Analysis Of Heavy Metal Concentrations Research Articles

Heavy metals distribution and their ecological risk in the surface sediments of Haizhou Bay, China

A comprehensive analysis of heavy metal concentrations, sources, and pollution status was conducted on thirty surface sediment samples collected from Haizhou Bay, China in 2020. The spatial distributions of Cu, Pb, Zn, Cr, Cd, and total organic carbon (TOC) were found to be analogous. Noteworthy, sporadic pollution effects from Cu, Cr, and As were detected, although heavy metal concentrations remained below the probable effect level (PEL). A suite of analytical methods, including Pearson's correlation coefficient, geoaccumulation index, sediment quality guidelines, potential ecological risk index, and principal component analysis, was employed to elucidate the sources and assess the pollution risks. The results indicated that Hg emerged as the predominant heavy metal pollutant in Haizhou Bay sediments, with several stations showing high pollution levels that require attention. Other heavy metals were mainly of natural origin, indicating no significant pollution in the study area.

Evaluating Groundwater Safety: Heavy Metal Contamination of Selected Boreholes across Uyo Metropolis, Akwa Ibom State, Nigeria

Study’s Novelty/Excerpt This study offers a comprehensive analysis of heavy metal concentrations in borehole water within Uyo Metropolis, Akwa Ibom State, highlighting significant public health risks associated with these contaminants. Utilizing Atomic Absorption Spectrophotometry (AAS), the research uniquely identifies iron and nickel concentrations that exceed World Health Organization (WHO) and Nigerian Standard for Drinking Water Quality (NSDWQ) guidelines, with iron levels reaching 0.551 mg/L and nickel levels at 0.298 mg/L. These findings emphasize the urgent need for policy interventions and infrastructure investments to mitigate the pervasive risk to consumers and ensure the safety of water resources. Full Abstract In light of growing concerns about water quality and its effects on public Health, this study offers an in-depth analysis of heavy metal concentrations in selected boreholes water within Uyo Metropolis in Akwa Ibom State. The research also emphasizes the potential health risks associated with these heavy metals, particularly as some have been found to exceed the acceptable drinking water limits set by the World Health Organization (WHO). Borehole water samples from ten strategically selected locations were collected and analyzed for heavy metals using Atomic Absorption Spectrophotometry (AAS) to quantify the concentrations of copper, zinc, iron, chromium, and nickel. The results revealed that all water samples contained iron concentration (0.551 mg/L), surpassing the guidelines set by the World Health Organization (WHO) and Nigerian Standard for Drinking Water Quality (NSDWQ), indicating a pervasive risk to consumers. Additionally, elevated levels of nickel (0.298 mg/L) were detected in several samples, further exacerbating the public health implications. The findings underscore the critical need for policy intervention and infrastructure investment to ensure the safety and sustainability of safe water resources for human use.

A robust, low-temperature, closed-loop anaerobic system for high-solid mixed farm wastes: advancing agricultural waste management solutions in Canada.

This study investigates the effectiveness of low-temperature (20 ± 1 °C) anaerobic digestion (AD) for two organic multiple farm substrate combinations: Set 1 comprising chicken manure (CM), dairy manure (DM), and waste corn silage (CS) and Set 2 comprising CM, DM, pig manure (PM), and CS. Inoculum adaptation steps were carried out using CM and CM+DM for Set 1 and Set 2, respectively. Over three consecutive operating cycles spanning 245 days with increasing organic loads, 4.3 and 2.8 g VS L-1 d-1 for Sets 1 and 2 during Cycles 1 to 5.1 and 4.6 g VS L-1 d-1for Sets 1 and 2 during Cycle 3, a closed-loop two-stage liquid-solid AD system was employed, with performance assessed via stability ratios of short-chain volatile fatty acids and alkalinity. Results demonstrate that mono-digestion of CM with adapted inoculum yielded the highest biogas production of 424 ± 4 L over 77 days, indicating superior performance by Set 1 during Phase I, whereas a similar performance was observed during Phase 2, where Sets 1 and 2 exhibited highest specific methane yields of 0.233 ± 0.028 and 0.262 ± 0.004 L g-1 VSfed, respectively, over 68 days. Analysis of heavy metal concentrations in digestates revealed a significant decrease compared to initial raw substrate concentrations, highlighting their role as nutrients for microbial growth. This study, the first of its kind, highlights the potential of low-temperature AD systems to manage diverse organic residues/byproducts and offers insights into effective performance monitoring without compromising system integrity.

