Mechanism underlying earthworm on the remediation of cadmium-contaminated soil

Wu, Yong; Chen, Cun; Wang, Gang; Xiong, Binjun; Zhou, Wenmin; Xue, Feilong; Qi, Wei-liang; Qiu, Chengshu; Liu, Zhibin

doi:10.1016/j.scitotenv.2020.138904

Cited by 43 publications

(16 citation statements)

References 49 publications

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“…By contrast, the bentonite and iron oxide reduced the solubility of the Cd and the bentonite reduced the solubility of the Zn (Figures 2 and 3). The mobilization of metals, such as Zn and Cd, in contaminated soils treated with organic amendments was observed previously and can be attributed to pH shifts or the release of large amounts of humic acids from biosolids [42,54,55]. However, the observed increased Cd solubility in the compost-treated soils was not reflected by a raised bioaccumulation of Cd in the earthworm tissues.…”

Section: Solubility Of Trace Elements In Soils Driven By Applied Amen...supporting

confidence: 56%

“…For this purpose, earthworms are considered to be the most important bio-indicators due to their intimate (external and internal) contact with the soil and the possibility they offer of evaluating the potential of TE bioaccumulation and food-chain transfer [7,13,31,33,34]. Studies published in recent years pointed out that the variation in the TE bioaccumulation in worms may be dependent on their bioavailability [35][36][37][38][39][40], it is as affected by soil factors influencing metal solubility (pH and redox) and complexation with organic matter [41][42][43] However, these factors and mechanisms are still poorly understood. Moreover, earthworm studies in contaminated areas have mainly focused on the analysis of the assimilation of TE by earthworms in artificially contaminated soils.…”

Section: Introductionmentioning

confidence: 99%

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The Effect of Soil Amendments on Trace Elements’ Bioavailability and Toxicity to Earthworms in Contaminated Soils

Ukalska‐Jaruga

Siebielec

et al. 2022

Applied Sciences

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The aim of this study was to assess the impact of soil amendments, characterized by different sorption properties, on the effectiveness of trace elements’ (Cu, Zn, Pb, Cd, Ni, and Cr) stabilization and bioavailability to earthworms. The study was conducted as a microcosm experiment using soil derived from a heavily contaminated post-industrial area. The Eisenia veneta earthworm was cultured for 4 weeks in soils amended with materials characterized by different properties, origins, and potential effects on limiting the availability of metals in soils: two type of compost (Zabrze compost-ZC; GWDA compost-GC), two types of biosolid (Bełchatów biosolids-BB, Grabów biosolids-GB), calcium phosphate (CP), iron oxide (IO), bentonite (BE), rock waste (RW), and limestone (CC). After the incubation, the biomass and survival numbers of the earthworm species decreased significantly (p < 0.05). The accumulation of metals in the earthworm tissues expressed by the bioaccumulation factor value (BSAF) were dependent on the type of amendment applied to the soil. The highest decrease in the earthworms’ weight and survival rate was caused by compost (72%) and bentonite (33%), while the lowest was caused by the rock waste (10%) and iron oxide (11%). The biosolids exhibited the greatest toxicity, causing the mortality of all the earthworms. The accumulation of metals in earthworm tissues and the BSAF value were dependent on the type of amendment applied to the soil. The BSAF for the contaminated soil by Cd decreased to the greatest extent after the addition of ZC (by 57%), GC (55%), CP (41%), and IO (37%). A similarly positive effect was noted for Pb after IO addition (45% decrease). The Zn, Cr, and Ni concentration in earthworms, contrary to other elements, increased, regardless of the amendment. The results showed that the applied soil amendments were characterized by varying potential for the reduction in the metal bioavailability in the soil, depending on their composition and physicochemical properties. Moreover, earthworms may exhibit a diversified response to soil amendments as a result of the impact of amendment on the metal forms in soils and their direct impact on organisms. Generally, the Cd was easily transferred from the soil into and accumulated in the earthworm tissues. Our study confirms that this element creates the highest risk for the trophic chain in soils affected by the Zn and Pb smelting industry. Moreover, greater Zn supply reduces the accumulation of Cd in animal bodies. This study provides valuable practical knowledge on the short-term biological effects of a range of soil amendments in metal-contaminated soils.

