scholarly journals Accumulation of heavy metals (As, Cd, Pb, Hg) on brown algae, Padina australis, cultivated in Kima Bajo Waters, North Minahasa Regency

2021 ◽  
Vol 9 (1) ◽  
Author(s):  
Sarif Hidayat ◽  
Desy M.H. Mantiri ◽  
James J.H. Paulus ◽  
Markus T. Lasut ◽  
Natalie D.C. Rumampuk ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Brown Algae ◽  
Marine Algae ◽  
Metal Accumulation ◽  
Research Area ◽  
Brown Macroalgae ◽  
Initial Concentration ◽  
Wet Weight ◽  
Low Levels ◽  
Time Accumulation

Although heavy metals have relatively low levels in water column and sediments, they will not be degraded and can even be absorbed and accumulated by marine algae. Research on accumulation of heavy metals on algae was done in Kima Bajo Waters, North Minahasa Regency. The research objective was to evaluate the accumulation of four heavy metals, i.e. arsenic (As), cadmium (Cd), plumbum (Pb), and mercury (Hg), on brown macroalgae Padina australis. The alga was introduced and cultivated in the research area using bottom method. The same method was also used in the experiment. One-week acclimatization process was done prior the experiment. Sampling of alga’s thallus was carried out every two weeks to measure the concentration of metals. The experiment was terminated after six weeks. Bottom sediment was also collected at the beginning of the experiment to measure the metal concentration. The results showed that the heavy metals (As, Cd, Pb, and Hg) were accumulated in the algae. The highest concentration of Cd, Pb, and Hg accumulated in the algae was 0.15 mg/kg wet weight, 3.5 mg/kg wet weight, and 0.009 mg/kg wet weight, respectively. All the concentrations were higher than the initial concentration of each metal. Accumulation of As was also occurred with the highest concentration (1,9 mg/kg wet weigh) occurred at fourth weeks; however, it was lower than the initial concentration. The accumulation varied according to type of metals and time; accumulation of Cd, Pb, and Hg were occurred on second weeks of cultivations and As on the fourth weeks. It can be concluded that cultivated alga can accumulate heavy metals.Indonesian title: Akumulasi logam berat (As, Cd, Pb, Hg) pada alga coklat, Padina australis, yang dibudidaya di Perairan Kima Bajo, Kabupaten Minahasa Utara

Investigations of the potential of bivalve molluscs as indicators of heavy metal levels in tropical marine waters

1982 ◽  
Vol 33 (2) ◽  
pp. 285 ◽  
Author(s):  
DW Klumpp ◽  
C Burdon-Jones
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Metal Accumulation ◽  
Condition Index ◽  
Heavy Metal Accumulation ◽  
Bivalve Molluscs ◽  
Field Samples ◽  
Metal Levels ◽  
Wet Weight ◽  
Suitable Organism

The relationships between concentrations of the heavy metals Pb, Cd, Cu, Zn, Co, Ni, and Ag in nine bivalve molluscs (Arca ventricosa, Chama isotoma: Lithophaga teres. Pinctada margiritifera, Pycnodonte hyotis. Spondylus ducalis. Modiolus auriculatus, Trichomya hirsuta, Ustularca renuta) and their environment were studied. The variation in heavy metal accumulation in these field samples and the effects on metal levels and condition of the organisms after relocating for 2 months four of these species (T. hirsuta, M. auriculatus, S. ducalis and C. isotoma), were also studied. The relocated animals maintained or improved condition as judged by the condition index (i.e. ratio of tissue wet weight to shell diameter or weight) during the expefimental period. Levels of Pb and Cu in relocated T. hirsuta varied directly with environmental levels but elevated levels of Zn in the environment were not indicated by this organism. Accumulation of Pb and Cd by T. hirsuta was linear with time and increased in direct proportion to the external concentration of these metals. No loss of either metal was detected after 12 days in 'normal' seawater. The results indicate that T. hirsuta would be a suitable organism for detecting increased levels of heavy metals, except Zn, in the environment.

