Fractionation of heavy metals in sewage sludge and their removal using low-molecular-weight organic acids

2012 ◽  
Vol 21 (3) ◽  
pp. 189-198 ◽  
Author(s):  
Ernestas Zaleckas ◽  
Valdas Paulauskas ◽  
Eglė Sendžikienė
Keyword(s):  
Heavy Metals ◽  
Molecular Weight ◽  
Sewage Sludge ◽  
Organic Acids ◽  
Low Molecular Weight

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 The role of low molecular weight organic acids in the release of phosphorus from sewage sludge-based biochar

All Life ◽  
2021 ◽  
Vol 14 (1) ◽  
pp. 599-609
Author(s):  
Chandra Sekhar Paul ◽  
Filip Mercl ◽  
Jiřina Száková ◽  
Václav Tejnecký ◽  
Pavel Tlustoš
Keyword(s):  
Molecular Weight ◽  
Sewage Sludge ◽  
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

scholarly journals COPPER MOBILITY IN SOILS AS AFFECTED BY SEWAGE SLUDGE AND LOW MOLECULAR WEIGHT ORGANIC ACIDS

Soil Science ◽  
2006 ◽  
Vol 171 (1) ◽  
pp. 29-38 ◽  
Author(s):  
L. Bahaminyakamwe ◽  
J. Simunek ◽  
J. H. Dane ◽  
J. F. Adams ◽  
J. W. Odom
Keyword(s):  
Molecular Weight ◽  
Sewage Sludge ◽  
Organic Acids ◽  
Low Molecular Weight
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