Stabilization of arsenic and antimony Co-contaminated soil with an iron-based stabilizer: Assessment of strength, leaching and hydraulic properties and immobilization mechanisms

赤铁矿 土壤水分 化学 扫描电子显微镜 铁酸盐 浸出(土壤学) 环境化学 方解石 土壤污染 抗压强度 吸附 核化学 矿物学 无机化学 材料科学 地质学 土壤科学 复合材料 有机化学
作者
Shi-Ji Zhou,Yan‐Jun Du,Ya-Song Feng,Huiyan Sun,Weiyi Xia,Hang Yuan
出处
期刊:Chemosphere [Elsevier BV]
卷期号:301: 134644-134644 被引量:34
标识
DOI:10.1016/j.chemosphere.2022.134644
摘要

Soils with relatively high concentrations of arsenic (As) and antimony (Sb) in mining areas would impose significant risks to human health and ecosystem. A new stabilizer PFSC composed of polymerized ferric sulfate (PFS) and calcium hydroxide (Ca(OH)2) is proposed to stabilize the soil with co-existed As and Sb sampled at an abandoned arsenic factory site. The effects of stabilizer dosage on the properties of the stabilized soil including leached concentrations of As and Sb, unconfined compressive strength (UCS), and hydraulic conductivity (kw) were investigated. The mechanisms of As and Sb immobilization in the soils were interpreted by Tessier's sequential extraction procedure (SEP), scanning electron microscope (SEM), and X-ray diffraction (XRD) results. The results showed increasing PFSC dosage was effective for reducing leached concentrations of As and Sb. When the PFSC dosage increased from 2% to 10%, the UCS and kw increased from 84 to 206 kPa and decreased from 6.48 × 10-8 to 6.33 × 10-9 m s-1, respectively. Tessier's SEP results showed that the leachable As and Sb fractions decreased from 12% to 5.6% and 7.5% to 3.8%, while the Fe-Mn oxides bound fractions increased from 22.3% to 29.4% and 13.2% to 19.5%. The SEM images and XRD patterns of untreated and PFSC stabilized contaminated soils indicated that hematite and calcite (CaCO3) were the main products of PFSC stabilization processes. Adsorption on ferrihydrite, entrapment in hematite lattices, and co-precipitate with calcite might were the main mechanisms of As and Sb immobilization.
最长约 10秒,即可获得该文献文件

科研通智能强力驱动
Strongly Powered by AbleSci AI
更新
PDF的下载单位、IP信息已删除 (2025-6-4)

科研通是完全免费的文献互助平台,具备全网最快的应助速度,最高的求助完成率。 对每一个文献求助,科研通都将尽心尽力,给求助人一个满意的交代。
实时播报
刚刚
xigua完成签到,获得积分10
刚刚
1秒前
cdragon完成签到,获得积分10
2秒前
TX发布了新的文献求助10
2秒前
李某月发布了新的文献求助10
2秒前
大大大漂亮完成签到 ,获得积分10
2秒前
2秒前
小白研发布了新的文献求助10
2秒前
yhy完成签到,获得积分10
3秒前
君莫笑完成签到,获得积分10
3秒前
4秒前
Jolene完成签到 ,获得积分10
4秒前
吾系渣渣辉完成签到 ,获得积分10
4秒前
yang完成签到,获得积分10
4秒前
共享精神应助Camellia采纳,获得10
6秒前
夏夜完成签到 ,获得积分10
6秒前
子卿发布了新的文献求助10
6秒前
sci来完成签到,获得积分10
6秒前
zkai完成签到,获得积分10
6秒前
机智的皮皮虾完成签到,获得积分10
6秒前
7秒前
研友_851KE8发布了新的文献求助10
7秒前
7秒前
二大爷发布了新的文献求助10
8秒前
Tony完成签到,获得积分10
8秒前
大气的玉米完成签到,获得积分10
8秒前
siyan156完成签到,获得积分10
8秒前
9秒前
又又完成签到 ,获得积分10
9秒前
地方吧发布了新的文献求助10
9秒前
大个应助SInyi采纳,获得10
9秒前
越野发布了新的文献求助30
9秒前
共享精神应助Yanan采纳,获得10
9秒前
香蕉静芙完成签到,获得积分10
10秒前
ztl17523发布了新的文献求助10
10秒前
生而追梦不止完成签到 ,获得积分10
10秒前
10秒前
混沌完成签到,获得积分10
10秒前
11秒前
高分求助中
A new approach to the extrapolation of accelerated life test data 1000
Cognitive Neuroscience: The Biology of the Mind 1000
Technical Brochure TB 814: LPIT applications in HV gas insulated switchgear 1000
Immigrant Incorporation in East Asian Democracies 600
Nucleophilic substitution in azasydnone-modified dinitroanisoles 500
不知道标题是什么 500
A Preliminary Study on Correlation Between Independent Components of Facial Thermal Images and Subjective Assessment of Chronic Stress 500
热门求助领域 (近24小时)
化学 材料科学 医学 生物 工程类 有机化学 生物化学 物理 内科学 纳米技术 计算机科学 化学工程 复合材料 遗传学 基因 物理化学 催化作用 冶金 细胞生物学 免疫学
热门帖子
关注 科研通微信公众号,转发送积分 3968771
求助须知:如何正确求助?哪些是违规求助? 3513729
关于积分的说明 11169450
捐赠科研通 3249084
什么是DOI,文献DOI怎么找? 1794592
邀请新用户注册赠送积分活动 875258
科研通“疑难数据库(出版商)”最低求助积分说明 804740