Multi‐Isotope Based Identification and Quantification of Oxygen Consuming Processes in Uranium Hosting Aquifers With CO2 + O2 In Situ Leaching

黄铁矿 含水层 碳酸盐 浸出(土壤学) 溶解 地下水 尾矿 环境化学 地球化学模拟 碳酸盐矿物 地质学 矿物学 地球化学 化学 土壤科学 冶金 土壤水分 材料科学 岩土工程 有机化学 物理化学
作者
Chongsheng Lu,Wei Xiu,Huaming Guo,Guoxi Lian,Bing Yang,Tianjing Zhang,Erping Bi,Zheming Shi
出处
期刊:Water Resources Research [Wiley]
卷期号:59 (3) 被引量:8
标识
DOI:10.1029/2022wr033980
摘要

Abstract Although neutral in situ leaching through CO 2 + O 2 is employed to extract uranium (U) in sandstone by in situ leaching (ISL), mechanisms of U mobilization and O 2 consumption remained unclear. To address this gap, 18 groundwater samples were taken from the Qianjiadian sandstone U ore field, including seven samples from production wells in mining area M1 (mining for 5 years), six samples from production wells in mining area M2 (mining for 4 years), and five samples from monitoring wells (GC), to quantify U‐mobilizing processes in the mining aquifer by employing hydrogeochemical compositions and multi‐isotopes. The introduction of O 2 and CO 2 efficiently stimulated U mobilization in the mining aquifer. The injected CO 2 critically promoted the dissolution of carbonate minerals, which enhanced the formation of uranyl carbonate (predominantly CaUO 2 (CO 3 ) 2 2− and Ca 2 UO 2 (CO 3 ) 3 (aq)) and thus facilitated U mobility. Generally, δ 34 S SO4 and δ 18 O SO4 in M2 and M1 were significantly lower than those in GC ( p < 0.01). A Bayesian isotope mixing model of δ 34 S SO4 and δ 18 O SO4 showed that the contribution of pyrite oxidation to SO 4 2− concentration increased from 1.7% in GC to 13.6% in M2 and to 15.0% in M1. During ISL, pyrite, ammonium, and dissolved organic carbon were major compounds competing with U(IV) for introduced O 2 in the ore‐bearing aquifer. Most of the consumed O 2 was used for pyrite oxidation (56.2%) and U(IV) oxidation (39.3%), following the thermodynamic sequence of those redox reactions. The current results highlighted the significance of increasing O 2 utilization efficiency in improving the performance of ISL operations.
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
tsuipeng完成签到,获得积分10
刚刚
芋泥泥泥发布了新的文献求助10
刚刚
帕荣荣发布了新的文献求助10
刚刚
1秒前
蜂蜜罐头完成签到 ,获得积分10
1秒前
田様应助炙热怜寒采纳,获得30
2秒前
2秒前
小梦完成签到,获得积分10
3秒前
4秒前
武雨寒发布了新的文献求助10
5秒前
歪歪踢完成签到 ,获得积分10
5秒前
111发布了新的文献求助20
6秒前
声声慢发布了新的文献求助10
6秒前
炙热怜寒完成签到,获得积分10
7秒前
7秒前
Adzuki0812完成签到,获得积分10
7秒前
科目三应助澡雪采纳,获得10
8秒前
桐桐应助仁爱樱采纳,获得10
8秒前
不吃西瓜发布了新的文献求助10
8秒前
思源应助胖橘梨花逻辑猫采纳,获得10
9秒前
9秒前
李爱国应助啊啊啊啊采纳,获得10
9秒前
张海桐发布了新的文献求助10
10秒前
量子星尘发布了新的文献求助10
10秒前
科目三应助fc小肥杨采纳,获得10
11秒前
12秒前
li发布了新的文献求助50
13秒前
高高代萱发布了新的文献求助10
13秒前
风趣的老太应助15858833895采纳,获得10
13秒前
英俊的铭应助帕荣荣采纳,获得10
14秒前
14秒前
14秒前
汉堡包应助Yukangqian采纳,获得10
16秒前
心灵美从寒完成签到,获得积分10
16秒前
安澜发布了新的文献求助30
17秒前
17秒前
啊啊发布了新的文献求助10
17秒前
slby完成签到 ,获得积分10
18秒前
大力的寻琴完成签到,获得积分10
19秒前
21秒前
高分求助中
A new approach to the extrapolation of accelerated life test data 1000
Picture Books with Same-sex Parented Families: Unintentional Censorship 700
ACSM’s Guidelines for Exercise Testing and Prescription, 12th edition 500
Nucleophilic substitution in azasydnone-modified dinitroanisoles 500
不知道标题是什么 500
Indomethacinのヒトにおける経皮吸収 400
Effective Learning and Mental Wellbeing 400
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 3975871
求助须知:如何正确求助?哪些是违规求助? 3520207
关于积分的说明 11201502
捐赠科研通 3256611
什么是DOI,文献DOI怎么找? 1798403
邀请新用户注册赠送积分活动 877552
科研通“疑难数据库(出版商)”最低求助积分说明 806430