【摘要】：以微塑料為載體,考察了其對(duì)溶液中鉛離子的富集能力。首先利用2%HNO_3為解吸溶液,并用超聲波儀進(jìn)行輔助解吸,然后用電感耦合等離子體質(zhì)譜儀(ICP-MS)測(cè)定其吸附的鉛含量,從而研究微塑料吸附鉛離子的能力。對(duì)微塑料的材質(zhì)、吸附時(shí)間、粒徑、離子濃度、選擇性以及共存離子等進(jìn)行了考察,分析了微塑料吸附鉛離子的特征。實(shí)驗(yàn)結(jié)果表明:不同材質(zhì)的微塑料對(duì)鉛離子的吸附能力不同,其中聚氯乙烯(PVC)、聚丙烯(PP)吸附量最高,分別達(dá)到1.32μg/g和0.63μg/g。微塑料粒徑越大,其對(duì)鉛離子的吸附量越低。隨著吸附時(shí)間和鉛離子濃度的增加,微塑料對(duì)鉛離子的吸附效率出現(xiàn)先升后降的趨勢(shì)。共存離子實(shí)驗(yàn)表明,當(dāng)溶液中存在其他離子時(shí),不同材質(zhì)的微塑料對(duì)鉛離子的吸附能力受到不同程度的影響,當(dāng)鉛離子和銅離子共存時(shí),2種離子存在競(jìng)爭(zhēng)性吸附現(xiàn)象。該文探索了微塑料對(duì)鉛離子的吸附特性,可為深入研究海洋中微塑料富集重金屬及其環(huán)境行為提供理論基礎(chǔ)。
[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.
【作者單位】： 國(guó)家海洋局第一海洋研究所海洋生態(tài)研究中心;青島海洋科學(xué)與技術(shù)國(guó)家實(shí)驗(yàn)室海洋藥物與生物制品功能實(shí)驗(yàn)室;青島海洋科學(xué)與技術(shù)國(guó)家實(shí)驗(yàn)室海洋生態(tài)與環(huán)境科學(xué)功能實(shí)驗(yàn)室;
【基金】：中央級(jí)公益性科研院所基本科研業(yè)務(wù)費(fèi)專項(xiàng)資金項(xiàng)目(2016Q02) 泰山學(xué)者海外創(chuàng)新人才項(xiàng)目 國(guó)家基金委-山東省聯(lián)合基金項(xiàng)目(U1406403)
【分類號(hào)】：O652.6;X55
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本文編號(hào)：2315706