Removal of Pb by EDTA-washing in the presence of hydrophobic organic contaminants or anionic surfactant

Journal of Hazardous Materials
Weihua ZhangIrene M C Lo

Abstract

Heavy metals and organic contaminants often coexist in contaminated soils, of which the remediation requires a combined or sequential use of surfactant and chelant in chemical-enhanced soil washing. This study investigated the Pb removal by EDTA-washing in the presence of the coexisting hydrophobic organic contaminants (marine diesel fuel, MDF) or anionic surfactant (sodium dodecyl sulfate, SDS). The results of batch experiments indicated a negative impact of MDF on Pb removal, whereas a positive or negative influence of SDS depending on the molar ratio of [EDTA]:[Pb]. The surface of MDF-contaminated soil was partially covered by free-phase MDF limiting the interaction between EDTA and sorbed Pb, especially at [EDTA]:[Pb]=1:1. Despite the ability of SDS itself for extracting Pb to some extent, probably through electrostatic interaction and dissolution of soil organic matter (SOM), the addition of SDS into EDTA solution only slightly enhanced Pb removal at [EDTA]:[Pb]=1:1 but inhibited at [EDTA]:[Pb]=2:1. This may be attributed to the SOM dissolution and the potential formation of ternary surface complexes, respectively. Along the same line of reasoning, it was not surprising that the optimal sequence for Pb removal was EDTA- fo...Continue Reading

References

Jun 24, 1999·Journal of Hazardous Materials·R W Peters
Nov 7, 1999·Journal of Colloid and Interface Science·J P FittsG A Parks
Mar 7, 2001·Water Research·W Chu, W S So
Mar 20, 2001·Journal of Colloid and Interface Science·John D. OstergrenGeorge A. Parks
Mar 20, 2001·Journal of Colloid and Interface Science·John D. OstergrenPer Persson
Jan 5, 2002·Water Research·Hervé Gallard, Gunten Urs von
Oct 22, 2003·Journal of Hazardous Materials·L Di PalmaF Biancifiori
Jan 14, 2004·Environmental Science & Technology·Yan GaoMason B Tomson
Feb 19, 2004·Environmental Science & Technology·Susan TandyBernd Nowack
Feb 28, 2004·Chemosphere·Carine SaisonMichel Schiavon
Mar 20, 2004·Environment International·Catherine N Mulligan, Raymond N Yong
May 13, 2004·Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering·Chun-Shu Lee, Ming-Muh Kao
Dec 29, 2004·Journal of Hazardous Materials·Amid P KhodadoustKranti Maturi
Aug 2, 2005·Environmental Science & Technology·Takumi SaitoSatoru Tanaka
Jun 1, 2006·Chemosphere·Yanzheng GaoJianming Xu

❮ Previous
Next ❯

Citations

Oct 1, 2013·Journal of Hazardous Materials·Tao ZhangRong-Liang Qiu
Jun 21, 2011·Journal of Hazardous Materials·Irene M C LoWeihua Zhang
Jun 29, 2011·Journal of Environmental Management·M A HashimBhaskar Sengupta
Sep 15, 2009·Journal of Hazardous Materials·Weihua ZhangRongliang Qiu
Aug 24, 2011·Journal of Environmental Monitoring : JEM·Maria del Carmen Hernández-SorianoM Dolores Mingorance
Nov 4, 2015·Environmental Science and Pollution Research International·Yue ChenOuping Deng
Nov 16, 2019·Bulletin of Environmental Contamination and Toxicology·Mingli JiangLiang Shi
Feb 18, 2019·Journal of Hazardous Materials·Dahu RuiYuzuru Ito

❮ Previous
Next ❯

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.