Evaluating Heavy Metals Pollution and Exposure Risk Through the Consumption of Four Commercially Important Fish Species and Water from Cross River Ecosystem, Nigeria

Okogwu, Okechukwu Idumah; Nwonumara, Godwin Nkwuda; Okoh, F.

doi:10.1007/s00128-019-02610-4

Cited by 30 publications

(13 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The inorganic state of As is more lethal than organic one [20, 115], and only 10% of the total As can be assessed as inorganic form [63]. The findings of the present study were in the acceptable range (10 −6 to 10 −4 ) compared with Okogwu et al [116], except for Cr which surpassed the CR limits. Again, in the Persian Gulf, consumers at the threshold limit for As were in concern of carcinogenic risk [117].…”

Section: Discussioncontrasting

confidence: 39%

Bioaccumulation of heavy metals in some commercially important fishes from a tropical river estuary suggests higher potential health risk in children than adults

et al. 2019

View full text Add to dashboard Cite

The Karnaphuli River estuary, located in southeast coast of Bangladesh, is largely exposed to heavy metal contamination as it receives a huge amount of untreated industrial effluents from the Chottagram City. This study aimed to assess the concentrations of five heavy metals (As, Pb, Cd, Cr and Cu) and their bioaccumulation status in six commercially important fishes, and also to evaluate the potential human health risk for local consumers. The hierarchy of the measured concentration level (mg/kg) of the metals was as follows: Pb (13.88) > Cu (12.10) > As (4.89) > Cr (3.36) > Cd (0.39). The Fulton’s condition factor denoted that fishes were in better ‘condition’ and most of the species were in positive allometric growth. The bioaccumulation factors (BAFs) of the contaminants observed in the species were in the following orders: Cu (1971.42) > As (1042.93) > Pb (913.66) > Cr (864.99) > Cd (252.03), and among the specimens, demersal fish, Apocryptes bato appeared to be the most bioaccumulative organism. Estimated daily intake (EDI), target hazard quotient (THQ), hazard index (HI) and carcinogenic risk (CR) assessed for potential human health risk implications suggest that the values were within the acceptable threshold for both adults and children. However, calculated CR values indicated that both age groups were not far from the risk, and HI values demonstrated that children were nearly 6 times more susceptible to non-carcinogenic and carcinogenic health effects than adults.

show abstract

Section: Discussioncontrasting

confidence: 39%

Bioaccumulation of heavy metals in some commercially important fishes from a tropical river estuary suggests higher potential health risk in children than adults

et al. 2019

View full text Add to dashboard Cite

show abstract

“…The inorganic state of As is lethal than organic one [8, 111] and only 10% of total As can be assessed as inorganic form [72]. Present study was compared to [112] which found the carcinogenic risk value was in acceptable range (10 −6 to 10 −4 ), except for the metal of Cr which surpassed the CR limits. The reason was the rapid increase of metal pollution for the last 10 years, that phenomena support the study area.…”

Section: Discussionmentioning

confidence: 95%

Bioaccumulation of heavy metals in commercially important fish species from the tropical river estuary suggests higher potential child health risk than adults

Ahmed

Sultana

Habib

et al. 2019

Preprint

View full text Add to dashboard Cite

The Karnaphuli, a major river of Bangladesh, located off the coast of Chittagong in the Bay of Bengal is largely exposed to the heavy metal pollutants, which may be toxic to humans and aquatic fauna. The estuary is a striking example of a site where human pressure and ecological values collide with each other. In spite of being a major supplier of fish food for local community, there has been no study carried out to date to assess the potential human health risk due to heavy metal contamination in the fish species from this estuary. Therefore, the aim of present study was to assess bioaccumulation status and the potential human health risk evaluation for local consumers. Six commercially important fish species, Apocryptes bato, Pampus chinensis, Hyporhamphus limbatus, Liza parsia, Mugil cephalus, and Tenualosa toil from the Karnaphuli River estuary were collected to analyze heavy metals concentration level. Heavy metals As, Pb, Cd, Cr and Cu were detected from the samples using inductively coupled plasma mass spectrometry (Model: ELAN9000, Perkin-Elmer, Germany). The hierarchy of the measured concentration level of the metals was as follows: Pb (mean: 13.88, range: 3.19 - 6.19) > Cu (mean: 12.10, range: 10.27 - 16.41) > As (mean: 4.89, range: 3.19 – 6.19) > Cr (mean: 3.36, range: 2.46 – 4.17) > Cd (mean: 0.39, range: 0.21 - 0.74). The Fulton’s condition factor denoted that organisms were particularly in better ‘condition’ and most of the species were in positive allometric growth. The Bioaccumulation factors (BAFs) observed in the species of the contaminants were organized in the following ranks: Cu (1971.42) > As (1042.93) > Pb (913.66) > Cr (864.99) > Cd (252.03), and among all the specimens, demersal fish, A. bato corresponded to the maximum bio-accumulative organism. Estimated daily intake (EDI), target hazard quotient (THQ) and carcinogenic risk (CR) assessed for human health risk implications suggest that the values are within the acceptable threshold for all sorts of consumers. Hence none of them would experience non-carcinogenic and carcinogenic health effect for the ingestion of the fishes. However, children are shown to be largely susceptible than adults to non-carcinogenic and carcinogenic health effect due to the consumption of fish. Therefore, an appropriate guidlines and robust management measures needed to be taken to restore the estuarine health condition for greater benefit of the quality of fish products for local consumption.Graphical abstract