Analysis of heavy metal concentration and its bioaccumulation in Gerres filamentosus (Cuvier, 1829) from Ashtamudi Lake, Kollam, Kerala, South India

Analysis of heavy metal concentration and its bioaccumulation in Gerres filamentosus (Cuvier, 1829) from Ashtamudi Lake, Kollam, Kerala, South India

Analysis of heavy metal concentrations in soil using Kriging technique using remote sensing data

Analysis of heavy metal concentrations in soil using Kriging technique using remote sensing data

Spatio-Temporal Analysis of Heavy Metals Concentration in The Soil for A Selected Sites in Mosul City

Spatio-Temporal Analysis of Heavy Metals Concentration in The Soil for A Selected Sites in Mosul City

Heavy metal concentrations in surface waters of Hurghada and environs, Red Sea Coast, Egypt, and their correlation with sediment distribution

This study investigates the properties and chemistry of surface water in Hurghada and its adjacent areas, with a focus on assessing the potential impact of human activities on water quality by measuring the concentrations of heavy metals in surface water samples. A total of fifty-nine surface water samples were collected and analyzed for various heavy metals, including manganese (Mn), iron (Fe), nickel (Ni), copper (Cu), zinc (Zn), cadmium (Cd), mercury (Hg), and lead (Pb) using the AAS technique.The results indicate that at the Desert Rose Resort transect, the average total concentrations of heavy metals were within the following ranges: Fe (average of 26.96 μg/L), Cu (average of 0.61 μg/L), Zn (average of 6.31 μg/L), and Pb (average of 0.75 μg/L). Conversely, at the Abu-Shaar transect, Ni (0.87 μg/L) and Cd (average of 0.02 μg/L) were the dominant heavy metals, while Mn exhibited the highest mean value (1.80 μg/L) at the El-Samaka Village transect. Notably, Hg was not detected in any of the samples within the study areas.Comparative analysis of heavy metal concentrations in Hurghada's surface waters with data from the Red Sea coast and other global regions reveals that the study areas maintain heavy metal concentrations well below the maximum permissible values for the marine environment. These findings suggest that human activities have not significantly impacted heavy metal levels in the region's surface waters.Additionally, statistical assessments, such as correlation coefficients (r), were employed to explore the relationships between heavy metal concentrations in water and sediment. These relationships provide valuable insights into the dynamic balance of elements within the sediment and their potential direct or indirect transfer into the water.

Analysis of Heavy Metals Concentration and Pollution Index on Water Quality in Labuan Beach Fishery Port Area, Banten

Labuan Coastal Fishing Port (PPP) is an area with great potential for development in the economic and tourism sectors. Apart from being the center of the fishing industry in Pandeglang Regency, PPP Labuan also has beach tourist attractions. Some activities could cause the entry of heavy metals into waters and affect water quality. These activities include ships refuelling, ships exhaust emissions, ships washing and paint spills, as well as beach tourism activities. The pollution index is used to determine the level of pollution in waters. This research aimed to analyze water quality and pollution indices based on the heavy metals content iron (Fe), nickel (Ni), and copper (Cu). Samples were taken from three observation stations, namely the beach tourist area (station 1), the fish auction site (station 2), and the pier (station 3). Analysis of the heavy metals Fe, Ni, Cu was carried out using the Atomic Absorption Spectrophotometer method and the results were compared with Indonesian government reulation, PP No. 82/2001. Pollution index analysis wasusing the pollution index method. The heavy metals content of iron (Fe) ranged from 1.761 – 6.907 mg/L, nickel (Ni) ranged from 0.079 – 0.269 mg/L, and copper (Cu) is < 0.001 mg/L. Based on the pollution index (IP), station 1 was lightly polluted with an IP value of 3.75. At station 2 it was moderately polluted with an IP value of 5.91, and at station 3 it was lightly polluted with a value of 4.2.

