Heavy Metal Pollution in Aquaculture: Sources, Impacts and Mitigation Techniques

Emenike, Ebuka Chizitere; Iwuozor, Kingsley O.; Anidiobi, Stella Ukamaka

doi:10.1007/s12011-021-03037-x

Cited by 123 publications

(40 citation statements)

References 145 publications

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“…It can be seen that except for As, the average contents of other heavy metals in the pond were higher than those in the river (Figure 5). It is generally believed that As comes from pesticides and fertilizers used in agricultural production and aquaculture (Emenike et al;Jiang et al 2021). Combining with Figure 6(b), the content of As in surface water near aquaculture areas was relatively high.…”

Section: Content Characteristics Of Heavy Metalsmentioning

confidence: 67%

Optical property of dissolved organic matter and its correlation with heavy metals in surface water around metal mines to be exploited in southern Anhui Province, China

Feng

2022

Water Supply

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In this study, to clarify the optical characteristics of dissolved organic matter (DOM) in the surface water around the metal mine to be exploited and its relationship with heavy metals, 11 pond water samples and 21 river water samples were collected around the typical to be exploited metal mine in southern Anhui Province, China. The optical properties of DOM in surface water were studied by ultraviolet-visible (UV-Vis) spectroscopy and excitation-emission matrix (EEM) spectroscopy. Co-occurrence network analysis revealed the intrinsic relationship among UV-Vis spectral parameters, fluorescent components, and heavy metals. The results showed that the DOM in the river had higher content, but its molecular weight was smaller than in the pond. EEM coupled with parallel factor analysis (EEM- PARAFAC) revealed humic-like components (C1 and C2) and protein-like components (C3), and the average content of each fluorescent component in the river was higher than that in the pond. However, except for As, the average content of other heavy metals (Cr, Cu, Cd, Pb, and Zn) in ponds was more significant than in rivers. The co-occurrence network analysis result revealed that there might be different relationships between heavy metals and the DOM due to the various land-use.

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Section: Content Characteristics Of Heavy Metalsmentioning

confidence: 67%

Optical property of dissolved organic matter and its correlation with heavy metals in surface water around metal mines to be exploited in southern Anhui Province, China

Feng

2022

Water Supply

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“…Higher value was reported for Pb (0.39 mg/kg) by Bada and Olarinre (2012), but their study centered on plants obtained from oil contaminated soil, a factor that might have contributed to the high levels of these metals. Pb is a non-essential element that has no known biochemical bene t to both plants and animals (Emenike, Iwuozor et al 2021). It readily accumulates in different parts of the plant and gets to human by biomagni cation (Sharma and Dubey 2005).…”

Section: Discussionmentioning

confidence: 99%

Phytochemical, Heavy Metals and Antimicrobial Study of the Leaves of Calopogonium Mucunoides

Emenike

Chukwuebuka

2021

Preprint

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Background: In this study, the phytochemical, heavy metals, and antimicrobial characteristics of the leaves of Calopogonium mucunoides were investigated in other to determine its therapeutic potentials. The phytochemicals present in the leaves were extracted with n-hexane, methanol and ethyl acetate, and the extracts were used to investigate for the phytochemical constituents and antimicrobial activity. The methanol extract was used to test for the concentration of five heavy metals.Results: The result of the phytochemical screening confirmed the presence of alkaloids, anthocyanins, flavonoids, glycosides, phenols, reducing sugars, saponins, steroids, tannins, and terpenoids in various quantities. The heavy metals analysis result revealed the presence of lead (0.08 mg/kg) and iron (0.08 mg/kg) well below the acceptable limits set by the World Health Organization for heavy metals in plants, while cadmium, nickel and zinc were found to be below detectable limits. The extracts were tested against thirteen human pathogens (ten bacteria and three fungi) using the disk diffusion method. The extracts possessed a broad range of microbial activities, with the methanolic extract reportedly showing the highest zone of inhibition (31 mm) against Bacillus sp. while the n-hexane extract did not show any antimicrobial activity in the whole test organisms.Conclusion: The results obtained revealed that the leaves of C. mucunoides has some therapeutic values and could be exploited in the preparation of herbal drugs for the treatment of various ailments.

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“…Notably, according to Chilean National System of Environmental Information (SNIFA) and Pollutant Emission and Transfer Registry of Chile (RETC) the aquaculture is the industry that mostly discharge metals into the waters in Los Lagos Region due to the production of balanced feed, which include minerals and fishmeal obtained from raw materials containing metals ( Choi and Cech, 1998 ), furthermore, fertilizers applied to fish farms may contain heavy metals ( Emenike et al., 2021 ). In addition to the high concentration of HMs, there are also several wastewater plants that discharge the treated water into the coasts of Los Lagos Region ( Figure 4 ).…”

Section: Chile: Antibiotics and Heavy Metals As Marine Pollutants In ...mentioning

confidence: 99%

The High Risk of Bivalve Farming in Coastal Areas With Heavy Metal Pollution and Antibiotic-Resistant Bacteria: A Chilean Perspective

Pavón

Riquelme

Jaña

et al. 2022

Front. Cell. Infect. Microbiol.

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Anthropogenic pollution has a huge impact on the water quality of marine ecosystems. Heavy metals and antibiotics are anthropogenic stressors that have a major effect on the health of the marine organisms. Although heavy metals are also associate with volcanic eruptions, wind erosion or evaporation, most of them come from industrial and urban waste. Such contamination, coupled to the use and subsequent misuse of antimicrobials in aquatic environments, is an important stress factor capable of affecting the marine communities in the ecosystem. Bivalves are important ecological components of the oceanic environments and can bioaccumulate pollutants during their feeding through water filtration, acting as environmental sentinels. However, heavy metals and antibiotics pollution can affect several of their physiologic and immunological processes, including their microbiome. In fact, heavy metals and antibiotics have the potential to select resistance genes in bacteria, including those that are part of the microbiota of bivalves, such as Vibrio spp. Worryingly, antibiotic-resistant phenotypes have been shown to be more tolerant to heavy metals, and vice versa, which probably occurs through co- and cross-resistance pathways. In this regard, a crucial role of heavy metal resistance genes in the spread of mobile element-mediated antibiotic resistance has been suggested. Thus, it might be expected that antibiotic resistance of Vibrio spp. associated with bivalves would be higher in contaminated environments. In this review, we focused on co-occurrence of heavy metal and antibiotic resistance in Vibrio spp. In addition, we explore the Chilean situation with respect to the contaminants described above, focusing on the main bivalves-producing region for human consumption, considering bivalves as potential vehicles of antibiotic resistance genes to humans through the ingestion of contaminated seafood.

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Heavy Metal Pollution in Aquaculture: Sources, Impacts and Mitigation Techniques

Cited by 123 publications

References 145 publications

Optical property of dissolved organic matter and its correlation with heavy metals in surface water around metal mines to be exploited in southern Anhui Province, China

Optical property of dissolved organic matter and its correlation with heavy metals in surface water around metal mines to be exploited in southern Anhui Province, China

Phytochemical, Heavy Metals and Antimicrobial Study of the Leaves of Calopogonium Mucunoides

The High Risk of Bivalve Farming in Coastal Areas With Heavy Metal Pollution and Antibiotic-Resistant Bacteria: A Chilean Perspective

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