Tag Archives: Hazardous waste

Archives Reveal Why Africa Should not Depend on Monsanto for GMOs

New innovations in the pharmaceutical and biotech industry must pass through trials to find out the effectiveness and side effects. The innovation is given a Go, if the benefits way outweighs the side effects, if not it is taken back to the lab for more research.

While Food biotechnology may be the solution to food insecurity in Africa through GMOs, Africa must research, develop, produce the GMOs themselves. African nations must understand the innovation enough to be able to decide whether it should be adopted or modified to benefit  their citizens.

Read: Biotechnology – Solving Nigeria’s Food Insecurity Challenges

The health and well-being of Africans cannot be left in the hands of profit-at-all-cost multinationals who may want to use Africans as guinea pigs for new innovations. As much as trials are a big part of research and development (R&D), African countries must carry it out themselves for themselves.

Read: Genome Editing – An Opportunity for Crop Improvement in Africa

It is time for African countries to build their own biotech industry, not only because the future will depend on it, but mainly because multinationals like  Monsanto cannot be trusted as  investigation has shown that the food biotech company based in the United State has endangered people’s health just for profit. The Guardian reported that Monsanto sold banned chemicals for years despite known health risks, archives reveal.

Read: Africa Must Produce its Own Technology

It was reported that Monsanto continued to produce and sell toxic industrial chemicals known as PCBs for eight years after learning that they posed hazards to public health and the environment, according to legal analysis of documents put online in a vast searchable archive.

According to The Guardian, Polychlorinated biphenyls (PCBs) are long-lived pollutants that were mass-produced by Monsanto between 1935 and 1977 for use as coolants and lubricators in electrical equipment such as transformers and capacitors.

By 1979, they had been completely banned in the US and elsewhere, after a weight of evidence linking them to health ailments that ranged from chloracne and Yusho (rice oil disease) to cancer, and to environmental harm.

Yet a decade earlier, one Monsanto pollution abatement plan in the archive from October 1969, singled out by Sherman, suggests that Monsanto was even then aware of the risks posed by PCB use.

More than 20,000 internal memos, minuted meetings, letters and other documents have been published in the new archive revealed, many for the first time.

Read: Is Genetically Engineered Food Good For You

Most were obtained from legal discovery and access to documents requests digitized by the Poison Papers Project, which was launched by the Bioscience Resource Project and the Center for Media and Democracy. Chiron Return contributed some documents to the library.

Bill Sherman, the assistant attorney general for the US state of Washington – which is suing Monsanto for PCB clean-up costs potentially worth billions of dollars – said the archive contained damning evidence the state had previously been unaware of.

He told the Guardian: “If authentic, these records confirm that Monsanto knew that their PCBs were harmful and pervasive in the environment, and kept selling them in spite of that fact. They knew the dangers, but hid them from the public in order to profit.”

Monsanto’s vice president of global strategy, Scott Partridge, did not dispute the authenticity of the documents revealed in the online cache but denied any impropriety.

He told the Guardian: “More than 40 years ago, the former Monsanto voluntarily stopped production and sale of PCBs prior to any federal requirement to do so. At the time Monsanto manufactured PCBs, they were a legal and approved product used in many useful applications. Monsanto has no liability for pollution caused by those who used or discharged PCBs into the environment.”


The New Technology of Managing Pollution with Agricultural Waste

As we preach the gospel of Agriculture in Nigeria and Africa at large we should also look at the horizontal effects of increased agricultural activities. High agricultural activities lead to large agricultural waste generation.

Agricultural waste if not well managed can pollute the environment, though only for a while because it is biodegradable. But it is important to note that before degrading, agricultural wastes can cause significant damage to our environment and health.

There is a new technology that involves the use of agricultural waste to manage environmental pollution. It is important that we look into this cheap and new technology.