show abstract

“…The concentrations of Pb (0.09+0.002) and Cr (0.05+0.002) in the untreated water were above WHO (2017) permissible standards. Daily intake of heavy metals such as chromium (Cr) and lead (Pb) could adversely affect the blood, nervous system, kidney, intelligent quotient of children, immune system, cholesterol metabolism and hormonal balance, and increase risk of cancer (Jaishankar et al 2014;Okogwu et al 2019). Heavy metals could also impair antioxidant activities in living cells, leading to accumulation of reactive oxygen and nitrogen species and consequent oxidative damage (Rehman et al 2018).…”

Section: Resultsmentioning

confidence: 99%

“…The samples for heavy metals analyses were preserved with 10 mL analytical grade 1:1 nitric acid:deionized water. The concentration of heavy metals (Cr, Cu, Pb, Fe and Mn) in the water was determined using atomic absorption spectrometric (AAS) method after digestion as described in Okogwu et al (2019).…”

Section: Evaluation Of the Efficiency Of The Treatment Systemmentioning

confidence: 99%

“…Given this significant contribution to water supply, prioritizing self-supply in integrated water management is key to sustainable safe water availability in Africa. However, self-supply could expose consumers to health risks (Edokpayi et al 2018;Silva et al 2020), as previous studies have shown that sources are often contaminated with disease causing pathogens, heavy metals and hardness causing carbonates (Okogbue & Ukpai 2013;Ngele et al 2014;Nwonumara et al 2019;Okogwu et al 2019;Lapworth et al 2020). Although self-supply improves access to drinking water, it does not necessarily guarantee access to safe drinking water, resulting in the persistence of the health challenges associated with poor water access.…”

Section: Graphical Abstract Introductionmentioning

confidence: 99%

See 1 more Smart Citation

An efficient low-cost–low-technology whole-household water collection and treatment system

2021

Self Cite

View full text Add to dashboard Cite

Most residents in developing countries suffer severe water shortage and often resort to self-supply. Unfortunately, some self-supply water sources contain disease-causing biological and chemical contaminants and require point-of-use (POU) treatment. However, recontamination and persistence of chemical contaminants occur, which defeats the aim of POU. This study aims to develop an affordable low technology system that effectively treats whole-house water sourced from borehole and rain without recontamination. Raw borehole water (RBW) was treated with KAl(SO4)2.12H2O (8.10 mg/L), Ca(OH)2 (68.21 mg/L) and NaOCl (1.875 mg/L) in two separate tanks and thereafter filtered through 5-micron and 0.5-micron carbon filters, and reverse osmosis system. The results showed that heterotrophic plate count (2,700 CFU/mL) and total coliform (378.00±21.25 MPN/100 mL) in RBW were reduce to zero, and total hardness was reduced by >83% after treatment and there was no recontamination. Chromium (0.05±0.002 mg/L), Cu (0.04±0.001 mg/L), Pb (0.09±0.001 mg/L), Fe (0.26±0.005 mg/L) and Mn (0.2±0.001 mg/L) in the RBW were reduced below detectable limits after treatment. The annual per capita cost of water treatment was estimated at N4,744.44 ($9.32) at per capita consumption of 100 L/day. Our technology shows exceptional promises in providing affordable and safe water to the entire household throughout the year.

show abstract

Evaluating Heavy Metals Pollution and Exposure Risk Through the Consumption of Four Commercially Important Fish Species and Water from Cross River Ecosystem, Nigeria

Cited by 30 publications

References 18 publications

Bioaccumulation of heavy metals in some commercially important fishes from a tropical river estuary suggests higher potential health risk in children than adults

Bioaccumulation of heavy metals in some commercially important fishes from a tropical river estuary suggests higher potential health risk in children than adults

Bioaccumulation of heavy metals in commercially important fish species from the tropical river estuary suggests higher potential child health risk than adults

An efficient low-cost–low-technology whole-household water collection and treatment system

Contact Info

Product

Resources

About