COASTAL SEDIMENT POLLUTION
The pollution in
the marine or ocean sediments is an irreversible course. This paper reviews the
overall effects that causes pollution. The
main reasons that causes the risk impact on marine life , its food chain and
the ecosystem are due to the dumping of plastic
wastes, oil spillage , heavy metal interaction, dredging etc . A case study on …………………
is also discussed in this paper. The US legislation has taken many acts against
the ocean pollution. Some of the policies are also noted here.
Micro plastics, sediment pollution, oil spillage, legislation
per an article published in “The Hindu “newspaper
on 13 February 2015, it was stated that the total amount of plastic waste
dumped worldwide are nearly eight million tons. China is standing in the 1st
position with 8.82 annually whereas India is ranked 12th with 0.6
tons annually. As per the survey the total amount of waste generated will be
doubled the number calculated by 2010.
if we believe that ” The solution of
pollution is dilution” , the recent studies shows a dramatic degradation of
shore lines for the past three centuries due to the discharge from industries
as well as the runoff from the agricultural lands . Due to the increase in the
coastal cities, the pollution has increased rapidly.
the dumping was started in rivers and lakes. The ocean dumping was difficult
due to the distance and hardness in transporting the waste. But the waste from
the ships were directly dumped in the mid of the sea. Over the last 150 years,
all type of lavishes were dumped into the ocean such as military waste,
radioactive wastes, industrial wastes, etc. These were dumped through pipe
lines, rivers, gas explorations, offshore mining and became the ultimate
dumping yards for the people.
1: plastic waste dumped in Kochi
FORMS OF POLLUTION
is the prolusion of foreign contaminants in the ecosystem. The most common
pollutants that enters the ocean are oil, sewage, plastics, pesticides,
chemical fertilizers, herbicides and other solid wastes. The pollutants are
either consumed by the marine animals eventually end up in humans where as
other pollutants causes sediment pollution. The nitrogen rich fertilizers
caused pollution in ground water and are finally deposited at bays and deltas.
There causes enormous growth of algae and take up all the oxygen from content.
Thus leaving the water unfit for the marine growth. There are nearly 400 places
worldwide which are prone to these kind of pollution. The solid wastes are
often mistaken as food by the marine animals causing fatal effects.
production, use and improper disposal of plastic has raised the impact on the
ocean pollution. From 1950’s the use has been rapid and by the end of 2010, the
dumping of plastic was nearly 4.8-12.7 million tons in the ocean. This has
caused a negative impact on marine animals and their ecosystem, as well as in
agriculture, tourism, navigation etc. The initial research were done on micro
chemical pollution due to the oil extraction and spillage at various places
causes an high health risk on marine ecosystem. Many oil industries shows less
care while extracting the hydro- carbon petroleum products. The high
concentration of lead in the blood is the main cause of this kind of pollution.
At the downstream of the river, a high concentration of petroleum products were
noticed. Thus as it reaches the main source like oceans, the effect will be
even worse. The marine life will be entirely destroyed.
researchers, studied about the effect of heavy metal on ground water, surface
water, sediments etc. The water bodies like rivers and lakes are contaminated
with heavy metals due to the industrial waste dumping. These water bodies end
up meeting the ocean water and its sediments causing high degree of pollution. The
heavy metals from the municipal sewage, agricultural residues, fertilizers etc.
will penetrate into the sediment causing a detrimental effect on the biotic
life of water. A tremendous effect on food chain is also occurred due to this.
SOLID WASTE DISPOSAL
discharge of semisolid/ bio solid from the sewage plant is another source of
pollution. These are also known as sludge disposal. These are often disposed in
the mid of the sea. But now the US government has prohibited this act by introducing
proper legislation but other countries are still practicing this method.
National Environmental Policy Act (NEPA) in 1969
Ocean Dumping Act (ODA) in 1972
Federal Water Pollution Control Act ( Clean Water Act CWA) in 1972
Convection (LC- 1972) and came in 1975 combining 8 nations for dumping waste at
Convection on the Law of the Sea( UNCLOS) in 1982
of pollutants are dumped into the sea worldwide. The various types of pollutants
that degrade the oceanic sediments are solid waste , plastic waste, heavy
metals, oil spills, sludge, industrial waste etc. To prevent the destruction of
the sediments, the government should be aware of all the materials that are
dumped into the sea. The legislations are at national as well as international
levels. Proper monitoring and enforcement of the rules and regulations should
Frederick Forrest III (1991) “Ocean Dumping: An International and Domestic
Perspective;” Journal of Legislation
“,Vol. 17: Issue 2, Article 7
Antoni Rosell-Melé et al, ” Oil pollution
in soils and sediments from the Northern Peruvian Amazon ” , Science of the Total Environment, 610–611 (2018)
Fabres et al” Marine plastic pollution as a planetary
boundary threat – The drifting piece in the sustainability puzzle”, ” Marine policy “, 7 December 2017
4. Yuxin Ma, Crispin J. Halsall et
al ” Polycyclic
aromatic hydrocarbons in ocean sediments from the North Pacific to the Arctic Ocean, Environmental
Pollution , 227 (2017) 498- 504
Zhao, Jun Wang, Baseline of Pollution of Heavy Metals and Physico-chemical Parameters
in Surface Sediments from Quanzhou Bay, China, in 2006-2007, Procedia Environmental Sciences, 12 ( 2012 ) 421 – 431
Dipak Paul , “Research on heavy metal
pollution of river Ganga: A review”, Annals of Agrarian Science, 15 (2017) 278- 286
Richards, Frederick Forrest III (1991)
“Ocean Dumping: An International and Domestic Perspective” Journal
of Legislation: Vol. 17: Iss. 2, Article 7.