Revegetating fly ash landfills with Prosopis juliflora L.: impact of different amendments and Rhizobium inoculation

Rai, Umesh; Pandey, Kanti Bhooshan; Sinha, Sarita; Singh, Amita; Saxena, Ruchi; Gupta, Dharmendra K.

doi:10.1016/s0160-4120(03)00179-x

Cited by 133 publications

(57 citation statements)

References 29 publications

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“…It is reported to have an important role in metal phytoremediation due to its ability to eYciently accumulate/tolerate cadmium and copper and aid in the bio-recovery of aluminium from industrial sites (Senthilkumar et al 2005;Thangavel et al 2000). Rai et al (2004) have demonstrated that P. juliXora growing in Xy ash contaminated soils amended with blue-green algae or rhizobia show higher bio-accumulation of iron, manganese, copper, zinc and chromium in its tissues. To understand the molecular nature of heavy metal accumulation in P. juliXora, MTs from the leaf cDNA library of P. juliXora were further examined.…”

Section: Discussionmentioning

confidence: 99%

Heavy metal and abiotic stress inducible metallothionein isoforms from Prosopis juliflora (SW) D.C. show differences in binding to heavy metals in vitro

2008

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Prosopis juliflora is a tree species that grows well in heavy metal laden industrial sites and accumulates heavy metals. To understand the possible contribution of metallothioneins (MTs) in heavy metal accumulation in P. juliflora, we isolated and compared the metal binding ability of three different types of MTs (PjMT1-3). Glutathione S-transferase fusions of PjMTs (GSTMT1-3) were purified from Escherichia coli cells grown in the presence of 0.3 mM cadmium, copper or zinc. Analysis of metal bound fusion proteins using atomic absorption spectrometry showed that PjMT1 bound higher levels of all three heavy metals as compared to PjMT2 and PjMT3. A comparative analysis of the genomic regions (including promoter for all three PjMTs) is also presented. All three PjMTs are induced by H(2)O(2) and ABA applications. PjMT1 and PjMT2 are induced by copper and zinc respectively while PjMT3 is induced by copper, zinc and cadmium. Variation in induction of PjMTs in response to metal exposure and their differential binding to metals suggests that each MT has a specific role in P. juliflora. Of the three MTs analyzed, PjMT1 shows maximum heavy metal sequestration and is thus a potential candidate for use in heavy metal phytoremediation.

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Section: Discussionmentioning

confidence: 99%

Heavy metal and abiotic stress inducible metallothionein isoforms from Prosopis juliflora (SW) D.C. show differences in binding to heavy metals in vitro

2008

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“…Maiti et al (2005), in their plotand field-scale study on the possibility of utilizing Chandrapura FA (pH of 5.5 to 6.5) for backfilling and reclamation of opencast mines, concluded with the advantages of bio-reclamation in the FA-filled area over natural succession. To overcome the problems of ash lagoons, revegetation of ash landfills has been carried out by blending FA with organic materials and applying N-fixing organisms (Cheung et al, 2000;Rai et al, 2004;Vajpayee et al, 2000).…”

