期刊论文

Effects and mechanisms of magnetic iron supported on rice husk biochar removing Pb~(2+) in wastewater

Liao, B.

中文

环境工程学报

1673-9108

2017

11

3

1437-1444

10.12030/j.cjee.201511081

国家自然科学基金资助项目（41501344）； 农业部与财政部科研专项（农办财函[2014]28号）； 湖南省重点学科建设项目（2006180）；

本校为第一且通讯机构

将谷壳生物炭用酸改性后负载磁性Fe_3O_4,得到一种新的吸附材料(BC-Fe)。通过单因素吸附实验,研究了时间、pH、添加量、浓度以及温度等参数对BC-Fe吸附废水中Pb~(2+)的影响,并对其进行比表面积及傅里叶红外光谱分析,探讨该磁性生物炭对Pb~(2+)的吸附机理。结果表明,BC-Fe对Pb~(2+)的吸附能在2 h内基本达到平衡。在Pb~(2+)溶液初始浓度为100 mg·L~(-1),pH=5.0,温度为25 ℃,分别添加0.1 g和0.15 g的BC-Fe于50 mL Pb~(2+)溶液中,单位质量的BC-Fe对溶液中Pb~(2+)的吸附量分别为40.6 mg·g~(-1)和33.2 mg·g~(-1),去除率分别为81.3%和99.9%。该吸附过程符合拟二级动力学模型,理论平衡吸附量为43.9 m...

In this study, rice husk biochar was modified by acid and loaded with magnetic nano-Fe3O4, forming a new adsorbent material (named BC-Fe). A one-factor batch experiment was conducted using BC-Fe to remove Pb2+ ions from simulated wastewater, considering such factors as contact time, solution pH, adsorbent dose, initial Pb2+ concentration, and temperature. Meanwhile, the specific surface area and Fourier transform infrared spectra of BC-Fe were analyzed. The purpose of this study was to investigate the characteristics and mechanisms of Pb2+ adso...