LEAD;
D O I：
10.1080/26395940.2019.1604165
中图分类号：
Q5 [生物化学]; Q7 [分子生物学];
学科分类号：
071010 ; 081704 ;
摘要：
The Cd(II) adsorption of kiwi biochar functionalized with Mg-Fe (3:1) layered double hydroxides (LDH) was studied. And the biochar was got via liquid-phase deposition, by incorporating Mg-Fe layered double hydroxide (Mg-Fe LDH) particles into kiwi biochar (KB/LDH). The batch of sorption experiments were studied, including adsorption kinetics and isotherm and the effects of pH, ion strength (IS) and co-existing ions. The KB/LDH composite showed a strong sorption ability to Cd(II) in aqueous solutions with the adsorption capacity of 25.6 mg g(-1), compared with pristine biochar of 1.78 mg g(-1). The adsorption of Cd(II) on KB/LDH composite increased with the decreasing of IS, decreased first and then grew larger with the increase of pH and was observed irrespective of the co-existence of K+, Cl- and NO3-. To sum up, the KB/LDH can be potentially used as an alternative adsorbent to amend the water and soil contaminated by Cd(II).
引用
收藏
页码：189 / 197
页数：9
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