scholarly journals Bioerosion by microbial euendoliths in benthic foraminifera from heavy metal-polluted coastal environments of Portovesme (south-western Sardinia, Italy)

2012 ◽  
Vol 9 (11) ◽  
pp. 4607-4620 ◽  
Author(s):  
A. Cherchi ◽  
C. Buosi ◽  
P. Zuddas ◽  
G. De Giudici
Keyword(s):  
Heavy Metal ◽  
Benthic Foraminifera ◽  
Sea Water ◽  
Industrial Area ◽  
Pollution Source ◽  
Coastal Environments ◽  
Molar Ratios ◽  
Structural Types ◽  
Monitoring Survey ◽  
Mg Content

Abstract. A monitoring survey of the coastal area facing the industrial area of Portoscuso-Portovesme (south-western Sardinia, Italy) revealed intense bioerosional processes. Benthic foraminifera collected at the same depth (about 2 m) but at different distances from the pollution source show extensive microbial infestation, anomalous Mg/Ca molar ratios and high levels of heavy metals in the shell associated with a decrease in foraminifera richness, population density and biodiversity with the presence of morphologically abnormal specimens. We found that carbonate dissolution induced by euendoliths is selective, depending on the Mg content and morpho-structural types of foraminiferal taxa. This study provides evidences for a connection between heavy metal dispersion, decrease in pH of the sea-water and bioerosional processes on foraminifera.

scholarly journals Bioerosion by microbial euendoliths in benthic foraminifera from heavy metal-polluted coastal environments of Portovesme (South-Western Sardinia, Italy)

2012 ◽  
Vol 9 (8) ◽  
pp. 11103-11137
Author(s):  
A. Cherchi ◽  
C. Buosi ◽  
P. Zuddas ◽  
G. De Giudici
Keyword(s):  
Heavy Metal ◽  
Benthic Foraminifera ◽  
Sea Water ◽  
Industrial Area ◽  
Pollution Source ◽  
Coastal Environments ◽  
Molar Ratios ◽  
Structural Types ◽  
Monitoring Survey ◽  
Mg Content

Abstract. A monitoring survey of the coastal area facing the industrial area of Portoscuso-Portovesme (South-Western Sardinia, Italy) revealed intense bioerosional processes. Benthic foraminifera collected at the same depth (about 2 m) but at different distances from the pollution source show extensive microbial infestation, anomalous Mg/Ca molar ratios and high levels of heavy metals in the shell associated with a decrease in foraminifera richness, population density and biodiversity with the presence of morphologically abnormal specimens. We found that carbonate dissolution induced by euendoliths is selective, depending on the Mg content and morpho-structural types of foraminiferal taxa. This study provides evidences for a connection between heavy metal dispersion, decrease in pH of the sea-water and bioerosional processes on foraminifera.

Analysis and Evaluation of Heavy Metal Pollution of Surface Soil in Baicheng City

2012 ◽  
Vol 260-261 ◽  
pp. 786-791
Author(s):  
Gang Wang
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Evaluation Method ◽  
Surface Soil ◽  
Comprehensive Evaluation ◽  
Fuzzy Comprehensive Evaluation ◽  
Industrial Area ◽  
Soil Improvement ◽  
Pollution Source ◽  
Functional Areas

In the thesis, the pollution condition of heavy metals in the soil is evaluated by fuzzy comprehensive evaluation method through testing and analyzing content of heavy metals (As Cd Cr Cu Hg Ni Pb Zn) in 400 sampling points within 400km2 near Baicheng City; and types and sources of pollutions of heavy metals in the soil in Baicheng City are analyzed and studied by factor analysis method. scientific proof for soil improvement and phytoremediation in this area can be provided. It is indicated through the integrated evaluation of the test result that the living quarter, the main road area and the green belt are polluted slightly; the industrial area is polluted moderately. It can be seen through comprehensive analysis that there are three main sources of heavy metal pollutions in the surface soil in Baicheng City: industrial pollution source, traffic pollution source and house pollution source. Therefore, effective measures shall be taken by the local people in the protection of the soil encountered with the various pollution status of the functional areas.

scholarly journals Heavy metal contamination of the Lami coastal environment, Fiji

