Chemical waste

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Chemical waste is any excess, unused, or unwanted chemical, especially those that cause damage to human health or the environment. [1] Chemical waste may be classified as hazardous waste, [2] non-hazardous waste, universal waste, or household hazardous waste. [3] Hazardous waste is material that displays one or more of the following four characteristics: ignitability, corrosivity, reactivity, and toxicity. This information, along with chemical disposal requirements, is typically available on a chemical's Material Safety Data Sheet (MSDS). Radioactive waste requires special ways of handling and disposal due to its radioactive properties. Biohazardous waste, which may contain hazardous materials, is also handled differently.

Contents

Laboratory chemical waste in the US

Chemical waste categories that should be followed for proper packaging, labeling, and disposal of chemical waste Chemical Waste Disposal Guideline.jpg
Chemical waste categories that should be followed for proper packaging, labeling, and disposal of chemical waste

The U.S. Environmental Protection Agency (EPA) prohibits disposing of certain materials down drains. [4] Therefore, when hazardous chemical waste is generated in a laboratory setting, it is usually stored on-site in an appropriate waste carboy where it is later collected and disposed of by a specialist contractor in order to meet safety, health, and legislative requirements. Many universities' Environment, Health, and Safety (EHS) divisions/departments serve this collection and oversight role. [5] [6] [7] [8]

Organic solvents and other organic waste is typically incinerated. [9] [10] [11] [12] Some chemical wastes are recycled, such as waste elemental mercury. [13]

Laboratory waste containment

Laboratory waste containers Chemical Waste Area.jpg
Laboratory waste containers

Packaging

During packaging, chemical liquid waste containers are filled to no further than 75% capacity to allow for vapor expansion and to reduce potential spills which can occur from transporting or moving overfilled containers. Containers for chemical liquid waste are typically constructed from materials compatible with the hazardous waste being stored, such as inert materials like polypropylene (PP) or polytetrafluoroethylene (PTFE). These containers are also constructed of mechanically robust materials in order to minimize leakage during storage or transit.

In addition to the general packaging requirements mentioned above, precipitates, solids, and other non-fluid wastes are typically stored separately from liquid waste. Chemically contaminated glassware is disposed of separately from other chemical waste in containers that cannot be punctured by broken glass. [14] [15]

Labelling

Containers are labelled with the group name from the chemical waste category and an itemized list of the contents. All chemicals or materials contaminated by chemicals pose a significant hazard. All waste must be appropriately packaged. [16]

Storage

Chemical waste containers are kept closed to prevent spillage, except for when waste is being added. Suitable containers are labeled in order to inform disposal specialists of the contents, as well as to prevent addition of incompatible chemicals. [14] Liquid waste is stored in containers with secure screw-top or similar lids that cannot be easily dislodged in transit. Solid waste is stored in various sturdy, chemically inert containers, such as large sealed buckets or thick plastic bags. A secondary containment (e.g., flammable cabinet or large plastic bin, etc.) is used to capture spills and leaks from the primary container and segregate incompatible hazardous wastes, such as acids and bases.

Chemical compatibility guidelines

Many chemicals react adversely when combined. Incompatible chemicals are therefore stored in separate areas of laboratories. [17] [18]

Acids are separated from alkalis, metals, cyanides, sulfides, azides, phosphides, and oxidizers, as when acids combine with these types of compounds, violent exothermic reactions can occur. In addition, some of these reactions produce flammable gases, which, combined with the heat produced, may cause explosions. In the case of cyanides, sulfides, azides, phosphides, etc. Toxic gases are also produced.

Oxidizers are separated from acids, organic materials, metals, reducing agents, and ammonia, as when oxidizers combine with these types of compounds, flammable and sometimes toxic compounds can be created. Oxidizers also increase the likelihood that any flammable material present will ignite, seen most readily in research laboratories with improper storage of organic solvents. [19]

Environmental pollution

Pharmaceuticals

This section is an excerpt from Environmental persistent pharmaceutical pollutant § Background.[ edit ]

Pharmaceuticals comprise one of the few groups of chemicals that are specifically designed to act on living cells. They present a special risk when they persist in the environment.

