Eliminating Metallic and Industrial Contaminants in Food Chain: A Detailed Insight

Introduction:

Ensuring food quality and safety is a central public health concern and is a top priority. The hazards of contamination can occur in the agricultural food chain due to a range of sources like natural toxins and residues of agrochemicals. Veterinary drug residues and pesticides, toxic metals, organic pollutants, mycotoxins, and radionuclides can contaminate food. Radiometric and associated techniques, customized to local needs, are employed in supporting national programs to control the contaminants.

What Are the Food-Borne or Food-Chain-Based Contaminants That Pose Safety Concerns?

Different types of physical pollutants in the food chain may commonly creep in or pollute plant-based foods or even animal feeds that consume plant sources. This can be usually managed by a variety of methods which shall be discussed in this article extensively. Further, they can also impede one’s nutrition because they can pose safety concerns for consumers across the globe.

Contaminants can arise from contact or pollutants rising from jewelry, glass pieces, plasters, band-aids or bandages, food staples, plastic wraps, fungi, packaging materials, larvae of insects, rodents, or debris and crop residues. There can be different sources of physical contaminants that not only just hinder the nutritional impact of plant proteins that one consumes, but also raise food safety issues or concerns for consumers in general.

Some of the common pollutants that rank the top in terms of elimination, in food processing and manufacturing are metallic pollutants. Not only can metallic pollutants in food chains cause skin reactions or food allergies when consumed by sensitized individuals or individuals with a history of metal allergies, but they can also easily predispose individuals to develop multi-organ systemic toxicity (hepatic/renal/cardio/neurotoxicity).

Metals or metallic pollutants are usually removed by using several organic adsorption methods. Natural methods that tend to be organic such as waste biomass production from either peanut hulls or from the cross-linked chain or beads of chitosan (a natural, biodegradable, and non-toxic polysaccharide that is employed in the adsorption process to remove pollutants) are some of the common adsorption methods utilized for the elimination of metallic food pollutants.

What Are the Industrial Contaminants in the Food Chain?

After metallic contaminants, it is the industrial contaminants that can creep into agricultural systems or crop harvests. There are various synthetic contaminants, such as cleansing agents or detergents, sanitizers, pesticides, preservatives, and waste disposal products that are commonly generated from industrial plants utilizing chlorine or from oil leaks and residual wastes, radioactive residues, or even pesticide residues. These synthetic compounds tend to generate nitrate-based contaminants environmentally and are commonly classified into several sub-categories of contaminants.

PCBs (polychlorinated biphenyls), dioxins, chlorinated pesticide residues or pesticide residues from other sources, perfluorinated compounds, food preparation residues, brominated flame retardants, and so on are different types of industrial contaminants in the food industry. The presence of compounds such as acrylamide, furans, and polycyclic aromatic hydrocarbons (PAHs) in foods, can cause immediate and often severe repercussions on an individual’s multi-organ systems, with their presence usually indicative of the underlying industrial contaminants listed above.

What Is the Role of Peanut Hulls in the Elimination of Metals?

Peanut hulls are very commonly used in modern-day food chains, as adsorbing materials because of their high potency to completely remove heavy metals from food extracts. Peanut hulls exhibit a nearly 88.6 ± 1.9 percent (as of current medical research evidence) in the elimination of cadmium metal pollutants. This demonstrates its efficacy as one of the most natural adsorption agents that helps eliminate food contamination hazards. Further, peanut hulls being an organic adsorption method can ensure that there is no reduction in the overall antioxidant content of the plant food or extract that is being purified.

For instance, in the same classic example of cadmium metal elimination or plant extract purification, without reducing the overall phenolic or antioxidant compound content within the extracts, peanut hulls can adsorb the metallic pollutants effectively up to a whopping 85 to 90 percent of efficacy, thereby reducing the foodborne contamination risks. One of the other major pollutants is arsenic which often requires multiple other methods apart from adsorption or rather use of multiple agents such as chitosan or heavy metal-eliminating agents.

One of the best ways to nutritionally ensure arsenic removal from foods is to parboil it, so as to thoroughly decontaminate the material or food, such as rice which is commonly contaminated by this metal.

What International and Local Regulations Are Adopted in the Elimination of Metallic and Industrial Wastes?

Various international organizations such as the WHO (World Health Organization), FAO (Food and Agriculture Organization), UNEP (United Nations Environment Programme), UNIDO (United Nations Industrial Development Organization), and so on have their own regulations that may vary slightly from country to country across the world in reducing or eliminating the metallic and industrial pollutants, food debris, contaminants, pesticide residues, and so on. Regardless of these international regulations, there is a need for local agricultural corporations or communities to cross-check and verify whether the foods post-harvest being sold in commercial and organic markets are free from pesticides or whether there is a risk of metallic and industrial pollutants.

Usually, the local agricultural bodies that are in charge of monitoring the quality of harvest investigate the following or rather utilize the given below steps to ensure the elimination of metallic and industrial physical pollutants:

• Careful observation or cross-checking of agricultural goods and food products for physical pollutants.

• Use of pesticides or fertilizers adaptively only under experienced supervisors, and using products that can eliminate all food safety concerns in the pre or post-harvest stage.

• Use of high-end sophisticated systems in agriculture such as nanomaterial-based electrochemical detection of physical or industrial and chemical contaminants in the food chain.

• Periodic checks in import and export shops before being released into local markets.

• Regulation of materials used for manufacturing pesticides and using them selectively. These are used only to raise the quality of food and not otherwise.

Conclusion:

Though the safety reference values vary from one region to another across the globe, it is still important that at the community level, metallic and industrial pollutants that directly affect the food chains can directly or indirectly impact the human immune system. Hence, these need to be eliminated effectively. By monitoring harvest, and through modern and natural organic adsorption methods such as the use of peanut hulls, chitosan, and so on, and by using high-end agricultural monitoring systems, these contaminants can be prohibited from making their way into one’s daily diet.