scholarly journals Remediation of Pb and Cd Polluted Soils with Fulvic Acid

Forests ◽  
2021 ◽  
Vol 12 (11) ◽  
pp. 1608
Author(s):  
Aslihan Esringü ◽  
Metin Turan ◽  
Asli Cangönül
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Fulvic Acid ◽  
Ornamental Plants ◽  
Polluted Soil ◽  
Green Technology ◽  
Zinnia Elegans ◽  
Fresh Weight ◽  
Polluted Soils ◽  
The World

Heavy metal pollution is among the important environmental problems in the world. Many techniques have already been used to remove the heavy metals such as lead (Pb) and cadmium (Cd). Among them, the phytoremediation method is an environmentally friendly and green technology. This study was carried out to determine the efficiency of fulvic acid (FA) application in removing Pb and Cd from polluted soil using Tagetes eracta L. and Zinnia elegans Jacq. ornamental plants. The results indicated that, FA application, number of flower per plants, and plant fresh weight of Tagetes eracta plants and Zinnia elegans plants increased 187.5%, 104.5% and 155.5%, 57.7%, respectively with application of 7000 mg L−1 FA at 100 mg kg−1 Pb pollution condition, whereas 42.85%, 16.5%, and 44.4–36.1% with application of 7000 mg L−1 FA at 30 mg kg±1 Cd pollution condition, respectively. With the FA application in the Zinnia elegans plant, the root part has accumulated 51.53% more Pb than the shoot part. For Cd, the shoot part accumulated 35.33% more Cd than the root. The effect of FA application on superoxide dismutase (SOD), peroxidase (POD) and, catalase (CAT) of the Tagetes eracta were decreased as 32.7%, 33.1%, and 35.1% for Pb, 21.2%, 25.1%, and 26,1%, for Cd, and 15.1%, 22.7%, and 37.7% for Pb, and 7.55%, 18.0%, and 18.8% for Cd were in Zinnia elegans respectively. In conclusion, Tagetes eracta and Zinnia elegans can not be recommended for remediation of Pb and Cd polluted area, but FA can be recommended for Pb and Cd stabilization in polluted soil.

scholarly journals Monitoring the Efficiency of Rhazya stricta L. Plants in Phytoremediation of Heavy Metal-Contaminated Soil

Plants ◽  
2020 ◽  
Vol 9 (9) ◽  
pp. 1057
Author(s):  
Ehab Azab ◽  
Ahmad K. Hegazy
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Contaminated Soil ◽  
Large Scale ◽  
Translocation Factor ◽  
Cost Effective ◽  
Polluted Soil ◽  
Green Technology ◽  
Polluted Soils ◽  
Rhazya Stricta

Heavy metal-contaminated soil constitutes many environmental concerns. The toxic nature of heavy metals poses serious threats to human health and the ecosystem. Decontamination of the polluted soil by phytoremediation is of fundamental importance. Vegetation is an appealing and cost-effective green technology for the large-scale phytoremediation of polluted soils. In this paper, a greenhouse experiment was carried out to test the potential of Rhazya stricta as a heavy metal phytoremediator in polluted soil. Plants were grown for three months in pots filled with soils treated with the heavy metals Cd, Pb, Cu, and Zn at rates of 10, 50, and 100 mg/kg. The bioaccumulation factor (BCF) and translocation factor (TF) were calculated to detect the ability of R. stricta to accumulate and transfer heavy metals from soil to plant organs. The results showed that under increasing levels of soil pollution, the bioconcentration of Cd and Zn heavy metals showed the highest values in plant roots followed by leaves, whereas in the case of Pb and Cu, roots showed the highest values followed by stems. Heavy metals accumulation was higher in roots than in stems and leaves. The BCF of Zn reached the highest values in roots and stems for 10 mg/kg soil treatment, followed by the BCFs of Cd, Cu, and Pb. The TF for the different heavy metal pollutants’ concentrations was less than unity, suggesting that the plants remediate pollutants by phytostabilization. The TF values ranged from higher to lower were in the order Zn > Cu > Cd > Pb. The rapid growth of R. stricta and its tolerance of heavy metals, as well as its ability to absorb and accumulate metals within the plant, recommends its use in the phytoremediation of slightly polluted soils in arid lands by limiting the heavy metals transport.

scholarly journals Assessing the level of heavy metals concentration in soil around transformer at Akoko community of OndoState, Nigeria

2021 ◽  
Vol 24 (12) ◽  
pp. 2183-2189
Author(s):  
R. Ogunlana ◽  
A.I. Korode ◽  
Z.F. Ajibade
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Heavy Metal Concentration ◽  
World Health Organisation ◽  
Polluted Soil ◽  
Transformer Oil ◽  
World Health ◽  
Allowable Limit ◽  
The World ◽  
Ondo State