Section: Effect Of Plantationmentioning

confidence: 99%

Remediation of fly ash landfills through plantation

Ram¹,

Jha²,

Tripathi³

et al. 2008

Remediation Journal

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In India, a significant area of land is occupied by preexisting coal-fired thermal power plants (TPPs) for the storage of fly ash slurry in ash ponds. However, the area available for storage of fly ash at these TPPs is limited. In addition, this type of fly ash disposal poses a problem due to restricted land availability and potential contamination issues. A viable alternative is the reclamation of fly ash ponds by plantation. A study at the Ramagundam Super Thermal Power Station (RSTPS) in AndhraPradesh, India, on reclamation of a portion of an ash-filled, low-lying area has been performed. This article describes the characteristics of the RSTPS pond ash, ash leachates, and improvements in the fertility status of the reclaimed area over a three-year period. Furthermore, morphometric observations of different planted species indicate that these types of ash-filled, low-lying areas can be suitably reclaimed and the nutrient-rich leachate from ash-filled areas potentially can be used for irrigation purposes. O c 2008 Wiley Periodicals, Inc. INTRODUCTIONCoal will indubitably continue to play a major role in meeting the global demand for energy. The world's coal production is about 5.4 billion metric tonnes per year, most of which goes toward generating 38 percent of the world's electricity requirement (Australian Uranium Association [AUA], 2007). In India, about 70 percent of the total energy requirement is met from the combustion of pulverized coal in thermal power plants (TPPs). This practice will likely continue for the foreseeable future due to the excessive coal reserves in India, estimated at 287 × 10 9 metric tonnes per acre in some areas (Coal India, 2007). However, during combustion of coal in TPPs, various solid wastes, such as fly ash (FA), bottom ash (BA), boiler slag, and flue gas desulfurization (FGD) materials, commonly known as coal combustion by-products (CCBs), are produced (Vom Berg, 1998). The total quantity of these ashes produced is enormous and has been estimated at 118 million metric tonnes per year in India, and exceeds 550 million metric tonnes per year worldwide (Querol et al., 2001). To add perspective, some of the countries with high rates of FA production include Australia, Canada, China, India, the United States, and South Africa (Exhibit 1). This generation rate is expected to increase in light of an ever-increasing demand of electricity. Another concern is the availability of high-ash, low-calorific-value coal for the future due to the potential decrease in the quality of coal over time, especially in view of four to ten times concentration of elements of environmental concern in ash (mineral matter) during combustion (Fernandez-Turiel et al., 1994). In TPPs, FA is disposed of as a slurry into the ash lagoons. Yet, fly ash disposal in ash lagoons poses the potential to cause soil and groundwater contamination due to the high concentration of heavy metals (Jankowski et al., 2006) and radionuclides in fly ash (Vijayan & Behera, 1999). Thousands of hectares of land in India have been...

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“…Chromium can be adsorbed on mineral oxides with exposed inorganic hydroxyl alkaline materials like wood ash, hydroxyapatite, or CaCO3 that increase soil pH above neutral on the surface since the adsorption increases with decreasing pH. The application of soil amendment can alter Cr mobility and its uptake by vegetation (Rai et al, 2004).…”

Section: Resultsmentioning

confidence: 99%

Reducing the leachability of nitrate, phosphorus and heavy metals from soil using waste material

Faridullah

Malik

Fareed

et al. 2017

Braz. J. Chem. Eng.

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-Contaminants like nitrate (NO 3 ), phosphorus (P) and heavy metals in water are often associated with agricultural activities. Various soil and water remediation techniques have been employed to reduce the risk associated with these contaminants. A study was conducted to examine the extent of leaching of heavy metals (Cd, Ni, Pb and Cr), NO 3 and P. For this purpose sandy and silt loam soils were amended with different waste materials, namely wood ash, solid waste ash, vegetable waste, charcoal, and sawdust. The soils were saturated with wastewater. Irrespective of the waste applied, the pH and EC of the amended soils were found to be greater than the control. Charcoal, sawdust and wood ash significantly decreased heavy metals, nitrate and phosphorus concentrations in the leachate. Treatments were more efficient for reducing Ni than other heavy metals concentrations. Waste amendments differed for heavy metals during the process of leaching. Heavy metals in the soil were progressively depleted due to the successive leaching stages. This research suggests that waste material may act as an adsorbent for the above contaminants and can reduce their leachability in soils.

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Revegetating fly ash landfills with Prosopis juliflora L.: impact of different amendments and Rhizobium inoculation

Cited by 133 publications

References 29 publications

Heavy metal and abiotic stress inducible metallothionein isoforms from Prosopis juliflora (SW) D.C. show differences in binding to heavy metals in vitro

Heavy metal and abiotic stress inducible metallothionein isoforms from Prosopis juliflora (SW) D.C. show differences in binding to heavy metals in vitro

Remediation of fly ash landfills through plantation

Reducing the leachability of nitrate, phosphorus and heavy metals from soil using waste material

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