Passivation and Remediation Effects and Mechanisms of Plant Residual Modified Materials on Lead-Contaminated Soils

被引：1

作者：

Fang Y.-L. ^{[1
,2
,3
]}

Zhu Z.-Q. ^{[1
,2
,3
]}

Zhao N.-N. ^{[1
,2
,3
]}

Zhu Y.-N. ^{[1
,2
,3
]}

Li C. ^{[4
]}

Zhang L.-H. ^{[1
,2
,3
]}

机构：

[1] Collaborative Innovation Center for Water Pollution Control and Water Safety in Karst Area, Guilin University of Technology, Guilin

[2] Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, Guilin University of Technology, Guilin

[3] Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology for Science and Education Combined with Science and Technology Innovation Base, Guilin

[4] Chongqing Tongnan District Hydrological Management Station, Chongqing

来源：

Huanjing Kexue/Environmental Science | 2020年 / 41卷 / 03期

关键词：

Eucalyptus; Hydroxyapatite; Passivation repair; Pb(Ⅱ); Relic structure; Soil;

D O I：

10.13227/j.hjkx.201909122

中图分类号：

学科分类号：

摘要：

The specific characteristics and mechanism of passivation of Pb in soil were studied using HAP/C composite (PBGC-HAP/C) as passivation, and using proportion of PBGC-HAP/C, particle size and type of passivator, soil moisture content, soil pH value of Pb, and particle size of the material as influencing factors. The results showed that with an increase in dosage of the passivator and passivation time, the passivation effect increases gradually. Reducing the particle size of the passivator is beneficial to improving the passivation effect. pH has a greater impact on passivation, with the passivation effect obviously rising with increased pH, and the passivation rate in an alkaline environment can reach above 99%. An increase in water content is beneficial to the improvement of the passivation effect, but the contribution is not significant. Through comparative analysis of the XPS, XRD, and FT-IR of materials before and after passivation, the results indicated that the passivation of PBGC-HAP/C to Pb is mainly through direct and indirect effects. Direct effects include physical adsorption, chemical complexation, electrostatic interaction, ion exchange, and precipitation; the indirect effect is mainly enhanced by increasing the pH value of the organic matter. © 2020, Science Press. All right reserved.

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页码：1498 / 1504

页数：6

共 26 条

[1] Song B., Zeng W.Q., Lu S.F., Et al., Application of phosphorus materials in remediation of lead-contaminated soil, Chinese Journal of Environmental Engineering, 9, 12, pp. 5649-5658, (2015)
[2] Gao Y.Q., Ma Y., The harms of Pb on human body, Inner Mongolian Environmental Sciences, 19, 3, pp. 115-117, (2007)
[3] Xing Y., Zhang Y.H., Wei W.L., Et al., Research progress of using biochar to stabilize cadmium, lead, copper and arsenic contaminated soil, Guizhou Agricultural Sciences, 43, 7, (2015)
[4] Yang J., Mosby D., Field assessment of treatment efficacy by three methods of phosphoric acid application in lead-contaminated urban soil, Science of the Total Environment, 366, 1, pp. 136-142, (2006)
[5] Meng L.R., Yue H.D., Yang T.T., Et al., Immobilization of two biochars to Pb, Cd in contaminated soils, Jiangsu Journal of Agricultural Sciences, 34, 4, pp. 835-841, (2018)
[6] Huang G.Q., Zhao Q.G., The history, status quo, ecological problems and countermeasures of Eucalyptus plantations in Guangxi, Acta Ecologica Sinica, 34, 18, pp. 5142-5152, (2014)
[7] Jurskis V., Eucalypt decline in Australia, and a general concept of tree decline and dieback, Forest Ecology and Management, 215, 1-3, pp. 1-20, (2005)
[8] Yu J.X., Tong M., Sun X.M., Et al., Enhanced and selective adsorption of Pb<sup>2+</sup> and Cu<sup>2+</sup> by EDTAD-modified biomass of baker's yeast, Bioresource Technology, 99, 7, pp. 2588-2593, (2008)
[9] Zou H., Preparation of magnesium doped hydroxyapatite and their adsorption of heavy metals ion, (2017)
[10] Li C., Zhu Z.Q., Cao S., Et al., Adsorption characteristics of copper in water by the porous biomorph-genetic composite of HAP/C with eucalyptus wood template, Environmental Science, 38, 3, pp. 1074-1083, (2017)

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