scholarly journals Assessment of Fluoride and selected heavy metals in food chain around Fluorspar mining Plant, Kenya

2019 ◽  
Vol 8 (1) ◽  
pp. 15-24 ◽  
Author(s):  
Kibet J. Barmao ◽  
◽  
Jackson K. Cherutoi ◽  
Cheruiyot Y. Mitei ◽  
Munyendo L.L. Were ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Food Chain ◽  
Mining Plant

Heavy metals in the habitat and throughout the food chain of the Neotropical otter, Lontra longicaudis, in protected Mexican wetlands

2012 ◽  
Vol 185 (2) ◽  
pp. 1163-1173 ◽  
Author(s):  
Nadia N. Ramos-Rosas ◽  
Carolina Valdespino ◽  
Jaqueline García-Hernández ◽  
Juan P. Gallo-Reynoso ◽  
Eugenia J. Olguín
Keyword(s):  
Heavy Metals ◽  
Food Chain ◽  
Lontra Longicaudis

scholarly journals Contamination of Soil and Plant By the Hazaribagh Tannery Industries

2017 ◽  
Vol 43 (2) ◽  
pp. 207-222 ◽  
Author(s):  
MN Mondol ◽  
A Asia ◽  
AS Chamon ◽  
SMA Faiz
Keyword(s):  
Heavy Metals ◽  
Metropolitan Area ◽  
Food Chain ◽  
Environmental Concern ◽  
Dry Season ◽  
High Concentration ◽  
Wet Season ◽  
Industrial Activities ◽  
Plant Samples ◽  
High Concentrations

An investigation was made at Hazaribagh Tannery area, comprising about 145 industries in Dhaka Metropolitan area. The analyses of soil and plant samples showed that heavy metals contribute significantly towards environmental contamssination resulting from industrial activities. Concentration of heavy metals (Cr, Zn, Pb, Cd, Mn, Fe and Ni) in soil and plant samples cross the MAC (Maximum allowable concentration) in both wet and dry season. In case of soil sample the highest concentration of Cr (172792 ppm) was found at main disposal point. Chromium, Zn, Pb, Cd, Mn, Fe and Ni concentrations at Hazaribagh plant samples respectively ranged from 171-1348, 247-777, 45-96, 1.66-2.17, 72-231, 354-787, and 18-38 ppm respectively in dry season and 75-1142, 209-691, 29- 84, 1.02-2.00, 66-124, 331-664, 11-37 ppm respectively in wet season. Concentration went down gradually with increasing distance from the main disposal point (spot 1). But again high concentration (150708 ppm of Cr) was noted in spot 6. Similar results were found for plant samples. High concentrations of heavy metals were found in plant samples which consequently affect food chain, which may be a major environmental concern. Asiat. Soc. Bangladesh, Sci. 43(2): 207-222, December 2017

scholarly journals A review of the health implications of heavy metals and pesticide residues on khat users

2021 ◽  
Vol 45 (1) ◽  
Author(s):  
Albert M. Oyugi ◽  
Joshua K. Kibet ◽  
John O. Adongo
Keyword(s):  
Heavy Metals ◽  
Food Chain ◽  
The Body ◽  
Control Measures ◽  
World Health ◽  
Health Concern ◽  
Main Body ◽  
Farming Practices ◽  
Health Implications ◽  
The World

Abstract Background There is an exponential rise in the use of farming chemicals in agricultural practices ostensibly to increase food production. The chewing of fresh khat leaves and shoots has spread across the world from ancient khat producing regions in East Africa and the Arabian Peninsula. Khat is a well-established socialization substance with stimulating characteristics. In this work, we have reviewed the deleterious impacts of several heavy metals such as lead, cadmium, iron in the khat plant and their health impacts. Survey on the health complications of farming chemicals used in khat production is also presented. Main body of the abstract The toxic effects of heavy metals and farming chemicals in plant matter such as khat leaves are a serious health concern. Heavy metals including cadmium (Cd) and lead (Pb), for instance, bio-accumulate in the body and the food chain as precursors for disease. It has been established that blood that has lead levels of 40–60 ug/dL is a precursor for serious health illnesses such as cardiac arrest and cancer. On the other hand, cadmium is reported to bind itself onto metallothioneins hence forming cadmium–metallothionein complex that is transported to all body organs causing deleterious cell damage. The entry of farming chemical into the food chain especially via the chewing of contaminated khat has been known to contribute to health problems such as cancer, hypertension and liver cirrhosis. khat is branded a ‘substance of abuse’ by the World Health Organization (WHO) because of the adverse health risks it causes to humans. Relevant articles published between 2010 and 2021, and archived in PubMed, Google Scholar, Medley, Cochrane, and Web of Science were used in this review. Short conclusion The health implications of heavy metals and farming chemicals arising from the consumption of contaminated khat shoots are a serious concern to the khat chewing community. Consequently, there is need to develop better farming practices that may minimize the absorption of heavy metals and farming chemicals by the khat plant. Information presented in this review is also important in sensitizing policy makers to advance control measures towards safer khat farming practices.