scholarly journals Heavy metal levels in cattle egrets (Bubulcus ibis) foraging in some abattoirs in Lagos State metropolis

2021 ◽  
Vol 45 (1) ◽  
Author(s):  
Elijah Abakpa Adegbe ◽  
Oluwaseyi Oluwabukola Babajide ◽  
Lois Riyo Maina ◽  
Shola Elijah Adeniji
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Metal Accumulation ◽  
Heavy Metal Contamination ◽  
Heavy Metal Accumulation ◽  
Bubulcus Ibis ◽  
Significant Difference ◽  
Metal Levels ◽  
Lagos State ◽  
The Mean

Abstract Background Heavy metal accumulation in the ecosystem constitutes a potential toxic effect which is hazardous to human health. Increasing environmental pollution has necessitated the use of cattle egrets to evaluate the levels of heavy metal contamination, to establish their use in biomonitoring of heavy metals and to provide data for monitoring pollution in the environment. Results The present study assessed the utilization of Bubulcus ibis in monitoring pollution in five abattoirs, namely Agege, Bariga, Kara, Itire and Idi-Araba, all situated in Lagos State. The concentration of five (5) heavy metals, cadmium (Cd), copper (Cu), nickel (Ni), lead (Pb) and zinc (Zn) was determined in the liver, muscle and feather of Bubulcus ibis using the atomic absorption spectrophotometer. The trend of metal accumulation was in the order: Zn > Cu > Pb > Cd > Ni for all the sampled tissues. The mean tissue concentrations of the metals were significantly different (p < 0.05) among the sites. The highest levels of metal concentration were reported in the liver in all the locations. Mean concentration of Cd in Kara (0.003 ± 0.00058) was significantly (p < 0.05) higher than those found at Agege (0.0013 ± 0.00058) and Idi-Araba (0.001 ± 0.001). A significant difference (p < 0.05) was also observed between the mean concentrations of Cu in Bariga (0.01 ± 0.001) and Idi-Araba (0.003 ± 0.001). Conclusion All the studied heavy metals were present in the liver, muscle and feathers of the cattle egrets. The contamination levels were ascertained from the study which indicated that cattle egrets are useful in biomonitoring studies and the generated data will serve as baseline data which could be compared with data from other locations for monitoring heavy metal pollution.

scholarly journals Effects of road traffic on photosynthetic pigments and heavy metal accumulation in tree species of Kumasi Metropolis, Ghana

2021 ◽  
Vol 3 (1) ◽  
Author(s):  
Ufere N. Uka ◽  
Ebenezer J. D. Belford ◽  
Florence A. Elebe
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Photosynthetic Pigments ◽  
Tree Species ◽  
Metal Accumulation ◽  
Mangifera Indica ◽  
Polluted Site ◽  
Vehicular Pollution ◽  
Terminalia Catappa ◽  
Polyalthia Longifolia

