scholarly journals Assessment of Organic Contamination along the Coast of Laizhou Bay, China: Combining Chemical Analysis and Integrated Biomarker Responses in the Clam Ruditapes Philippinarum

2021 ◽  
Author(s):  
Zhifeng Wang ◽  
Yuanyuan Shao ◽  
Chaona Li ◽  
Lei Liu ◽  
Li Zhu ◽  
...  
Keyword(s):  
Chemical Analysis ◽  
Organic Pollutants ◽  
Coastal Area ◽  
Ruditapes Philippinarum ◽  
Coastal Environment ◽  
Eastern Coast ◽  
Laizhou Bay ◽  
Organic Contamination ◽  
Entire Area ◽  
The Impact

Abstract The marine coastal area is facing serious challenges due to several artificial pollution sources. An investigative biomonitoring survey was conducted along the coastal area of Laizhou Bay, China, which combined an evaluation of organic pollution and biomarker responses in the clam Ruditapes philippinarum. Meanwhile, the contents of polychlorinated biphenyls (PCBs), total petroleum hydrocarbons (TPHs) and nonylphenol (NP) in surface sediments at the biomonitoring sites were measured. The results indicated that a complex mixture by these toxic organic pollutants was prevalent throughout the entire area. Concentrations (mean ± standard error) of PCBs, TPHs and NP in sediments of the study area were 1.90 ± 0.10 µg kg-1, 39.55 ± 2.42 mg kg-1, 9.23 ± 0.41 µg kg-1 dry weight, respectively. Biomarker responses of superoxide dismutase (SOD), catalase (CAT), glutathione peroxidase (GPx), Glutathione S-transferase (GST), total glutathione (GSHt) and lipid peroxidation (LPO) levels were assayed in the gills and digestive glands of R. philippinarum collected from eleven sites. Finally, biomarker responses obtained in gills were selected to calculate the integrated biomarker response (IBR) index and to assess the impact of integrated organic contaminants from different stations. The site S2 exhibited an IBR value of 2.65 and was considered as the place with the greatest stress in coastal environment. The western coast (S1-S4) and eastern coast (S9-S11) exhibited higher environmental stress than the sampling sites along the southern coast of Laizhou Bay. PCBs and NP were the main organic pollutants which have caused high level of pollution pressure on R. philippinarum in Laizhou Bay coastal area. The integrated assessment approach of organic contamination which combined chemical analysis and multi-biomarker responses was proved to be practical and useful in coastal environment assessment programs.

TSUNAMI ACEH 2004 SEBAGAI DASAR PENATAAN RUANG KOTA MEULABOH

2013 ◽  
Vol 13 (2) ◽  
Author(s):  
Wisyanto Wisyanto
Keyword(s):  
Coastal Area ◽  
Building Damage ◽  
Tsunami Hazard ◽  
The Road ◽  
Tsunami Disaster ◽  
Landuse Planning ◽  
The Future ◽  
Tsunami Mitigation ◽  
Potential Losses ◽  
The Impact

Tsunami which was generated by the 2004 Aceh eartquake has beenhaunting our life. The building damage due to the tsunami could be seenthroughout Meulaboh Coastal Area. Appearing of the physical loss wasclose to our fault. It was caused by the use dan plan of the land withoutconsidering a tsunami disaster threat. Learning from that event, we haveconducted a research on the pattern of damage that caused by the 2004tsunami. Based on the analysis of tsunami hazard intensity and thepattern of building damage, it has been made a landuse planning whichbased on tsunami mitigation for Meulaboh. Tsunami mitigation-based ofMeulaboh landuse planning was made by intergrating some aspects, suchas tsunami protection using pandanus greenbelt, embankment along withhigh plants and also arranging the direction of roads and setting of building forming a rhombus-shaped. The rhombus-shaped of setting of the road and building would reduce the impact of tsunamic wave. It is expected that these all comprehensive landuse planning will minimize potential losses in the future .