Some heavy metals have bio-importance as trace elements but the bio-toxic effects of many of them in human biochemistry are of great concern. The level of heavy metals concentrations of transformer oil polluted soil was assessed in Akungba Akoko community of Ondo State, Nigeria using Atomic Absorption Spectrophotometer. The concentration of heavy metals investigated ranges from: Cu (1400-18)mg/kg, Fe (96700- 15500)mg/kg, Cd (2- 0.5)mg/kg, Mn (62-29)kg/mg, Ni(5-1)mg/kg, Al(27-11)mg/kg, Zn(1400- 44)mg/kg, Pd (68-20)mg/kg and Ca (570- 135)mg/kg. From the study, it was observed that some transformer sites had more concentration of heavy metals than others, as a result of the heavy metals content of the transformer soil released to the surrounding soil, while in some samples of these heavy metals were absent or are below detection limit. Comparing the results with the World Health Organisation (W.H.O) maximum allowable limit in soil with results of the results of different samples collected, majority of the results were found to fall below W.H.O limit which implies that those sites are still contamination free with respect to the specific heavy metal and caution needs to be taken urgently to avoid potential contamination. Meanwhile, heavy metal concentration at some sites have gone beyond the W.H.O maximum allowable limit, calling for immediate remediation of the site.

Applications of Bentonite to Soil Decontamination

2018 ◽  
Vol 69 (7) ◽  
pp. 1695-1698
Author(s):  
Marin Rusanescu ◽  
Carmen Otilia Rusanescu ◽  
Gheorghe Voicu ◽  
Mihaela Begea
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Laboratory Experiments ◽  
Experimental Studies ◽  
Heavy Metal Concentration ◽  
Polluted Soil ◽  
Raw Material ◽  
Soil Decontamination ◽  
Metal Retention ◽  
Removal Of Heavy Metals

A calcium bentonite from Orasu Nou deposit (Satu Mare Romania) was used as raw material. We have conducted laboratory experiments to determine the influence of bentonite on the degree of heavy metal retention. It has been observed that the rate of retention increases as the heavy metal concentration decreases. Experimental studies have been carried out on metal retention ( Zn) in bentonite. In this paper, we realized laboratory experiments for determining the influence of metal (Zn) on the growth and development of two types of plants (Pelargonium domesticum and Kalanchoe) and the effect of bentonite on the absorption of pollutants. These flowers were planted in unpolluted soil, in heavy metal polluted soil and in heavy metal polluted soil to which bentonite was added to observe the positive effect of bentonite. It has been noticed that the flowers planted in unpolluted soil and polluted with heavy metals to which bentonite has been added, the flowers have flourished, the leaves are still green and the plants whose soils have been polluted with heavy metals began to dry after 6 days, three weeks have yellowish leaves and flowers have dried. Experiments have demonstrated the essential role of bentonite for the removal of heavy metals polluted soil.

scholarly journals Heavy Metal Tolerance Bacillus spp Isolated From Crude Oil Polluted Soil

2020 ◽  
Vol 7 (1) ◽  
Author(s):  
Muibat Fashola
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Crude Oil ◽  
Metal Tolerance ◽  
Heavy Metal Tolerance ◽  
Polluted Soil ◽  
Diffusion Method ◽  
Bacillus Species ◽  
Antibiotics Resistance ◽  
Bacillus Spp

Introduction: Indiscriminate dumping of spent oils enriched with heavy metals has led to increase in heavy metals load in the soil. Heavy metals exert toxic effects on biodegradation of organic pollutant in cocontaminated soil and there is need to find suitable strategies for their removal. Aim: The aim of this study was to assess the heavy metals resistance capability of indigenous Bacillus species in hydrocarbon polluted soil to nickel (Ni), Cadmium (Cd), Lead (Pb) and Chromium (Cr). Materials and Methods: Heavy metal tolerant bacteria were isolated from hydrocarbon polluted soil using Luria-Berthani agar supplemented with the respective metals and spread plate techniques. The isolates were putatively identified on the basis of their colonial morphology and biochemical characteristics and their antibiotics susceptibility pattern were evaluated using disc diffusion method. Results: The maximum tolerable concentration (MTC) of the four heavy metals to the selected isolates was 2 mM. Four bacteria isolates able to withstand the MTC were putatively identified as Bacillus subtilis, Bacillus megaterium, Bacillus laterosporus and Bacillus polymyxa. Out of the four Bacillus species, only B. laterosporus did not show multiple tolerance to the tested antibiotics which show that there is correlation between heavy metal tolerance and antibiotics resistance by the isolates. Conclusion: Multiple heavy metal tolerance Bacillus spp. were isolated from crude oil polluted soil. These bacteria could be suitable agents for bioaugmentation of hydrocarbon polluted soil co-contaminated with heavy metals.

