Effect of phosphorus on the properties of phosphogypsum-based cemented backfill

磷石膏 磷酸盐 渗滤液 磷矿 骨料(复合) 化学 材料科学 环境化学 冶金 复合材料 有机化学 原材料
作者
Shitong Zhou,Xibing Li,Yanan Zhou,Chendi Min,Ying Shi
出处
期刊:Journal of Hazardous Materials [Elsevier]
卷期号:399: 122993-122993 被引量:52
标识
DOI:10.1016/j.jhazmat.2020.122993
摘要

When phosphogypsum (PG) is used as an aggregate for backfill, phosphate in the PG might influence the hydration process and escape into the environment. The current study aimed to understand phosphate dynamics during the PG-based backfilling process by adding different amounts and types of phosphates (H3PO4, KH2PO4, K3PO4, and Ca3(PO4)2). The results indicate that the majority of the phosphate was first immobilized by PG depending on the types, and the residual dissolved phosphate (RDP) could be further stabilized/solidified (S/S) in the backfill via the hydration process. However, increasing RDP content lowered unconfined compressive strength of the backfill, attributing to the suppression of the hydration process and a loosened backfill structure. Furthermore, the environmental behavior of phosphate was studied by measuring dissolved phosphate in bleeding water and leachate. For bleeding water, a high RDP content might lead to the phosphate concentration exceeding the national standard limit (GB 8978-1996) depending on the phosphate types, and it was recommended that the RDP content should be controlled or converted to Ca3(PO4)2 or K3PO4 before PG inclusion into in the backfill. For leachate, the phosphate concentration was always below the standard limit, indicating that the cemented backfill ensured long-term S/S of the phosphate.
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
大幅提高文件上传限制,最高150M (2024-4-1)

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
mrcz完成签到 ,获得积分10
2秒前
彪壮的小玉完成签到,获得积分10
4秒前
Qianyu发布了新的文献求助150
4秒前
852应助寒雪采纳,获得10
7秒前
8秒前
11秒前
12秒前
万能图书馆应助醉熏的井采纳,获得10
13秒前
14秒前
柳柳完成签到,获得积分10
15秒前
carm小蛋黄发布了新的文献求助10
16秒前
摸鱼鱼完成签到,获得积分10
16秒前
19秒前
22秒前
乐乐应助大大耳朵采纳,获得10
22秒前
田様应助伤心小肥子采纳,获得10
23秒前
24秒前
CodeCraft应助carm小蛋黄采纳,获得10
25秒前
慕青应助陈杨采纳,获得10
26秒前
26秒前
ffffffflzx666发布了新的文献求助10
26秒前
晴空万里发布了新的文献求助10
27秒前
28秒前
28秒前
jialin完成签到 ,获得积分10
29秒前
脑洞疼应助努力独行者采纳,获得30
31秒前
听说发布了新的文献求助10
32秒前
醉熏的井发布了新的文献求助10
34秒前
神勇的小小完成签到 ,获得积分10
37秒前
咕噜完成签到 ,获得积分10
38秒前
39秒前
cc发布了新的文献求助10
40秒前
勤奋的芷荷完成签到,获得积分10
43秒前
激动的水壶完成签到,获得积分10
43秒前
科研通AI2S应助科研通管家采纳,获得10
44秒前
44秒前
充电宝应助科研通管家采纳,获得10
44秒前
科研通AI2S应助科研通管家采纳,获得10
44秒前
科研通AI2S应助科研通管家采纳,获得10
44秒前
44秒前
高分求助中
Evolution 10000
Becoming: An Introduction to Jung's Concept of Individuation 600
Ore genesis in the Zambian Copperbelt with particular reference to the northern sector of the Chambishi basin 500
A new species of Coccus (Homoptera: Coccoidea) from Malawi 500
A new species of Velataspis (Hemiptera Coccoidea Diaspididae) from tea in Assam 500
PraxisRatgeber: Mantiden: Faszinierende Lauerjäger 500
The Kinetic Nitration and Basicity of 1,2,4-Triazol-5-ones 440
热门求助领域 (近24小时)
化学 医学 生物 材料科学 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 基因 遗传学 催化作用 物理化学 免疫学 量子力学 细胞生物学
热门帖子
关注 科研通微信公众号,转发送积分 3164190
求助须知:如何正确求助?哪些是违规求助? 2814916
关于积分的说明 7906988
捐赠科研通 2474500
什么是DOI,文献DOI怎么找? 1317533
科研通“疑难数据库(出版商)”最低求助积分说明 631857
版权声明 602228