Magnesium Oxide Embedded Nitrogen Self-Doped Biochar Composites: Fast and High-Efficiency Adsorption of Heavy Metals in an Aqueous Solution
Magnesium Oxide Embedded Nitrogen Self-Doped Biochar Composites: Fast and High-Efficiency Adsorption of Heavy Metals in an Aqueous Solution
复制标题
氧化镁嵌入氮自掺杂生物炭复合材料：快速高效吸附水溶液中的重金属
DOI：
10.1021/acs.est.7b02382
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发表时间：
2017-09-05
影响因子：
11.4
通讯作者：
Jiang, Hong
中科院分区：
文献类型：
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作者：
Ling, Li-Li;Liu, Wu-Jun;Jiang, Hong
天然水体中的铅污染对水生态系统和人类健康具有严重的毒性作用，而吸附是去除水体中铅的有效方法。吸附剂与被吸附物之间的表面相互作用在吸附过程中起着主导作用，适当地设计材料表面性质对提高吸附性能至关重要。本研究以富氮水生植物为原料，通过一锅法快速热解制备了氧化镁（MgO）纳米颗粒负载于氮掺杂生物炭（MgO@N-biochar）上，以增加可交换离子和含氮官能团，促进对Pb 2+的吸附。合成的MgO@N-biochar对水溶液中的Pb具有高的吸附性能，具有大的吸附容量（893 mg/g），非常短的平衡时间（
Lead (Pb) pollution in natural water bodies is an environmental concern due to toxic effects on aquatic ecosystems and human health, while adsorption is an effective approach to remove Pb from the water. Surface interactions between adsorbents and adsorbates play a dominant role in the adsorption process, and properly engineering a materials surface property is critical to the improvement of adsorption performance. In this study, the magnesium oxide (MgO) nanoparticles stabilized on the N-doped biochar (MgO@N-biochar) were synthesized by one-pot fast pyrolysis of an MgCl2-loaded N-enriched hydrophyte biomass as a way to increase the exchangeable ions and N-containing functional groups and facilitate the adsorption of Pb2+. The as-synthesized MgO@N-biochar has a high performance with Pb in an aqueous solution with a large adsorption capacity (893 mg/g), a very short equilibrium time (