Pollution characteristics and potential ecological risk assessment of metals in the sediments of Xiaoqing River, Jinan

Jiao, Fengchao; Ren, Lei; Wang, Xu; Liu, Wenjie

doi:10.1007/s11356-017-9056-8

Cited by 29 publications

(15 citation statements)

References 38 publications

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“…The background silver content in the tissues of control fish was subtracted from that of the treated samples. The charcoal-filtered tap water used to breed the parental adult zebrafish contained a small amount of silver [52,53]. A total of 160 embryos for each concentration (40 embryos per replicate and four replicates per treatment) were used for ICP-MS measurement.…”

Section: Uptake Of Agnps In Fish Embryosmentioning

confidence: 99%

Silver Nanoparticles in Zebrafish (Danio rerio) Embryos: Uptake, Growth and Molecular Responses

Qiang

Arabeyyat

et al. 2020

IJMS

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Silver nanoparticles (AgNPs) are widely used in commercial applications as antimicrobial agents, but there have recently been increasing concerns raised about their possible environmental and health impacts. In this study, zebrafish embryos were exposed to two sizes of AgNP, 4 and 10 nm, through a continuous exposure from 4 to 96 h post-fertilisation (hpf), to study their uptake, impact and molecular defense responses. Results showed that zebrafish embryos were significantly impacted by 72 hpf when continuously exposed to 4 nm AgNPs. At concentrations above 0.963 mg/L, significant in vivo uptake and delayed yolk sac absorption was evident; at 1.925 mg/L, significantly reduced body length was recorded compared to control embryos. Additionally, 4 nm AgNP treatment at the same concentration resulted in significantly upregulated hypoxia inducible factor 4 (HIF4) and peroxisomal membrane protein 2 (Pxmp2) mRNA expression in exposed embryos 96 hpf. In contrast, no significant differences in terms of larvae body length, yolk sac absorption or gene expression levels were observed following exposure to 10 nm AgNPs. These results demonstrated that S4 AgNPs are available for uptake, inducing developmental (measured as body length and yolk sac area) and transcriptional (specifically HIF4 and Pxmp2) perturbations in developing embryos. This study suggests the importance of particle size as one possible factor in determining the developmental toxicity of AgNPs in fish embryos.

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Section: Uptake Of Agnps In Fish Embryosmentioning

confidence: 99%

Silver Nanoparticles in Zebrafish (Danio rerio) Embryos: Uptake, Growth and Molecular Responses

Qiang

Arabeyyat

et al. 2020

IJMS

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“…As reported, the C.V.s of Zn, Cd, and Pb in sediments from Dongdagou are very large, indicating the possible existence of point source pollution [17]. Sediments as an important indicator for water environment quality assessment have long been a focus [18][19].…”

Section: Distribution Of Heavy Metals In Overlyingmentioning

confidence: 99%

Distribution and Ecological Risk Assessment of Heavy Metals in Sediments in Chinese Collapsed Lakes

Liu

Zhou

et al. 2017

Pol. J. Environ. Stud.

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Surficial sediments and water (27 samples each) were collected from three representative lakes collapsed by mining activities in Huaibei, China. Contents of heavy metals (Sb, As, Cd, Pb, Zn) in both water and sediments were detected via atomic absorption spectrophotometry and atomic fluorescence spectrometry, respectively. The variation coefficient (C.V.) of each heavy metal as well as the partition coefficient (Kd) between surficial sediments and water was calculated. The ecological risks of heavy metals in collapsed lakes were assessed via geoaccumulation index (I geo ), and we estimated the Pearson correlation coefficients between heavy metals. Together with the real situations around collapsed lakes, we resolved the sources of heavy metals. We found that the contents of heavy metals in water were basically below Surface Water Quality Standard I. The contents of heavy metals in the majority of sediment samples exceeded the background levels in the Yangtze River and Huai River areas, but were below the threshold effect concentration. The spatial distributions of heavy metals in surficial sediments were not uniform, as the C.V.s indicate medium variations. Analysis of Partition coefficient showed that Lieshan collapsed lake (LSH) was under severe risk. An analysis of I geo revealed gentle-medium ecological risks from Sb, As, and Cd. The classification and frequency distributions of I geo of five heavy metals indicate that the ecological risk of Cd was the largest. The ecological risk was lowest in Yangzhuang collapsed lake (YZH). These results were confirmed by analysis of C.V. and Kd. Analysis of heavy metal sources showed that the inputs of Sb and As into the three collapsed lakes were human-driven and very complex, probably due to point-source pollution, including leaching from gangue piles and industrial discharge. Cd mainly originated from non-point-source agricultural pollution, while Pb and Zn might mainly originate from natural sources.

