The Library
Simultaneous stabilization of Pb and improvement of soil strength using nZVI
Tools
Zhou, Wan-Huan, Liu, Fuming, Yi, Shuping, Chen, Yong-Zhan, Geng, Xueyu and Zheng, Chunmiao (2019) Simultaneous stabilization of Pb and improvement of soil strength using nZVI. Science of The Total Environment, 651 (Part 1). pp. 877-884. doi:10.1016/j.scitotenv.2018.09.146 ISSN 0048-9697.
|
PDF
WRAP-simultaneous-stabiliazation-Pb-improvement-soil-strength-Geng-2018.pdf - Accepted Version - Requires a PDF viewer. Available under License Creative Commons Attribution Non-commercial No Derivatives 4.0. Download (1475Kb) | Preview |
Official URL: http://dx.doi.org/10.1016/j.scitotenv.2018.09.146
Abstract
This study demonstrates the feasibility of nanoscale Zero-Valent Iron (nZVI) for simultaneous stabilization of Pb and improvement of soil strength via batch experiments. The soil samples were prepared using slurry and pre-consolidation method at nZVI doses of 0.2%, 1%, 5%, and 10% (by dry weight). The physicochemical and geotechnical properties of Pb-contaminated soil treated by nZVI were analyzed. The results indicate that the contamination of Pb(II) resulted in a notable reduction in the undrained shear strength of soil from 16.85 kPa to 7.25 kPa. As expected, the Pb in exchangeable and carbonate-bound fractions decreased significantly with the increasing doses of nZVI. Meanwhile, the undrained shear strength of Pb-contaminated soil enhanced substantially as the increase of nZVI, from 25.83 kPa (0.2% nZVI treatment) to 69.33 kPa (10% nZVI treatment). An abundance of bubbles, generated from the oxidation of nZVI, was recorded. The mechanisms for simultaneous stabilization of Pb and soil improvement primarily include: 1) the precipitation and transformation of Pb-/Fe-hydrated oxides on the soil particles and their induced bounding effects; 2) the increased drainage capability of soil as the occupation of nZVI aggregates and bubbles in the macropores space and 3) the lower soil density derived from the increase in microbubbles retained in the soil. This study is provided to facilitate the application of nZVI in the redevelopment of contaminated soil.
Item Type: | Journal Article | ||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Subjects: | T Technology > TD Environmental technology. Sanitary engineering | ||||||||||||||||||
Divisions: | Faculty of Science, Engineering and Medicine > Engineering > Engineering | ||||||||||||||||||
Library of Congress Subject Headings (LCSH): | Soils -- Lead content, Soil pollution, Nanoparticles | ||||||||||||||||||
Journal or Publication Title: | Science of The Total Environment | ||||||||||||||||||
Publisher: | Elsevier Science BV | ||||||||||||||||||
ISSN: | 0048-9697 | ||||||||||||||||||
Official Date: | 15 February 2019 | ||||||||||||||||||
Dates: |
|
||||||||||||||||||
Volume: | 651 | ||||||||||||||||||
Number: | Part 1 | ||||||||||||||||||
Page Range: | pp. 877-884 | ||||||||||||||||||
DOI: | 10.1016/j.scitotenv.2018.09.146 | ||||||||||||||||||
Status: | Peer Reviewed | ||||||||||||||||||
Publication Status: | Published | ||||||||||||||||||
Access rights to Published version: | Restricted or Subscription Access | ||||||||||||||||||
Date of first compliant deposit: | 18 September 2018 | ||||||||||||||||||
Date of first compliant Open Access: | 12 September 2019 | ||||||||||||||||||
RIOXX Funder/Project Grant: |
|
Request changes or add full text files to a record
Repository staff actions (login required)
View Item |
Downloads
Downloads per month over past year