Read: Lead Poisoning Killed 28 Children in Nigeria

Agricultural wastes have been used as mature in farms and in recent times, some are being used to make biofuel.  With Biosorption technology, before agricultural wastes are used as manure and biofuel some can be used to manage environmental pollution from poisonous metals (e.g. lead, chromium. Mercury, etc.), dyes and other organic wastes resulting from military, industrial and agricultural activities.

Heavy metals are often assumed to be highly toxic or damaging to the environment. Some are, while certain others are toxic only if taken in excess or encountered in certain forms. Lead for instance is a very toxic heavy metal, and its target organs are bones, the brain, blood, kidneys, and the thyroid glands, so heavy metals and toxic organic wastes must be removed from our waters and rivers.

Read: Hazardous Waste in Nigeria: Problems and Challenges

There are many methods available for the removal of heavy metals and toxic organic wastes from water but they come with several disadvantages such as generation of huge poisonous by-products, high capital costs and are mostly not eco-friendly.

The search for better methods lead to the discovery of the use of biological substances to remove heavy-metals through a process called biosorption which is due to the metal binding capacity of various biological materials to metals, dyes and other wastes.

Many biological materials and agricultural wastes have been discovered to absorb metals and organic wastes from water. These include hyacinth, coconut, copra meal, sea weed, legume pods, moss, water leaf, peanut shell, pineapple peals, rice husk, banana peels, water melon peels, kiwi peels, tangerine peels etc.

How does biosorption works?  

The biosorption process involves a solid phase (sorbent: biological material e.g chaff, husk, peels etc.) and liquid phase (sorbate: the water  containing metals). Due to the high attraction of the chaff or husk to the metals, dyes or other organic wastes in the water, they will bind to each other. The metals, dyes and other wastes bonded to the chaff/husk in the water is afterwards removed from the water leaving the water unpolluted.

Advantage of the use of biosorption using agricultural waste

Plantain peels

The major advantages of biosorption over conventional treatment methods include:

  • the low-cost of the process and the materials used (mostly wastes from homes and farms),
  • the high-efficiency of the method in removing metals from water,
  • the minimization of chemical or biological sludge which in most cases are toxic and can become pollutants,
  • the regeneration of the biological materials (biosorbents) and possibility of recovering the metal from the biological materials used after the process.
  • agricultural waste materials are abundant and easy to source.

Read: Catch Them Young and Train Them to Be Guardians of their Environment

Hazardous Waste in Nigeria: Problems and Challenges


Hazardous waste are by-products of society that can pose a substantial hazard to human health or the environment when improperly managed. Hazardous waste can be determined by: ignitability; corrosivity; reactivity; halogenated hydrocarbons concentration; Polycyclic Aromatic Hydrocarbon concentration; polychlorinated Dibenzo p‐dioxins and dibenzofurans concentrations; and Polychlorinated Biphenyls concentration.

Major Sources of Hazardous Waste in Nigeria

Crude Oil Spillage

The petroleum and petrochemical industries are the major sources of environmental hazard materials in the country. From 1976 – 1996, there was a total of 4,835 spills in Nigeria resulting in a spill volume of 2.3 million barrels of crude oil. From 1976 – 1991, 2,796 spills of about 2.1 million barrels of oil spill was reported. This accounts for about 40% of total oil spills of the Royal Dutch/Shell company.  

Gas Flaring

It is on record that Nigeria is the highest gas flarer in the world. It has been estimated that the total emission of carbon dioxide (CO2) from gas flaring in Nigeria amounts to about 35 million tonnes/year. The average rate of gas flaring in Nigeria over the period 1970 – 1979 stood at 97 %, while for the period 1980 – 1989, this stood at about 72 %, falling marginally to an average of 72% during 1990 – 2000.

Electronic Waste

Waste electrical and electronic equipment (WEEE) contains hazardous materials such as lead, mercury, beryllium, cadmium, and brominated flame-retardants that pose both human and environmental health threat. WEEE generated in Nigeria sums up to 1.1 million tonnes for 2010, which is around 7 kg per capita. This includes at least 100,000 tonnes of WEEE that entered the country illegally in 2010.

