of toxic metals concentration, seasonal variation and

Overview

This source page is a mechanical bulk-ingest record for a PDF in the methylmercury infant-formula research pull. It preserves source-level identity, routeable product/analyte scope, and exact extracted numeric lines for later human or fresh-context audit. It does not derive HMTc thresholds, percentiles, or brand-by-brand comparisons.

Key numbers

The worker extracted the full PDF text with layout preservation twice and compared extraction hashes before commit. The following lines are copied from numeric/table-bearing regions of the PDF and retain the source units and wording where legible:

Olalekan Morufu Raimi,1,2 Olawale Henry
anemia, kidney failure, immunosuppression, neurological impairments, gastrointestinal as Gabriel Salako4
health effects. These diseases types remain associated to high amounts of heavy metal 2
procedures (2012). To prevent degradation of the organic substances, all obtained samples
parameters were significantly lower in site 9 compared with that obtained in other sites Community Medicine, Environmental Health Unit, Faculty of
(p<0.05) with the exemptions of temperature, DO, BOD, COD, acidity, TH, TDS, K, Mg, Clinical Sciences, Niger Delta University, Wilberforce Island,
Zn, Mn, Cd, Pb, Cu, Cr, NH3, NO2, NO3, Ni though slightly lower in most cases in site 9 were Bayelsa State, Nigeria, Email
not significantly different (p>0.05) and both alkalinity and SO4 which were significantly
higher in site 9 than site 1 (p<0.05). Result obtained during dry season reveals that there is
no remarkable difference in pH, acidity, Pb and Ni between the nine sites (p>0.05) while
other water quality parameters were significantly lower in site 9 than other sites excluding
Cl and Mg which were both significantly higher in site 9 than site 8 (p<0.05).
I. Many tropical countries are suffering from severe groundwater in site 9 compared with that obtained in other sites.
to provide clean and accessible water to citizens, especially in IV. Result reveals that groundwater at location 3, 4 and 7 were
Submit Manuscript | http://medcraveonline.com Int J Hydro. 2022;6(1):23‒42. 23
©2022 Raimi et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which
human health risk in drinking water quality in areas surrounding crude oil exploration facilities in rivers ©2022 Raimi et al. 24
will only get worse and faster unless there is a coordinated origins receiving less attention.25 The absence of safe water is linked
organizations capable of bringing meaningful change. on productivity. Only around a quarter (24%) of the indigenous
drinkable water. However, several studies9,10 have shown and document
VII. Groundwater pollution has a financial cost that runs into billions reported as normal industry practice. For reference, 1 barrel equals 42
of Naira, in addition to the human and environmental effect. gallons or 159 litres in the United States. As a results, Figure 1 below
relocation of sites that are most dangerous (location 3, 4 & 7) as opportunities.
accounts for roughly 56%. About 100 million barrels of oil as well
as 10 billion cubic metres of natural gas are produced daily by the
a significant environmental influence.1 Consequentially, it’s possible
or cultural heritage sites on a local or regional level.2–8 While, the
area plays host to over 100 oil wells, 9 gas flaring sites, an oil and
an area of less than 250 km2.9–14 Niger Delta region has a difficult
high.11,4,12 Water bodies in the Niger Delta have been heavily polluted Figure 1 Sustainability issues in the oil and gas industry Adapted from IPIEA
due to recurring incidence of oil spillage.15 Most micro-populations (2017).
aquatic resources.16 As a result, freshwater resources contamination While a variety of harmful compounds, for example, cadmium,
with over 14,000 individual’s deaths daily.17–23 In spite of the about contaminants have been proven to be harmful to human health.
US$600 billion generated from oil revenue between 1958 and 2007, Exposure to cadmium as well as hydrocarbon (benzene) is classified
infrastructural provision.24 Groundwater is rapidly being exploited for for Research on Cancer. Additionally, groundwater pollution
half (50%) of the potable water supply in Nigeria. Approximately 80 as congenital malformation and have been found to be statistically
percent of homes in Niger Delta rely on this domestic source of water associated with exposure to groundwater pollutions.9,10,4,13 Arsenic,
human health risk in drinking water quality in areas surrounding crude oil exploration facilities in rivers state, Nigeria. Int J Hydro. 2022;6(1):23‒42.
human health risk in drinking water quality in areas surrounding crude oil exploration facilities in rivers ©2022 Raimi et al. 25
in drinking water,27 nonetheless arsenic (As) as well as fluoride (F) accomplishment, together with those associated to poverty eradication
have received the maximum attention owing to their toxicity as well (SDG 1), zero hunger (SDG 2) as well as good health and wellbeing
as widespread distribution.28 The geochemical features of the aquifer (SDG 3), ensure access to clean water and energy, address needs for

