Stabilization mechanism of arsenic in mine waste using basic oxygen furnace slag: The role of water contents on stabilization efficiency

熔渣(焊接) 碱性氧气炼钢 化学 吸附 砷酸盐 蒸馏水 废水 冶金 环境化学 废物管理 材料科学 环境工程 环境科学 炼钢 色谱法 工程类 有机化学
作者
Sang Hyun Kim,Seulki Jeong,Hye-Kyung Chung,Kyoungphile Nam
出处
期刊:Chemosphere [Elsevier BV]
卷期号:208: 916-921 被引量:15
标识
DOI:10.1016/j.chemosphere.2018.05.173
摘要

Arsenic stabilization mechanism in a mine waste was investigated using a basic oxygen furnace (BOF) slag. A lab-scale batch test was carried out to stabilize As in the mine waste samples for 1 h, where various amounts of the BOF slag and distilled water were introduced. Different stabilization efficiencies were observed depending on the stabilizing conditions (i.e., BOF slag content and water to mine waste (L/S) ratio). The stabilization efficiencies ranged 75–92% and 92–95% for 5% (w-slag/w-mine waste) and 10% BOF slag treated mine waste samples, respectively. Interestingly, a notable effect of the L/S ratio on the stabilization efficiency was observed (78% at 0.05 L/kg, and 23% at 1.0 L/kg) at the 3% BOF slag treatment. The point of zero charge and the stabilizing pH indicated that the BOF slag surface was negatively charged. Based on the comparison of fresh and Ca-reduced BOF slags, As stabilization mechanism was determined to be adsorption through cation bridges by Ca2+. The Surface analysis using X-ray photoelectron spectroscopy (XPS) and the stabilization experiment conducted at lower pH provided evidence that the hindrance of As adsorption resulted from Ca(OH)2 precipitation on the BOF slag surface when excess water (1.0 L/kg) was added. Such effect of water content seemed to be overcome by providing an excessive amount of the BOF slag. When an ample amount of Ca2+ is provided and pH is maintained around 11, not only As adsorption but also calcium arsenate precipitation occur, and both contributed to the stabilization mechanisms of As.
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
WUXIN完成签到,获得积分10
刚刚
1秒前
1秒前
Augustines完成签到,获得积分10
1秒前
FashionBoy应助科小浩采纳,获得10
2秒前
2秒前
大宇完成签到,获得积分10
3秒前
看风景悠然在路完成签到,获得积分10
3秒前
柒柒完成签到,获得积分10
4秒前
4秒前
小小郭完成签到 ,获得积分10
5秒前
5秒前
卑微学术人完成签到 ,获得积分10
5秒前
涣涣完成签到,获得积分10
6秒前
wanci应助1134采纳,获得10
6秒前
华仔应助仇湘采纳,获得10
7秒前
骑驴追火箭完成签到,获得积分10
7秒前
梁_发布了新的文献求助10
8秒前
能干的小笼包完成签到,获得积分10
8秒前
不吃橘子发布了新的文献求助10
8秒前
Miley发布了新的文献求助10
9秒前
蘑菇屋应助liuzengzhang666采纳,获得10
9秒前
9秒前
无敌的记号完成签到,获得积分10
11秒前
091完成签到 ,获得积分10
11秒前
bkagyin应助xuxu采纳,获得10
12秒前
ybyb完成签到,获得积分10
12秒前
CZY完成签到,获得积分10
12秒前
汉堡包应助zxh采纳,获得10
12秒前
12秒前
12秒前
13秒前
13秒前
ATTENTION完成签到,获得积分10
14秒前
Aqua发布了新的文献求助10
14秒前
vogo7发布了新的文献求助10
14秒前
小二郎应助密密麻麻蒙采纳,获得10
15秒前
15秒前
16秒前
wyp关注了科研通微信公众号
16秒前
高分求助中
【提示信息,请勿应助】关于scihub 10000
The Mother of All Tableaux: Order, Equivalence, and Geometry in the Large-scale Structure of Optimality Theory 3000
Social Research Methods (4th Edition) by Maggie Walter (2019) 2390
A new approach to the extrapolation of accelerated life test data 1000
北师大毕业论文 基于可调谐半导体激光吸收光谱技术泄漏气体检测系统的研究 390
Phylogenetic study of the order Polydesmida (Myriapoda: Diplopoda) 370
Robot-supported joining of reinforcement textiles with one-sided sewing heads 360
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 4009905
求助须知:如何正确求助?哪些是违规求助? 3549896
关于积分的说明 11304149
捐赠科研通 3284441
什么是DOI,文献DOI怎么找? 1810658
邀请新用户注册赠送积分活动 886424
科研通“疑难数据库(出版商)”最低求助积分说明 811406