微塑料富集金属铅元素的能力与特征分析
发布时间：2018-11-07 07:57
【摘要】：以微塑料为载体,考察了其对溶液中铅离子的富集能力。首先利用2%HNO_3为解吸溶液,并用超声波仪进行辅助解吸,然后用电感耦合等离子体质谱仪(ICP-MS)测定其吸附的铅含量,从而研究微塑料吸附铅离子的能力。对微塑料的材质、吸附时间、粒径、离子浓度、选择性以及共存离子等进行了考察,分析了微塑料吸附铅离子的特征。实验结果表明:不同材质的微塑料对铅离子的吸附能力不同,其中聚氯乙烯(PVC)、聚丙烯(PP)吸附量最高,分别达到1.32μg/g和0.63μg/g。微塑料粒径越大,其对铅离子的吸附量越低。随着吸附时间和铅离子浓度的增加,微塑料对铅离子的吸附效率出现先升后降的趋势。共存离子实验表明,当溶液中存在其他离子时,不同材质的微塑料对铅离子的吸附能力受到不同程度的影响,当铅离子和铜离子共存时,2种离子存在竞争性吸附现象。该文探索了微塑料对铅离子的吸附特性,可为深入研究海洋中微塑料富集重金属及其环境行为提供理论基础。
[Abstract]:The enrichment ability of lead ion in solution was investigated by using microplastics as carrier. Firstly, 2%HNO_3 was used as desorption solution, and then the adsorbed lead content was determined by inductively coupled plasma mass spectrometer (ICP-MS), then the ability of microplastics to adsorb lead ion was studied. The materials, adsorption time, particle size, ion concentration, selectivity and coexisting ions of microplastics were investigated, and the characteristics of the adsorption of lead ions on microplastics were analyzed. The experimental results showed that the adsorption capacity of lead ions was different among the microplastics with different materials, in which (PVC), polypropylene (PP) had the highest adsorption capacity, reaching 1.32 渭 g / g and 0.63 渭 g / g, respectively. The larger the particle size of microplastics is, the lower the adsorption capacity of lead ion is. With the increase of adsorption time and lead ion concentration, the adsorption efficiency of microplastics on lead ion increased first and then decreased. The experimental results of co-existing ions show that the adsorption ability of microplastics with different materials to lead ion is affected to different extent when other ions exist in the solution. When lead ion and copper ion coexist, the two ions have competitive adsorption phenomenon. In this paper, the adsorption characteristics of lead ions on microplastics have been explored, which can provide a theoretical basis for further study on the enrichment and environmental behavior of heavy metals in marine microplastics.
【作者单位】： 国家海洋局第一海洋研究所海洋生态研究中心;青岛海洋科学与技术国家实验室海洋药物与生物制品功能实验室;青岛海洋科学与技术国家实验室海洋生态与环境科学功能实验室;
【基金】：中央级公益性科研院所基本科研业务费专项资金项目(2016Q02) 泰山学者海外创新人才项目 国家基金委-山东省联合基金项目(U1406403)
【分类号】：O652.6;X55
，
本文编号：2315706
[Abstract]:The enrichment ability of lead ion in solution was investigated by using microplastics as carrier. Firstly, 2%HNO_3 was used as desorption solution, and then the adsorbed lead content was determined by inductively coupled plasma mass spectrometer (ICP-MS), then the ability of microplastics to adsorb lead ion was studied. The materials, adsorption time, particle size, ion concentration, selectivity and coexisting ions of microplastics were investigated, and the characteristics of the adsorption of lead ions on microplastics were analyzed. The experimental results showed that the adsorption capacity of lead ions was different among the microplastics with different materials, in which (PVC), polypropylene (PP) had the highest adsorption capacity, reaching 1.32 渭 g / g and 0.63 渭 g / g, respectively. The larger the particle size of microplastics is, the lower the adsorption capacity of lead ion is. With the increase of adsorption time and lead ion concentration, the adsorption efficiency of microplastics on lead ion increased first and then decreased. The experimental results of co-existing ions show that the adsorption ability of microplastics with different materials to lead ion is affected to different extent when other ions exist in the solution. When lead ion and copper ion coexist, the two ions have competitive adsorption phenomenon. In this paper, the adsorption characteristics of lead ions on microplastics have been explored, which can provide a theoretical basis for further study on the enrichment and environmental behavior of heavy metals in marine microplastics.
【作者单位】： 国家海洋局第一海洋研究所海洋生态研究中心;青岛海洋科学与技术国家实验室海洋药物与生物制品功能实验室;青岛海洋科学与技术国家实验室海洋生态与环境科学功能实验室;
【基金】：中央级公益性科研院所基本科研业务费专项资金项目(2016Q02) 泰山学者海外创新人才项目 国家基金委-山东省联合基金项目(U1406403)
【分类号】：O652.6;X55
，
本文编号：2315706
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