Chromium Levels Research Articles

Assessment of Levels of Selected Heavy Metals in Borehole Water in Zuru Metropolis, Kebbi State Nigeria

This paper assesses the concentrations of specific heavy metals in borehole water within Zuru Metropolis, Kebbi State. Utilizing rigorous sampling and analytical methods, the study aims to provide insights into the potential health risks associated with heavy metal exposure in the local water supply. Twenty different borehole water samples were assessed for Zn, Pb, Hg, Mn, Cr and Cd levels (mg/l). The results revealed that only few boreholes water samples had concentration levels of heavy metals that are not within WHO recommended levels. While chromium and cadmium levels are below detection limits .The findings contribute to the understanding of water quality in the region, offering valuable information for public health interventions and water management strategies.

An Effective Sol-Gel-Functionalized Polyurethane Foams Solid Platform Packed Minicolumns for Complete Extraction of Chromium (VI) from Water: Kinetic, Sorption Isotherms, Thermodynamic Study, and Analytical Utility.

In the modern era, sol-gel plays a key role in the progress of a new generation of dispersive solid-phase microextractors (d-µ SPMEs) for the removal of organic and inorganic pollutants in complex matrices. Thus, the current study reports the use of sol-gel-functionalized polyurethane foams (PUFs) as a novel solid platform for complete extraction of chromium (VI) species from aqueous media. The planned protocol was based upon the complete extraction of the formed binary complex ion associates between the protonated ether and/or urethane groups of PUFs and chlorochromate anion [CrO3Cl]- aq in aqueous HCl (≥1M) medium in addition to H-bonding and the electrostatic π-π interaction that resulted between the CrO3Cl- and the silanol group (Si/ZrO2, Si-O-Zr) and siloxane (Si-O-Si) groups of the sol-gel. The impact of the analytical parameters (solution pH, natural mineral acids, shaking time, temperature, and chromium (VI) concentrations) was critically studied. At the optimal conditions, the uptake capacity of the established extractor (9.9 mg·g-1) was in agreement with the Langmuir adsorption capacity (12.08 mg·g-1) of the monolayer. The sorption data fitted well with the pseudo first-order kinetic model (R 2 = 0.9961) with an overall rate constant (k 1) of 0.081 min-1 and an equilibrium capacity (q e ) of 8.6 mg·g-1, which is in a good agreement with the experimental value (9.9 mg·g-1). The sorption of the oxyion [CrO3Cl]- aq onto the solid sorbent is an endothermic and spontaneous process as reflected from the values of ΔH (6.99 kJ·mol-1) and ΔG (-8.14 kJ·mol-1 at 293 K), respectively. The ΔS value (15.13 kJ·mol-1·K-1) reflects that the [CrO3Cl]- aq retention onto the sol-gel-treated PUFs sorbent proceeded in a more unplanned fashion. Sol-gel-treated PUFs sorbent-packed minicolumns were successfully used for the complete removal of trace levels of chromium (VI) species from water samples. Sorbed chromium (VI) species were recovered with NaOH (0.5 M) and analysed by spectrophotometry, which supports the utility of the sol-gel-treated PUFs as a low-cost solid extractor for water treatment.

Determination of the level of chromium (III) and comparison of chemical precipitating agents to recover and reuse it from tannery waste water

Most tannery wastes are discharged into the natural environment without any treatment system and pose a potential negative impact on living things due to their high organic loading and chromium content. In this study, a comparison of chemical precipitating agents to recover and reuse chromium (III) from tannery waste water was done. The study was conducted by performing physicochemical characterization and chemical precipitation. The Cr concentration was determined using the flame atomic absorption spectroscopy (FAAS) method. Statistical analysis was performed using the SPSS program through one-way analysis of variance (ANOVA). In terms of sludge volume, magnesium oxide produced 25%, calcium hydroxide 31%, and sodium hydroxide 44%. The findings have implications for global sustainability, as the use of magnesium oxide as a precipitating agent results in a smaller sludge volume and potentially less environmental impact.

Development of an innovative optical sensor to detect extremely low levels of chromium in real samples using colorimetric methods

The investigation focused on a methodology for concentrating and analyzing Cr(vi) in aqueous samples.