scholarly journals Toksisitas Merkuri (Hg) pada struktur jaringan ikan

2020 ◽  
Vol 9 (1) ◽  
Author(s):  
Tamrin A. Ibrahim ◽  
Muhammad Aris
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Immune System ◽  
Stress Response ◽  
Experimental Research ◽  
Food Chain ◽  
The Body ◽  
Tissue Structure ◽  
Industrial Activities ◽  
Conducting Research

The problem of pollution that occurs in the aquatic environment is getting out of control and causes the degradation of fishery resources which are important for humans. One of the pollutants from industrial activities is heavy metal. There are various kinds of heavy metals, mercury (Hg) is the most dangerous heavy metal. Mercury (Hg) enters directly into the waters through rainwater and leaching the soil and river flows which are then absorbed and metabolized by microorganisms. Mercury (Hg) is difficult to degrade from the body, because mercury (Hg) is actively involved in the food chain. Microorganisms feed molluscs, crustaceans and fish which are a source of protein for humans. Mercury (Hg) toxicity in fish can result in a stress response in fish which results in impaired growth, immune system, and changes in tissue structure. This brief review aimed to enrich the scientific repertoire of the toxicity of mercury (Hg) in fish and its effects on humans. This review was a non-experimental research by conducting research around the literature

scholarly journals Metabolic, Bioproductive and Reproductive Effects of Aquatic Exposure to Cadmium in Dish- A Review

2017 ◽  
Vol 74 (1) ◽  
pp. 1
Author(s):  
Bogdan GEORGESCU ◽  
Daniel MIERLITA ◽  
Danut STRUTI ◽  
Hermina KISS ◽  
Anca BOUARU
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Food Security ◽  
Natural Resources ◽  
Food Chain ◽  
Aquatic Environment ◽  
Reproductive Effects ◽  
Human Food Chain ◽  
Growth Development ◽  
Cd Exposure

Cadmium (Cd) exposure in fish is the result of aquatic pollution with heavy metals, which is mainly caused byanthropic interventions. Rarely, Cd mobilization from natural resources takes place. Bioaccumulation in tissues and organs is a property of this heavy metal, to generate various pathological effects and major risks due to bio-propagation within the human food chain. Wehereby reviewed the main circumstances and levels of exposure to Cd in the aquatic environment, and effects on growth, development and reproduction induced by its bioaccumulation in fish, as well as the possible ramifications for food security in humans. 

scholarly journals A Review of the Health Implications of Heavy Metals in Food Chain in Nigeria

2020 ◽  
Vol 2020 ◽  
pp. 1-11 ◽  
Author(s):  
Ugonna C. Nkwunonwo ◽  
Precious O. Odika ◽  
Nneka I. Onyia
Keyword(s):  
Heavy Metals ◽  
Knowledge Base ◽  
Food Chain ◽  
Environmental Science ◽  
Heavy Metal Contamination ◽  
Ecosystem Processes ◽  
Actual Situation ◽  
Human Beings ◽  
Food Components ◽  
Geographical Scale

Heavy metals such as Zn, Pb, Fe, and Cu are abundant in the environment and contribute largely to the sustainability and equilibrium of ecosystem processes. However, because of their bioaccumulation, nondegradability, and the excessive amounts in which they exist, these metals contaminate the food chain and subsequently become a source of toxicity to human beings and the entire ecological function. This is a major issue of concern within the study of environmental science and geochemistry. Although there is a global significance to the issue, it seems more immediate for the developing countries (DCs) such as Nigeria, where the pressure of the teeming population escalates the exigency for human sustainability, food security, and total eradication of hunger. Within the Nigerian context, many studies have examined this all-important issue, but most of these studies are fragmented and limited within the purview of mostly individual states and localities within the country. Taken on a wider geographical scale, the discussions and perspectives of these studies on heavy metal contamination of the food chain offer insufficient insight and expose merely a snapshot of the actual situation. As a result of this, a country-wide knowledge base of the implications of heavy metals on the food chain is lacking. Thus, the present study synthesises existing literature and their findings to create a knowledge base on the vulnerability of the food chain in Nigeria. Aquatic foods, fruits, vegetables, and major staple food such as tubers are the major host of carcinogenic and mutagenic components of heavy metals in Nigeria. This study motivates the Standard Organisation of Nigeria (SON), along with other food and agricultural agencies, to intensify their efforts in monitoring and analysing food components, and we advise consumers to eat with certain degrees of caveat.

Relationship between heavy metals concentrations in egret species, their environment and food chain differences from two Headworks of Pakistan

Chemosphere ◽  
2013 ◽  
Vol 93 (2) ◽  
pp. 274-282 ◽  
Author(s):  
Muhammad Shahbaz ◽  
Muhammad Zaffar Hashmi ◽  
Riffat Naseem Malik ◽  
Azra Yasmin
Keyword(s):  
Heavy Metals ◽  
Food Chain
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