Alkaline Chemical Neutralization to Treat Acid Mine Drainage with High Concentrations of Iron and Manganese

酸性矿井排水 中和 环境化学 化学 环境科学 排水 病毒学 生态学 病毒 有机化学 生物
作者
Pingping Zhao,Ruiming Zhang,Mengdi Hu
出处
期刊:Water [Multidisciplinary Digital Publishing Institute]
卷期号:16 (6): 821-821 被引量:3
标识
DOI:10.3390/w16060821
摘要

Due to its high acidity and toxic metal content, acid mine drainage (AMD) needs to be properly treated before being discharged into the environment. This study took the AMD collected from one specific mine in China as a sample and investigated the treatment methodology for AMD. The water quality of the AMD was measured, and the sample was treated with caustic soda (NaOH) and shell powder (one kind of conventional neutralizer, mainly composed of CaCO3) by the neutralization method. The results show that the AMD has a relatively low pH (2.16) and contains high concentrations of Fe (77.54 g/L), Mn (621.29 mg/L), Cu (6.54 mg/L), Ca (12.39 mg/L), and Mg (55.04 mg/L). NaOH was an effective neutralizer to treat the AMD and performed much better than shell powder. Various metals were precipitated, in the order of Fe(III), Cu, Fe(II), Mn, Ca, and Mg. The metal removal mechanisms included precipitation, adsorption, and co-precipitation. The optimal reaction conditions were the reaction duration was selected as 5 min and the mass ratio of NaOH to AMD was 0.16:1 (w:v). By this stage, the pH rapidly increased from 2.16 to 8.53 during AMD-NaOH interactions and various metals were efficiently removed (from 86.71% to 99.99%) by NaOH. The residual mass concentrations of Fe, Mn, Cu, Ca, and Mg after the treatment were 1.52, 1.77, 0.10, 1.65, and 2.17 mg/L, respectively. These data revealed that NaOH was a good treatment regent for this kind of AMD, based on the discharge criteria of China (GB28661 2012). Also, the shell powder was a helpful neutralizer for pH adjustment and copper removal. This neutralization method has the advantages of convenient operation, high speed, good effect, simple equipment, and low infrastructure cost. In addition, the resulting neutralized residue is a valuable and high-quality raw material, which can be used in metal smelting and separation.
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
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
追寻麦片发布了新的文献求助10
4秒前
白白完成签到,获得积分10
5秒前
宝贝蛋完成签到,获得积分10
6秒前
enchanted完成签到 ,获得积分10
6秒前
人群是那么像羊群完成签到,获得积分10
7秒前
英姑应助YuhangFan采纳,获得10
7秒前
9秒前
机灵的幼菱完成签到 ,获得积分10
9秒前
科研通AI5应助李金纹采纳,获得10
10秒前
swetcol完成签到,获得积分10
10秒前
乐乐应助神奇的呃采纳,获得10
11秒前
卢鹏印完成签到,获得积分20
11秒前
迷人灵发布了新的文献求助30
15秒前
xu完成签到 ,获得积分10
15秒前
15秒前
悦耳静枫完成签到,获得积分10
17秒前
19秒前
19秒前
21秒前
Cing完成签到 ,获得积分10
22秒前
whisper完成签到,获得积分10
24秒前
zhongzz发布了新的文献求助10
24秒前
一一发布了新的文献求助10
24秒前
Alison发布了新的文献求助10
27秒前
30秒前
35秒前
35秒前
打牙祭应助小凯采纳,获得10
36秒前
37秒前
39秒前
SamXia发布了新的文献求助10
39秒前
40秒前
42秒前
等待的茉莉完成签到 ,获得积分10
43秒前
NexusExplorer应助wes采纳,获得10
43秒前
Zzz发布了新的文献求助10
43秒前
44秒前
44秒前
科研通AI5应助yangyang采纳,获得10
45秒前
夏天发布了新的文献求助10
45秒前
高分求助中
All the Birds of the World 4000
Production Logging: Theoretical and Interpretive Elements 3000
Les Mantodea de Guyane Insecta, Polyneoptera 2000
Am Rande der Geschichte : mein Leben in China / Ruth Weiss 1500
CENTRAL BOOKS: A BRIEF HISTORY 1939 TO 1999 by Dave Cope 1000
Machine Learning Methods in Geoscience 1000
Resilience of a Nation: A History of the Military in Rwanda 888
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 物理 生物化学 纳米技术 计算机科学 化学工程 内科学 复合材料 物理化学 电极 遗传学 量子力学 基因 冶金 催化作用
热门帖子
关注 科研通微信公众号,转发送积分 3738341
求助须知:如何正确求助?哪些是违规求助? 3281845
关于积分的说明 10026652
捐赠科研通 2998667
什么是DOI,文献DOI怎么找? 1645324
邀请新用户注册赠送积分活动 782749
科研通“疑难数据库(出版商)”最低求助积分说明 749901