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“…Higher OM in the aquaculture sediment might polluted the overlying waters and lead to black and smelly water body. Degrading the OM in the sediment and eliminating it is an effective way to control the water quality [40]. The degradation of OM in the aquaculture sediment was mainly affected by its content, environmental factors, and indigenous microorganisms.…”

Section: Effects Of Dosage Methods On Removal Of Om In Sedimentmentioning

confidence: 99%

Purification Effect of the Aquaculture Wastewater and Sediment by Microbial Nanospheres with Different Material Ratios and Dosing Methods

et al. 2020

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Nanospheres were prepared by different materials of nano-bamboo charcoal powder, zeolite powder, and aquaculture pond sediment in different ratios. It was then fermented with effective microorganisms (EM) active calcium liquid to synthesize the bioactive microbial nanospheres. These nanospheres were used to compare the purification effect of ammonium nitrogen (NH 4 + -N), total nitrogen (TN), and total phosphorus (TP) pollutants in aquaculture wastewater. The indoor simulation experiment was also conducted to compare the different dosage methods (one-time dosing without aeration, multiple dosing without aeration, and multiple dosing with aeration) of microbial nanospheres on the removal of organic matter (OM) and effect of the biodegradability (G value) in aquaculture sediment. The results obtained indicated that the purification effect was most remarkable when the mass ratio of nano-bamboo charcoal powder: zeolite powder: pond sediment was 10%: 15%: 75%, in which the maximum removal rate of NH 4 + -N, TN, and TP reached up to 84.86%, 52.15%, and 50.35%, respectively. Under the same microbial nanospheres amount, the effect of one-time addition on the removing of OM in sediment was not as effective as that of multiple dosing. After the 20th day, the removal rate of OM reached 25.99% in multiple dosing treatment and it was 35.58% higher than one-time dosing treatment. The OM content in sediment was reduced by 32.38% under the multiple dosing with aeration treatment. Multiple dosing of microbial nanospheres with aeration increased the G value of sediment about 337.0%. In situ experiment further indicated that the microbial nanospheres dosage with aeration had a good sediment bio-remediation effect, which is applicable to solve the problem of endogenous pollution in aquaculture ponds.leads to the ecological degradation and the serious diseases [3]. Therefore, repairing the eutrophic aquaculture environment requires not only the reduction of nitrogen, phosphorus, and organic matter in the aquaculture water, but also the removal of the sediment mud. In the aspect of aquaculture water purification, the leading technologies include biological filter treatment [4], artificial floating bed cultivation [5], artificial wetland [6], and so on. Due to the shortage of freshwater resources, the high density of breeding and a large amount of bait in the aquaculture industry as well as the present aquaculture water treatments still have problems, such as single treatment method adoption, high cost, and difficult operation [7]. In recent years, a new type of circulating water pond model is applied to reduce the nitrogen and phosphorus content in the aquaculture water, mainly relying on aquatic plants and microbes function [8]. Many studies [9][10][11] have found the composite microbial agents composed of various microbes could make the control effects of aquaculture water quality better. The EM population (containing more than 80 kinds of microbes, with photosynthetic bacteria, lactic acid bacteria, yeast, and actinomycetes as repr...

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Pollution characteristics and potential ecological risk assessment of metals in the sediments of Xiaoqing River, Jinan

Cited by 29 publications

References 38 publications

Silver Nanoparticles in Zebrafish (Danio rerio) Embryos: Uptake, Growth and Molecular Responses

Silver Nanoparticles in Zebrafish (Danio rerio) Embryos: Uptake, Growth and Molecular Responses

Distribution and Ecological Risk Assessment of Heavy Metals in Sediments in Chinese Collapsed Lakes

Purification Effect of the Aquaculture Wastewater and Sediment by Microbial Nanospheres with Different Material Ratios and Dosing Methods

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