Monitoring heavy metal contamination levels and microbiological pollution in seawater of Agadir coastal zones

The objective of this study was to monitor the bacteriological contamination of the seawater of the marine fisheries of the coastal Agadir, Morocco. The study was focused on the diagnosis on the pollution in heavy metals, such as cadmium, lead, and mercury in five zones: the port of Imi Ouaddar fish boarding (zone Z1), the old port of Agadir (zones Z2 and Z3), the port of Agadir Marina (zone Z4), and the estuary of Oued Souss (zone Z5). The analyses were done by testing physicochemical parameters (such as pH, temperature, dissolved oxygen, salinity and conductivity) as well as microbiological and atomic adsorption analyses. The experimental results showed that the values of the physicochemical parameters were almost the same in all zones, while the microbial conditions were different, in which this is due to the existence of heavy metals. The more heavy metal concentrations affected the condition of microbes in the sea water, confirmed by the number of Escherichia coli. This study demonstrated the importance of controlling concentration of heavy metals for better sustainability of environment.

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Analisis Kandungan Logam Berat Pada Ikan Kakap Putih (Lates calcarifer Bloch) di Perairan Mimika Papua

Jurnal Ilmu Lingkungan ◽

10.14710/jil.17.2.256-263 ◽

2019 ◽

Vol 17 (2) ◽

pp. 256

Author(s):

Rosye H.R. Tanjung ◽

Suwito Suwito ◽

Vita Purnamasari ◽

Suharno Suharno

Keyword(s):

Heavy Metals ◽

Heavy Metal ◽

Metal Content ◽

Heavy Metal Contamination ◽

Sea Water ◽

Good Condition ◽

Quality Standard ◽

Heavy Metal Content ◽

Lates Calcarifer ◽

Tailings Sand

Kebutuhan bahan pangan sangat tergantung pada ketersediaanya di lingungan. Bahan pangan yang diperlukan untuk memenuhi kebutuhan sehari-hari harus sehat dan bebas dari bahan pencemar, termasuk logam berat. Ikan kakap putih (Lates calcarifer) sering dijumpai pada kawasan muara sungai di hampir seluruh wilayah Indonesia, bahkan di Papua. Tujuan penelitian ini adalah untuk mengkaji kandungan logam berat Pb, Cd, Cu, Fe, As, dan Hg pada ikan kakap putih (L. calcarifer) yang hidup di perairan estuari Mimika Papua. Perairan estuari di Mimika diketahui sebagai salah satu daerah pengendapan pasir sisa tambang (tailing). Metode yang digunakan adalah survei dan analisis laboratorium kandungan logam berat pada tubuh ikan. Analisis Pb, Cd, Cu, Fe, As, dan Hg ditentukan dengan spektroskopi serapan atom (AAS, Atomic Absorpsion Spectroscopy). Penentuan tingkat pencemaran logam berat dilakukan dengan Metode Standar APHA 3113 Cetac Technologies SPR IDA. Analisis data dilakukan dengan membandingkan kandungan logam berat dalam air dengan baku mutu air laut menurut SK MNLH No. 51 tahun 2004. Untuk kandungan logam berat pada organ tubuh ikan dibandingkan dengan kandungan maksimum logam berat berdasarkan SNI 7387: 2009 tentang batas maksimum cemaran logam berat bahan pangan. Kandungan logam berat pada ikan kakap putih masih tergolong aman dikonsumsi karena mengandung logam berat di bawah ambang batas baku mutu. Kondisi ini didukung oleh hasil analisis logam berat pada air yang menunjukkan masih dalam kondisi baik. Kata kunci: L. calcarifer, logam berat, Sungai Kamora, Sungai Ajkwa, Mimika. The need for food depends on the availability in the environment. Foods needed to meet daily needs should be healthy and free of pollutants, including heavy metals. White snapper (Lates calcarifer) is often found in the estuary of the river in almost all parts of Indonesia, even in Papua. The purpose of this research is to study the heavy metal content of Pb, Cd, Cu, Fe, As, and Hg on white snapper (L. calcarifer) which live in Mimika Papua estuary waters. The estuary waters of Mimika are known as one of the deposition areas of tailings sand. The method used is survey and laboratory analysis of heavy metal content in fish body. Analysis of Pb, Cd, Cu, Fe, and Hg was determined by Atomic Absorption Spectroscopy (AAS). Determination of the level of heavy metal contamination was done by Standard Method of APHA 3113 Cetac Technologies SPR IDA. Data analysis was done by comparing the heavy metal content in water with sea water quality standard according to SK MNLH No. 51 year 2004. For heavy metal content in fish body organs compared with maximum content of heavy metals based on SNI 7387: 2009 on the maximum limit of heavy metal food contamination. The content of heavy metals in white snapper is still considered safe for consumption because its below the quality standard threshold. This condition is supported by the results of heavy metal analysis on the water which shows still in good condition. Key words: L. calcarifer, heavy metal, Kamora River, Ajkwa River, Mimika.

