Efficient removal of Pb(ii) and Cr(vi) from acidic wastewater using porous thiophosphoryl polyethyleneimine

被引：7
|
作者：
Sun, Junhua [1 ]
Sun, Guoxin [1 ,2 ]
Zhao, Xiuxian [2 ]
Zhao, Heng [1 ]
Yang, Zhongjiang [1 ]
Yan, Liangguo [3 ]
Jiang, Xuchuan [2 ]
Cui, Yu [1 ]
机构：
[1] Univ Jinan, Sch Chem & Chem Engn, 336 Nanxinzhuang West Rd, Jinan 250022, Peoples R China
[2] Univ Jinan, Inst Smart Mat & Engn, 336 Nanxinzhuang West Rd, Jinan 250022, Peoples R China
[3] Univ Jinan, Sch Water Conservancy & Environm, 336 Nanxinzhuang West Rd, Jinan 250022, Peoples R China
来源：
NEW JOURNAL OF CHEMISTRY | 2021年 / 45卷 / 35期
基金：
中国国家自然科学基金;
关键词：
HEAVY-METAL IONS; ADSORPTION BEHAVIOR; SELECTIVE REMOVAL; AQUEOUS-SOLUTIONS; LEAD; ADSORBENT; CU(II); PB2+; MECHANISM; CHITOSAN;
D O I：
10.1039/d1nj02480a
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Removing heavy metal ions from acidic mine wastewater is a big challenge. In this paper, a novel porous thiophosphoryl polyethyleneimine (TPEI) adsorbent was designed for removing Pb(ii) and Cr(vi) from acidic wastewater. The optimum adsorption pH value of TPEI for Pb(ii) and Cr(vi) is 3 and 2, respectively. At 298 K, the maximum adsorption capacity for Pb(ii) and Cr(vi) is 421.9 mg g(-1) and 191.04 mg g(-1), respectively. The adsorption equilibrium time of Pb(ii) and Cr(vi) is 25 min and 10 min, respectively. The adsorption of Pb(ii) and Cr(vi) both conform to the pseudo-second-order model and the Langmuir isotherm model. The adsorption mechanism of Pb(ii) depends on the chelation interaction, while Cr(vi) depends on the electrostatic interaction. The regeneration test shows that the adsorbent is stable and reusable. This study provides a new strategy for the purification of acidic heavy metal wastewater.
引用
收藏
页码：16196 / 16204
页数：9
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