文章摘要
宋承远, 夏建国, 李琳佳, 李欣雨, 肖欣娟.羟基磷灰石对铅锌矿区土壤吸附Zn2+、Cd2+的影响[J].水土保持学报,2019,33(4):349~356
羟基磷灰石对铅锌矿区土壤吸附Zn2+、Cd2+的影响
Effect of Hydroxyapatite on Adsorption of Zn2+ and Cd2+in Lead-Zinc Mine Area Soils
投稿时间:2019-01-22  
DOI:10.13870/j.cnki.stbcxb.2019.04.049
中文关键词: Zn2+  Cd2+  羟基磷灰石  吸附
英文关键词: Zn2+  Cd2+  hydroxyl apatite  adsorption
基金项目:四川省学术和技术带头人培养基金项目(2014);四川农业大学学科建设双支计划项目(2019)
作者单位E-mail
宋承远1, 夏建国1, 李琳佳1, 李欣雨2, 肖欣娟1 1. 四川农业大学资源学院, 成都 611130

2. 温江区和盛镇党建办
, 成都 611130 
xiajianguo@126.com 
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中文摘要:
      为探究羟基磷灰石(HAP)对矿区土壤重金属的固化效果,采用吸附试验,研究施加HAP的铅锌矿区土壤对Cd2+、Zn2+的动力学吸附和等温吸附效果。结果表明:土壤对Cd2+、Zn2+的吸附量随Cd2+、Zn2+初始浓度的增加而增加;在酸性条件下,其吸附量随pH上升而上升;准二级动力学方程能很好地描述两者的吸附过程,土壤吸附能力随HAP的添加量增大而增强;在Zn—Cd共存体系中,当初始浓度为<20 mg/L时,土壤对Zn2+、Cd2+的吸附无明显差异,2种金属离子竞争力度小,随着初始浓度上升,竞争明显,对Zn2+的最大吸附量能达到单一体系中的79%~87%,而Cd2+的最大吸附量只有单一体系中的57%~72%,Zn2+的竞争力优于Cd2+,Zn2+对Cd2+吸附产生严重的抑制。综上可知,HAP能提高矿区土壤的吸附性能,在Zn、Cd污染土壤中,更能提升土壤对Zn2+的吸附固持能力。
英文摘要:
      To explore the effect of hydroxyapatite (HAP) on the solidification of heavy metals in mining areas, this study conducted the adsorption experiments to study the kinetic adsorption and isothermal adsorption of Cd2+ and Zn2+ in the soil of Pb-Zn mines with HAP. The results showed that the adsorption of Cd2+ and Zn2+ increased with the increase of initial concentrations of Cd2+ and Zn2+; under acidic conditions, the amount of adsorption increased with the increasing pH values; the quasi-second-order kinetic equation could well describe the adsorption process of Zn2+ and Cd2+, soil adsorption capacities increased with the addition of HAP. In the Zn-Cd coexistence system, when the initial concentration was <20 mg/L, the adsorption of Zn2+ and Cd2+ in the soil was not significantly different. The competitiveness of the two metal ions was small, and the competition was obvious as the initial concentrations increased. The maximum adsorption capacities of Zn2+reached 79%~87% in a single system, while the maximum adsorption capacities of Cd2+ was only 57%~72% in a single system. The competitiveness of Zn2+ was better than that of Cd2+, and Zn2+ seriously inhibited the adsorption of Cd2+. In summary, HAP could improve the adsorption performance of soil in the mining area, and enhance the adsorption and retention ability of soil to Zn2+ in Zn and Cd contaminated soils.
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