A Review on Heavy Metals Contamination in Soil: Effects, Sources, and Remediation Techniques

Li, Changfeng; Zhou, Kehai; Qin, Wenqiang; Tian, Changjiu; Qi, Miao; Yan, Xiaoming; Han, Wei

doi:10.1080/15320383.2019.1592108

Cited by 574 publications

(255 citation statements)

References 79 publications

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“…Dash et al [98] presented rhizobacteria which the authors argued was most suited for alleviating the stress of heavy metals in the agroecosystem. Li et al [99] discussed a number of techniques involving chemical, physical, and biological methods including phytoremediation as a costeffective, environmentally friendly, and aesthetical measure. Evidence from the literature shows that these techniques are lacking in Nigeria.…”

Section: Arsenic (As)mentioning

confidence: 99%

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

Nkwunonwo

Odika

Onyia

2020

The Scientific World Journal

120

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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.

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Section: Arsenic (As)mentioning

confidence: 99%

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

Nkwunonwo

Odika

Onyia

2020

The Scientific World Journal

120

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“…The phosphazene/POSS-based hybrid polymer( PN-POSS) is synthesized (Scheme 1) via Heck reaction of octavinylsilsesquioxane( OVS) with hexa(4-bromophenoxy)-cyclotriphosphazene (HBPCP) in presence of Pd(OAc) 2 /(o-CH 3 Ph) 3 Pc atalyst( see experimental section for details). www.chemasianj.org POSS units serve as rigid and nanosized building blocks, providing highp orosity when phosphazene units serve as functional blocks, providing high adsorption capacity.…”

Section: Resultsmentioning

confidence: 99%

“…[1] When contaminated with water,t hese ions poses significant threat to environment andh uman health, they can accumulate in organisms for al ong time period andc ause cancer or other hard diseases. [2,3] At the present days there are several main approaches for water treatment and removal of heavy metal ions, such as ion exchange, adsorption, chemical deposition, membrane filtration and some their derivatives. [4] The adsorptionm ethodi st he most promising duet ot he technological simplicity,r eusability and low cost.…”

Section: Introductionmentioning

confidence: 99%

“…[52,53] Mohanti et al have used cyclotriphosphazene and trialkoxysilyl groups for the preparation of porous silica for adsorptiono fC r 2 O 7 2À ions, despite the relativelyl ow surface area. [54][55][56] In this study,w ep resent the synthesis of an ew hybrid material from the reaction of octavinylsilsesquioxane (OVS) with hexa(4-bromophenoxy)-cyclotriphosphazene using Pd(OAc) 2 /(o-CH 3 Ph) 3 Pa st he catalyst. Adsorption property of the materialf or heavy metal ions is demonstrated and studied.…”

Section: Introductionmentioning

confidence: 99%

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A POSS‐Phosphazene Based Porous Material for Adsorption of Metal Ions from Water

Soldatov

Liu

2019

Chemistry An Asian Journal

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The development of adsorptive materials continues to be an important area of research for removal of heavy metal ions from waste water. The adsorption capacity can be modulated by both physical and chemical modification of the adsorbent. Herein, we combine the unique properties of polyhedral oligomeric silsesquioxane (POSS) and organocyclophosphazene as the building units to synthesize a hybrid porous material, abbreviated as PN‐POSS. The synthetic method follows a Heck reaction between hexa(4‐bromophenoxy)cyclotriphosphazene and octavinylsilsesquioxane (OVS). The Brunauer–Emmett–Teller (BET) analysis shows that the material possesses micro‐ and mesopores of 1.5 and 3.8 nm size and a surface area on the order of 500 m2 g−1. These attributes in combination with the donor ability of the phosphazene units qualify the material for high adsorption of Pb2+, Hg2+ and Cu2+ ions with maximal adsorption capacities on the order of 1326, 1927 and 2654 mg g−1, respectively. The adsorbent exhibits a good regeneration performance and can be effectively used for water treatment.

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“…Generally, heavy metal refers to metals and metalloids with an atomic mass >20 and a specific gravity >5. According to this definition, many metals and metalloids, such as cadmium (Cd), mercury (Hg), copper (Cu), arsenic (As), lead (Pb), chromium (Cr), nickel (Ni), and zinc (Zn), can be classified as heavy metals (Li, Zhou, et al, 2019). High concentrations of heavy metals in groundwater become serious health hazards.…”

Section: Heavy Metals In Groundwatermentioning

confidence: 99%

Groundwater pollution: Occurrence, detection, and remediation of organic and inorganic pollutants

Kurwadkar

Kanel

Nakarmi

2020

Water Environment Research

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Groundwater pollution is a result of natural and anthropogenic activities. While the elevated levels of various inorganic constituents could be attributed to natural processes, such as geological weathering and aquifer characteristics, many times, anthropogenic activities also substantially pollute the groundwater. On the contrary, the occurrence of organic pollutants is primarily due to various anthropogenic activities. Extensive groundwater mining, the hydraulic connection between groundwater and other surface water bodies, and leaking underground buried infrastructure also contribute to groundwater pollution. Water resources are scarce commodities, and preserving groundwater quality is of critical concern. This paper documents instances of groundwater quality impact during the year 2019 due to both natural and anthropogenic activities throughout the world.

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A Review on Heavy Metals Contamination in Soil: Effects, Sources, and Remediation Techniques

Cited by 574 publications

References 79 publications

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

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

A POSS‐Phosphazene Based Porous Material for Adsorption of Metal Ions from Water

Groundwater pollution: Occurrence, detection, and remediation of organic and inorganic pollutants

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