Kualitas Air Sumur Dekat SPBU Rendani Kelurahan Wosi Kecamatan Manokwari Barat Kabupaten Manokwari Provinsi Papua Barat

Wells are a groundwater source that is widely used by Indonesian citizens for sanitation and hygiene purposes. Well water quality is influenced by internal factors, namely the condition of the well itself, and external factors, namely the environment around the well. This research aims to analyze the quality of well water near the Rendani gas station, Wosi Village, West Manokwari District, Manokwari Regency, West Papua Province and compare it with the necessary water quality standards. In Indonesia, to guarantee the suitability of well water, water quality standards are stipulated in the Regulation of the Minister of Health Republic of Indonesia No. 32 of 2017. The research results show that the TDS, temperature, turbidity, sulfate, nitrate, iron, manganese and pH parameters meet the quality standards, while the chemical parameters nitrite, chromium (VI) and total coliform do not meet the quality standards. Therefore, it is necessary to treat the water to reduce levels of nitrite, chromium (VI) and total coliform before well water is consumed by residents.

Analysis of Heavy Metals Contaminating Water and Fish Species in Kwanar-Are Dam, Katsina State, Nigeria

This work is aimed to determine the quantities of heavy metals in the water, and three different fish species (Bugrus bayad, Tilapia, and synoduntis) present in Kwanar Are Dam. In the adjacent villages, the dam provides the main water supply for domestic uses, agriculture, fishing, and drinking. Water and fish samples were examined using an Atomic Absorption Spectrophotometer (AAS) to measure the levels of heavy metals. The water sample tested positive for Cd 0.183 mg/l, Cu 0.286 mg/l, Cr 0.233 mg/l, Mn 0.081 mg/l, Ni 0.179 mg/l, Pb 0.166 mg/l, and Zn 0.145 mg/l, according to the results. Cu, Mn, and Ni were below the World Health Organization (WHO) recommended levels. However, Cd, Cr, Pb, and Zn exceeded these limits. The levels of heavy metals in the fish samples ranged from 0.275 to 0.581 mg/kg for Cadmium, 0.520 to 0.837 mg/kg for Copper, 0.205 to 0.512 mg/kg for Nickel, 0.205 to 0.512 mg/kg for Lead, and 0.333 to 0.611 mg/kg for Tilapia, Bugrus, and Synoduntis fish, respectively. Chromium, Lead, Cadmium, Nickel, Zinc, and Manganese levels were lower than copper concentrations. Manganese and nickel concentrations in the fish exceeded what the WHO considered safe. The results of this study show that heavy metals have accumulated in the fish species that live in the Kwanar Are Dam, proving that the dam is contaminated. While some heavy metals in the water and fish samples were within the World Health Organization (WHO)'s (recommended limits), others, including Cd, Cr, Pb, and Zn, were over these levels. This suggests a possible health danger for the locals who depend on the dam as their main water source for daily activities.

Standardization of Hibiscus rosa-sinensis Flower by HPTLC, HPLC and AAS

Hibiscus rosa-sinesis, a well-known flowering plant in India, is used to worship Lord Ganesha. It is a member of the Malvaceae family. It is used in traditional medicine in many tropical countries to treat wounds, inflammation, fever, diabetes, infections, hair loss, and gastric ulcers. Therapeutic benefits of Hibiscus rosa-sinesis are attributed to flavonoids, tannins, terpenoids, saponins, and alkaloids. Hibiscus rosa-sinesis flowers are a good source of flavonoids, which are important components of herbal and Ayurvedic preparations. The goal of this study was to standardize the flower extract through qualitative phytochemical screening and quantitative HPTLC analysis of quercetin, an active biomarker. The result of the HPTLC analysis was compared to those obtained using HPLC. HPTLC found that the extract contained 0.33% quercetin, while HPLC found that it contained 0.37% quercetin. Further, heavy metals and trace elements were measured using atomic absorption spectroscopy (AAS). Results showed that cadmium, lead, arsenic, copper, chromium, and mercury levels (in ppm±SEM) were within acceptable limits: cadmium (0.018±0.050), lead (0.630±0.025), arsenic (0.041±0.014), copper (2.605±0.045), chromium (0.450±0.025), and mercury (0.023±0.006). This method allows standardization of plant material for raw material and finished product testing, ensuring better efficacy and safety.