Multiple interactions in riverine biofilms - surfactant adsorption, bacterial attachment and biodegradation

1995 ◽  
Vol 31 (1) ◽  
pp. 61-70 ◽  
Author(s):  
Graham F. White
Keyword(s):  
Organic Pollutants ◽  
Bacterial Attachment ◽  
Solid Surfaces ◽  
Sediment Surface ◽  
Liquid Interfaces ◽  
Polluted Soils ◽  
Biofilm Bacteria ◽  
The Impact ◽  
Multiple Interactions

Many organic pollutants, especially synthetic surfactants, adsorb onto solid surfaces in natural and engineered aquatic environments. Biofilm bacteria on such surfaces make major contributions to microbial heterotrophic activity and biodegradation of organic pollutants. This paper reviews evidence for multiple interactions between surfactants, biodegradative bacteria, and sediment-liquid interfaces. Biodegradable surfactants e.g. SDS, added to a river-water microcosm were rapidly adsorb to sediment surface and stimulated the indigenous bacteria to attach to the sediment particles. Recalcitrant surfactants and non-surfactant organic nutrients did not stimulate attachment Attachment of bacteria was maximal when biodegradation was fastest, and was reversed when biodegradation was complete. Dodecanol, the primary product of SDS-biodegradation, markedly stimulated attachment. When SDS was added to suspensions containing sediment and either known degraders or known non-degraders, only the degraders became attached, and attachment accelerated surfactant biodegradation to dodecanol. These cyclical cooperative interactions have implications for the design of biodegradability-tests, the impact of surfactant adjuvants on biodegradability of herbicides/pesticides formulated with surfactants, and the role of surfactants used to accelerate bioremediation of hydrocarbon-polluted soils.

Facile fabrication of Tl4HgI6 nanostructures as a novel antibacterial and antibiofilm agent and photocatalyst in degradation of organic pollutants

2021 ◽  
Author(s):  
Maryam Karami ◽  
Mojgan Ghanbari ◽  
Hassan Abbas Alshamsi ◽  
Somaye Rashki ◽  
Masoud Salavati-Niasari
Keyword(s):  
Organic Pollutants ◽  
Stoichiometric Ratio ◽  
Facile Fabrication ◽  
The Impact

In the present study, Tl4HgI6 nanostructures have been successfully fabricated through a simple precipitation route. The impact of TlI stoichiometric ratio to HgI2, and kind of surfactants was explored on...

scholarly journals Biomarkers responses in fish (Atherinella brasiliensis) of paranaguá bay, southern Brazil, for assessment of pollutant effects

2013 ◽  
Vol 61 (1) ◽  
pp. 1-11 ◽  
Author(s):  
Ciro Alberto de Oliveira Ribeiro ◽  
Alberto Katsumiti ◽  
Patrícia França ◽  
Jocieli Maschio ◽  
Eliandra Zandoná ◽  
...  
Keyword(s):  
Chemical Analysis ◽  
Protected Areas ◽  
Aquatic Organisms ◽  
Southern Brazil ◽  
Paranaguá Bay ◽  
Fuel Oils ◽  
Polycyclic Aromatic ◽  
Biochemical Genetic ◽  
Autumn And Winter ◽  
The Impact

Paranaguá bay is a complex estuary located in southern Brazil containing three protected areas listed by UNESCO. Historically, the estuary has been affected by urban, industrial, agricultural and harbor activities, and occasional accidents. Specifically, the explosion of the Chilean ship Vicuña in December 2004 spilled methanol and crude and fuel oils which affected both protected and non-protected areas. The present study sought to investigate the pollution threat to aquatic organisms in order to evaluate the potential effects of pollutants. One hundred and twenty adult fish Atherinella brasiliensis were collected from different sites within Paranaguá estuary, including the harbor and open ocean, during summer, autumn and winter of 2005. Among the biomarkers, the somatic index, chemical analysis of bile, biochemical, genetic and morphological parameters were considered. Chemical analysis of bile showed a continuous bioavailability of polycyclic aromatic hydrocarbons (PAHs) according to proximity to the harbor site. The histopathological findings have demonstrated aconsiderable incidence of severe pathologies in the liver and gills, corroborated by biochemical disturbances and genetic damage. These findings indicate that more studies are necessary to evaluate both water quality and fish health so as to permit a better analysis of the impact of pollution in Paranaguá estuary.

