Dynamics of low-molecular-weight organic acids for the extraction and sequestration of arsenic species and heavy metals using mangrove sediments

Chemosphere ◽  
2021 ◽  
pp. 131820
Author(s):  
Kang Mei ◽  
Guirong Wu ◽  
Jingchun Liu ◽  
jiajia Wu ◽  
Hualong Hong ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Molecular Weight ◽  
Organic Acids ◽  
Arsenic Species ◽  
Low Molecular Weight ◽  
Mangrove Sediments

scholarly journals Organic acids effects on desorption of heavy metals from a contaminated soil

2006 ◽  
Vol 63 (3) ◽  
pp. 276-280 ◽  
Author(s):  
Clístenes Williams Araújo do Nascimento
Keyword(s):  
Heavy Metals ◽  
Molecular Weight ◽  
Citric Acid ◽  
Organic Acids ◽  
Low Molecular Weight ◽  
High Biomass ◽  
High Concentration ◽  
Accumulation Of Metals ◽  
Pb Concentration ◽  
Oxalic Acids

Phytoremediation of heavy metals is a biotechnology that extracts metals from soils and transfer them to plant. As hyperaccumulator species have demonstrated low potential for commercial phytoextraction, synthetic chelates have been successfully used to induce accumulation of metals by high-biomass plants. However, they pose serious environmental drawbacks regarding excessive amount of metals solubilized. In search for synthetic chelate-alternatives, this paper evaluate the performance of DTPA, EDTA, citric acid, oxalic acid, vanillic acid, and gallic acid in desorbing Cd, Pb, Zn, Cu, and Ni from soil. DTPA and EDTA were highly effective in desorbing Cd, Pb, Zn, Cu, and Ni from soil. However, the excessively high concentration of metals brought in solution by such chelates limits their application in the field. Citric and oxalic acids desorbed substantial quantities of Zn, Cu, and Ni if applied at 10 or 20 mmol kg-1. At the 20 mmol kg-1 dose, vanillic and gallic acids solubilized significant amounts of Zn, Ni, and Cd from soil. None of the tested low molecular weight organic acids substantially increased the Pb concentration in soil solution.

Degradation of low molecular weight organic acids complexed with heavy metals in soil

Geoderma ◽  
2004 ◽  
Vol 122 (2-4) ◽  
pp. 311-315 ◽  
Author(s):  
Giancarlo Renella ◽  
Loretta Landi ◽  
Paolo Nannipieri
Keyword(s):  
Heavy Metals ◽  
Molecular Weight ◽  
Organic Acids ◽  
Low Molecular Weight

scholarly journals Comparison of Low-Molecular-Weight Organic Acids and Ethylenediaminetetraacetic Acid to Enhance Phytoextraction of Heavy Metals by Maize

2014 ◽  
Vol 45 (1) ◽  
pp. 42-52 ◽  
Author(s):  
Muhammad Sabir ◽  
Mohamed Musa Hanafi ◽  
Muhammad Zia-Ur-Rehman ◽  
Saifullah ◽  
Hamaad Raza Ahmad ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Molecular Weight ◽  
Organic Acids ◽  
Ethylenediaminetetraacetic Acid ◽  
Low Molecular Weight
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