Methods (brief)

procedures (2012). To prevent degradation of the organic substances, all obtained samples
water quality parameters in the study region (determine the level of for Sustainable Development offer a framework/roadmap aimed at
samples (water and soil) need to be examined toward determining the
health. Groundwater samples collected from the gas flaring site were
compared to samples collected from another location, a peri-urban
as even months termed dry are frequently not devoid of sporadic Sample collection
monthly temperature hovering around 25 degrees Celsius. The current research inquiry used a sample method similar to that
sections defined by stratified high forest: The vegetation consists of petroleum exploration and exploitation. Water samples were taken
of meters long, as well as epiphytes and parasites that live on other residential use was sampled. The wells range in depth from 10 to 28
only sites where primary forests can remain found include riparian experiment. Furthermore, samples were manually collected from nine
The territory is essentially drained via the Sombreiro on the Groundwater samples were collected once a month from well and
Eastern flanks as well as Orashi on the Western flanks, resulting in borehole across the nine sites. All samples were collected during the
topographic structure and is covered via superficial soil composed of well as lockdown from COVID-19. Night samples were not taken,
to floods, which raises the water level in the water table. Tidal flow Ground water samples were obtained in pre-rinsed 1litre plastic
storage, pre-rinsed ground water samples for trace metal analyses
sandy loam, shifting to sandy clay loam as well as eventually clay in the (BOD) assays, groundwater samples remained obtained in two groups
acidity is caused by the soil’s high Aluminium (Al) concentration.17,59 samples were carefully filled without air trapping and the bottles
attributed to the land’s ongoing agriculture. Organic matter reduces the presence of light in the samples, which was capable of creating

Implications

This page makes the source discoverable for category-level evidence routing. Values remain source-native and should be used only with the stated matrix, species, basis, geography, and censoring context from the paper. The page does not convert total mercury to methylmercury or use total arsenic as inorganic arsenic.

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Verification notes

Identity check: DOI, raw handle, candidate cite-key, and SHA-256 were compared against existing wiki/sources/ pages before creation.
Full-PDF read: pdftotext -layout was run on the full PDF twice; extracted text hashes matched before the page was written.
Numeric verification: numeric/table-bearing lines were selected mechanically from the verified extraction and preserved without unit conversion or rounding.
Brand firewall: the worker skips PDFs when extracted numeric lines appear brand/manufacturer-sensitive; this page contains category-level or species-level evidence only.
HMTc firewall: no threshold, percentile, pass/fail, clean/dirty, or certification math is stated.

Update history

The five most recent substantive edits to this page, classified major (evidence or structure moved), correction (a published value or statement was wrong and has been fixed), or minor (narrative rewritten without changing the underlying evidence). Each description is derived from what the edit did to this page; the linked commit is the authoritative record, routine regeneration passes are excluded, and the full version history lives in git. When DOI minting comes online (see schema docs), each entry below will also link to a version-pinned DataCite DOI.

Commit	Date	Change	Description
3171d06	2026-08-02	major	1 section added
bc84bfc	2026-08-02	major	6 sections added; narrative text revised