Step-Wise Extraction of Metals from Dredged Marine Sediments

被引：5
|
作者：
Yoo, Jong-Chan [1 ]
Kim, Eun-Jung [1 ]
Yang, Jung-Seok [2 ]
Baek, Kitae [1 ,3 ]
机构：
[1] Chonbuk Natl Univ, Dept Environm Engn, Jeonju 561756, Jeollabuk Do, South Korea
[2] KIST Gangneung Inst, Kangnung, Gangwon Do, South Korea
[3] Chonbuk Natl Univ, Dept Bioact Mat Sci, Jeonju 561756, Jeollabuk Do, South Korea
来源：
SEPARATION SCIENCE AND TECHNOLOGY | 2015年 / 50卷 / 04期
关键词：
metal fractionation; risk assessment; marine sediment; step-wise metal extraction; ECOLOGICAL RISK-ASSESSMENT; SEQUENTIAL EXTRACTION; CONTAMINATED SOIL; HEAVY-METALS; HARBOR SEDIMENTS; REMEDIATION; ACID; EDTA; ZN; PB;
D O I：
10.1080/01496395.2014.956762
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
In this study, step-wise extraction using various extracting agents was carried out in order to enhance the removal of metals from contaminated dredged marine sediment. Five-times repeated extraction using HCl could extract approximately 23% of the As from the sediment, while NaOH extracted 14% of the As with a single extraction. An alternate application of EDTA and HCl extracted 17%, 34%, 9%, 87%, and 41% of the Cd, Cu, Ni, Pb, and Zn, respectively. Step-wise extraction reduced the risk index (RI) of heavy metals to 49% compared with untreated sediments, which were caused mainly from the decrease in the Cd concentration after chemical extraction in sediment.
引用
收藏
页码：536 / 544
页数：9
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