Engineered hydrochar composites for phosphorus removal/recovery: Lanthanum doped hydrochar prepared by hydrothermal carbonization of lanthanum pretreated rice straw

被引：106

作者：

Dai, Lichun ^{[1
]}

Wu, Bo ^{[1
]}

Tan, Furong ^{[1
]}

He, Mingxiong ^{[1
]}

Wang, Wenguo ^{[1
]}

Qin, Han ^{[1
]}

Tang, Xiaoyu ^{[1
]}

Zhu, Qili ^{[1
]}

Pan, Ke ^{[1
]}

Hu, Qichun ^{[1
]}

机构：

[1] Minist Agr, Biogas Inst, Biomass Energy Technol Res Ctr, Chengdu 610041, Peoples R China

来源：

BIORESOURCE TECHNOLOGY | 2014年 / 161卷

基金：

中国国家自然科学基金;

关键词：

Hydrothermal carbonization; Lanthanum; Hydrochar composite; Phosphorus removal; Phosphorus recovery; ACTIVATED CARBON-FIBER; PHOSPHATE REMOVAL; WASTE-WATER; ADSORPTION; SORPTION; MECHANISMS; ZN(II); OXIDE;

D O I：

10.1016/j.biortech.2014.03.086

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

Engineered hydrochar composites (EHC) were synthesized by hydrothermal carbonization (HTC) of lanthanum pretreated rice straw. The as-prepared composite with about 30% lanthanum content showed greater P removal potential than La(OH)(3), indicating the synergistic effect of hydrochar and lanthanum in P removal. The adsorption results showed that EHC showed great P adsorption capacities (>50 mg P g (1)) in the pH range of 2.5-10.5, and the presence of competing anions had little negative effects on P adsorption on EHC. The equilibrium time for P adsorption on EHC was considerably reduced under acid condition (12 h) compared to alkaline condition (48 h). The maximum adsorption capacity was 61.57 mg P g (1) according to Langmuir isotherms. These results suggested that EHC was highly effective in P adsorption in a wide range of pH and the presence of competing anions, thus EHC could be a promising adsorbent for phosphorus removal/recovery from wastewater. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：327 / 332

页数：6

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