Editorial Feature

How Does Chemical Pollution Affect the Ocean?

Marine pollution includes chemicals and garbage. Most pollutants are dumped or blown into the ocean from land-based sources, harming the ecology and well-being of every organism and global economic institution.

oil spill

Image Credit: narai chal/Shutterstock.com

Pollution by Chemicals in Oceans

Numerous chemical contaminants harm the health of the ocean. Various chemicals produce these contaminants, including crude oil and other petroleum products, pharmaceuticals, antifoulants, insecticides, and personal care items. The number of chemicals entering the oceans is thought to have increased by 12% between 2003 and 2022.

Marine pollution is encouraged by the elevated levels of ocean chemicals, such as nitrogen and phosphorus. These chemicals are hazardous to wildlife and humans. Chemical pollution damages the local fishing and tourism sectors because of its harmful effects on human health and the environment.

Types and Effects of Chemical Pollutants in Oceans

Oceans are negatively impacted by oil from spills, discharge, and shipping. Major oil spills in oceans make headlines and are challenging to clean up.

Oil spills have been decreasing recently due to better technologies and regulations. A total of 1.1 million tons of oil were spilled in 1990. This decreased to approximately 25,000 tons by 2015, yet it still accounts for more than 10% of the oil that enters the oceans. The remaining oil waste is discharged into the ocean by rivers, drains, coastal activities, and shipping.

Persistent, bio-accumulative, and toxic pollutants are the most hazardous types of pollutants. Even substances outlawed decades ago, such as polychlorinated biphenyls (PCBs) and polybrominated diphenyl ethers (PBDEs), are still significant in deep-sea oceans.

Polar bears, large fish, and other animals can have pollution levels in their bodies that are a million times higher than the water around them.

Endocrine disruptors and teratogens, which affect marine species' capacity to reproduce or lower offspring survival rates, are a significant concern. Particularly cryptic compounds found in personal care products significantly impact ocean health. For instance, it has been discovered that the sunscreen chemical oxybenzone has a detrimental effect on coral health and reproduction.

Nutrient pollution is also problematic for the environment, oceans, and human health. This kind of pollution occurs when human activities, particularly the application of fertilizer on farms, cause chemical runoff into waterways that eventually empty into the ocean.

Algal blooms are encouraged by the elevated levels of chemicals in the coastal water, such as nitrogen and phosphorus, which can be hazardous to marine life.

Algal blooms severely impact the ecosystem and human health, harming the local fishing and tourism sectors.

Harmful Effects of Plastics on Ocean

All manmade items made of plastic that wind up in the oceans are considered marine waste. Plastic from sources on land accumulates due to storm gusts, littering, and poor waste management.

Numerous plastic goods, such as shopping bags, beverage bottles, bottle caps, food wrappers, cigarette butts, and fishing equipment, are common maritime garbage. Plastic waste is particularly harmful, being such a persistent contaminant. The decomposition of plastic products can take hundreds of years.

Ocean life is at risk from this waste. Fish become entangled in the debris, and some animals mistakenly eat things such as plastic bags.

Microplastic, or very small fragments of degraded plastic, is consumed by small creatures who take the chemicals in the plastic and absorb them into their tissues.

Microplastics found in various marine organisms, including plankton and whales, are particles with a diameter of fewer than five millimeters (0.2 inches). The poisonous compounds become a part of larger animals' tissues when they devour microscopic organisms that absorb microplastics. This causes microplastic contamination to move up the food chain and end up in the foods people consume.

Does a Solution For Marine Pollution Exist?

Disposing of hazardous items into the water is currently prohibited by several national laws and international agreements, yet implementing these restrictions is still difficult.

Several pollutants are challenging to eliminate from the environment, and their concentration rises as chemical pollutants migrate up the food chain.

Plastic has been a concern to the marine environment for generations because it is estimated to take hundreds of years to decompose.

Although isolated initiatives to restore estuaries and bays have succeeded, it is hard to completely clear up pollution as it gets trapped in marine sediment. Promoting reuse and recycling can reduce plastic pollution. Light pollution can be reduced at night by dimming superfluous lights. Promoting sensible chemical use through legislative and consumer initiatives helps safeguard the environment in the long run.

