scholarly journals Decontamination of Automobile Workshop Soils containing Heavy Metals and PAHs using Chelating Agents

2020 ◽  
Author(s):  
Ayodele R. Ipeaiyeda ◽  
Afolarin O. Ogungbemi
Keyword(s):  
Heavy Metals ◽  
Chelating Agents

Effect of biodegradable chelating agents on heavy metals phytoextraction with Mirabilis jalapa and on its associated bacteria

2007 ◽  
Vol 43 (4) ◽  
pp. 200-206 ◽  
Author(s):  
Alessia Cao ◽  
Alessandra Carucci ◽  
Tiziana Lai ◽  
Paolo La Colla ◽  
Elena Tamburini
Keyword(s):  
Heavy Metals ◽  
Chelating Agents ◽  
Associated Bacteria ◽  
Mirabilis Jalapa

Effect of EDTA and EDDS on Phytoremediation of Pb- and Zn- Contaminated Soil by Brassica Juncea

2012 ◽  
Vol 518-523 ◽  
pp. 5040-5046 ◽  
Author(s):  
Li Di Gao ◽  
Naoki Kano ◽  
Yuichi Sato ◽  
Shuang Zhang ◽  
Hiroshi Imaizumi
Keyword(s):  
Heavy Metals ◽  
Control System ◽  
Plant Growth ◽  
Brassica Juncea ◽  
Contaminated Soil ◽  
Chelating Agents ◽  
Environmental Control ◽  
Chelating Agent ◽  
Whole Plant ◽  
Biomass Loss

Effect of EDTA and EDDS on phytoremediation of Pb- and Zn- contaminated soil by Brassica Juncea was investigated in this work. Especially, the effect of the kind and the method of adding chelating agent was investigated during the plant growth. Plants were grown in an environmental control system. The biomass of the whole plant was weighed, and the uptake of Pb and Zn in shoot and root were determined using ICP-AES. Consequently, the following matters have been obtained: (1) Both EDTA and EDDS significantly enhanced the translocation of metals (Pb and Zn) in soil from root to shoot. Furthermore, the two chelating agents resulted in a sharply biomass loss for more than 30% of the control. As a result, the total uptake amount of metals by Brassica Juncea was decreased (except the uptake of Pb with the addition of 3.0 mmol•kg-1 EDTA). (2) EDDS showed the higher inhibition for the growth of Brassica Juncea than EDTA. (3) The method for adding EDTA and EDDS at several times separately did not necessarily increase the uptake of heavy metals.

Newer Approaches in Phytoremediation

2021 ◽  
pp. 1785-1808
Author(s):  
Khushboo Chaudhary ◽  
Suphiya Khan ◽  
Pankaj Kumar Saraswat
Keyword(s):  
Heavy Metals ◽  
Plant Growth ◽  
Chelating Agents ◽  
Plant Growth Promoting Bacteria ◽  
Metals Removal ◽  
Pollution Problem ◽  
The World ◽  
Plant Growth Promoting ◽  
Growth Promoting

The heavy metal pollution problem is all over the world. Plant-growth-promoting bacteria (PGPB) has transformed heavy metals present in the soil, which removes and minimizes their toxic effects. This chapter highlights the role of plant-growth-promoting bacteria, chelating agents, and nanoparticles for remediation of heavy metals; their mechanism of action; and their applications approach of hyperaccumulation. Therefore, this chapter focuses on the mechanisms by which microorganisms, chelating agents, and nanoparticles can mobilize or immobilize metals in soils and the nano-phytoremediation strategies are addressed for the improvement of phytoextraction as an innovative process for enhancement of heavy metals removal from soil.

Recycling Bleach Technologies

1992 ◽  
Vol 266 ◽  
Author(s):  
James L. Minor
Keyword(s):  
Heavy Metals ◽  
Metal Content ◽  
Chelating Agents ◽  
Lignin Content ◽  
Sulfinic Acid ◽  
Factors Associated ◽  
Organic Chromophores ◽  
Environmental Attributes ◽  
Effective Removal ◽  
Recycled Fibers

AbstractWhen faced with bleaching recycled fibers, the technologist must consider the usual factors associated with the bleaching of virgin fibers plus additional factors introduced by recycling. The lignin content of the furnish and the products to be made determine whether delignifying or lignin-preserving agents are to be used. Factors introduced by recycling include mixed lignin contents, dyes, residual ink particles and carrier chemicals, contaminants, color reversion, and hornification (which affects accessibility of chromophores to bleaching reagents). In addition, the technologist must be concerned with the environmental impact of the bleaching operation.Dithionite and formamidine sulfinic acid are effective lignin-preserving reductive bleaching agents for recycled fibers. Hydrogen peroxide is an effective lignin-preserving oxidative agent, but heavy metals and enzymes catalyze its decomposition. Chelating agents have an important role in decreasing metal content. For some delignification and effective removal of organic chromophores, oxygen and ozone show promise. Research on the use of oxygen-based oxidative bleaching agents is intense because of their favorable environmental attributes.

Evaluating acids and chelating agents for removing heavy metals from contaminated soils

1997 ◽  
Vol 16 (4) ◽  
pp. 274-280 ◽  
Author(s):  
C. Nelson Neale ◽  
R. Y Bricka ◽  
Allen C. Chao
Keyword(s):  
Heavy Metals ◽  
Contaminated Soils ◽  
Chelating Agents

Some Interactions in Plants Among Cadmium, Other Heavy Metals, and Chelating Agents 1

1977 ◽  
Vol 69 (1) ◽  
pp. 18-20 ◽  
Author(s):  
A. Wallace ◽  
E. M. Romney ◽  
G. V. Alexander ◽  
S. M. Soufi ◽  
P. M. Patel
Keyword(s):  
Heavy Metals ◽  
Chelating Agents
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