Vermiremediation of an invasive and pernicious weed salvinia (Salvinia molesta)

Hussain, Naseer; Abbasi, S. A.

doi:10.1016/j.ecoleng.2016.03.010

Cited by 47 publications

(25 citation statements)

References 43 publications

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“…The study indicated that the final vermicompost of decanter cake was more stabilized than the initial wastes. Hussain et al (2016a) studied TG analysis during vermicomposting of salvinia weed. The TG analysis revealed that the maxmimum mass loss (75.4%) was observed in the initial substrate whereas in the final vermicompost maximum mass loss was only 66.25%.…”

Section: Thermogravimetric (Tg) Analysis In Vermicompostingmentioning

confidence: 99%

“…Further disaggregation by enzymes and microflora act on the substrate occurs during the passage in the gut of the earthworm (Edwards and Bohlen 1996). Various researchers have used SEM technique to observe the changes in surface morphology of pre-and post-vermicomposted organic wastes (Ravindran et al 2008;Ravindran and Sekaran 2010;Zhao et al 2010;Li et al 2011;Unuofin and Mnkeni 2014;Lim et al 2014Kumar et al 2014;Rajpal et al 2014;Bhat et al 2014Bhat et al , 2015aWu 2015, 2016;Hussain et al 2016a). Ravindran et al (2008) recorded SEM to know the changes in surface morphology (texture) in the control and final vermicomposted mixtures of a solid waste (animal fleshing) produced from leather industry.…”

Section: Relevance and Use Of Sophisticated Techniques (Sem Ft-ir Tmentioning

confidence: 99%

“…The final vermicomposted mixtures revealed a more fragmented texture than the initial waste mixtures. Hussain et al (2016a) studied SEM to identify the disaggregation of salvinia weed during its vermicomposting. The micrographs of the final vermicompost revealed strong disaggregated material as compared to that of the initial mixtures which showed contiguous structures.…”

Section: Relevance and Use Of Sophisticated Techniques (Sem Ft-ir Tmentioning

confidence: 99%

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Instrumental characterization of organic wastes for evaluation of vermicompost maturity

Bhat

Singh

2017

J Anal Sci Technol

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Instrumental analysis of vermicompost with the help of modern technologies provides essential information on its maturity, before it can be used for agricultural application. Nowadays, vermicompost is considered as a promising organic alternative to chemical fertilizers in agriculture and horticulture. The objectives of this review are to summarize the sophisticated instrumental techniques such as scanning electron microscopy (SEM), fourier transform infrared (FT-IR) spectroscopy, thermogravimetry (TG), ultraviolet-visible (UV-vis) spectroscopy techniques, physico-chemical parameters (pH, electrical conductivity, organic carbon content, C:N ratio, nitrogen, phosphorus, potassium, sodium, calcium) and biological indicator (germination index) to determine the maturity of vermicompost produced from organic wastes. These techniques are reliable, fast and are capable of tracking organic waste degradation during the bioconversion process and fertilizing ability of the final product. SEM analysis provides essential information on surface morphology of vermicompost samples. The SEM micrograph of final vermicompost reveals disaggregation. In contrast, the initial SEM micrograph reflects robust and relatively contiguous structures. FT-IR spectroscopy technique is used to confirm the decomposition of polypeptides, polysaccharides, aliphatic, aromatic, carboxylic, phenolic groups and lignin during vermicomposting of organic wastes. TG method is used to characterize organic waste mineralization where progressive reduction in the mass loss of vermicompost indicates net mineralization and degradation. UV-vis spectroscopy is used to assess the degree of humification. The sharp fall in humification index during vermicomposting process indicates high level of organic material humification. Changes in physico-chemical and biological parameters are also an indicative parameter for organic waste mineralization as well as vermicompost stability and maturity.

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Section: Thermogravimetric (Tg) Analysis In Vermicompostingmentioning

confidence: 99%

Section: Relevance and Use Of Sophisticated Techniques (Sem Ft-ir Tmentioning

confidence: 99%

Section: Relevance and Use Of Sophisticated Techniques (Sem Ft-ir Tmentioning

confidence: 99%

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Instrumental characterization of organic wastes for evaluation of vermicompost maturity

Bhat

Singh

2017

J Anal Sci Technol

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“…As mentioned earlier, earthworms grind the substrate they ingest causing its comminution [74]. There is further disaggregation as enzymes and several species of bacteria act on the substrate during its passage through the earthworm gut [75][76][77][78][79]. These events progressively degrade the substrate as reflected in the SEM images.…”

Section: Gc-ms Analysismentioning

confidence: 99%

Transformation of the pernicious and toxic weed parthenium into an organic fertilizer by vermicomposting

Hussain

Abbasi

2016

International Journal of Environmental Studies

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In what is believed to be the first study of its kind, the compositions of the toxic and allelopathic weed parthenium, and its vermicompost, have been investigated using UV-visible and Fourier transform infrared spectroscopy, thermogravimetric analysis, differential scanning calorimetry, gas chromatography-mass spectroscopy, and scanning electron microscopy. The studies reveal that the weed is transformed into a totally benign organic fertilizer during the course of its vermicomposting. This is indicated by substantial improvements in the humification index, mineralization of organic matter, and degradation of complex aromatics such as lignin and polyphenols into simpler carbohydrates and lipids when parthenium is turned into its vermicompost. There are also significant fragmentation, bio-oxidation and molecular rearrangements of chemical compounds in parthenium vermicompost compared to the parent substrate. In particular, parthenin, which is principally responsible for the toxicity and allelopathy of parthenium, is completely degraded by the vermicomposting of parthenium. The study opens the way to profitable use of the millions of tonnes of parthenium that are generated annually, the continued proliferation of which causes great loss of biodiversity.

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“…One of the ways by which biomass or similar other biodegradable substrates can be gainfully utilized as also have a substrate most of its carbon content sequestered is vermicomposting (Abbasi and Ramasamy, 2001;Abbasi et al, 2013;Hussain et al, 2016a). Vermicomposting is known to convert the substrate's nutrients into more bioavailable forms and imparts to it microflora that is beneficial for plants (Gomes-Brandon and Dominguez, 2013;Karthikeyan et al, 2014).…”

Section: Introductionmentioning

confidence: 96%

Vermicomposting transforms allelopathic parthenium into a benign organic fertilizer

Hussain

Abbasi

2016

Journal of Environmental Management

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Vermiremediation of an invasive and pernicious weed salvinia (Salvinia molesta)

Cited by 47 publications

References 43 publications

Instrumental characterization of organic wastes for evaluation of vermicompost maturity

Instrumental characterization of organic wastes for evaluation of vermicompost maturity

Transformation of the pernicious and toxic weed parthenium into an organic fertilizer by vermicomposting

Vermicomposting transforms allelopathic parthenium into a benign organic fertilizer

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