scholarly journals Heavy Metal Tolerance and Antibiotic Resistance of Bacillus spp. Isolated from Two Major Rivers in Bangladesh

2016 ◽  
Vol 30 (1-2) ◽  
pp. 17-22 ◽  
Author(s):  
Tahmina Shammi ◽  
Sangita Ahmed
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Antibiotic Resistance ◽  
Biochemical Analysis ◽  
Metal Tolerance ◽  
Heavy Metal Tolerance ◽  
Drug Resistant ◽  
Toxic Heavy Metals ◽  
The World ◽  
Bacillus Spp

Pollution of the environment with toxic heavy metals is spreading throughout the world along with industrial progress. Removal of these toxic heavy metals by using bacteria has achieved growing attention in recent years. The present study focuses on isolation of lead and chromium tolerant Bacillus spp., from the Buriganga and the Shitalkhya, the two major rivers surrounding Dhaka. A total of 25 Bacillus spp. isolates tolerant to 50 ppm lead and chromium were preliminarily identified based on morphological and biochemical analysis. Further investigation revealed that all isolates were also able to grow at 1000 ppm lead and 400 ppm chromium, while tolerance to 1500 ppm lead and 500 ppm chromium was observed among 48% and 76% isolates, respectively. All isolates were also able to grow at 50 ppm copper and 50 ppm zinc, while 72% grew at 100 ppm copper. The heavy metal tolerant Bacillus spp were also multi drug resistant and showed resistance to Tetracycline (100%), Ceftazidime (100%), Ceftriaxone (100%), Ampicillin (28%) and Nalidixic acid (24%).Bangladesh J Microbiol, Volume 30, Number 1-2,June-Dec 2013, pp 17-22

scholarly journals Heavy Metal Polluted Soils: Effect on Plants and Bioremediation Methods

2014 ◽  
Vol 2014 ◽  
pp. 1-12 ◽  
Author(s):  
G. U. Chibuike ◽  
S. C. Obiora
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Growth Performance ◽  
Anthropogenic Activities ◽  
Polluted Soils

Soils polluted with heavy metals have become common across the globe due to increase in geologic and anthropogenic activities. Plants growing on these soils show a reduction in growth, performance, and yield. Bioremediation is an effective method of treating heavy metal polluted soils. It is a widely accepted method that is mostly carried outin situ; hence it is suitable for the establishment/reestablishment of crops on treated soils. Microorganisms and plants employ different mechanisms for the bioremediation of polluted soils. Using plants for the treatment of polluted soils is a more common approach in the bioremediation of heavy metal polluted soils. Combining both microorganisms and plants is an approach to bioremediation that ensures a more efficient clean-up of heavy metal polluted soils. However, success of this approach largely depends on the species of organisms involved in the process.

scholarly journals Heavy metal (As, Cd, Cr, Hg, Pb) analysis and identification of heavy metal resistant bacteria in sediments from Manado Bay

2021 ◽  
Vol 926 (1) ◽  
pp. 012096
Author(s):  
B J Kepel ◽  
W Bodhi ◽  
Fatimawali ◽  
T E Tallei
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Average Concentration ◽  
Resistant Bacteria ◽  
Icp Oes ◽  
Sediment Samples ◽  
Heavy Metal Concentrations ◽  
The World ◽  
Heavy Metal Resistant ◽  
16Srrna Gene

Abstract Environmental pollution from heavy metals is becoming a growing concern due to the adverse effects it is causing throughout the world. This study aims to analyze heavy metal concentrations and identify heavy metal resistant bacteria in the bay of Manado. Sediment samples were collected from five bays in Manado. The concentrations of heavy metals As, Cd, Cr, Hg and Pb were analyzed using ICP-OES, and Hg using CV-AFS. Bacteria from the sediment were grown in nutrient broth media containing heavy metals As, Cd, Cr, Hg and Pb respectively. Microbiology and 16SrRNA gene analysis were used to identify the bacteria that grown on media containing varying concentrations of heavy metals. The results showed that the sediments from the five bays in Manado contained heavy metals with an average concentration of As <1mg/kg, Cd 1.8mg/kg), Cr 6.2mg/kg, Hg <0.07mg/kg). and Pb 11.2mg/kg. The results of microbiological and molecular analysis showed that 5 species of heavy metal resistant bacteria were Pseudomonas aeruginosa, Bacillus cereus, Staphylococcus arlettae, Acinobacter sp., and Brevibacterium sp. The five bacteria found to be resistant to heavy metals can be used to detoxify As, Cd, Cr, Hg, and Pb.

