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首页> 外文期刊>Chemosphere >Cadmium removal from soil by fulvic acid-aided hydroxyapatite nanofluid
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Cadmium removal from soil by fulvic acid-aided hydroxyapatite nanofluid

机译：富里酸辅助羟基磷灰石纳米流体从土壤中去除镉

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摘要

Mobile engineered nanoparticles have the potential for removing a variety of pollutants from contaminated soils. In this study, elution of soil cadmium (Cd) by nano hydroxyapatite (nHAP) suspension was investigated at different concentrations of fulvic acid (FA). The nHAP nanofluid (500 mg L-1) increased the elution rate of soil Cd by similar to 4.34 times (from 0.64% to 2.78%) compared with nHAP-free background solution due to a similar to 2 order of magnitude larger adsorption capacity of Cd on nHAP than on the experimental loamy soil. FA played an indispensable role in the efficient removal of Cd by nHAP from the soil. The elution rate of soil Cd increased from 2.78% to 331%, 4.37%, 5.45%, and 8.46% after adding 20, 100, 200, and 500 mg L-1 of FA to the nHAP nanofluid (500 mg L-1), respectively. This linear facilitation (i.e., addition of each 100 mg L-1 of FA increased Cd elution by similar to 1%) is attributed to FA-enhanced nHAP mobility and FA-strengthened Cd transfer from soil to nHAP. This study suggests that flushing with the environment-friendly, cost-effective, and FA-containing nHAP nanofluid can effectively remove Cd from soil, given that leachate could be collected by subsurface drainage tiles. (C) 2018 Elsevier Ltd. All rights reserved.
机译：流动工程纳米粒子具有从受污染的土壤中去除多种污染物的潜力。在这项研究中，研究了在不同浓度的富里酸（FA）下，纳米羟基磷灰石（nHAP）悬浮液对土壤镉（Cd）的洗脱。与不含nHAP的背景溶液相比，nHAP纳米流体（500 mg L-1）与无nHAP的背景溶液相比，土壤Cd的洗脱速率增加了约4.34倍（从0.64％到2.78％），这是因为其吸附能力提高了2个数量级镉在nHAP上比在实验性壤土上高。 FA在nHAP从土壤中有效去除Cd方面起着不可或缺的作用。在nHAP纳米流体（500 mg L-1）中添加20、100、200和500 mg L-1 FA后，土壤Cd的洗脱率从2.78％分别提高到331％，4.37％，5.45％和8.46％。 ， 分别。这种线性促进作用（即，每添加100 mg L-1的FA可使Cd洗脱增加近1％）归因于FA增强了nHAP的迁移率，以及FA增强了Cd从土壤向nHAP的转移。这项研究表明，考虑到渗滤液可以通过地下排水瓦收集，用环保，成本效益高且含有FA的nHAP纳米流体冲洗可以有效地从土壤中去除Cd。 （C）2018 Elsevier Ltd.保留所有权利。

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  • 来源
    《Chemosphere》 |2019年第1期|227-233|共7页
  • 作者

    Li Qi; Chen Xijuan; Chen Xin; Jin Yan; Zhuang Jie;

  • 作者单位

    Chinese Acad Sci, Inst Appl Ecol, Key Lab Pollut Ecol & Environm Engn, Shenyang 110016, Liaoning, Peoples R China;

    Univ Chinese Acad Sci, Beijing 100039, Peoples R China;

    Univ Delaware, Dept Plant & Soil, Newark, DE 19716 USA;

    Univ Tennessee, Ctr Environm Biotechnol, Dept Biosyst Engn & Soil Sci, Knoxville, TN 37996 USA;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Nanoparticles; Transport; Heavy metal; Fulvic acid; Soil remediation; Elution;

    机译：纳米颗粒;运输;重金属;富里酸;土壤修复;洗脱;

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