Effect of Vermicomposting on the Concentration of Heavy Metals in Soil with Drill Cuttings

Kujawska, Justyna; Wójcik-Oliveira, Katarzyna

doi:10.12911/22998993/93868

Cited by 9 publications

(3 citation statements)

References 6 publications

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“…Pb and Cd concentrations in earthworm casting or vermicompost were reduced due to bio-assimilation of these metal elements in P. posthuma tissues. In a same way, some researcher reported the reduced level of heavy metals (Pb and Cd) in worm casting in relation to the parent mixtures (Kujawska and Wójcik-Oliveira, 2019). As the organic waste mixed in soil passing through elementary tract of earthworms, where the soluble form of heavy metals assimilated and increased in worm's tissues which ultimately decrease the metal concentration in worm's casting (Pattnaik and Reddy, 2011).…”

Section: Discussionmentioning

confidence: 93%

The impact of cow dung augmentation on soil restoration and bio-accumulation of metals (Lead and Cadmium) in Pheretima posthuma (Annelida: Clitellata)

et al. 2023

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To investigate the role of cow dung in soil reclamation and bio assimilation along with bio accumulation of heavy metals in earthworm (P. posthuma) (N=900) earthworms were used and treatment groups of CD-soil mixture of different proportion of cow dung were designed. Nonlethal doses of lead acetate and cadmium chloride were added in treatment groups. Mature P. posthuma were released in each experimental pot maintaining the favorable conditions. The pH, carbon, nitrogen, phosphorus, exchangeable cations, and heavy metal level of each mixture was evaluated. The results indicated that bio-assimilation of Pb and Cd by P. posthuma were significantly (P ˂ 0.01) higher in different soil-CD treatments compared to control. Highest bio-assimilation of both metals was observed in T1 of both groups (Pb = 563.8 mg/kg and Cd = 42.95 mg/kg). The contents of both metals were significantly (P ˂ 0.05) lowered in casting. The nutrient concentration in the final castings of all soil-CD treatments were also equally transformed from less or insoluble to more soluble and available for plants, except for carbon level which increased with CD proportion. It is concluded that cow dung as organic matter has a positive effect on soil reclamation and bio-assimilation of metals by P. posthuma.

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Section: Discussionmentioning

confidence: 93%

The impact of cow dung augmentation on soil restoration and bio-accumulation of metals (Lead and Cadmium) in Pheretima posthuma (Annelida: Clitellata)

et al. 2023

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“…Earthworms can be useful biological indicators of pollutions (Gonzalez-Alcaraz et al, 2018; Huang et al, 2021) due to their consistent relationship between the concentrations of some contaminants in their tissues and the soil (Leveque et al, 2013;Kujawska and Wojcik-Oliveira, 2019).…”

Section: Introductionmentioning

confidence: 99%

Association between heavy metal uptake and growth and reproduction in the anecic earthworm, Alma nilotica (Grube 1855)

Fai,

Ngogang,

Kouemo

et al. 2023

Ecotoxicology

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Elevated heavy metal concentrations in soils is a cause for concern as they are hazardous to soil organisms including earthworms which are considered as ecosystem engineers. Current ecotoxicity tests predominantly use temperate earthworm species, and thus there is the need to include a broader genera of native species to improve ecological risk assessment. Alma nilotica, is a tropical anecic earthworm species that survives well under laboratory conditions and has potential for use in ecotoxicology testing but lacks published toxicity data for important pollutants. Growth and reproduction bioassays were carried out with Alma nilotica to determine the relationship between the concentrations of Cu, Zn, Pb and Cr in spiked soils and their bioaccumulation and toxic effects. Positive linear relationships were found between soil-metal and internal earthworm-metal concentrations. Cu did not inhibit growth up to 35 days of exposure but became toxic with longer exposure duration. Zn was not regulated by Alma nilotica although it is an essential metal that is well regulated by Eisenia sp. commonly used in standard ecotoxicity tests, showing differences in metal regulation by earthworms of different ecological functional groups. Based on bioaccumulation factors (BAFs), growth inhibition and reproduction effects the metals were ranked in decreasing toxicity as Pb > Cr > Zn > Cu. The mean 20% Internal Effects Concentrations (IEC20s) for reproduction were 1.03. 1.77, 10.2 and 218 mg metal/kg earthworm for Pb, Cr, Zn and Cu respectively. These data can contribute to the improvement of metal risk assessment particularly in tropical contexts.

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“…The potential of earthworms to stabilize the sewage sludge was described by many authors, who found that various earthworms have a different potential in terms of their ability to convert the organic matter in SS to organic fertilizer in VC (Bartkowska et al 2019;Gupta & Garg 2008;Reddy et al 2012;Soobhany et al 2017;Suthar 2009). However, the experimental results regarding the ability of earthworms to affect the heavy metal concentrations are rather contradictory (Azizi et al 2013;Kujavska et al 2019;Sinha et al 2010).…”

Section: Introductionmentioning

confidence: 99%

Agro-ecological Characterization of Vermicomposted Sewage Sludge from Municipal and Poultry Enterprise Wastewater Treatment Plants

Dermendzhieva¹,

Dinev²,

Kostadinova³

et al. 2021

JSM

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The purpose of this study was to make an agro-ecological characterization of vermicompost (VC) produced from sewage sludge (SS). As a substrate, SS from municipal and poultry meat processing enterprise wastewater treatment plants (MTP and PTP, respectively) was utilized. The substrates were vermicomposted by Red Californian earthworm (Lumbricus rubellus) for 120 days. For VC quality assessment, 19 physicochemical and 6 microbiological parameters were used. The evaluation of physicochemical parameters was done according to ISO standard methods and microbiological analysis-by plating 1 mL of sample dilutions on selective, chromogenic culture medium sheets. It was found that the vermicompost from MTP (VC-M) had higher levels of EC, mineral elements (N, P and K compounds in forms available to plants), heavy metals (Mn, Cu, Zn, Cr, Ni, Pb, Cd) and coliforms, and lower levels of pH, TOC, C/N ratio, Fe, total plate count (TPC), Enterobacteriaceae and Salmonella spp. counts compared to VC from PTP (VC-P). During the vermicomposting process, the substrates from both wastewater treatment plants (TPs) showed similar trends towards decrease in pH, TOC, N-NH4+, C/N ratio, TPC, coliforms, E. coli, Enterobacteriaceae and Salmonella spp. counts, whereas the opposite trends were established for EC, TKN, N-NO3-, TP, P2O5, TK, and K2O values. The vermicomposting had a negligible effect on heavy metal concentrations. In the final substrates E. coli were not detected, while the bacterial spore forms (Clostridium perfringens) were not eliminated. The final substrates cannot be used as fertilizers or soil amendments because of the presence of Salmonella spp. and C. perfringens over the permissible limits according to EU and Bulgarian regulations.

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Effect of Vermicomposting on the Concentration of Heavy Metals in Soil with Drill Cuttings

Cited by 9 publications

References 6 publications

The impact of cow dung augmentation on soil restoration and bio-accumulation of metals (Lead and Cadmium) in Pheretima posthuma (Annelida: Clitellata)

The impact of cow dung augmentation on soil restoration and bio-accumulation of metals (Lead and Cadmium) in Pheretima posthuma (Annelida: Clitellata)

Association between heavy metal uptake and growth and reproduction in the anecic earthworm, Alma nilotica (Grube 1855)

Agro-ecological Characterization of Vermicomposted Sewage Sludge from Municipal and Poultry Enterprise Wastewater Treatment Plants

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