With the exception of watercourses downstream of sewage treatment plants, the concentration of pharmaceuticals in surface and ground water is generally low. Concentrations in sewage sludge and in landfill leachate may be substantially higher [20] and provide alternative routes for EPPPs to enter the human and animal food-chain.

However, even at very low environmental concentrations (often ug/L or ng/L), the chronic exposure to environmental pharmaceuticals chemicals can add to the effects of other chemicals in the cocktail is still not studied. The different chemicals might be potentiating synergistic effects (higher than additive effects). An extremely sensitive group in this respect are foetuses.

EPPPs are already found in water all over the world. The diffuse exposure might contribute to

  • extinction of species and imbalance of sensible ecosystems, as many EPPPs affect the reproductive systems of for example frogs, mussels, and fish; [21]
  • genetic, developmental, immune and hormonal health effects to humans and other species, in the same way as e.g. oestrogen-like chemicals;[ medical citation needed ]
  • development of microbes resistant to antibiotics, as is found in India. [22]

PPCPs

This section is an excerpt from Environmental impact of pharmaceuticals and personal care products § Presence in the environment.[ edit ]
Further informationon how pollutants enter the environment through the manufacturing of PPCPs: Industrial ecology

The use of pharmaceuticals and personal care products (PPCPs) is on the rise with an estimated increase from 2 billion to 3.9 billion annual prescriptions between 1999 and 2009 in the United States alone. [23] PPCPs enter into the environment through individual human activity and as residues from manufacturing, agribusiness, veterinary use, and hospital and community use. In Europe, the input of pharmaceutical residues via domestic waste water is estimated to be around 80% whereas 20% is coming from hospitals. [24] Individuals may add PPCPs to the environment through waste excretion and bathing as well as by directly disposing of unused medications to septic tanks, sewers, or trash. Because PPCPs tend to dissolve relatively easily and do not evaporate at normal temperatures, they often end up in soil and water bodies.

Some PPCPs are broken down or processed easily by a human or animal body and/or degrade quickly in the environment. However, others do not break down or degrade easily. The likelihood or ease with which an individual substance will break down depends on its chemical makeup and the metabolic pathway of the compound. [25]

River pollution

This section is an excerpt from Environmental impact of pharmaceuticals and personal care products § In rivers.[ edit ]
In 2022, the most comprehensive study of pharmaceutical pollution of the world's rivers finds that it threatens "environmental and/or human health in more than a quarter of the studied locations". It investigated 1,052 sampling sites along 258 rivers in 104 countries, representing the river pollution of 470 million people. It found that "the most contaminated sites were in low- to middle-income countries and were associated with areas with poor wastewater and waste management infrastructure and pharmaceutical manufacturing" and lists the most frequently detected and concentrated pharmaceuticals. [26] [27]
Pharmaceutical pollution of the world's rivers by chemical and region Pharmaceutical pollution of the world's rivers - sites exceeding "safe" limits.webp
Pharmaceutical pollution of the world's rivers by chemical and region

Textile industry

Indigo color water pollution in Phnom Penh, Cambodia, 2005 Indigo pollutionjpg.jpg
Indigo color water pollution in Phnom Penh, Cambodia, 2005

The textile industry is one of the largest polluters in the globalized world of mostly free market dominated socioeconomic systems.[ citation needed ] Chemically polluted textile wastewater degrades the quality of the soil and water. [28] The pollution comes from the type of conduct of chemical treatments used e.g., in pretreatment, dyeing, printing, and finishing operations [29] that many or most market-driven companies use despite "eco-friendly alternatives". Textile industry wastewater is considered to be one the largest polluters of water and soil ecosystems, causing "carcinogenic, mutagenic, genotoxic, cytotoxic and allergenic threats to living organisms". [30] [31] The textile industry uses over 8000 chemicals in its supply chain, [32] also polluting the environment with large amounts of microplastics [33] and has been identified in one review as the industry sector producing the largest amount of pollution. [34]

A campaign of big clothing brands like Nike, Adidas and Puma to voluntarily reform their manufacturing supply chains to commit to achieving zero discharges of hazardous chemicals by 2020 (global goal) [35] [36] appears to have failed.