Mining Activities

Crude mining activates in state like Zamfara and Plateau expose farm lands and rivers to toxic chemicals such as lead, sulfur, arsenic, mercury and cyanide which are a threat to humans and the environment.

Read: Lead Poisoning Killed 28 Children in Nigeria

Household Hazardous Waste

Most household wastes include among others: household cleaners, materials for home maintenance, garden products, and automotive products, the used contents or leftovers of these products, are either poisonous, toxic, flammable, caustic, corrosive, reactive, explosive, radioactive, or a combination of these characteristics.

Medical Waste

Healthcare activities in Nigeria generate significant amounts of hazardous wastes, such as chemotherapeutic agents, radio nucleoside, mercury, anesthetics gas, corrosive and expired pharmaceuticals. Used needles, blood stained cotton and expired drugs are categorized as hazardous medical wastes because they can be poisonous or toxic. In a study of 5 big health faculties in Abuja, the average waste generation rate per bed/day was found to be 2.78 kg of solid waste, 26.5 % of the total waste was hazardous. 

Read: Four of the Dirtiest Cities in the World are Located in Nigeria – WHO

Problems and Challenges 

Medical waste is often mixed with municipal solid waste and disposed of in residential waste landfills or improper treatment facilities. A study showed that 18.3 % of hospital studied incinerated waste in locally built brick incinerator, 9.1 % bury their waste, 36.3 % burn their waste in open pits, while 36.3 % dispose their waste into municipal dumpsites.

Low operating temperatures (~ 200 °C) of current medical waste incinerators, results in excess generation of dioxins and furans. Since these facilities (at hospitals) are usually located in very close proximity of communities, the emissions from the incinerators presents a serious health risk to the same community which the hospital is meant to be serving.

In Port Harcourt, it was found that hospital wastes were not segregated into color coded containers for the different waste streams, neither do they keep records of waste generation and disposal. Pharmaceutical waste management in some Nigerian pharmaceutical industries was assessed.  It was found that more than 50% of the staff, supposedly in charge of waste, were not trained to effectively manage waste. Those that were trained were either taught just the basics or had their training many years back and so were not aware of current trends in hazardous waste management.

Read: The New Technology of Managing Pollution with Agricultural Waste

WEEE collection in Nigeria is not organised; there are no collection centers and most times, they are dumped along with other wastes. A lot of WEEE are also stockpiled in offices and homes though states such as Lagos have started stockpiling of WEEE pending when a recycling facility is built. Currently, treatment/Recycling is carried out by the informal sector with no knowledge of the environmental and health effects of improper WEEE management.

Most local communities in Zamfara state use Mercury Amalgamation Method in extracting gold, a process particularly degrading and creates a morass of hazardous waste. It has been established that monazite, pyrochlore and xenotime, which are obtained as by-products of tin mining in the Jos Plateau, are radioactive. Mysterious deaths have been attributed to a high level of radiations released by monazite-rich sand used for building the houses in which the deceased lived in, in these area.

The biggest problem is that federal and state governments puts in too little effort to enforce environmental laws especially when it involves big multinationals.

Large hazardous wastes have been produced by Agip, a rich multinational company in oil-producing communities in Ogba/Egbema/Ndoni Local Government Areas of Rivers State. It is stated in research findings that the company use inadequate and below standard disposal strategies, a common situation in Nigeria.

Chevron (Nig) Ltd had severally been accused of contravening the Environmental Impact Assessment (EIA) Act by embarking on a drilling project without EIA.

Read: Catch Them Young and Train Them to Be Guardians of their Environment

Ogoniland was polluted by the Royal Dutch/Shell company with hazardous waste for 50 years. It took the intervention of the UNEP in 2011 before Nigerian government saw the need for action which was not taken till June 2nd, 2016 when President Buhari officially launched a clean-up.

In the 8th NEC, non-compliance of industries and organisations to set standards and guidelines was noted with dismay. The council noted with concern that some of the environmental problems in the country are attributed to non-compliance with the provisions of environmental laws.