Heavy metals removal from industrial wastewater using bio-adsorbent materials based on agricultural solid wastes through batch and continuous flow mechanisms

The objectives of this study were to design a biological treatment unit using agricultural residues (rice husk, plum leaves, banana peels, and green bean peels) as agricultural solid waste-based bio-adsorbents for heavy metals removal from industrial wastewater at El-Menoufia Governorate, Egypt. A batch and continuous flow prototype treatment units were manufactured for industrial wastewater treatment in accordance with the types of heavy metals that exist in the industrial region. The findings of the batch flow mechanism demonstrated that chromium had the best removal efficiency (RECr) ranged from 96 % to 99.5 %, followed by REPb from 86.79 % to 95.90 %. The lowest RE was detected with retention time 15 min, while the highest RE values were recorded at 45 min. The continuous flow results using both the Maskoub cartridge, and the Pinpoint cartridge showed levels of lead that varied between 0.042 and 0.041 mg L−1, respectively, with a REPb ranged from 97.89 % to 97.94 %, respectively, while cadmium levels are 0.002 mg L−1 for both cartridges with a RECd of 99.42 %, chromium levels were recorded as 0.003 and 0.002 mg L−1, respectively, with a RECr of 8.99 % to 99.33 %. It was found that all heavy metals levels after treatment were lower than standards required by international organizations, which supports the research outcomes for the application of the treatment unit in many industries, in addition to the economic feasibility of applying these units, where the total costs does not exceed 1226.86 US$ y−1 for a treatment unit with a discharge 1 m3 h−1.

Metal toxin threat in wildland fires determined by geology and fire severity

Accentuated by climate change, catastrophic wildfires are a growing, distributed global public health risk from inhalation of smoke and dust. Underrecognized, however, are the health threats arising from fire-altered toxic metals natural to soils and plants. Here, we demonstrate that high temperatures during California wildfires catalyzed widespread transformation of chromium to its carcinogenic form in soil and ash, as hexavalent chromium, particularly in areas with metal-rich geologies (e.g., serpentinite). In wildfire ash, we observed dangerous levels (327-13,100 µg kg−1) of reactive hexavalent chromium in wind-dispersible particulates. Relatively dry post-fire weather contributed to the persistence of elevated hexavalent chromium in surficial soil layers for up to ten months post-fire. The geographic distribution of metal-rich soils and fire incidents illustrate the broad global threat of wildfire smoke- and dust-born metals to populations. Our findings provide new insights into why wildfire smoke exposure appears to be more hazardous to humans than pollution from other sources.

Bioaccumulation of Some Metals and Metalloids in Laughing Gulls (Leucophaeus atricilla): Increases in Mercury and Decreases in Selenium from 2019 to 2022/2023.

The elements in blood normally reflect the levels in prey, indicating a recent exposure. Laughing gulls (Leucophaes atricilla) eat mainly horseshoe crab eggs (Limulus polyphemus) in the spring in Delaware Bay, New Jersey. The levels of arsenic (As), cadmium (Cd), chromium (Cr), lead (Pb), mercury (Hg), and selenium (Se) in the blood of laughing gulls foraging on crab eggs were examined in Delaware Bay to provide information on a species that is normally a generalist, and to determine if the levels of these elements were similar in 2019 and 2022/2023, were intercorrelated, and were related to those in crab eggs. Hg increased from 2019 (136 ± 31 ng/g) to 2022/2023 (473 ± 75 ng/g), while Cd and Se decreased. There were some significant correlations among elements and a close relationship between the element levels in blood and those in crab eggs collected in the same month (except for As). The levels differed between laughing gulls and three species of shorebirds for As and Cd. The elements in the blood of gulls and shorebirds should be similar because they eat mainly the same eggs in the same places. A significant proportion of laughing gull blood samples had levels of Hg and Se that were above the levels associated with adverse effects, which requires further examination.