AbstractThis study was undertaken to examine changes in the content of pigments and accumulation of metals from vehicular pollution in selected species of roadside trees under vehicular pollution. A major arterial road with heavy vehicle emissions in the Kumasi Metropolis was designated as the polluted site, while Kwame Nkrumah University of Science and Technology Campus was designated as the control site. Four tree species (Terminalia catappa, Mangifera indica, Ficus platyphylla and Polyalthia longifolia) selected for the study were well distributed and abundant in the polluted and control sites. Photosynthetic pigments and levels of heavy metals (Pb, Cu, Cd and zinc) were assessed in their leaves. Chlorophyll and carotenoid contents were determined by absorption spectrometry, while the metal accumulation index (MAI) was used to determine the total metal accumulation capacity of the tree species. We observed a reduction in photosynthetic pigments in the leaf samples from the polluted site. Ficus platyphylla had the maximum reduction in total chlorophyll (49.34%), whereas Terminalia catappa recorded the lowest reduction (33.88%). Similarly, the largest decrease (31.58%) of carotenoid content was found in Terminalia catappa trees and the lowest in Polyalthia longifolia (16.67%). The Polyalthia longifolia, Ficus platyphylla and Terminalia catappa leaf samples collected at the polluted site recorded a higher ratio of chlorophyll a/b. Heavy metal (Cu, Pb, Zn and Cd) accumulation in leaf samples was higher in the polluted site than in the control, as expected. The highest metal MAI value was recorded in Mangifera indica (5.35) followed by Polyalthia longifolia with 4.30. The findings from this study specifically demonstrate that air contamination induced by vehicles decreases the level of photosynthetic pigments in trees subjected to roadside emissions. It is clear that both chlorophyll a/b and chlorophyll/carotenoid ratios will act as very useful stress-level markers. Elevated heavy metal levels in the tree species along arterial roadsides indicate that they serve as heavy metals sink. The change in MAI resulting from different pollution burden is an indication that the removal capabilities of the tree species differ from each other. We therefore suggest M. indica and P. longifolia as potential species to be used in air pollution reduction plans in the city.

Contents of heavy metals in marine algae from Egyptian Red Sea coast

2006 ◽  
Vol 88 (1) ◽  
pp. 9-22 ◽  
Author(s):  
Aly Mohammed A. Abdallah ◽  
Maha Ahmed Abdallah ◽  
Aly Beltagy ◽  
Eman Siam
Keyword(s):  
Heavy Metals ◽  
Red Sea ◽  
Marine Algae ◽  
Red Sea Coast ◽  
Sea Coast

scholarly journals Copper and Lead Ions Removal by Electrocoagulation: Process Performance and Implications for Energy Consumption

2021 ◽  
Vol 10 (3) ◽  
pp. 415-424
Author(s):  
Aji Prasetyaningrum ◽  
Dessy Ariyanti ◽  
Widayat Widayat ◽  
Bakti Jos
Keyword(s):  
Heavy Metals ◽  
Energy Consumption ◽  
Removal Efficiency ◽  
Current Density ◽  
High Current Density ◽  
Energy Requirement ◽  
Lead Ions ◽  
Initial Concentration ◽  
Electroplating Wastewater ◽  
Electrocoagulation Process

Electroplating wastewater contains high amount of heavy metals that can cause serious problems to humans and the environment. Therefore, it is necessary to remove heavy metals from electroplating wastewater. The aim of this research was to examine the electrocoagulation (EC) process for removing the copper (Cu) and lead (Pb) ions from wastewater using aluminum electrodes. It also analyzes the removal efficiency and energy requirement rate of the EC method for heavy metals removal from wastewater. Regarding this matter, the operational parameters of the EC process were varied, including time (20−40 min), current density (40−80 A/m2), pH (3−11), and initial concentration of heavy metals. The concentration of heavy metals ions was analyzed using the atomic absorption spectroscopy (AAS) method. The results showed that the concentration of lead and copper ions decreased with the increase in EC time. The current density was observed as a notable parameter. High current density has an effect on increasing energy consumption. On the other hand, the performance of the electrocoagulation process decreased at low pH. The higher initial concentration of heavy metals resulted in higher removal efficiency than the lower concentration. The removal efficiency of copper and lead ions was 89.88% and 98.76%, respectively, at 40 min with electrocoagulation treatment of 80 A/m2 current density and pH 9. At this condition, the specific amounts of dissolved electrodes were 0.2201 kg/m3, and the energy consumption was 21.6 kWh/m3. The kinetic study showed that the removal of the ions follows the first-order model.

scholarly journals Heavy Metals Content in Phaeophyceae from Malang Rapat Waters, Bintan