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Heavy metals in Venezuelan marine sediments: concentrations, degree of contamination, and distribution

Ciencias Marinas ◽

10.7773/cm.v47i3.3124 ◽

2021 ◽

Vol 47 (3) ◽

Author(s):

Ruth Ramos ◽

Alejandra Verde ◽

Elia M García

Keyword(s):

Heavy Metals ◽

Heavy Metal ◽

Marine Sediments ◽

Heavy Metal Contamination ◽

18Th Century ◽

Distribution Patterns ◽

Potential Hazard ◽

Degree Of Contamination ◽

Metal Concentrations ◽

Heavy Metal Concentrations

Venezuelan oil exploration and exploitation activities have been taking place since the 18th century. These long-term activities are closely related to heavy metal contamination because of the increasing input of toxic pollutants. Variations in heavy metal concentrations can cause, among other things, changes in metal distribution patterns, alterations in biogeochemical cycles, and increments in environmental and biological risks. The need for a complete baseline on heavy metal concentrations along the Venezuelan coast is critical. For this reason, we present the concentrations, distribution, and degree of contamination of 9 heavy metals (barium, mercury, copper, nickel, chromium, cadmium, zinc, lead, and vanadium) in marine sediments along the Venezuelan coast. We used the enrichment factor, the geoaccumulation index, and the mean effects range median quotients to evaluate the degree of contamination, comparing areas with and without intervention. Our results indicate that higher concentrations of these heavy metals are associated with places with greater anthropic activity, especially on the central and eastern coasts of Venezuela. Only cadmium showed extremely severe enrichment and a high degree of contamination. The biohazard potential was between 12% and 30% and was primarily associated with locations having high oil activity, which suggests that these places must be monitored, given the potential hazard they represent. This work encompasses the distribution and concentration of 9 heavy metals along the Venezuelan coast and takes relevance as a baseline for heavy metal concentrations and pollution indicators in marine sediments for Venezuela and the Caribbean.

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Associations between urinary heavy metal concentrations and blood pressure in residents of Asian countries

Environmental Health and Preventive Medicine ◽

10.1186/s12199-021-01027-y ◽

2021 ◽

Vol 26 (1) ◽

Author(s):

Yuki Mizuno ◽

Hana Shimizu-Furusawa ◽

Shoko Konishi ◽

Tsukasa Inaoka ◽

Sk Akhtar Ahmad ◽

...

Keyword(s):

Heavy Metals ◽

Blood Pressure ◽

Heavy Metal ◽

Individual Characteristics ◽

Linear Regression Models ◽

Asian Countries ◽

Cross Sectional ◽

Metal Concentrations ◽

Heavy Metal Concentrations ◽

Cadmium Lead

Abstract Background Previous studies have suggested that exposures to heavy metals (arsenic, cadmium, lead, and selenium) may be associated with differences in blood pressure. However, the findings of these studies have been inconsistent. This study was performed to examine the associations between urinary heavy metal concentrations and blood pressure among residents of four Asian countries (Bangladesh, Indonesia, Nepal, and Vietnam). Methods This cross-sectional study examined 1899 adults in four Asian countries. Urinary concentrations of heavy metals were measured by inductively coupled plasma mass spectrometry. A questionnaire survey was administered regarding individual characteristics. Anthropometric measurements (height and weight) were performed. Systolic and diastolic blood pressures were measured after a short rest. Multiple linear regression models were applied to investigate associations between urinary heavy metal concentrations and blood pressure after adjustments for age, sex, and body mass index. Results The geometric means of the urinary concentrations of arsenic, cadmium, lead, and selenium were 84.6, 0.885, 2.09, and 16.5 μg/g creatinine, respectively. The urinary arsenic concentrations were slightly higher than those typically reported in non-polluted populations, while urinary cadmium, lead, and selenium concentrations were equivalent or slightly lower. The urinary lead concentrations were positively associated with both systolic and diastolic blood pressure, but urinary selenium concentrations were negatively associated with them. Conclusions Variations in the urinary concentrations of lead and selenium were associated with blood pressure at low levels of exposure/intake.