Heavy metal baselines in cyprinidae of the Han River: a decade-long study on bioaccumulation trends and species-specific sensitivities

Despite numerous urban pollution sources, research on aquatic species bioaccumulation in the Han River is scarce. In this longitudinal study, we assessed baseline heavy metal (HM) concentrations in Cyprinidae, a major freshwater fish family in the Han River. Specifically, were evaluated copper (Cu), total mercury (THg), cadmium (Cd), lead (Pb), and chromium (Cr) levels in the muscle of common carp, crucian carp, and barbel steed. Common carp had the highest HM accumulation, with baseline concentrations of Cu, THg, Cd, Pb, and Cr at 0.877, 0.060, 0.003, 0.032, and 0.178 mg/kg, respectively. Larger fish exhibited greater bioaccumulation, with THg levels significantly correlated with fish length (correlation coefficients: 0.57 (p < 0.05)–0.74 (p < 0.001)). Notably, Cr accumulated more extensively in fish muscle than Pb, and the metal selectivity index (MSI) of THg in barbel steed was 2–3 times higher than in other fish species. The baseline concentrations determined in this study can serve as identifiers of the initial point of abnormal HM bioaccumulation in fish and provide foundational data for future long- or short-term fish monitoring.

Seagrass as a Bioindicator for Heavy Metal Pollution in Semi-Enclosed Marine Ecosystems

This study delves into utilizing Seagrass as a bioindicator for heavy metal detection in semi-enclosed marine ecosystems, with a specific focus on the Jordanian coast of the Gulf of Aqaba. The research evaluates the relationship between human activities and the responses of marine organisms, employing the seagrass species Halophila stipulacea as a key subject. This research examines the ability of seagrass to sense and respond to environmental changes, particularly in terms of trace metal accumulation. These accumulations serve as indicators of the marine environment's health and the extent of human impact. Observations revealed differences in trace metal concentrations across three distinct habitats. Notably, varying levels of Cadmium (Cd) and Chromium (Cr) were found in seagrass leaves, while Copper (Cu) and Iron (Fe) were more prevalent in roots. Increased concentrations of Malondialdehyde (MDA), a marker of environmental stress as indicated by lipid peroxidation (LPO), point to a potential link between human activities, such as boating, and the health of seagrass. These findings underscore the complex interactions between marine biology, environmental management, and the innate abilities of organisms to perceive and adapt to changes in their environment. The study bridges the gap in understanding organismal responses to environmental changes and emphasizes the need for ongoing research. Such research is crucial to comprehend the broader effects of environmental shifts on marine life. By continuously monitoring trace metal levels and understanding the responses of seagrass over time, this study lays the groundwork for innovative conservation and management strategies. These strategies are aimed at protecting vital marine environments from the growing impacts of human disturbances.

Seasonal Variations in Heavy Metal Content of Periwinkle Samples obtained from Oil Producing Communities within Bayelsa State, Nigeria

The effects of seasonal variations on the heavy metal content of periwinkle (Littorina littorea) were investigated. Samples were obtained from five stations within the oil producing communities of Bayelsa State, Nigeria. The standard digestion method was used to determine the levels of zinc, lead, nickel, copper, cadmium and chromium with the aid of the atomic absorption spectrophotometer (AAS). (Cadmium (0.216 – 0.727 ppm) and chromium (0.003 – 0.110 ppm) were significantly higher. Zinc, lead, nickel and copper were below the minimum permissible limits. Results obtained for chromium was significant at p(0.05) for the Pearson correlation coefficient. Oil production increases the concentration of heavy metals in water causing harmful to living and non-living resources. Further studies within the study area will assist in effective monitoring of the environment for sustainable development.

Assessment of Levels of Selected Heavy Metals in Borehole Water in Zuru Metropolis, Kebbi State Nigeria

This paper assesses certain heavy metal concentrations in borehole water within Zuru Metropolis, Kebbi State. Utilizing rigorous sampling and analytical methods, the study aims to provide insights into the potential health risks associated with heavy metal exposure in the local water supply. Twenty different borehole water samples were assessed for Zn, Pb, Hg, Mn, Cr and Cd levels (mg/l). The results revealed that only few boreholes water samples had concentration levels of heavy metals that are not within WHO recommended levels. While chromium and cadmium levels are below detection limits .The findings contribute to the understanding of water quality in the region, offering valuable information for public health interventions and water management strategies.