Bioconcentration of Plumbum (Lead) and Cadmium on mangrove crab Scylla spp. in mangrove ecosystem Passo Ambon Indonesia

Mangrove crab (Scylla spp.) is one of the potential fishery commodities of Maluku Province, which is in high demand because of delicious and nutritious and has selling and export value. This research conducted on the Passo mangrove ecosystems, in May-July 2021. The aims were to analyze the concentration of heavy metals Pb (lead) and Cd (cadmium) in water, sediment and mangrove crabs; and to analyze bioconcentrations and its pollutant categories. Samples of water, sediment and mangrove crabs were taken and captured in the mangrove ecosystems of Passo (Station 1) and at three substations using the purposive sampling method. The treatment of water samples, sediment and mangrove crabs from nature follows the standards of handling samples for analysis of heavy metal concentrations in each medium. The concentration of heavy metals in each medium was analyzed using an Atomic Absorption Spectrophotometer. The results showed that the value of the concentration of Pb in Passo was still at the detection limit; concentrations in sediments have exceeded the detection limit; and the concentration of mangrove crabmeat has exceeded the detection limit. The value of Cd concentrations in water of Passo was still at the limit detection value; concentrations in sediments have exceeded the detection limit; while concentration on mangrove crabmeat was still relatively low but indicated accumulation. Bioconcentration Factor indicates the accumulation of PB and Cd metals was relatively low (<100).

Comparative Analysis of Heavy Metal Concentrations and Potential Health Risks Across Varied Land-Use Zones in Ado-Ekiti, Southwest Nigeria

Comparative Analysis of Heavy Metal Concentrations and Potential Health Risks Across Varied Land-Use Zones in Ado-Ekiti, Southwest Nigeria

Analysis of Heavy Metals Concentration in Textile Wastewater in Batik Industry Center

The textile industry is the main source of environmental pollution in terms of quality and quantity. It consumes large amounts of water (200 m3/ tonne of products), and around 90% of the quantity is wastewater. Improper disposal of textile wastewater will cause serious environmental problems due to the presence of heavy metals in the waste which will adversely affect aquatic organisms. To analyze, the concentration of heavy metals in textile (batik) wastewater was collected from 15 small, medium, and large-scale textile industry waste disposal centers located at the Batik Industry Center of Kampoeng Batik Laweyan Surakarta, Indonesia August 2019. Standard methods of 22nd Edition 2012 APHA -AWWA-WEF with inductively coupled plasma optical emission spectroscopy (ICP-OES) was used to analyze the concentration of Iron (Fe), Copper (Cu), Chromium (Cr), Cadmium (Cd), Lead (Pb) and Nickel (Ni) in the sample. The results of the analysis showed that from 15 sample locations, several locations had levels of Cu, Pb, Ni, Cr, and Cd below the detection limit, i.e. 2 (&lt;0.01 ppm), 13 (&lt;0.02 ppm), 13 (&lt;0.01 ppm), 15 (&lt;0.01 ppm), and 15 (&lt;0.02 ppm) locations for each metal respectively, while Fe levels were above the detection limit at all locations. The mean levels and number of locations for Fe, Cu, Pb, and Ni were 2.63 ± 5.01 (n = 15), 0.48 ± 0.99 (n = 13), 0.05 ± 0.03 (n = 2) and 0.02 ± 0.00 (n = 2) and the ranges of each metal level were 0.07-19.4 ppm, 0.01-3.73 ppm, 0.02-0.07 ppm, and 0.01-0.02 ppm respectively. Among these heavy metals, the highest concentration was Fe, and all samples had Cr and Pb levels below the detection limit. By comparing the results of this study with the safe limit for industrial wastewater according to Central Java Provincial Regulation No. 5 of 2012, only wastewater originating from two sampling locations can be used for irrigation and aquaculture, namely at locations B2 and B5

