Efficient removal and recovery of phosphate by biochar loaded with ultrafine MgO nanoparticles.

IF 7.7 2区 环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES
Yanpeng Huang, Qiong Wu, Jingfan Yan, Fumin Chu, Yuming Xu, Dongmin Li, Hongjia Zhang, Sen Yang
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引用次数: 0

Abstract

Biochar loaded with MgO is a promising adsorbent for the removal and recovery of phosphate from aqueous solutions. However, its phosphate adsorption capacity is unsatisfactory, especially at low phosphate concentrations. Loading nanoscale MgO onto biochar is an effective strategy. Here, ultrafine MgO nanoparticles and MgO nanosheets were loaded onto biochar from steam-exploded straw (UMB and SMB) via an impregnation-precipitation-pyrolysis method. The crystal sizes of ultrafine MgO nanoparticles and MgO nanosheets were about 6-8 nm and 10-16 nm, respectively. The phosphate adsorption capacity of UMB at C0 = 100 mg P L-1 was 219.4 mg P g-1, which was higher than that of SMB (164.9 mg P g-1). The results suggest that surface precipitation was the dominant adsorption mechanism and the hydration process and the smaller particle size of MgO may play a key role in the superior phosphate removal by UMB. Removal tests in real low-concentration phosphate water samples showed that 0.05 g L-1 UMB could reduce the phosphate concentration from 0.17 mg P L-1 to 0.01 mg P L-1. In addition, phosphate could be desorbed from UMB in varying environments, and therefore has the potential to be used in fertilizer production or directly as a slow-release fertilizer.

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来源期刊
Environmental Research
Environmental Research 环境科学-公共卫生、环境卫生与职业卫生
CiteScore
12.60
自引率
8.40%
发文量
2480
审稿时长
4.7 months
期刊介绍: The Environmental Research journal presents a broad range of interdisciplinary research, focused on addressing worldwide environmental concerns and featuring innovative findings. Our publication strives to explore relevant anthropogenic issues across various environmental sectors, showcasing practical applications in real-life settings.
文献相关原料
公司名称 产品信息 采购帮参考价格
阿拉丁 C4H4KO7Sb·0.5H2O
阿拉丁 (NH4)6Mo7O24·4H2O
阿拉丁 C4H4KO7Sb·0.5H2O
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