Metal and pesticide residues levels accumulated in leafy vegetables and several fragrant medicinal plants in Baghdad Governorate / Iraq

The levels of some heavy metals (cadmium, lead, chromium) and pesticide residues (Malathion, Dimethoate, Profernofoes, PrimiohosMe) were estimated in some aromatic medicinal plants (chamomile, anise seeds, coriander, fennel) and leafy vegetables (cabbage, celery, grape leaves, and coriander, Mint, lettuce, spinach, and watercress) are commonly used and collected frm various markets. Organophosphorus pesticides have also been detected in some aromatic medicinal plants and leafy vegetables. Where, chamomile samples showed only Malathion, while in coriander malathion is 0.86 and Dimethoate have been detected in Anise seeds, profernofoes in chamomile were predominant, and leafy vegetables have also been detected some Organophosphorus pesticides in green mint Malathion, profernofoes is dominant, the findings showed that some heavy metals were present in some of the samples that were collected. Lead and chromium levels, as well as varying amounts of cadmium and chromium, were found in grape leaves in the majority of the samples that were examined. Samples of chamomile flowers had the greatest average amounts of cadmium and chromium, whereas samples of anise seeds had the highest levels of lead.

Analysis of Groundwater Quality in Rental Flats use Physical and Chemical Parameters

The purpose of this study was to determine the physical and chemical quality of the groundwater in the Jerakah flats area and to determine the feasibility of the water as drinking water. This research was physically carried out by analyzing groundwater samples from the rented flats of the Jerakah sub-district based on the physical parameters of the air, including taste, color, smell, temperature, turbidity, and dissolved solids (TDS) as well as chemical parameters consisting of the degree of acidity. (pH), Nitrate Content (NO3-), Nitrite (NO2-), Hardness (CaCO3), Iron (Fe), Lead (Pb), Manganese (Mn), Zinc (Zn), Sulfate (SO42-), Cadmium (Cd), and Chromium (Cr). The results showed that the groundwater in the Jerakah flats had a normal pH, colorless, tasteless, odorless, low turbidity, and high dissolved solids (TDS). The levels of iron (Fe), manganese (Mn), chromium (Cr), zinc (Zn), cadmium (Cd), lead (Pb), and hardness are below the maximum hygienic sanitary limits. Manganese (Mn), Cadmium (Mn), Lead (Pb) levels exceed the maximum limit for drinking water. The groundwater in the Jerakah flat is suitable for use for hygienic sanitation, such as bathing and washing, but not suitable for drinking.

Digestibility of nutrients in bulls raised for meat, depending on the level of chromium in the diet

The article presents data on the digestibility of nutrients when various doses of chromium picolinate are included in the diet of bulls. The second group of animals receiving chromium picolinate at a dose of 1.739 mg/kg of dry matter feed was characterized by better consumption characteristics of crude protein, crude fiber and nitrogen-free extractive fractions, as well as increased digestibility coefficients, which was confirmed by stimulation of protein, carbohydrate and lipid metabolism processes. Mineral metabolism was characterized by an increase in magnesium by 12.5%, phosphorus by 26.4-34.8% with a slight change in calcium (0.7-1.7%). Thus, the dosage of chromium picolinate (1.739 mg/kg of dry matter) is optimal for the nutrients’ metabolism in bulls raised for meat.