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Monitoring of heavy metal contamination of soil and plants (for example, Potentilla tanacetifolia Willd. ex Schlecht.) of natural ecosystems in Chita urban areas

Samara Journal of Science ◽

10.17816/snv201871121 ◽

2018 ◽

Vol 7 (1) ◽

pp. 110-115

Author(s):

Galina Yurievna Samoilenko ◽

Evgeniy Aleksandrovich Bondarevich ◽

Natalia Nikolaevna Kotsyurzhinskaya ◽

Igor Anatolyevich Boriskin

Keyword(s):

Heavy Metals ◽

Heavy Metal ◽

Urban Areas ◽

Heavy Metal Contamination ◽

Soil Samples ◽

Natural Ecosystems ◽

High Concentration ◽

Mobile Forms ◽

Zinc Cadmium ◽

Cadmium Lead

The paper presents data on the content of gross and mobile forms of zinc, cadmium, lead and copper in the soils of Chita and its surroundings. The paper contains a comparative analysis of the accumulation (Kn) and movement (KP) coefficients of these microelements in organs ( Potentilla tanacetifolia Willd. ex Schlecht.), relative to their gross content and mobile forms in soils. The authors have revealed that soil samples of the studied sites contain unequal gross amount of heavy metals. In some points (6 and 3) the content of cadmium and zinc exceeded the Mac, that is why such soils have been attributed to heavily polluted. The index of biological activity on mobile forms of heavy metals in all sites significantly exceeded the same index on gross forms. It was found that Potentilla tanacetifolia are accumulators of heavy metal ions. Aboveground bodies accumulate and absorb cadmium and copper especially intensively, thus the content of mobile forms of these metals in the soil is insignificant. Excessive adsorption of trace elements in the phytomass of plants can be connected with surface contamination. According to the content of zinc and lead, the accumulation values in the organs of P. tanacetifolia were characterized by small coefficient values, against the background of their high concentration in the soil.

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Heavy metal concentrations in vegetables cultivated and sold in Machakos Municipality, Kenya

Journal of Applied Sciences and Environmental Management ◽

10.4314/jasem.v24i12.3 ◽

2021 ◽

Vol 24 (12) ◽

pp. 2027-2034

Author(s):

R.M. Tomno ◽

L. Kitulu ◽

J.K. Nzeve ◽

F. Waswa ◽

S.N. Mailu ◽

...

Keyword(s):

Heavy Metals ◽

Heavy Metal ◽

Heavy Metal Contamination ◽

Public Awareness ◽

Urban Stream ◽

County Government ◽

Human Consumption ◽

Metal Concentrations ◽

Heavy Metal Concentrations ◽

The Mean

Heavy metal contamination of vegetables is a key aspect of food quality assurance since vegetables form a substantial proportion of the daily human diet. Health risks in urban populations due to exposure to heavy metals are on the increase because of the consumption of vegetables irrigated with wastewater. This study analyzed the concentration of Cd, Cu, Pb, Zn and Cr in spinach and kales grown using contaminated water of the Mitheu urban stream and those sold within Machakos municipality. Vegetable samples were collected once per month for a period of four months starting from June to September 2019. The mean heavy metal concentrations obtained were0.013 – 3.19 mg/kg, 0.468 – 1.706 mg/kg, 0.02 – 0.368 mg/kg, 5.78 – 26.7 mg/kg, and 0.104 – 14.0 mg/kg for Cd, Cu, Pb, Zn and Cr respectively in kale samples from the different sampling sites. The heavy metal mean concentrations in spinach were 0.055 – 0.575 mg/kg, 3.79 – 5.55 mg/kg, 0.098 – 1.49 mg/kg, 8.32 – 20.7 mg/kg and 0.368 – 4.43 mg/kg for Cd, Cu, Pb, Zn and Cr respectively. The mean concentrations of Cd, Pb, Zn and Cr in both spinach and kales in some of the sampling sites were above WHO permissible levels for heavy metals in vegetables for human consumption. However, the mean concentration of Cu was below WHO recommended levels. Consumption of these vegetables therefore poses a health risk to the consumers. There is need to create public awareness on the dangers of consuming contaminated vegetables. Additionally, measures to curb heavy metal pollution in Mitheu stream should be taken by the County Government of Machakos.