Comparative Analysis of Heavy Metals Concentration in Soil and Vegetable (Vernonia amygdalina) Collected from Two Sampling Sites (Farmland and Dumpsite) and the Effect on Plant DNA

Different studies have shown that Vernonia amygdalina is enriched with proteins, fats, fibres, amino acids, minerals vitamins, and carbohydrates but no record yet on the level of heavy metals in Vernonia amygdalina collected from Ojota (dumpsite) and Badagry (control) in Lagos state. Samples of V. amygdalina were collected and analyzed for metals using standard method, while differences in concentrations were analyzed using t-test analysis at level of significance set at p=0.05. The results recorded in mg/100g for the metals content (Cd, Cr, Cu, Pb and Zn) in the plant across the two stations were not significantly different (p&gt;0.05). The Zn in leaf and stem (100.157 ±1.351, 45.743± 3.664) respectively from dumpsite were significantly higher than that of farmland (91.468 ± 2.386, 35.505 ±1.662). Also, Zn content in the root from farmland (73.671 ±2.205) was higher than that of dumpsite (69.515 ± 2.312). All the values of N, P and K recorded in the leaf, stem and roots of bitter leaf from both sites were different significantly (p&lt;0.05). The most frequent nutrient in the leaf, stem and root of the bitter leaf was K, followed by N while the least was P. In contrast, the root contained the highest K, followed by the leaf and then the stem. The DNA band of V. amygdalina from both sites showed no alteration. In conclusion, bitter leaves from both sites were rich in minerals (N, P, and K) though their values were higher at the dumpsites. However, heavy metals content in V. amygdalina at both sites being within standard permissible limits imply it is safe for human consumption.

CONTRIBUTIONS TO THE STUDY OF HEAVY METALS POLLUTING FROM THE ENVIRONMENT, BY ATOMIC SPECTROMETRY

"In this scientific work are presented a part of the results included in the thesis entitled "Contributions to the study of heavy polluting elements from the environment by atomic spectrometry" which includes the innovative contributions to the study of the distribution of heavy metals in acacia leaves collected from Dâmbovița county and neighboring counties and the distribution of heavy metals from surface and deep soil collected from the main oil parks in Dâmbovița county. In the analysis of heavy metal concentrations in the studied samples, the spectrometric techniques were used: Atomic Absorption Spectrometry (AAS) and Energy Dispersive X-Ray Fluorescence Spectrometry (EDXRF), which were successfully optimized and provided valuable information used in following studies, to assess degree of heavy metal pollution of the environment. These methods were used in a complementary way with the biomonitoring technique in order to have as complete information as possible of the elemental composition of the analyzed samples."

Analysis of Heavy Metal Concentrations of Lead (Pb) in Fishermen in Junganyar Village Based on Length of Work Using Atomic Absorption Spectrophotometer Method

Heavy metals are natural components that cannot be destroyed. Lead (Pb) in the oceans comes from activities from ship repair, mining activities, shipbuilding, land and sea transportation activities, to household and urban waste. This study was conducted to determine the levels of lead (Pb) in urine and their relationship to the working period of fishermen. This study used an experimental type of research with 16 urine samples and was carried out in June-July 2022 at the Chemistry Laboratory of the Technology Study Program, the Medical Laboratory of the University of Muhammadiyah Sidoarjo and the FMIPA Laboratory of UIN Maulana Malik Ibrahim Malang. Examination using SSA measurement. The data analysis method used the Pearson and Spearman correlation statistical test. Pearson correlation test obtained a correlation coefficient value of lead (Pb) of 0.208 (positive value for the category of very weak correlation) with a significance of 0.439, so it can be concluded that there is no relationship between heavy metals lead (Pb) in urine with fisherman's tenure.