2001 ◽  
Vol 19 (1) ◽  
pp. 24 ◽  
Author(s):  
Philomena Gangaiya ◽  
Jioji Tabudravu ◽  
Robin South ◽  
Subramanium Sotheeswaran
Keyword(s):  
Heavy Metal ◽  
Heavy Metal Contamination ◽  
Distribution Patterns ◽  
Industrial Area ◽  
Coastal Environment ◽  
Contaminated Sites ◽  
Small Island ◽  
Coastal Environments ◽  
Lead And Zinc ◽  
Significant Enrichment

Contamination of the coastal environment of small island countries is of concern because people's livelihoods in these countries are intimately linked to the resources of the coastal zone. The Lami estuary in Fiji is located downstream of an industrial area and is used extensively for fishing and other recreational activities. Sediment samples from twenty-nine sites within the area were analysed for copper, lead and zinc to determine whether the area is contaminated with heavy metals. Within the estuary, significant enrichment is evident, with heavy metal concentrations exceeding some of those from other known contaminated sites in the country. Although copper contamination appears to be restricted to a few sites within the estuary, contamination with lead and zinc seems to be spreading to areas further away from the shore. Metal distribution patterns clearly indicate adjacent factories to be the main source of contamination. The results show that contrary to popular belief, highly contaminated sites do exist in the relatively pristine coastal environments of island countries like Fiji.

Bioadsorption of Multiple Heavy Metal Ions by Rhizophora Apiculate sp. and Elaesis Guineensis sp.

2017 ◽  
Vol 14 (1) ◽  
pp. 15
Author(s):  
M.B. Nicodemus Ujih ◽  
Mohammad Isa Mohamadin ◽  
Milla-Armila Asli ◽  
Bebe Norlita Mohammed
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Removal Efficiency ◽  
Heavy Metal Ions ◽  
Agricultural Waste ◽  
Living Organism ◽  
Heavy Metal Concentration ◽  
Industrial Area ◽  
Electrochemical Treatment ◽  
Chemical Oxidation

Heavy metal ions contamination has become more serious which is caused by the releasing of toxic water from industrial area and landfill that are very harmful to all living organism especially human and can even cause death if contaminated in small amount of heavy metal concentration. Currently, peoples are using classic method namely electrochemical treatment, chemical oxidation/reduction, chemical precipitation and reverse osmosis to eliminate the metal ions from toxic water. Unfortunately, these methods are costly and not environmentally friendly as compared to bioadsorption method, where agricultural waste is used as biosorbent to remove heavy metals. Two types of agricultural waste used in this research namely oil palm mesocarp fiber (Elaesis guineensis sp.) (OPMF) and mangrove bark (Rhizophora apiculate sp.) (MB) biomass. Through chemical treatment, the removal efficiency was found to improve. The removal efficiency is examined based on four specification namely dosage, of biosorbent to adsorb four types of metals ion explicitly nickel, lead, copper, and chromium. The research has found that the removal efficiency of MB was lower than OPMF; whereas, the multiple metals ions removal efficiency decreased in the order of Pb2+ > Cu2+ > Ni2+ > Cr2+.

THE ABUNDANCE OF RECENT FORAMINIFERA IN SURFACE SEDIMENT OF AMBON BAY

2010 ◽  
Vol 2 (1) ◽  
Author(s):  
Suhartati M. Natsir
Keyword(s):  
Surface Sediment ◽  
Benthic Foraminifera ◽  
Sea Water ◽  
Planktonic Foraminifera ◽  
Sediment Characteristic ◽  
Abundance And Distribution

Foraminifera are generally live in sea water with various sizes. These organisms consist of planktonic and benthic foraminifera. Geological activity on plutonic and volcanic with vomiting magma is transpiring on, and then affects sedimentation and foraminiferal abundance of Ambon Bay. The study was determined to study the abundance and distribution of foraminifera based on the sediment characteristic of Ambon Bay. Sample collected in 2007 of Ambon Bay showed that only 29 samples of 50 samples containing foraminifera. The collected sediments have 86 species of foraminifera, consisting 61 species of benthic foraminifera and 25 species of planktonic foraminifera. The dominant benthic foraminifera in the surface sediment of Ambon bay were Amphistegina lessonii, Ammoniabeccarii,Elphidium craticulatum,Operculina ammonoides and Quinqueloculina parkery. The planktonic foraminifera that were frequently collected from the bay were Globorotalia tumida, Globoquadrina pseudofoliata, Globigerinoides pseudofoliata, Globigerinoides cyclostomus dan Pulleniatina finalis. Generally, the species dwelled as abundant on substrate sand, whereas the areas within substrate mud have no foraminifera lie on them. Keywords: Foraminifera, Abundance, Sediment, Ambon Bay

