A New Method for Ecological Risk Assessment of Combined Contaminated Soil

Wang, Qiaoping; Wang, Junhuan; Cheng, Jiaqi; Zhu, Yingying; Geng, Junping; Xin, Wang; Feng, Xian; Hou, Hong

doi:10.3390/toxics11050411

Cited by 4 publications

(3 citation statements)

References 39 publications

(67 reference statements)

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“…Microorganisms are the first living organisms affected by heavy metal contamination of soil. In our study, HM contamination significantly reduced both respiration (Figure 3) and enzymatic activities (Figure 6), demonstrating how these parameters can be used as indicators of substrate quality and indicators of HM contamination [41,42].…”

Section: Discussionsupporting

confidence: 59%

Biological Activities in Artificially Heavy-Metal-Contaminated Growing Substrates

Papa,

Alvarez-Romero

2023

Soil Systems

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The ingestion of vegetables grown in soils or in cultivation substrate contaminated with heavy metals (HMs) and irrigated with wastewater is a potential problem for human health and food quality. The increasing disappearance of fertile soils has led to an increase in the practice of soil-less cultivation and the use of growing substrates, but the choice of the right substrate and its sustainable management is essential to ensure the production of quality and safe vegetables for all while minimizing the impact on the environment and human health. The present study measures the combined effects of different HMs (V, Ni, Cd, Pb, Cu, Cr) on microbial biomass, respiration, and enzyme activities (EAs) in an artificially contaminated commercial growing substrate. The concentrations of HMs were estimated by Atomic Absorption Spectroscopy; enzyme activities via spectrophotometric assays; respiration via CO2 evolution; and microbial biomass C via the fumigation extraction method. The results showed a reduction in both respiration and all enzyme activities. The reduction in EAs highlighted a notable influence on microorganism-mediated C, N, S, and P cycles, strongly reducing substrate health. Microbial biomass did not show significant differences, but the increase in the metabolic quotient highlighted how the toxicity of HMs reduces the energy use efficiency of microbial metabolic processes.

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Section: Discussionsupporting

confidence: 59%

Biological Activities in Artificially Heavy-Metal-Contaminated Growing Substrates

Papa,

Alvarez-Romero

2023

Soil Systems

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“…The formulas for each exposure pathway are as follows:

where

is the

concentration in the topsoil of the study area (µg·kg −1 ) (namely,

concentration in the surface soil), which is obtained by converting the concentration of PAHs to the toxic equivalent of benzo[a]pyrene (BaP) using the toxic equivalency factor [ 13 ]. The other parameters in the formula are listed in Table 1 [ 14 , 15 ].…”

Section: Methodsmentioning

confidence: 99%

“…The other parameters in the formula are listed in Table 1 [14,15]. The toxic equivalency quantities (TEQ) of PAHs were calculated based on the following equation:…”

Section: Ecological and Health Risk Assessmentmentioning

confidence: 99%

Characteristics and Risk Assessment of PAH Pollution in Soil of a Retired Coking Wastewater Treatment Plant in Taiyuan, Northern China

Zhang

Guo

et al. 2023

Toxics

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We analyzed the soil at the site of a former coking wastewater treatment plant on redeveloped land in Taiyuan, northern China, in an attempt to detect the presence of 16 types of priority polycyclic aromatic hydrocarbons (PAHs) listed by the United States Environmental Protection Agency (US EPA) and evaluate the potential pollution risks. The results show that the total proportion of PAHs in the surface soil of the redeveloped land ranged from 0.3 to 1092.57 mg/kg, with an average value of 218.5 mg/kg, mainly consisting of high-ring (5–6 rings) components. Characteristic ratio analysis indicated that the pollution was mainly related to the combustion of petroleum, coal, and biomasses. The wastewater treatment units operated according to the following treatment train: advection oil separation tank, dissolved air flotation tank, aerobic tank, secondary sedimentation tank, and sludge concentration tank. Our study found that pollution resulting from low-ring PAHs mainly appeared in the advection oil separation tank during the pre-wastewater treatment stage, while medium-ring PAH contamination mainly occurred in the dissolved air floatation tank, aerobic tank, and secondary sedimentation tank during the middle stages of wastewater treatment. High-ring PAH contamination primarily appeared in the sludge concentration tank in the latter stage of wastewater treatment. Based on our assessment of the ecological risk using the Nemerow Comprehensive Pollution Index and the toxicity equivalent factor (TEF) method, we determined that individual PAHs in the study area exceeded acceptable levels and the total amount of pollution was potentially harmful to the ecological environment. In addition, the comprehensive lifetime cancer risk for different populations resulting from exposure to the soil in the study area was determined to be within acceptable limits based on the average PAH concentrations.

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Research trends in Caenorhabditis elegans and aging from 2004 to 2023: a bibliometric analysis.

Zhang,

Quan,

Zeng

et al. 2024

Preprint

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Caenorhabditis elegans (C. elegans) have emerged as a prominent model organism for investigating aging, owing to its short life cycle, complete body transparency, protein editing capabilities, and advancements in aging-related pathways. Despite the significance of C. elegans in aging research, there is currently a lack of bibliometric analysis on this topic. To address this gap and gain deeper insights into C. elegans and aging, we retrieved 6204 records from the Web of Science database and employed scientometric tools such as CiteSpace and VOSviewer software to conduct an extensive analysis encompassing countries/regions, institutions, authors, journals, co-cited literature, and keywords. This study aims to provide a comprehensive assessment of research trends in the field of C. elegans and aging using bibliometric approaches while also identifying potential avenues for future investigations. Currently, key areas within C. elegans and aging research primarily revolve around dauer larvae、caloric restriction、stress resistance and alzheimers disease pathogenesis exploration. It is noteworthy that insulin, anti-aging, free radicals, neurodegeneration, and antioxidants have emerged as the most prominent and rapidly advancing frontiers in current research. We anticipate that this study will contribute to the advancement of scientific research in C. elegans and aging, while facilitating potential collaborations and fostering interdisciplinary partnerships for scientists and scholars.

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A New Method for Ecological Risk Assessment of Combined Contaminated Soil

Cited by 4 publications

References 39 publications

Biological Activities in Artificially Heavy-Metal-Contaminated Growing Substrates

Biological Activities in Artificially Heavy-Metal-Contaminated Growing Substrates

Characteristics and Risk Assessment of PAH Pollution in Soil of a Retired Coking Wastewater Treatment Plant in Taiyuan, Northern China

Research trends in Caenorhabditis elegans and aging from 2004 to 2023: a bibliometric analysis.

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