The textile industry also creates a lot of pollution that leads to externalities which can cause large economic problems. The problem usually occurs when there is no division of ownership rights. This means that the problem of pollution is largely caused because of incomplete information about which company pollutes and at what scale the damage was caused by the pollution.

Planetary boundary

A study by "Scienmag" defines a 'planetary boundary' for novel entities such as plastic and chemical pollution. The study reported that the boundary has been crossed. [37] [38] [39] [40]

Regulation of chemical waste

Chemicals waste may fall under regulations such as COSHH in the United Kingdom or the Clean Water Act and Resource Conservation and Recovery Act in the United States. In the U.S., the Environmental Protection Agency (EPA) and the Occupational Safety and Health Administration (OSHA), as well as state and local regulations, also regulate chemical use and disposal. [41]

Chemical waste in Canadian aquaculture

Chemical waste in oceans is becoming a major issue for marine life. There have been many studies conducted to try and prove the effects of chemicals in oceans. [42] In Canada, many of the studies concentrated on the Atlantic provinces, where fishing and aquaculture are an important part of the economy. In New Brunswick, a study was done on sea urchins in an attempt to identify the effects of toxic and chemical waste on life beneath the ocean, specifically the waste from salmon farms. Sea urchins were used to check the levels of metals in the environment. Green sea urchins have been used as they are widely distributed, abundant in many locations, and easily accessible. By investigating the concentrations of metals in the green sea urchins, the impacts of chemicals from salmon aquaculture activity could be assessed and detected. Samples were taken at 25-meter intervals along a transect in the direction of the main tidal flow. The study found that there were impacts to at least 75 meters based on the intestine metal concentrations.

See also

Related Research Articles

<span class="mw-page-title-main">Pollutant</span> Substance or energy damaging to the environment

A pollutant or novel entity is a substance or energy introduced into the environment that has undesired effects, or adversely affects the usefulness of a resource. These can be both naturally forming or anthropogenic in origin. Pollutants result in environmental pollution or become public health concerns when they reach a concentration high enough to have significant negative impacts.

<span class="mw-page-title-main">Pollution</span> Introduction of contaminants that cause adverse change

Pollution is the introduction of contaminants into the natural environment that cause adverse change. Pollution can take the form of any substance or energy. Pollutants, the components of pollution, can be either foreign substances/energies or naturally occurring contaminants.

<span class="mw-page-title-main">Hazardous waste</span> Ignitable, reactive, corrosive and/or toxic unwanted or unusable materials

Hazardous waste is waste that must be handled properly to avoid damaging human health or the environment. Waste can be hazardous because it is toxic, reacts violently with other chemicals, or is corrosive, among other traits. As of 2022, humanity produces 300-500 metric tons of hazardous waste annually. Some common examples are electronics, batteries, and paints. An important aspect of managing hazardous waste is safe disposal. Hazardous waste can be stored in hazardous waste landfills, burned, or recycled into something new. Managing hazardous waste is important to achieve worldwide sustainability. Hazardous waste is regulated on national scale by national governments as well as on an international scale by the United Nations (UN) and international treaties.

<span class="mw-page-title-main">Sewage sludge</span> Semi-solid material that is produced as a by-product during sewage treatment

Sewage sludge is the residual, semi-solid material that is produced as a by-product during sewage treatment of industrial or municipal wastewater. The term "septage" also refers to sludge from simple wastewater treatment but is connected to simple on-site sanitation systems, such as septic tanks.

<span class="mw-page-title-main">Industrial waste</span> Waste produced by industrial activity or manufacturing processes

Industrial waste is the waste produced by industrial activity which includes any material that is rendered useless during a manufacturing process such as that of factories, mills, and mining operations. Types of industrial waste include dirt and gravel, masonry and concrete, scrap metal, oil, solvents, chemicals, scrap lumber, even vegetable matter from restaurants. Industrial waste may be solid, semi-solid or liquid in form. It may be hazardous waste or non-hazardous waste. Industrial waste may pollute the nearby soil or adjacent water bodies, and can contaminate groundwater, lakes, streams, rivers or coastal waters. Industrial waste is often mixed into municipal waste, making accurate assessments difficult. An estimate for the US goes as high as 7.6 billion tons of industrial waste produced annually, as of 2017. Most countries have enacted legislation to deal with the problem of industrial waste, but strictness and compliance regimes vary. Enforcement is always an issue.