Evaluation of Heavy Metal Contents in Mudflat Solar Salt, Salt Water, and Sea Water in the Nationwide Salt Pan

2012 ◽  
Vol 41 (7) ◽  
pp. 1014-1019 ◽  
Author(s):  
Hag-Lyeol Kim ◽  
Young-Joo Yoo ◽  
In-Sun Lee ◽  
Gang-Hee Ko ◽  
In-Cheol Kim
Keyword(s):  
Heavy Metal ◽  
Sea Water ◽  
Salt Water ◽  
Solar Salt ◽  
Metal Contents ◽  
Salt Pan

scholarly journals KANDUNGAN LOGAM BERAT (Cu, Pb, Zn, Cd, dan Cr) DALAM AIR DAN SEDIMEN DI PERAIRAN TELUK JAKARTA

2016 ◽  
Vol 11 (1) ◽  
pp. 9 ◽  
Author(s):  
Yani Permanawati ◽  
Rina Zuraida ◽  
Andrian Ibrahim
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Metal Content ◽  
Sea Water ◽  
Sediment Quality ◽  
Atomic Absorption Spectrophotometry ◽  
Quality Score ◽  
Subsurface Sediment ◽  
Absorption Spectrophotometry ◽  
Seawater Quality

Penelitian Lingkungan dan Kebencanaan Geologi Kelautan Perairan Teluk Jakarta (Tanjung Kait – Muara Gembong) dilakukan pada bulan Oktober - November 2010. Uji logam berat (Cu, Pb, Zn, Cd, dan Cr) dilakukan terhadap 28 contoh air laut dan 28 contoh sedimen dasar laut menggunakan metoda Atomic Absorption Spectrophotometry (AAS). Tujuan penelitian ini adalah untuk mendapatkan data dan informasi kondisi lingkungan terkini dari kandungan logam berat dalam air laut dan sedimen dasar laut. Kandungan logam berat (air laut dalam mg/l : sedimen dasar laut dalam ppm) terukur sebagai berikut : Cu ( <0.005 : 15.000-169.500 ); Pb (0.005-0.011 : 14.000-58.100); Zn (0.005-0.007 : 95.800-333.000); Cd (0.006-0.015 : 0.012-0.750); Cr (<0.001 : 45.320-139.180). Berdasarkan Metode Storet dapat dilihat nilai status mutu air laut perairan ini adalah -12, berarti bahwa kualitas air laut di perairan termasuk kelas C (tercemar sedang). Sedangkan status mutu sedimen di perairan menunjukkan skor nilai status mutu sedimen adalah 0, yang berarti bahwa kualitas sedimen termasuk kelas A (tidak tercemar/memenuhi baku mutu). Jelas terlihat bahwa nilai ambang batas (NAB) logam berat dalam sedimen jauh lebih tinggi dari NAB logam berat dalam air. Kata kunci: logam berat, sedimen dasar laut, air laut, nilai status mutu Marine Environmental and Geological Hazard Survey In Jakarta Bay Waters (Tanjung Kait - Muara Gembong) conducted in October-November 2010. Testing of heavy metals (Cu, Pb, Zn, Cd, and Cr) performed on 28 samples of sea water and 28 subsurface sediment samples using the method of Atomic Absorption Spectrophotometry (AAS). The purpose of this study was to obtain data and information on current environmental conditions of heavy metal content in seawater and subsurface sediment. Heavy metal content (sea water in mg/l: subsurface sediment in ppm) measured as follows: Cu ( <0.005 : 15.000-169.500 ); Pb (0.005-0.011 : 14.000-58.100); Zn (0.005-0.007 : 95.800-333.000); Cd (0.006-0.015 : 0.012-0.750); Cr (<0.001 : 45.320-139.180). Based on the Storet method shows the value of water quality status of sea waters is -12, which means that the seawater quality in these waters belong to a class C (medium contaminated). While the status of sediment quality in these waters indicate subsurface sediment quality score status value is 0, which means that subsurface sediment quality belongs to the class A (not polluted/correspond to the quality standards). It is clearly seen that the threshold value (NAV) of heavy metals in sediments is much higher than the NAV of heavy metals in water. Keywords: heavy metal, subsurface sediment, seawater, quality score status

Sign in / Sign up

Export Citation Format

Share Document