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Heavy metal contamination of the Curonian Lagoon bottom sediments (Lithuanian waters area)

Baltica ◽

10.5200/baltica.2016.29.10 ◽

2016 ◽

Vol 29 (2) ◽

pp. 107-120 ◽

Cited By ~ 1

Author(s):

Kęstutis Jokšas ◽

Arūnas Galkus ◽

Rimutė Stakėnienė

Keyword(s):

Heavy Metals ◽

Heavy Metal ◽

Bottom Sediments ◽

Metal Contamination ◽

Heavy Metal Contamination ◽

Pollution Index ◽

River Delta ◽

Curonian Lagoon ◽

Aquatic Area ◽

Heavy Metal Concentrations

Samples of surface (0–3 cm) bottom sediments of the Lithuanian aquatic area of the Curonian Lagoon and Nemunas River delta were taken from 41 sites in 2013 and 2014. Sediment parameters, such as the percentage of particles, concentration of organic carbon and heavy metals (Cu, Zn, Ni, Pb, Cr, Cd, and Hg), were determined. The heavy metal contamination of the surface layer of bottom sediments was determined using the Nemerov’s pollution index applied to soil. The spatial distribution of contamination indices and the dependence of contamination dynamics on sedimentation factors were analysed. It was determined that heavy metal concentrations had a tendency to increase as sediment particles became finer and as Corg concentration increased. A greater amount of pollutants got into the aquatic area of the Curonian Lagoon that was closer to the Klaipėda harbour than into other lagoon zones. The heavy metals for the integral pollution index for the Curonian Lagoon and Nemunas River delta surface bottom sediments could be arranged in the following order: Cd>Pb>Cu>Ni>Hg>Cr>Zn.

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Heavy Metal Contamination of Irrigation Water, Soil, and Vegetables and the Difference between Dry and Wet Seasons Near a Multi-Industry Zone in Bangladesh

Water ◽

10.3390/w11030583 ◽

2019 ◽

Vol 11 (3) ◽

pp. 583 ◽

Cited By ~ 9

Author(s):

Minhaz Ahmed ◽

Masaru Matsumoto ◽

Akinori Ozaki ◽

Nguyen Thinh ◽

Kiyoshi Kurosawa

Keyword(s):

Heavy Metals ◽

Heavy Metal ◽

Irrigation Water ◽

Heavy Metal Contamination ◽

Analysis Data ◽

Dry Season ◽

Wet Season ◽

Metal Concentrations ◽

Heavy Metal Concentrations ◽

The Difference

Heavy metal (Cr, Cu, Zn, As, Cd, and Pb) contamination in irrigation water, soil, and vegetables was investigated in farmland adjacent to a multi-industry zone in Bangladesh in dry and wet seasons. In the zone, many factories release wastewater into nearby irrigation canals, and vegetables cultivated with this water could be a major food chain route for human exposure. In the irrigation water and vegetables, heavy metal concentrations exceeded permissible levels in the two seasons, but this was not the case in soil. Zn had the highest concentration, and Cd had the lowest concentration in irrigation water, soil, and vegetables. All heavy metal concentrations were found to be lower in the wet than in the dry season, which is due to the dilution of water by rainfall, lower absorption of heavy metals from the diluted irrigation water, and heavy metal absorption from low concentrated irrigation water and/or soil. The cluster analysis data of irrigation water, soil, and vegetables revealed that the heavy metals in vegetables were considered to be absorbed from irrigation water in the wet season and from soil in the dry season. In the dry season, the high heavy metal concentrations in vegetables might be caused by a high bioconcentration factor (mostly > 20%).

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Heavy metal contamination of animal feedstuffs – a new survey

Journal of Applied Animal Nutrition ◽

10.1017/jan.2017.7 ◽

2017 ◽

Vol 5 ◽

Cited By ~ 1

Author(s):

S. Elliott ◽

A. Frio ◽

T. Jarman

Keyword(s):

