Cited by 3,238Environmental Toxicology and EcotoxicologyHeavy metals in environmentHeavy Metal Exposure and Toxicity

Environmental chemistry and ecotoxicology of hazardous heavy metals: environmental persistence, toxicity, and bioaccumulation

Open access
Ali, Hazrat, Khan, Ezzat, Ilahi, Ikram·2019·Journal of Chemistry

Abstract

Heavy metals are well-known environmental pollutants due to their toxicity, persistence in the environment, and bioaccumulative nature. Their natural sources include weathering of metal-bearing rocks and volcanic eruptions, while anthropogenic sources include mining and various industrial and agricultural activities. Mining and industrial processing for extraction of mineral resources and their subsequent applications for industrial, agricultural, and economic development has led to an increase in the mobilization of these elements in the environment and disturbance of their biogeochemical cycles. Contamination of aquatic and terrestrial ecosystems with toxic heavy metals is an environmental problem of public health concern. Being persistent pollutants, heavy metals accumulate in the environment and consequently contaminate the food chains. Accumulation of potentially toxic heavy metals in biota causes a potential health threat to their consumers including humans. This article comprehensively reviews the different aspects of heavy metals as hazardous materials with special focus on their environmental persistence, toxicity for living organisms, and bioaccumulative potential. The bioaccumulation of these elements and its implications for human health are discussed with a special coverage on fish, rice, and tobacco. The article will serve as a valuable educational resource for both undergraduate and graduate students and for researchers in environmental sciences. Environmentally relevant most hazardous heavy metals and metalloids include Cr, Ni, Cu, Zn, Cd, Pb, Hg, and As. The trophic transfer of these elements in aquatic and terrestrial food chains/webs has important implications for wildlife and human health. It is very important to assess and monitor the concentrations of potentially toxic heavy metals and metalloids in different environmental segments and in the resident biota. A comprehensive study of the environmental chemistry and ecotoxicology of hazardous heavy metals and metalloids shows that steps should be taken to minimize the impact of these elements on human health and the environment.

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  • Heavy metals are toxic and cause illnesses and diseases such as lung cancer and cancers of other respiratory organs, kidney and bladder, damage to the brain and reproductive organs, and heart and immune system disorders.

    “Moreover, since they are toxic, they cause illnesses and diseases such as lung cancer and cancers of other respiratory organs, the kidney and bladder, damage to the brain and reproductive organs, and heart and immune system disorders (P.Ahmad et al., 2020;Ali et al., 2019;Bhat et al., 2021).”

    From Adsorption of heavy metals on natural zeolites: A review (2023) · cites this paper as Ali et al., 2019

    Section 14 describes heavy metals as toxic and carcinogenic, while Section 15 says Cd, Pb, and Hg are nephrotoxic. The copy does not substantiate the claimed cancers of specific organs or damage to the brain and reproductive organs, nor does it identify heart or immune-system disorders. No page numbers were provided for these passages. (LLM, conf=0.86)

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Research works printed but not linked: 10

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Authors
Ali, H., Khan, E., & Ilahi, I.
Affiliations
University of Malakand (PK)
Corresponding author
  • Ali, Hazrat
  • Khan, Ezzat
Venue
Journal of Chemistry
Publisher
Wiley
Published
2019-03-05
Volume
2019
Pages
1-14
ISSN
  • 2090-9063 (ISSN-L)
  • 2090-9071
OpenAlex
W2919629449
Cited by
3,238
References
103
Citations by year
2026: 323 · 2025: 520 · 2024: 559 · 2023: 569 · 2022: 554 · 2021: 456 · 2020: 222 · 2019: 28 · 2014: 1
FWCI
135.19
Type
journal article
Language
en
Open access
Locations
  • Journal of Chemistry (publishedVersion, cc-by)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
  • Greater South Information System
Topics
  • Physical Sciences › Environmental Science › Health, Toxicology and Mutagenesis › Environmental Toxicology and Ecotoxicology
  • Physical Sciences › Environmental Science › Pollution › Heavy metals in environment
  • Physical Sciences › Environmental Science › Health, Toxicology and Mutagenesis › Heavy Metal Exposure and Toxicity
Keywords
heavy metals, metalloids, ecotoxicology, environmental persistence, bioaccumulation, trophic transfer, food chain, human health risk, aquatic ecosystems, terrestrial ecosystems, mining pollution, industrial pollution, cadmium, lead, mercury, arsenic, chromium, nickel, copper, zinc, rice, fish, tobacco, biogeochemical cycles

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