<span class="mw-page-title-main">Toxic waste</span> Any unwanted material which can cause harm

Toxic waste is any unwanted material in all forms that can cause harm. Mostly generated by industry, consumer products like televisions, computers, and phones contain toxic chemicals that can pollute the air and contaminate soil and water. Disposing of such waste is a major public health issue.

<span class="mw-page-title-main">Water pollution</span> Contamination of water bodies

Water pollution is the contamination of water bodies, usually as a result of human activities, that has a negative impact on their uses. Water bodies include lakes, rivers, oceans, aquifers, reservoirs and groundwater. Water pollution results when contaminants mix with these water bodies. Contaminants can come from one of four main sources: sewage discharges, industrial activities, agricultural activities, and urban runoff including stormwater. Water pollution is either surface water pollution or groundwater pollution. This form of pollution can lead to many problems, such as the degradation of aquatic ecosystems or spreading water-borne diseases when people use polluted water for drinking or irrigation. Another problem is that water pollution reduces the ecosystem services that the water resource would otherwise provide.

<span class="mw-page-title-main">Wastewater treatment</span> Converting wastewater into an effluent for return to the water cycle

Wastewater treatment is a process which removes and eliminates contaminants from wastewater and converts this into an effluent that can be returned to the water cycle. Once returned to the water cycle, the effluent creates an acceptable impact on the environment or is reused for various purposes. The treatment process takes place in a wastewater treatment plant. There are several kinds of wastewater which are treated at the appropriate type of wastewater treatment plant. For domestic wastewater, the treatment plant is called a Sewage Treatment. For industrial wastewater, treatment either takes place in a separate Industrial wastewater treatment, or in a sewage treatment plant. Further types of wastewater treatment plants include Agricultural wastewater treatment and leachate treatment plants.

Green chemistry, similar to sustainable chemistry or circular chemistry, is an area of chemistry and chemical engineering focused on the design of products and processes that minimize or eliminate the use and generation of hazardous substances. While environmental chemistry focuses on the effects of polluting chemicals on nature, green chemistry focuses on the environmental impact of chemistry, including lowering consumption of nonrenewable resources and technological approaches for preventing pollution.

<span class="mw-page-title-main">Industrial wastewater treatment</span> Processes used for treating wastewater that is produced by industries as an undesirable by-product

Industrial wastewater treatment describes the processes used for treating wastewater that is produced by industries as an undesirable by-product. After treatment, the treated industrial wastewater may be reused or released to a sanitary sewer or to a surface water in the environment. Some industrial facilities generate wastewater that can be treated in sewage treatment plants. Most industrial processes, such as petroleum refineries, chemical and petrochemical plants have their own specialized facilities to treat their wastewaters so that the pollutant concentrations in the treated wastewater comply with the regulations regarding disposal of wastewaters into sewers or into rivers, lakes or oceans. This applies to industries that generate wastewater with high concentrations of organic matter, toxic pollutants or nutrients such as ammonia. Some industries install a pre-treatment system to remove some pollutants, and then discharge the partially treated wastewater to the municipal sewer system.

<span class="mw-page-title-main">Municipal solid waste</span> Type of waste consisting of everyday items discarded by the public

Municipal solid waste (MSW), commonly known as trash or garbage in the United States and rubbish in Britain, is a waste type consisting of everyday items that are discarded by the public. "Garbage" can also refer specifically to food waste, as in a garbage disposal; the two are sometimes collected separately. In the European Union, the semantic definition is 'mixed municipal waste,' given waste code 20 03 01 in the European Waste Catalog. Although the waste may originate from a number of sources that has nothing to do with a municipality, the traditional role of municipalities in collecting and managing these kinds of waste have produced the particular etymology 'municipal.'

<span class="mw-page-title-main">Construction waste</span> Unwanted material produced directly or incidentally by the construction industries

Construction waste is any kind of debris from the construction process. Different government agencies have clear definitions. For example, the United States Environmental Protection Agency EPA defines construction and demolition materials as “debris generated during the construction, renovation and demolition of buildings, roads, and bridges.” Additionally, the EPA has categorized Construction and Demolition (C&D) waste into three categories: non-dangerous, hazardous, and semi-hazardous.