Heavy Metals ◽

Heavy Metal ◽

Food Chain ◽

Heavy Metal Contamination ◽

Animal Health ◽

Sampling Period ◽

Toxic Substances ◽

Contamination Levels ◽

Cadmium And Lead ◽

The Eu

SummaryContamination of feedstuffs and ingredients with heavy metals poses a major problem for animal health and the transmission of toxic substances within the human food chain, as these elements can be accumulated into meat, egg and milk products. This paper reports on the levels of the three metals, arsenic, cadmium and lead, that exceed EU permitted levels, within premixes and complete feeds (total of 3417 samples) destined for a variety of animal species and taken from different countries during the period 2009–2016. For this period, 20% of all samples were contaminated at levels above the EU limit. In complete feed, ruminants were at the highest risk of exposure with 47% of samples being contaminated. Lead posed the major risk for minerals and cadmium posed the highest risk for premixes during the sampling period. When compared by country, contamination levels varied widely, with the highest contamination determined for Canada with 50% of samples being above the EU limit. To mitigate problems with heavy metals in animal feeds, due diligence in terms of sampling and testing is a necessary tool to evaluate level of risk. Research has shown that trace minerals can be sources of these heavy metals so the industry should be more diligent regarding their provider's quality guarantees. In addition, feeds identified with contamination should not be fed to animals to ensure that these heavy metal toxins are not passed into edible food products, thus providing safety in the food chain.

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Heavy metal pollution of street dust in the largest city of Mexico, sources and health risk assessment

Environmental Monitoring and Assessment ◽

10.1007/s10661-021-08993-4 ◽

2021 ◽

Vol 193 (4) ◽

Author(s):

Anahi Aguilera ◽

Francisco Bautista ◽

Margarita Gutiérrez-Ruiz ◽

Agueda E. Ceniceros-Gómez ◽

Rubén Cejudo ◽

...

Keyword(s):

Heavy Metals ◽

Heavy Metal ◽

Health Risk ◽

Human Health ◽

Mexico City ◽

Heavy Metal Contamination ◽

Contamination Factor ◽

Street Dust ◽

Pollution Load Index ◽

Contamination Levels

AbstractIn large industrialized cities, tons of particles containing heavy metals are released into the environment and accumulate on street surfaces. Such particles cause a potential risk to human health due to their composition and size. The heavy metal contamination levels, main emission sources, and human health risks were identified in 482 samples of street dust. Heavy metal concentrations were obtained by microwave-assisted acid digestion and ICP-OES. The results indicated that street dust in Mexico City is contaminated mainly with Pb, Zn, and Cu, according to the contamination factor and the geoaccumulation index. The pollution load index of the street dust was made with the concentrations of Pb, Zn, Cu, Cr, and Ni. The main sources of Pb, Zn, Cu, and Cr are anthropic, probably due to vehicular traffic. The highest levels of Cr and Pb in urban dust represent a health risk for children. Contamination limits were proposed for heavy metals in street dust of Mexico City. These limits might be useful to generate and apply public policies to decrease anthropic emissions of the heavy metals studied, particularly Cr and Pb.

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Phytoprevention of Heavy Metal Contamination From Terrestrial Enhanced Weathering: Can Plants Save the Day?

Frontiers in Climate ◽

10.3389/fclim.2021.820204 ◽

2022 ◽

Vol 3 ◽

Author(s):

Tim Jesper Suhrhoff

Keyword(s):

Heavy Metals ◽

Carbon Dioxide ◽

Heavy Metal ◽

Heavy Metal Contamination ◽

Carbon Capture And Storage ◽

Heavy Metal Accumulation ◽

Environmental Risks ◽

Metal Concentrations ◽

Large Variability ◽

Heavy Metal Concentrations

Enhanced weathering is a promising approach to remove carbon dioxide from the atmosphere. However, it may also pose environmental risks through the release of heavy metals, in particular nickel and chromium. In this perspective article I explore the potential role of plants in modulating these heavy metal fluxes. Agricultural basaltic soils may be valuable study sites in this context. However, the effect of biomass harvesting on the accumulation of heavy metals is currently not well studied. Mostly caused by different parent rock concentrations, there is a large variability of heavy metal concentrations in basaltic and ultramafic soils. Hence, to minimize environmental risks of enhanced weathering, basalts with low heavy metal concentrations should be favored. Existing phytoremediation strategies may be used to “phytoprevent” the accumulation of nickel and chromium released from enhanced weathering in soils. As a result, elevated nickel and chromium concentrations in rocks must not preclude enhanced weathering in all settings. In particular, hyperaccumulating plants could be used as part of a crop rotation to periodically remove heavy metals from soils. Enhanced weathering could also be employed on fields or forests of (non-hyper) accumulating plants that have a high primary production of biomass. Both approaches may have additional synergies with phytomining or bioenergy carbon capture and storage, increasing the total amount of carbon dioxide drawdown and at the same time preventing heavy metal accumulation in soils.

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