scholarly journals Jute: A Potential Candidate for Phytoremediation of Metals—A Review

Plants ◽  
2020 ◽  
Vol 9 (2) ◽  
pp. 258 ◽  
Author(s):  
Muhammad Hamzah Saleem ◽  
Shafaqat Ali ◽  
Muzammal Rehman ◽  
Mirza Hasanuzzaman ◽  
Muhammad Rizwan ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Chelating Agents ◽  
Morphological Characteristics ◽  
Leafy Vegetables ◽  
Toxic Substances ◽  
Potential Candidate ◽  
Toxic Heavy Metals ◽  
Corchorus Capsularis ◽  
Agricultural Regions

Jute (Corchorus capsularis) is a widely cultivated fibrous species with important physiological characteristics including biomass, a deep rooting system, and tolerance to metal stress. Furthermore, Corchorus species are indigenous leafy vegetables and show phytoremediation potential for different heavy metals. This species has been used for the phytoremediation of different toxic pollutants such as copper (Cu), cadmium (Cd), zinc (Zn), mercury (Hg) and lead (Pb). The current literature highlights the physiological and morphological characteristics of jute that are useful to achieve successful phytoremediation of different pollutants. The accumulation of these toxic heavy metals in agricultural regions initiates concerns regarding food safety and reductions in plant productivity and crop yield. We discuss some innovative approaches to increase jute phytoremediation using different chelating agents. There is a need to remediate soils contaminated with toxic substances, and phytoremediation is a cheap, effective, and in situ alternative, and jute can be used for this purpose.

Bioremediation of Heavy Metal Using Consortia Developed from Municipal Wastewater Isolates

2017 ◽  
Vol 9 (01) ◽  
pp. 57-66
Author(s):  
Kanhaiya Kumar Singh ◽  
R. C. Vaishya
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Municipal Wastewater ◽  
Environmental Problem ◽  
Morphological Characteristics ◽  
Toxic Substances ◽  
Toxic Heavy Metals ◽  
Physico Chemical ◽  
Chemical Techniques ◽  
Contaminated Area

Nowadays heavy-metal pollution has become an environmental problem due to their toxic effects, and their invasion in to the food chain leads to serious environmental and health problems. Heavy Metal degradation through common physico-chemical techniques is very expensive and unsuitable in treating large contaminated area effectively. Bioremediation provides a promising means to reclaim such toxic substances in an economical and ecofriendly way. Bioremediation obtains microorganisms that capable to degrade toxic contaminants or have the ability to accumulate it in their cells. The present study was carried out to evaluate degradation capacity of consortia developed from municipal wastewater isolates. The activity of the isolates for hemolysis was studied on the Blood-Agar plates. The identification of isolates obtained through biochemical and morphological characteristics. Seven isolates and three defined consortia were tested for degradation of heavy metals (zinc, lead and chromium). Consortia 3 (R9 + S11 + T12) showed better degradation with 93.78% ability in reducing zinc when incubated for 72 hours and 86.16% when incubated for 24 hours. The lead reduction was found to be 84.33% by Consortia 1(A3 + B4) when incubated at 37°C for 72 hours incubation. The chromium was reduced by Consortia 2(C6 + D7) with 87.61% ability when incubated for 72 hours. The organisms had capacity to reduce the heavy metals depending on the factors like time and concentration of inoculum. As the time of incubation increases, more reduction was observed. This study gives us insight in to the inherent potential of the Consortia to bio remediate toxic heavy metals.

Removal of Heavy Metals by Poly(Vinyl Pyrrolidone)/Laponite Nanocomposite Hydrogels

2013 ◽  
Vol 631-632 ◽  
pp. 291-297
Author(s):  
Yan Ming Wang ◽  
Da Ji Shang ◽  
Zhong Wei Niu
Keyword(s):  
Heavy Metals ◽  
Freeze Drying ◽  
In Situ Polymerization ◽  
Ion Concentration ◽  
Vinyl Pyrrolidone ◽  
Potential Candidate ◽  
Nanocomposite Hydrogels ◽  
Removal Of Heavy Metals ◽  
Poly Vinyl Pyrrolidone