2021 ◽  
Vol 26 (1) ◽  
pp. 57-62
Author(s):  
Hilda Novianty ◽  
Emienour Muzalina Mustafa ◽  
Suratno Suratno
Keyword(s):  
Heavy Metals ◽  
Metal Contamination ◽  
Heavy Metal Contamination ◽  
Dry Weight ◽  
Raw Material ◽  
National Agency ◽  
Brown Macroalgae ◽  
Turbinaria Conoides ◽  
Processed Products

The use of brown-macroalgae (Phaeophyceae) as an alginate source is very broad, covering the food and non-food industry, because of that it is necessary to know the safety of these natural resources, one of which is safe from heavy metal contamination. The purpose of this study was to determine heavy metals concentrations accumulated in several types of Phaeophyceae (brown macroalgae) as an alginate source from Malang Rapat waters, Bintan. The method used was descriptive non-experimental. The determination of the location of sampling was done by purposive sampling method. Samples were taken through free collection, identified species and measured of metal contamination concentrations for As, Cd, and Pb. The data obtained were analyzed descriptively. The results showed that Phaeophyceae found in Malang Rapat waters were Turbinaria conoides, Sargassum aquifolium, Padina australis, Hormophysa cuneiformis with each metal concentration contamination of As 13.95 to 23.30 µg.g-1 dry weight; Cd from 0.33 to 1.08 µg.g-1 dry weight and Pb from 4.72 to 9.92 µg.g-1 dry weight. This study showed that all metal contamination ranges in all Phaeophyceae were on the verge of the maximum limit set by the National Standardization Agency of Indonesia Indonesian (SNI) No 7387 of 2009 and National Agency of Drug and Food Control of RI (BPOM) Regulation No 5 of 2018 for dried macroalgae product so that Phaeophyceae from Malang Rapat waters - Bintan was not safe to be used as raw material for alginate source or other processed products of brown-macroalgae.

scholarly journals Ammonium interference reduced copper uptake by formaldehyde-crosslinked Sargassum sp. seaweed

2017 ◽  
Author(s):  
Wenfa Ng
Keyword(s):  
Heavy Metals ◽  
Metal Removal ◽  
Sorption Kinetics ◽  
Threshold Concentration ◽  
Dependent Manner ◽  
Dilute Solutions ◽  
Brown Macroalgae ◽  
Concentration Dependent Manner ◽  
Nitrogenous Compounds ◽  
Copper Sorption

Sargassum sp., a marine brown macroalgae, is an efficient sorbent for various heavy metals at high concentrations. However, the efficiency at which seaweed removes heavy metals from dilute solutions and the effect of ammonium on metal removal is not well understood; an issue of importance given the ubiquity of nitrogenous compounds in the environment arising from various surface runoffs. Herein, the effect of ammonium on copper removal (at trace to low concentration) by formaldehyde crosslinked Sargassum sp. (treated SW) was studied. Due to high copper background, equilibrium sorption experiments was inconclusive concerning treated SW’s ability in removing copper (<1000 ppb), but rapid copper sorption observed in kinetic experiments suggested potential feasibility of the process. Within initial copper concentration of 4 to 20 ppm and pH 2 to 5, experiments revealed that, above a threshold concentration of [NH4+-N] of 50 ppm, ammonium impede copper update on treated SW in a concentration dependent manner. Specifically, sorption kinetics slowed, and uptake capacity decreased with increase in [NH4+-N] from 0 to 2500 ppm. Collectively, beyond demonstrating that treated SW could remove copper from dilute solutions, revelations that ammonium reduced copper sorption highlighted the importance of accounting for the effect in data interpretation and modelling.

scholarly journals Impact Imposed by Urbanization on Soil Heavy Metal Content of Lake Wetland and Evaluation of Ecological Risks in East Dongting Lake in China

2021 ◽  
Author(s):  
Yang Lin ◽  
Kai Luo ◽  
Zilin Su ◽  
Yang Wu ◽  
Wei Xiao ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Land Use ◽  
Metal Content ◽  
Agricultural Land ◽  
Research Area ◽  
Dongting Lake ◽  
Heavy Metal Content ◽  
Ecological Risks ◽  
Positive Correlation