scholarly journals Bio Remedial Potential for the Treatment of Contaminated Soils

2021 ◽  
Vol 2 (4) ◽  
pp. 53-58
Author(s):  
Hasnain Raza ◽  
Keyword(s):  
Heavy Metal ◽  
Contaminated Soil ◽  
Contaminated Soils ◽  
Anthropogenic Activities ◽  
Cost Effective ◽  
Polluted Soil ◽  
Soil Bioremediation ◽  
Environmental Threat ◽  
The World

As anthropogenic activities rise over the world, representing an environmental threat, soil contamination and treatment of polluted areas have become a worldwide concern. Bioremediation is a sustainable technique that could be a cost-effective mitigating solution for heavy metal-polluted soil regeneration. Due to the difficulties in determining the optimum bioremediation methodology for each type of pollutant and the lack of literature on soil bioremediation, we reviewed the main in-situ type, their current properties, applications, and techniques, plants, and microbe’s efficiency for treatment of contaminated soil. In this review, we describe the deeper knowledge of the in-situ types of bioremediation and their different pollutant accumulation mechanisms.

scholarly journals Effect of Chelator EDTA on Phyto-Remediation of Cadmium, Chromium and Lead and their Effect on Growth of Sunflower (Helianthus annuus L.)

2020 ◽  
Vol 63 (1) ◽  
pp. 22-29
Author(s):  
Jehan Bakht ◽  
Rafi Ullah ◽  
Mohammad Shafi
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Helianthus Annuus ◽  
Metal Accumulation ◽  
Dry Weight ◽  
Heavy Metal Accumulation ◽  
Fresh Weight ◽  
Shoot Fresh Weight ◽  
Helianthus Annuus L ◽  
Root Dry Weight

 The present study investigates the phyto-accumulation capacity of two cultivars of sunflower (Helianthus annuus L.) for heavy metals. Analysis of the data recorded ten weeks after sowing indicated that heavy metal application had significantly (p<0.05) affected all the parameters under study. Interaction of EDTA x cultivar and EDTA x cultivar x heavy metal had significantly (p<0.05) affected root fresh weight, root dry weight and heavy metal accumulation. EDTA application had significant (p<0.05) effect on heavy metal accumulation when data was noted ten weeks after sowing. The data also revealed that maximum plant height, number of leaves/plant, shoot fresh weight and dry weight, root fresh and dry weight was noted in control pots (0 mg/kg heavy metal). The suggested that maximum shoot fresh weight shoot dry weight, root fresh weight and root dry weight was noted in pots kept at control with San Sun-33 when applied with 5 mM EDTA. Similarly, maximum heavy metal accumulation was recorded in treatment sown of HiSun-33 applied with 5 mM EDTA and 50 mM chromium. Maximum root fresh weight was noted in control pots treated with 5 mM EDTA and planted with San Sun-33. Similarly, heavy metal accumulation was more in HiSun-33 treated with 50 mg/kg chromium and 5 mM EDTA. In terms of accumulation of heavy metals, HiSun-33 demonstrated better accumulation of the tested heavy metals then SanSun-33, anyhow the growth of SanSun-33 was better than HiSun-33 due to lesser accumulation of heavy metals.  

scholarly journals The use of heavy metal accumulating plants for detoxication of chemically polluted soils

2004 ◽  
Vol 52 (1) ◽  
pp. 113-120 ◽  
Author(s):  
Jacek Antonkiewicz ◽  
Czesława Jasiewicz ◽  
Pavel Ryant
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Plant Species ◽  
Contaminated Soil ◽  
Jerusalem Artichoke ◽  
Pot Experiment ◽  
Polluted Soils ◽  
Indicator Plants ◽  
Element Contents

The studies conducted from 1997 to 1999 in a vegetation hall were performed as a pot experiment on ordinary silt soil. Jerusalem artichoke, maize, Sida hermaphrodita Rusby, amaranth and hemp were used as indicator plants. The results confirmed, great diversification of the element contents which depends not only on the species but also on the part of individual plants. Analysis of the data revealed also another dependence: increased concentration of heavy metals in the soil corresponded to a higher content of heavy metals in the plants. Significant differences in this respect were observed for the plant species grown in unpolluted or differently contaminated soil.

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