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Section: Solubility Of Trace Elements In Soils Driven By Applied Amen...supporting

confidence: 56%

Section: Introductionmentioning

confidence: 99%

The Effect of Soil Amendments on Trace Elements’ Bioavailability and Toxicity to Earthworms in Contaminated Soils

Ukalska‐Jaruga

Siebielec

et al. 2022

Applied Sciences

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“…Solidification, in/ex situ extraction and electrokinetics, is certain chemical technology that can be implemented to remediate cadmium-contaminated soil and water (Wu et al 2020;Mulligan et al 2001). The latter use reverse osmosis, chemical precipitation, and ion exchange processes, but have usually high operating costs and usually impact the quality of the soil (Wu et al 2020). Solidification is a method whereby chemicals are injected to trap the contaminants and hinder their mobility for later treatment or excavation (Mulligan et al 2001).…”

Section: Chemical Remediationmentioning

confidence: 99%

“…This method is successful for shallow contaminations and can be implemented both on/off site (Mulligan et al 2001). A study by Wu et al (2020) related the combined use of earthworms, plants, and microorganisms to the effective, low-cost rhizofiltration of cadmium-contaminated soils. Rhizofiltration is the process whereby heavy metals are indirectly absorbed from the soil and water by plants and animals with high tolerance levels.…”

Section: Biological Remediationmentioning

confidence: 99%

Occurrence of cadmium in groundwater in China: a review

2022

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China has one of the world’s fastest-growing economies due to its increase in various industrial activities. A side effect of economic growth is severe environmental problems such as heavy metal contamination of soil and groundwater. Anthropogenic activities are the main sources of cadmium which is highly mobile and toxic with the potential to bioaccumulate in the ecosystem. It can contaminate ground and river water consequently negatively impacting agriculture and water sources. Anthropogenic source of Cd concentrations in China is 0.002 mg/L in drinking water, 0.102 mg/kg in soil, and 0.23–0.96 mg/kg in paddy soil. Geological trends and health implications of cadmium contamination in Human, southern China were analyzed. Source, transportation, and various conventional remediation processes exist today and can be categorized as biological, physical, and chemical. Using nanoparticle technology, it has been found that adsorption capacities can be 3 to 4 times higher compared to using powdered activated carbon. From the experiment carried out, a maximum adsorption capacity of 10.86 mg/g for cadmium was obtained. Cadmium intake in south China populations occurred at an alarming rate and most children were at greater risk of being affected. Therefore, cadmium contamination should be taken seriously by the responsible authorities.

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“…Recently, antihelminthic treatment has attracted significant scientific interest as an expanded technology for the biological treatment of potentially toxic elements in contaminated soils [12][13][14][15][16]. Nonetheless, earthworm abundance and network shape are dependable signs to evaluate soil infection and also can repair infected soil through bioaccumulation [17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Study of the Effect of Mercury Salt on the Presence of Annelida (Lumbricus terrestris) in Soil and the Histological Changes on the Skin Tissue

Salman

Khudhair

AL-ANI

et al. 2022

Applied and Environmental Soil Science

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The earthworm is the most beneficial organism for assessing metallic contamination due to the fact that critical high-quality correlations have been determined between earthworm steel concentrations and soil cadmium, copper, lead, zinc, and mercury concentrations. The mercury compounds are very poisonous for most organisms. Here, we investigated the ability of earthworms (Lumbricus terrestris) to HgCl2 (below laboratory conditions). A study of the effect of five different salt concentrations of mercury chloride (HgCl2) 1 ppm, 5 ppm, 10 ppm, 50 ppm, and 100 ppm was studied on worm survival and calculation of the concentration required to destroy half the number of worms (LC50). The results showed that there is an inverse relationship between these salt concentrations and the time required to perish 100% of worms. It was found that the concentration of 100 ppm is the lethal concentration of half the number (LC50) of the earthworm (Lumbricus terrestris). The effects of the salt concentrations used confirmed their effect on the experimental worm weights as well, so the concentration of 50 ppm was the most influential on earthworm weights of the type of Lumbricus terrestris, as it caused a reduction 12% of worm weights with a significant difference, while the concentrations 1 ppm and 100 ppm were the least effective, as they caused the worms to decrease by only (5%), while the remaining two concentrations 5 ppm and 10 ppm caused their effect to decrease by 7% only. Thus, it can be concluded that lower worm weights have nothing to do with the lethal concentrations of the heavy metal salt (HgCl2). The histological study also showed that low concentrations of mercury chloride salt have less effect on earthworms’ skin tissue compared to higher concentrations.

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Mechanism underlying earthworm on the remediation of cadmium-contaminated soil

Cited by 43 publications

References 49 publications

The Effect of Soil Amendments on Trace Elements’ Bioavailability and Toxicity to Earthworms in Contaminated Soils

The Effect of Soil Amendments on Trace Elements’ Bioavailability and Toxicity to Earthworms in Contaminated Soils

Occurrence of cadmium in groundwater in China: a review

Study of the Effect of Mercury Salt on the Presence of Annelida (Lumbricus terrestris) in Soil and the Histological Changes on the Skin Tissue

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