Laponite cross-linked poly(vinyl pyrrolidone) (PVP) hydrogels were fabricated by in situ polymerization of vinyl pyrrolidone (NVP). Macroporous PVP/Laponite nanocomposite hydrogels were obtained by freeze drying of hydrogels, which exhibited faster adsorption kinetics than ambient-dried ones. We also investigated the influence of laponite content, initial ion concentration and pH of the solution on the adsorption capacity of PVP/Laponite hydrogels. Moreover, the PVP/Lapnoite hydrogels can further be fabricated into powder hydrogel samples, which can be used as a potential candidate of adsorbent for removal of heavy metals in water.

scholarly journals Advances in Heavy Metal Bioremediation: An Overview

2021 ◽  
Vol 2021 ◽  
pp. 1-8
Author(s):  
Ali Sayqal ◽  
Omar B. Ahmed
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Heavy Metal Contamination ◽  
Ex Situ ◽  
Toxic Heavy Metals ◽  
Heavy Metal Remediation ◽  
Land Farming ◽  
Biological Methods ◽  
Metal Bioremediation

The pollution of toxic heavy metals is considered one of the most important environmental issues which has accelerated dramatically due to changing industrial activities. This review focuses on the most common methods, strategies, and biological approaches of heavy metal bioremediation. Also, it provides a general overview of the role of microorganisms in the bioremediation of heavy metals in polluted environments. Advanced methods of heavy metal remediation include physicochemical and biological methods; the latter can be further classified into in situ and ex situ bioremediation. The in situ process includes bioventing, biosparging, biostimulation, bioaugmentation, and phytoremediation. Ex situ bioremediation includes land farming, composting, biopiles, and bioreactors. Bioremediation uses naturally occurring microorganisms such as Pseudomonas, Sphingomonas, Rhodococcus, Alcaligenes, and Mycobacterium. Generally, bioremediation is of very less effort, less labor intensive, cheap, ecofriendly, sustainable, and relatively easy to implement. Most of the disadvantages of bioremediation relate to the slowness and time-consumption; furthermore, the products of biodegradation sometimes become more toxic than the original compound. The performance evaluation of bioremediation might be difficult as it has no acceptable endpoint. There is a need for further studies to develop bioremediation technologies in order to find more biological solutions for bioremediation of heavy metal contamination from different environmental systems.

scholarly journals The Effects of Plasma-Activated Water on Heavy Metals Accumulation in Water Spinach

2021 ◽  
Vol 11 (11) ◽  
pp. 5304
Author(s):  
Chih-Yao Hou ◽  
Ting-Khai Kong ◽  
Chia-Min Lin ◽  
Hsiu-Ling Chen
Keyword(s):  
Heavy Metals ◽  
Plasma Treatment ◽  
Bioconcentration Factor ◽  
Product Yield ◽  
Leafy Vegetables ◽  
Plasma Technology ◽  
Toxic Heavy Metals ◽  
Water Spinach ◽  
Non Thermal Plasma ◽  
Plasma Activated Water

Toxic heavy metals accumulate in crops from the environment through different routes and may interfere with biochemical reactions in humans, causing serious health consequences. Plasma technology has been assessed for the promotion of seed germination and plant growth in several past studies. Therefore, the aim of the present study was to evaluate whether the growth rate of plants can be increased with the application of non-thermal plasma, as well as to reduce the accumulation of heavy metals in leafy vegetables (water spinach). In this study, several kinds of plasma treatments were applied, such as treatment on the seeds (PTS + NTW), irrigation water (NTS + PAW) or both (PTS + PAW). The results of the study showed that the heavy metals accumulated in water spinach were affected by the heavy metals available in the soil. The bioconcentration factor (BCF) of Cd in water spinach decreased from 0.864 to 0.543 after plasma treatment in seed or irrigating water, while the BCF of Pb was low and did not show any significant changes. Therefore, the results suggest that plasma treatment may suppress Cd absorption, but not for Pb. In this study, plasma treatment did not help to improve the product yield of water spinach planted in Cd-added soil. In the future, fertilizers can be used to supply nutrients that are not provided by plasma-activated water to support the growth of water spinach.