Analysis of Heavy Metal Concentrations of Lead (Pb) in Fishermen in Junganyar Village Based on Length of Work Using Atomic Absorption Spectrophotometer Method

Heavy metals are natural components that cannot be destroyed. Lead (Pb) in the oceans comes from activities from ship repair, mining activities, shipbuilding, land and sea transportation activities, to household and urban waste. This study was conducted to determine the levels of lead (Pb) in urine and their relationship to the working period of fishermen. This study used an experimental type of research with 16 urine samples and was carried out in June-July 2022 at the Chemistry Laboratory of the Technology Study Program, the Medical Laboratory of the University of Muhammadiyah Sidoarjo and the FMIPA Laboratory of UIN Maulana Malik Ibrahim Malang. Examination using SSA measurement. The data analysis method used the Pearson and Spearman correlation statistical test. Pearson correlation test obtained a correlation coefficient value of lead (Pb) of 0.208 (positive value for the category of very weak correlation) with a significance of 0.439, so it can be concluded that there is no relationship between heavy metals lead (Pb) in urine with fisherman's tenure.

Comparative Analysis of Heavy Metals Concentration in Soil and Vegetable (Celosia argentea) Collected from Two Sampling Sites and Their Effect on the Plant’s DNA Stability

This study investigated the quantities of heavy metals including cadmium (Cd), chromium (Cr), copper (Cu), lead (Pb) and zinc (Zn)in soil samples and in the organs (leaf, stem and root) of Celosia argentea collected from a dumpsite (at Ojota) and a farmland (at Badagry) in Lagos, Nigeria. Additionally, the macroelement content of the soils and the effect of heavy metal soil contamination on C. argentea DNA stability was analysed. Heavy metals and NPK concentrations in the soil samples and organs of C. argentea were evaluated using standard techniques. The results of this study revealed that the microelement were more abundant in the soil collected from the dumpsite. Likewise, all the heavy metals (Cd,Cr,Cu,Pb and Zn) investigated in this study were detected in higher quantities in the dumpsite soil. Notably, the concentration of the metals was within the WHO/FAO limits in the soils collected from both sampling sites save Zn which was 660.260 mg/kg and 449.180mg/kg in the dumpsite and farmland respectively. The concentration of heavy metals in the C. argentea organs in this research were higher in samples collected from the dumpsite and Zn was the most accumulated on both the dumpsite and farmland. The highest amount (95.987 mg/kg) of Zn was by C. argentea root collected from the dumpsite while the least amount (15.380 mg/kg) was detected in C. argentea stem collected from the farmland. The DNA base pairs were not visibly fragmented in the samples C. argentea collected from the control and dumpsite sites. Although most of the heavy metals detected in C. argentea were in negligible quantities, the soils and the vegetable appear to be Zn-contaminated and unsafe for consumption. Keywords: Heavy Metal, DNA, vegetables, biomagnifications, Bioaccumulation, Dumpsites Farmlands

Comparative analysis of heavy metals concentration in soil and vegetable (Solanum lycopersicum) collected from two sampling sites (Farmland and Dumpsite) and the effect on plant DNA

Comparative analysis of heavy metals concentration in soil and vegetable (Solanum lycopersicum) collected from two sampling sites (Farmland and Dumpsite) and the effect on plant DNA

Comparative analysis of heavy metals concentration in soil and vegetable (Solanum lycopersicum) collected from two sampling sites (Farmland and Dumpsite) and the effect on plant DNA

One of the most popular crops with a unique role in human diets especially in Nigeria is Solanum Lycopersicum. The study investigated the levels of heavy metals (cadmium (Cd), chromium (Cr), copper (Cu), lead (Pb)and zinc(Zn) and nutrients(nitrogen (N), phosphorus(P) and potassium(K) in the leaf, stem and root of Solanum lycopersicum and soil collected from dumpsite (in Ojota) and Farmland (in Badagry) in Lagos, Nigeria and their effects on S. lycopersicum using DNA analysis. The results recorded in mg/100g showed that only the value of Zn in stem of S. lycopersicum from farmland (77.671 ± 2.193) was significantly higher than that of dumpsite (72.169 ± 1.656) while Zn in the root S. lycopersicum from farmland (66.556 ± 0.613) was significantly lower than that of dumpsite (71.760±2.699). The values of K in the stem and root, P in the leaf, and N in the stem and root were higher in samples from farmland, while samples from dumpsite had higher value of N in leaf, P in stem and root and K in leaf. Only, Zn in the soil was significantly higher (p&lt;0.05) at dumpsite than farmland. The values of N, P and K in soil from dumpsite were higher (p&lt;0.05) than that from farmland. The DNA bands of the Solanum lycopersicum from control site and dumpsite site have no alteration. In conclusion, all the metal levels did not exceed World Health Organization limits and thus S. lycopersicum is safe for human consumption.