scholarly journals Exposure Assessment of Mercury and Its Compounds by Dispersion Modeling: A Case Study in the Sea of Japan Coastal Area

2011 ◽  
Vol 4 ◽  
pp. ASWR.S6551
Author(s):  
Khandakar Habib Al Razi ◽  
Moritomi Hiroshi ◽  
Kambara Shinji
Keyword(s):  
Air Quality ◽  
Sea Of Japan ◽  
Coastal Area ◽  
Concentration Distribution ◽  
Dispersion Model ◽  
Meteorological Data ◽  
Background Concentration ◽  
The Sea Of Japan ◽  
Atmospheric Concentration ◽  
The Impact

In Japan, mercury and its compounds were categorized as hazardous air pollutants in 1996 and are on the list of “Substances Requiring Priority Action” published by the Central Environmental Council of Japan. The Air Quality Management Division of the Environmental Bureau, Ministry of the Environment, Japan, selected the current annual mean environmental air quality standard for mercury and its compounds of 0.04 μg/m3. Long-term exposure to mercury and its compounds can have a carcinogenic effect, inducing eg, Minamata disease. This study evaluates the impact of mercury emissions on air quality in the coastal area of the Sea of Japan. Average yearly emission of mercury from an elevated point source in this area with background concentration and one-year meteorological data were used to predict the ground level concentration of mercury. The annual mean concentration distribution of mercury and its compounds were calculated for the middle part of Honshu Island, which served as a background level of mercury concentration for the coastal are of the Sea of Japan. To estimate the concentration of mercury and its compounds in air of the local area, two different simulation models have been used. The first is the National Institute of Advanced Science and Technology Atmospheric Dispersion Model for Exposure and Risk Assessment (AIST-ADMER) that estimates regional atmospheric concentration and distribution. The second is the Ministry of Economy, Trade and Industry Low Rise Industrial Source Dispersion Model (METI-LIS) that estimates the atmospheric concentration distribution in the vicinity of facilities.

scholarly journals Methylmercury Exposure and Developmental Outcomes in Tohoku Study of Child Development at 18 Months of Age

Toxics ◽  
2018 ◽  
Vol 6 (3) ◽  
pp. 49 ◽  
Author(s):  
Nozomi Tatsuta ◽  
Kunihiko Nakai ◽  
Mineshi Sakamoto ◽  
Katsuyuki Murata ◽  
Hiroshi Satoh
Keyword(s):  
Child Development ◽  
Urban Area ◽  
Prenatal Exposure ◽  
Coastal Area ◽  
Psychomotor Development ◽  
Birth Cohort Study ◽  
Risks And Benefits ◽  
Methylmercury Exposure ◽  
Low Levels ◽  
The Impact

Seafood is an important component in a healthy diet and may contain methylmercury or other contaminants. It is important to recognize the risks and benefits of consuming seafood. A longitudinal prospective birth cohort study has been conducted to clarify the effects of neurotoxicants on child development—the Tohoku Study of Child Development (TSCD) in Japan. TSCD comprises two cohorts; a polychlorinated biphenyls (PCB) cohort (urban area) and a methylmercury cohort (coastal area). Our previous results from the coastal area showed prenatal methylmercury exposure affected psychomotor development in 18-month-olds, and boys appear to be more vulnerable to the exposure than girls. In this report, we have added the urban area cohort and we reanalyzed the impact of prenatal exposure to methylmercury, which gave the same results as before. These findings suggest prenatal exposure to low levels methylmercury may have adverse effects on child development, especially in boys.

Sign in / Sign up

Export Citation Format

Share Document