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
成就伟祺关注了科研通微信公众号
1秒前
能干的语芙完成签到 ,获得积分10
1秒前
无欲无求傻傻完成签到,获得积分10
1秒前
1秒前
1秒前
尊敬寒松完成签到 ,获得积分10
1秒前
糊涂的麦片完成签到,获得积分10
1秒前
2秒前
2秒前
3秒前
wanci应助wangdafa采纳,获得10
3秒前
竹子co完成签到,获得积分10
3秒前
steventj完成签到,获得积分10
3秒前
yz完成签到 ,获得积分10
4秒前
朴实山兰完成签到,获得积分10
5秒前
tkkdy发布了新的文献求助10
5秒前
蓁蓁发布了新的文献求助10
5秒前
醉熏的鑫发布了新的文献求助10
6秒前
独家双层汉堡完成签到,获得积分10
6秒前
Li完成签到,获得积分10
7秒前
xcx发布了新的文献求助10
7秒前
江小小发布了新的文献求助10
8秒前
8秒前
乐乐乐乐乐乐应助大橙子采纳,获得10
8秒前
伍六七完成签到,获得积分10
9秒前
shinen发布了新的文献求助10
9秒前
文艺的又亦完成签到,获得积分10
9秒前
小蘑菇应助妍儿采纳,获得10
10秒前
11秒前
义气天真完成签到,获得积分10
11秒前
满意易蓉发布了新的文献求助10
12秒前
12秒前
303完成签到 ,获得积分10
13秒前
海阔光明完成签到,获得积分10
13秒前
酷波er应助樾苒采纳,获得10
13秒前
Bingo完成签到,获得积分10
14秒前
hhhh完成签到 ,获得积分10
14秒前
小Q完成签到,获得积分10
15秒前
wangdafa发布了新的文献求助10
15秒前
wjq泉完成签到 ,获得积分20
16秒前
高分求助中
【提示信息,请勿应助】关于scihub 10000
Les Mantodea de Guyane: Insecta, Polyneoptera [The Mantids of French Guiana] 3000
徐淮辽南地区新元古代叠层石及生物地层 3000
The Mother of All Tableaux: Order, Equivalence, and Geometry in the Large-scale Structure of Optimality Theory 3000
Handbook of Industrial Diamonds第二卷 1200
Global Eyelash Assessment scale (GEA) 1000
Picture Books with Same-sex Parented Families: Unintentional Censorship 550
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 4038657
求助须知:如何正确求助?哪些是违规求助? 3576306
关于积分的说明 11375198
捐赠科研通 3306108
什么是DOI,文献DOI怎么找? 1819379
邀请新用户注册赠送积分活动 892698
科研通“疑难数据库(出版商)”最低求助积分说明 815066