Strategies to Reduce Chemical Pollution in Oceans

Preventing pollution before it happens and cleaning up after it is a strategy to reduce chemical pollution. Today's civilization uses a lot of disposable and single-use plastic, including plastic bottles, shipping boxes, and shopping bags. The process of altering society's perspective on chemical consumption is necessary.

The fight against marine pollution lacks viable options. Plastics marketed as "biodegradable" frequently only degrade at temperatures that will never be reached in the ocean. Nevertheless, numerous nations are acting. More than 60 nations have passed laws restricting or outlawing the use of throwaway plastic objects, according to a 2018 study from the United Nations.

Read more: Tackling the Great Pacific Garbage Patch with The Ocean Cleanup Project

References and Further Reading

Kanhai, L. D. K., Asmath, H., & Gobin, J. F. (2022) The status of marine debris/litter and plastic pollution in the Caribbean Large Marine Ecosystem (CLME): 1980–2020. Environmental Pollution, 300, 118919. https://www.sciencedirect.com/science/article/abs/pii/S0269749122001336

Lehtonen, K. K., Bignert, A., Bradshaw, C., Broeg, K., & Schiedek, D. (2017) Chemical pollution and ecotoxicology. In P. Snoeijs-Leijonmalm, H. Schubert, & T. Radziejewska (Eds.), Biological Oceanography of the Baltic Sea (pp. 547–587). Springer Netherlands. https://link.springer.com/chapter/10.1007/978-94-007-0668-2

Scott, D. (2001). Chemical pollution as a factor affecting the sea survival of Atlantic salmon, Salmo salar L. Fisheries Management and Ecology, 8(6), 487–499. https://onlinelibrary.wiley.com/doi/abs/10.1046/j.1365-2400.2001.00277

Disclaimer: The views expressed here are those of the author expressed in their private capacity and do not necessarily represent the views of AZoM.com Limited T/A AZoNetwork the owner and operator of this website. This disclaimer forms part of the Terms and conditions of use of this website.

Usman Ahmed

Written by

Usman Ahmed

Usman holds a master's degree in Material Science and Engineering from Xian Jiaotong University, China. He worked on various research projects involving Aerospace Materials, Nanocomposite coatings, Solar Cells, and Nano-technology during his studies. He has been working as a freelance Material Engineering consultant since graduating. He has also published high-quality research papers in international journals with a high impact factor. He enjoys reading books, watching movies, and playing football in his spare time.


Please use one of the following formats to cite this article in your essay, paper or report:

  • APA

    Ahmed, Usman. (2022, October 19). How Does Chemical Pollution Affect the Ocean?. AZoCleantech. Retrieved on May 27, 2024 from https://www.azocleantech.com/article.aspx?ArticleID=1624.

  • MLA

    Ahmed, Usman. "How Does Chemical Pollution Affect the Ocean?". AZoCleantech. 27 May 2024. <https://www.azocleantech.com/article.aspx?ArticleID=1624>.

  • Chicago

    Ahmed, Usman. "How Does Chemical Pollution Affect the Ocean?". AZoCleantech. https://www.azocleantech.com/article.aspx?ArticleID=1624. (accessed May 27, 2024).

  • Harvard

    Ahmed, Usman. 2022. How Does Chemical Pollution Affect the Ocean?. AZoCleantech, viewed 27 May 2024, https://www.azocleantech.com/article.aspx?ArticleID=1624.

Tell Us What You Think

Do you have a review, update or anything you would like to add to this article?

Leave your feedback
Your comment type

While we only use edited and approved content for Azthena answers, it may on occasions provide incorrect responses. Please confirm any data provided with the related suppliers or authors. We do not provide medical advice, if you search for medical information you must always consult a medical professional before acting on any information provided.

Your questions, but not your email details will be shared with OpenAI and retained for 30 days in accordance with their privacy principles.

Please do not ask questions that use sensitive or confidential information.

Read the full Terms & Conditions.