<span class="mw-page-title-main">Biomedical waste</span> Waste containing infectious material

Biomedical waste or hospital waste is any kind of waste containing infectious materials generated during the treatment of humans or animals as well as during research involving biologics. It may also include waste associated with the generation of biomedical waste that visually appears to be of medical or laboratory origin, as well research laboratory waste containing biomolecules or organisms that are mainly restricted from environmental release. As detailed below, discarded sharps are considered biomedical waste whether they are contaminated or not, due to the possibility of being contaminated with blood and their propensity to cause injury when not properly contained and disposed. Biomedical waste is a type of biowaste.

The regulation of chemicals is the legislative intent of a variety of national laws or international initiatives such as agreements, strategies or conventions. These international initiatives define the policy of further regulations to be implemented locally as well as exposure or emission limits. Often, regulatory agencies oversee the enforcement of these laws.

<span class="mw-page-title-main">Waste</span> Unwanted or unusable materials

Waste are unwanted or unusable materials. Waste is any substance discarded after primary use, or is worthless, defective and of no use. A by-product, by contrast is a joint product of relatively minor economic value. A waste product may become a by-product, joint product or resource through an invention that raises a waste product's value above zero.

<span class="mw-page-title-main">Environmental impact of pharmaceuticals and personal care products</span> Effects of drugs on the environment

The environmental effect of pharmaceuticals and personal care products (PPCPs) is being investigated since at least the 1990s. PPCPs include substances used by individuals for personal health or cosmetic reasons and the products used by agribusiness to boost growth or health of livestock. More than twenty million tons of PPCPs are produced every year. The European Union has declared pharmaceutical residues with the potential of contamination of water and soil to be "priority substances".[3]

<span class="mw-page-title-main">Environmental effects of paint</span>

The environmental effects of paint can vary depending on the type of paint used and mitigation measures. Traditional painting materials and processes can have harmful effects on the environment, including those from the use of lead and other additives. Measures can be taken to reduce its environmental effects, including accurately estimating paint quantities so waste is minimized, and use of environmentally preferred paints, coating, painting accessories, and techniques.

Solid waste policy in the United States is aimed at developing and implementing proper mechanisms to effectively manage solid waste. For solid waste policy to be effective, inputs should come from stakeholders, including citizens, businesses, community-based organizations, non-governmental organizations, government agencies, universities, and other research organizations. These inputs form the basis of policy frameworks that influence solid waste management decisions. In the United States, the Environmental Protection Agency (EPA) regulates household, industrial, manufacturing, and commercial solid and hazardous wastes under the 1976 Resource Conservation and Recovery Act (RCRA). Effective solid waste management is a cooperative effort involving federal, state, regional, and local entities. Thus, the RCRA's Solid Waste program section D encourages the environmental departments of each state to develop comprehensive plans to manage nonhazardous industrial and municipal solid waste.

<span class="mw-page-title-main">Groundwater pollution</span> Ground released seep into groundwater

Groundwater pollution occurs when pollutants are released to the ground and make their way into groundwater. This type of water pollution can also occur naturally due to the presence of a minor and unwanted constituent, contaminant, or impurity in the groundwater, in which case it is more likely referred to as contamination rather than pollution. Groundwater pollution can occur from on-site sanitation systems, landfill leachate, effluent from wastewater treatment plants, leaking sewers, petrol filling stations, hydraulic fracturing (fracking) or from over application of fertilizers in agriculture. Pollution can also occur from naturally occurring contaminants, such as arsenic or fluoride. Using polluted groundwater causes hazards to public health through poisoning or the spread of disease.

Contaminants of emerging concern (CECs) is a term used by water quality professionals to describe pollutants that have been detected in environmental monitoring samples, that may cause ecological or human health impacts, and typically are not regulated under current environmental laws. Sources of these pollutants include agriculture, urban runoff and ordinary household products and pharmaceuticals that are disposed to sewage treatment plants and subsequently discharged to surface waters.

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