Dithiocarbamate chelating agents for toxic heavy metals

1980 ◽  
Vol 42 (5) ◽  
pp. 775-778 ◽  
Author(s):  
Mark M. Jones ◽  
Leo T. Burka ◽  
Martha E. Hunter ◽  
Mark Basinger ◽  
Gerry Campo ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Chelating Agents ◽  
Toxic Heavy Metals

scholarly journals Layered Double Hydroxides as Effective Adsorbents for U(VI) and Toxic Heavy Metals Removal from Aqueous Media

2013 ◽  
Vol 2013 ◽  
pp. 1-9 ◽  
Author(s):  
G. N. Pshinko
Keyword(s):  
Heavy Metals ◽  
Layered Double Hydroxides ◽  
Chelating Agents ◽  
Ethylenediaminetetraacetic Acid ◽  
Aqueous Media ◽  
Water Soluble ◽  
Toxic Heavy Metals ◽  
Metals Removal ◽  
The Stability ◽  
Double Hydroxides

Capacities of different synthesized Zn,Al-hydrotalcite-like adsorbents, including the initial carbonate [Zn4Al2(OH)12]·CO3·8H2O and its forms intercalated with chelating agents (ethylenediaminetetraacetic acid (EDTA), diethylenetriaminepentaacetic acid (DTPA), and hexamethylenediaminetetraacetic acid (HMDTA)) and heat-treated form Zn4Al2O7, to adsorb uranium(VI) and ions of toxic heavy metals have been compared. Metal sorption capacities of hydrotalcite-like adsorbents have been shown to correlate with the stability of their complexes with the mentioned chelating agents in a solution. The synthesized layered double hydroxides (LDHs) containing chelating agents in the interlayer space are rather efficient for sorption purification of aqueous media free from U(VI) irrespective of its forms of natural abundance (including water-soluble bi- and tricarbonate forms) and from heavy metal ions. [Zn4Al2(OH)12]·EDTA·nH2O is recommended for practical application as one of the most efficient and inexpensive synthetic adsorbents designed for recovery of both cationic and particularly important anionic forms of U(VI) and other heavy metals from aqueous media. Carbonate forms of LDHs turned out to be most efficient for recovery of Cu(II) from aqueous media withpH0≥7owing to precipitation of Cu(II) basic carbonates and Cu(II) hydroxides. Chromate ions are efficiently adsorbed from water only by calcinated forms of LDHs.

Heavy metal displacement in EDTA-assisted phytoremediation of biosolids soil

2006 ◽  
Vol 54 (5) ◽  
pp. 147-153 ◽  
Author(s):  
M.S. Liphadzi ◽  
M.B. Kirkham
Keyword(s):  
Heavy Metals ◽  
Drinking Water ◽  
Chelating Agents ◽  
Chelating Agent ◽  
Drainage Water ◽  
Soil Drainage ◽  
Toxic Heavy Metals ◽  
Drinking Water Standards ◽  
Assisted Phytoremediation ◽  
Poplar Seedlings

Chelating agents are added to soil to solubilise the metals for enhanced phytoextraction. Yet no studies follow the displacement and leaching of heavy metals in soil with biosolids following solubilisation with chelates. The objective of this work was to determine the mobility of heavy metals in biosolids in a soil from a sludge farm that had received biosolids for 25 years. The soil was placed in columns in a greenhouse. Columns either had a plant (poplar) or no plant. After the poplar seedlings had grown for 144 d, the tetrasodium salt of the chelating agent EDTA was irrigated onto the surface of the soil at a rate of 1 g per kg of soil. Drainage water was analysed for three toxic heavy metals and four essential heavy metals. Without EDTA, concentrations of the seven heavy metals in the leachate from columns with or without plants were low or below detection limits. With or without plants, the EDTA mobilised all heavy metals and increased their concentration in drainage water. Without plants, the concentrations of Cd, Cu, Fe, and Zn in the leachate from columns with EDTA were above drinking-water standards. The presence of poplar plants in the soil reduced the concentrations of Cu, Fe, and Zn in the leachate so it fell within drinking-water standards. Concentrations of Cd and Pb in the leachate remained above drinking-water standards with or without plants.

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