Abstract The urbanization is regarded as the major factor related to human activities that may interfere with the natural ecosystem. In this study, we have selected the wetland of East Dongting Lake as the research area. We have collected 180 soil samples (within the range of 0–20 cm, and 20cm-40cm), and we have measured the contents of their physicochemical properties (including salinity, pH value, soil particle composition, soil organic carbon, nitrate nitrogen and rapidly available phosphorus) as well as heavy metal elements (including As, Hg, Cd, Pb, Ni and Cr). We have adopted the methods of multivariate statistical analysis and inverse distance weighted (IDW) interpolation, so as to to reveal the sources and distribution characteristics of heavy metal content in soil in the research area. By adopting the potential ecological risk index (PERI) method proposed by Hakanson, we intend to assess the PERI values of heavy metals. Our research findings have shown that: (1) 8 sorts of heavy metals have shown positive correlation with each other. As, Hg and Zn have shown a significantly positive correlation with SOC (P < 0.01); As, Ni, Cr and Zn have shown a significantly positive correlation with AP (P < 0.01); As and Pb have shown a significantly positive correlation with Clay (P < 0.01); whereas Hg and Zn have shown a significantly negative correlation with Silt (P < 0.01); As and Pb have shown a significantly negative correlation with Sand (P < 0.01). (2) During urbanization, the elements of Cd, Ni, As, Hg and Pb might be enriched due to agricultural and industrial activities, whereas the use of fertilizers and pesticides constitute one of the major factors contributing to the increase of Cd and Pb contents in soil. (3) Influenced by the varying land patterns and with exception to Cu, the Fe-normalized concentrations have shown significant variations among different types of land use (P < 0.05). Specifically, there is a significantly higher level of Cd, Zn, Pb and Hg contents in the agricultural land than other types of land use, whereas there is a slightly higher level of heavy metal content in the mudflats than that in the grassland. In addition, the content of heavy metals in woodland remains relatively stable, and with exception to As, the content of heavy metals in woodland is the lowest among the five types of land. (4) The average value of the comprehensive PERI in heavy metals amounts to 555.03, representing a strong degree of ecological risks. Specifically, the proportion of sampling points of Cd that have a high level of ecological risks amounts to 36.51%, which is the primary element contributing to heavy metal pollution in the region, especially in the agricultural land.

scholarly journals Assessment of heavy metal accumulation in tissues of keperas (Cyclocheilichthys apogon Val. 1842) in Lake Lau Kawar, North Sumatra

2021 ◽  
Vol 912 (1) ◽  
pp. 012044
Author(s):  
Wahyudi ◽  
T A Barus ◽  
S Ilyas
Keyword(s):  
Heavy Metals ◽  
Risk Assessment ◽  
Volcanic Ash ◽  
Local Community ◽  
Bioconcentration Factor ◽  
Metal Accumulation ◽  
Heavy Metal Accumulation ◽  
Native Fish ◽  
Fish Resources ◽  
North Sumatra

Abstract Lake Lau Kawar is one of the exposed areas in North Sumatra by the volcanic ash originating from Mount Sinabung eruption. The lake has been utilized as a tourism site and fish resources for consumption by the local community. Keperas (Cyclocheilichthys apogon Val. 1842) is one of the native fish commonly caught by the community. The aim of this study was to determine the levels of selected heavy metals such as copper (Cu), lead (Pb), and zinc (Zn) accumulated by C. apogon and the ones present in the lake water. The results showed that Zn present in the highest concentration followed by Cu and Pb as similar to the results from bioconcentration factor (BCF). All heavy metals (Cu, Pb, Zn) exhibited their highest concentrations in the gills, while the muscles possessed the lowest concentrations of all metals. Risk assessment based on the national and internasional standard revealed that the concentration of these metals was relatively low and safe for consumption.

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