Comparative Analysis of Heavy Metals Concentration in Soil and Vegetable (Capsicum annum) Collected from Two Sampling Sites (Farmland and Dumpsite) and the Effect on Plant DNA

The levels of heavy metals and their effect on the DNA of Capsicum annuum collected from dumpsite (in Ojota) and farmland (in Badagry) in Lagos, Nigeria, were examined using standard procedures.&#x0D; The results of concentration of heavy metals in the soil for the farmland and dumpsite respectively are: Zn (882.0 ±0.006mg/kg, 14316.8±1.009mg/kg), Cr (2.006 ±0.002mg/kg,3.888± 0.002mg/kg), Cd (0.098 ± 0.001mg/kg, 0.644 ± 0.002mg/kg), Cu (0.206± 0.001mg/kg, 0.997 ± 0.001mg/kg) and Pb (0.005 ± 0.003mg/kg, 0.843± 0.002mg/kg) respectively. The values of N (3153.6± 0.008mg/kg, 4191.2± 0.006mg/kg), P (7598.3 ± 0.009mg/kg, 8794.5 ± 0.003mg/kg) and K (113.56 ± 0.004mg/kg, 532.12 ± 0.004mg/kg) were recorded in the soil from farmland and dumpsite respectively. While the values of N, P, and K in soil from dumpsite were higher (p&lt;0.05) than that from farmland, the only value of Zn in the soil of dumpsite was significantly higher than in soil from farmland. Similarly, the values of all metals except Zn recorded in the leaf, stem, and root of C. annuum showed no significant difference between the sample collected from dumpsites and farmland. The values of Zn in leaf, stem, and root of C. annuum from farmland were significantly higher (p&lt;0.05) than that of the dumpsite. The DNA bands of the Capsicum annuum from the control site have a clearer band spectrum than that from the dumpsite site, however, there was no DNA mutation. In conclusion, C. annuum collected from both farmland (in Badagry) and dumpsite (in Ojota) contained minerals and heavy metals whose concentrations were still within standard permissible limits. Thus, C. annuum from both sites is safe for human consumption.

Spatial distribution and pattern of heavy metals in urban soils of Yogyakarta, Indonesia

Heavy metals contamination is becoming a global problem in urban areas. With that, understanding spatial distribution and pattern of heavy metals in urban soils is a crucial step toward sustainable urban development. This study intends to assess the spatial distribution and pattern of four heavy metals (Pb, Cu, Zn, and Cd) in Yogyakarta City outward in the boundaries of Sleman and Bantul Regencies. In relation, we utilized geostatistical method Empirical Bayesian Kriging (EBK) then correlated to Land Cover/Use data for the spatial analysis of heavy metals concentration. The degree of contamination was quantified using indices - PI (Pollution Index), Igeo (Geo-accumulation Index), and PLI (Pollution Load Index). We show that by analysing the Pb, Cu, Zn, and Cd elements of 168 urban soils samples collected, Yogyakarta City, a densely populated area, serves as a place of heavy metals contamination hotspots. Pb and Cu is posed as moderately contaminated, whereas Zn and Cd is considered as uncontaminated (as majority of Zn and Cd values does not exceed the background values). But in overlapping consideration of four heavy metals contamination, they are classified as moderately contaminated (PLI=1.10). In summary, heavy metals contamination in soils varies as a function of urbanization.