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玉米秸秆生物炭抑制黄铁矿氧化效果 被引量:3

Inhibition Effect of Corn Stover Biochar on Pyrite Oxidation
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摘要 以玉米秸秆生物炭和黄铁矿为研究对象,将表面官能团丰富的生物炭与黄铁矿结合,考察黄铁矿自身氧化及生物炭黄铁矿复合物氧化情况。在分析黄铁矿氧化体系中铁离子浓度的变化的基础上,通过扫描电镜(SEM)、X射线衍射(XRD)、傅立叶变换红外光谱(FTIR)和拉曼光谱(RS)分析玉米秸秆生物炭抑制黄铁矿氧化的机理。结果表明,玉米秸秆生物炭对黄铁矿的氧化有明显的抑制效果,且其抑制效果与生物炭用量成正相关。生物炭与黄铁矿表面可能以Fe-O-C键结合形成覆盖膜,阻挡黄铁矿表面与空气和H_(2)O接触,从而抑制了黄铁矿的化学氧化。 The corn stalk biochar and pyrite was the research objects.The oxidation process of pyrite and the compound of pyrite and biochar were studied because of the rich surface functional groups of biochar.Based on the analysis of iron ion concentration in pyrite oxidation system,the oxidation-inhibited mechanism of pyrite by corn straw biochar was analyzed by X-ray diffraction(XRD),scanning electron microscopy(SEM),Fourier transform infrared spectroscopy(FTIR)and Raman spectroscopy.The experimental results showed that corn straw biochar obviously inhibited the oxidation of pyrite,and the larger the dosage of corn straw biochar,the better the inhibition effect on pyrite oxidation.The surface of biochar and pyrite may be bound by Fe-O-C bond to form a covering film,which can prevent the surface of pyrite from contacting with air and H_(2)O,thus inhibiting the chemical oxidation of pyrite.
作者 李彦盼 李赵芮 鄢顺意 马伟师 康晓跃 黄欣 陈瑞红 张倩 Li Yanpan;Li Zhaorui;Yan Shunyi;Ma Weishi;Kang Xiaoyue;Huang Xin;Chen Ruihong;Zhang Qian(School of Life and Environmental Science,Guilin University of Electronic Technology,Guilin 541006,China)
出处 《广东化工》 CAS 2021年第10期21-24,44,共5页 Guangdong Chemical Industry
基金 国家自然科学基金项目(41967042) 国家大学生创新创业训练计划项目(201810595005,202010595150)。
关键词 生物炭 黄铁矿 酸性矿山废水 钝化 biochar pyrite acid mine drainage(AMD) passivation
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