Spatial distribution, ecological risk and health risk assessment of heavy metals in agricultural soil from Ankang basin, Shaanxi Province

In order to assess the heavy metal pollution features, ecological dangers, and health risk status posed to human beings by soils in the Ankang Basin, a study was conducted. This involved the collection of 38 surface soil samples, followed by the determination of elemental levels of arsenic, mercury, copper, cadmium, lead, chromium, nickel, and zinc. The concentrations of arsenic, mercury, copper, cadmium, lead, chromium, nickel, and zinc were quantified through the collection of 38 surface soil samples. The data obtained from the study was subjected to analysis and evaluation utilizing various academic methodologies, including the geo-accumulation index method, potential ecological risk assessment method, human health risk assessment model, and Monte Carlo simulation method. The findings indicated that the concentrations of the eight heavy metals in the soil above the background levels, with only Cadmium (Cd) marginally surpassing the threshold set for controlling soil pollution risks. The ground accumulation index revealed a higher degree of soil pollution with mercury, cadmium, copper, and zinc components. According to the possible ecological risk index, the presence of mercury and cadmium elements poses significant ecological hazards. The geographical distribution analysis suggests that these risks mostly stem from the combined impacts of human activities and the topographical and geomorphological characteristics of the river valley. The findings of the human health risk assessment indicated that the non-carcinogenic risk fell within acceptable limits. Additionally, it was observed that the carcinogenic risk associated with arsenic, mercury, cadmium, and nickel was comparatively greater for children as compared to adults. The results of the Monte Carlo simulations indicate that the non-carcinogenic hazards have a negligible effect on human health. However, it was seen that arsenic and nickel have a greater likelihood of presenting a substantial carcinogenic risk to humans, particularly in relation to the pediatric population, hence exerting a more pronounced impact on their health. In general, it is observed that conventional deterministic risk assessments tend to overstate the potential health risks associated with a given situation. Conversely, the utilization of Monte Carlo simulations has been found to effectively mitigate uncertainties in health risk assessments. It has been observed that children exhibit a higher vulnerability to both carcinogenic and non-carcinogenic health impacts resulting from exposure to heavy metals present in soil, in comparison to adults. It is recommended that residents prioritize the surveillance of soil heavy metals in relation to potential impacts on human health.

Translated article] Evolution of chromium and cobalt serum levels after the use of a modular neck stem in primary total hip arthroplasty

Introduction and objectivesModular neck primary stems were introduced with the theoretical advantage of restoring the hip anatomy more precisely. However, the presence of a second junction has been associated with increased corrosion and release of metal debris. The objective of our study is to quantify of chromium and cobalt serum values, and to analyse their temporal evolution during five years. Material and methodsWe present a prospective series of 61 patients who underwent primary total hip arthroplasty by implantation of the H MAX-M® stem (Limacorporate, San Daniele, Italy). Serum chromium and cobalt determinations were performed at six months, two years and five years. ResultsOur series shows a progressive elevation in chromium levels with a significant difference between chromium values at six months (0.35±0.18) and five years (0.52±0.36), p=.01. Regarding cobalt, a statistically significant elevation is observed between six months and two years and a subsequent stabilisation of values between two and five years, with a cobalt mean at six months (1.17±0.8) significantly lower than at two (2.63±1.76) and five years (2.84±2.1), p=.001. ConclusionElevated serum cobalt levels have been observed in patients who underwent modular neck stem implantation. The results obtained in this study have limited the use of stems with a modular neck in our clinical practice.

Evaluation of Salivary Nickel and Chromium Level of Iraqi Sample Treated with Fixed Orthodontic Appliances

As orthodontic appliances consider one of the esthetic treatment in dentistry, which contain variable amount of Nickel and Chromium in different part of the orthodontic appliance that may release in saliva and affect patient's health, the aim of the study was conducted to evaluate the nickel and chrome concentration level in saliva for orthodontic patients who are treated with nitinol and stainless steel arch wire and compare this concentration with that of control group. Three groups have been studied 1st group and 2nd experimental includes 17 patients with nitinol arch wire and other 17 patients with stainless steel arch wire. The 3rd group was control group includes 17 patients without orthodontic appliance, stimulated saliva collected in sterile screw capped bottle, and kept at (-20 C˚) then allowed to defrost at room temperature, then the concentration of salivary ions of nickel and chromium was measured by using atomic absorption spectrophotometer. Descriptive and Inferential statistical analysis has been used. Revealed significant difference in Cr and Ni concentration among three groups. This study proved that with nitinol arch wire the level of Cr and Ni increase in saliva more than that of control and stainless steel group.