Heavy Metals Contamination in Water and Their Hazardous Effect on Human Health-A Review

Sankhla, Mahipal Singh; Kumari, Mayuri; Nandan, Manisha; Kumar, Rajeev; Agrawal, Prashant

doi:10.2139/ssrn.3428216

Cited by 43 publications

(34 citation statements)

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“…On the other hand, water samples from GS, LDMT, DT showed low mean concentrations for Fe and which is in agreement with a recent study in Nigeria [25]. Even at low concentration heavy metals impact negatively on living organisms [4]. It is worthy to note that water samples were collected during the dry season.…”

Section: (Mg/lsupporting

confidence: 90%

“…From Table 2, there was a high mean concentration of Pb across locations except in GS where concentration is moderate but the mean concentrations of all sampling locations including GS were above the (WHO 2011) guideline standard of 0.01mg/l for water quality. The presence of traces of Pb in surface water constitute a growing concern [10] because human exposure to high Pb levels have considerable cumulative effects that would result in fatal health consequences [4]. The average concentration values were high for Pb obtained in this study but are lower than the peak values obtained in another study in Nigeria [25].…”

Section: (Mg/lcontrasting

confidence: 52%

“…However, the issue of water quality is more severe in the areas where excessive mining operations and related processes are present [3]. Report from studies have shown that various forms of contaminants are continually introduced into water bodies mainly due to mining activities [4][5][6]. This consequently would have the propensity of severe ecotoxicological threats to human and other living organisms that rely on water bodies [7,8].…”

Section: Introductionmentioning

confidence: 99%

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Impact of Tailings on Surrounding Streams at a Mining Area in Sierra Leone

Sheriff¹

2018

EARTH

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Access to clean water and sanitation is the centerpiece of Africa water vision 2025 and Goal six (6) of the 2030 UN agenda for Sustainable Development. Considering the current national WASH regulatory structures in Sierra Leone, meeting these targets enshrined in the policy documents would be a critical challenge for the government. The overarching objectives sought by the study were to determine the available composition of physio-chemical parameters and evaluate impact of mine tailings on nearby water bodies within the operational areas of Sierra Rutile Mining Company Limited. Twenty-four (24) water samples obtained from six (6) streams were tested for seventeen (17) physical and chemical parameters. About 30% of the indicators were noted to be above the permissible limit of water quality standard in almost all of the sampling sites. A pattern of decrease concentration downstream for Zn, Pb and Cu was observed but those at the tailing points were noted otherwise. The results revealed that mining activities have to an extent negative impact on the local water sources. Consequently, certain indicators were considered to be of public health concern considering their baseline levels. It would be necessary for the company to examine the mechanism of discharge of tailings and strengthen the environmental surveillance within its concessionary areas to enhance sustainability with the ultimate goal to improve environmental performance.

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Section: (Mg/lsupporting

confidence: 90%

Section: (Mg/lcontrasting

confidence: 52%

Section: Introductionmentioning

confidence: 99%

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Impact of Tailings on Surrounding Streams at a Mining Area in Sierra Leone

Sheriff¹

2018

EARTH

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“…Howard et al [29], stated that high concentration of lead in the body can result in permanent damage to the central nervous system and kidney. Sankla et al [30], linked stunted growth, nervous system damage, learning disabilities, crime and antisocial behavior in children to lead toxicity. Edokpayi et al [31], described possible correlation between lead exposure and mental and physical retardation in children under six.…”

Section: Discussionmentioning

confidence: 99%

Human Health Risk Assessment of Trace Metals in Water from Cross River Estuary, Niger Delta, Nigeria

Etuk

Akpakpan

2020

AJOCS

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The aim of this study was to determine the levels of some trace metals in water from Cross River estuary (CRE) and estimate the human health risk associated with water from the estuary via ingestion pathway and dermal contact. The trace metals in water were determined using atomic absorption spectrophotometer and the human health risk assessment of the trace metals was carried out using models stipulated by United States environmental Protection Agency (USEPA). The range for the results in mg/l was as follows: Pb (0.193- 0.632), Cd (0.118 - 1.084), Ni (0.048 -0.632), Fe (0.056 - 0.921), Zn ( 0.063 - 0.242), Cu(0.072 - 0.146). All the investigated metals were above the WHO limit except zinc and copper. The target hazard quotient (THQ) via ingestion pathway for Pb, Cd and Ni were higher than unity. Also, the hazard indices for all the investigated metals in all the study sites were higher than unity. The target hazard quotient and Hazard index via dermal pathway were less than one for all the metal investigated, except Cd at Ebughu. Regular monitoring and minimization of anthropogenic activities resulting in elevated metal concentration is recommended.

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“…COD removal at various processes (O 3 dose = 0.98 mg/ min; Adsorbent dose (AC/RH) = 10 g/3 L; Volume = 3 L; pH = 7.9; t = 60 min; T = 33 ± 2°C). bined processes may be due to the catalytic effect of high surface area activated carbon and availability of adsorption sites due to oxidation of metals in the presence of ozonation [30][31][32].…”

Section: Metals Removalmentioning

confidence: 99%

Combined ozonation and adsorption system for the removal of heavy metals from municipal wastewater: effect of COD removal

Ikhlaq¹,

Aslam²,

Zafar³

et al. 2019

Desalination and Water Treatment

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Heavy metals like copper, chromium, cadmium, lead, and zinc are key contaminants of freshwater reservoirs because of their deadly, non-biodegradable, and persistent nature. The work involves the comparison of various single and combined processes such as ozonation (Ozo), adsorption on activated carbon (AC), adsorption on rice husk (RH), ozonation in the presence of rice husk (Ozo/RH) and ozonation in the presence of activated carbon (Ozo/AC) for the removal of chemical oxygen demand (COD) and heavy metals from the municipal wastewater. Various factors such as adsorbent dose reaction time and synchronizing effect of COD removal on the removal efficiency of heavy metals was studied. The maximum removal of both COD and heavy metals was achieved by ozonation in the presence of activated carbon (Ozo/AC) combined process. The results further reveal that COD removal efficiencies have a positive synchronizing impact on the removal efficiencies of heavy metals. It is therefore concluded that (Ozo/AC) combined process may be used for the removal of heavy metals in wastewater.

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Heavy Metals Contamination in Water and Their Hazardous Effect on Human Health-A Review

Cited by 43 publications

References 0 publications

Impact of Tailings on Surrounding Streams at a Mining Area in Sierra Leone

Impact of Tailings on Surrounding Streams at a Mining Area in Sierra Leone

Human Health Risk Assessment of Trace Metals in Water from Cross River Estuary, Niger Delta, Nigeria

Combined ozonation and adsorption system for the removal of heavy metals from municipal wastewater: effect of COD removal

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