The Assessment of Heavy Metals and By-Products on Fried Foods Sold by Roadside Vendors in Calabar, Nigeria

Groundwater serves as the water recharge of surface water and provides clean water for domestic, industrial, and agricultural usage for human life. However, rapid developments resulted in groundwater contamination by heavy metals, pesticides, waste by-products, cosmetics, pharmaceutics, and biological agents. Groundwater contamination by the percolation of heavy metals (HM) is focused on in this review. Heavy metals known for their persistence, bioaccumulation, and biomagnification properties are hazardous to live organisms. Long-term exposure to heavy metals brings adverse effects on respiratory diseases, cardiovascular disorders, cancer, etc. They are considered toxins, carcinogens, mutagens, and teratogens for humans in low concentrations. Hence, technologies to remediate heavy metals and organic pollutant in groundwater is vital to prevent environmental and health issues. However, current conventional remediation technologies that are expensive, utilize hazardous materials, and produce toxic by-products in effluents are insufficient to alleviate heavy metals' effects in groundwater. Thus, an eco-friendly and cost-effective rhizofiltration method that adsorb, concentrate, and precipitate contaminants in or on plants' rhizosphere is introduced. This review portrays the mechanisms involved in rhizofiltration to remediate heavy metals-contaminated groundwater and describes the gaps for rhizofiltration to be a commercially viable technology.

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ANALYSIS OF BIOLOGICAL ABSORPTION COEFFICIENTS OF HEAVY METALS FOR FODDER BEET

EurasianUnionScientists ◽

10.31618/esu.2413-9335.2020.6.71.612 ◽

2020 ◽

Vol 6 (2(71)) ◽

pp. 9-12

Author(s):

Andrey Ilinskiy

Keyword(s):

Heavy Metals ◽

Trace Elements ◽

Copper Content ◽

Mineral Fertilizers ◽

Absorption Coefficients ◽

Fodder Beet ◽

Lead And Cadmium ◽

Root Crops ◽

Copper Zinc ◽

By Products

The results of a field lysimetric experiment on podzolized сhernozem to study the coefficients of biological absorption of heavy metals and trace elements for root crops and tops of fodder beets using various systems of mineral fertilizers are presented. Analysis of the empirical series of accumulation of elements in the main and byproducts of fodder beet plants showed that the level of accumulation of zinc, lead and cadmium in root crops is significantly lower than in the tops, and the copper content is relatively evenly distributed between the main and by-products according to the variants of the experiment. In the variant with an increased agrochemical background, there was a decrease in the content of copper, zinc and lead in the main and by-products of feed beets, which may be due to the effect of biological dilution when using mineral fertilizers.

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The Content of Heavy Metals (HM) in the Main and By-Products of the Main Agricultural Plants Cultivated in the Central Federal District of the Russian Federation

Contemporary problems of social work ◽

10.17922/2412-5466-2019-2-88-95 ◽

2019 ◽

Vol 5 (2) ◽

pp. 88-95

Author(s):

V.A. Gorbunova ◽

◽

V.M. Zubkova ◽

A.N. Manvelov ◽

◽

...

Keyword(s):

Heavy Metals ◽

Russian Federation ◽

Federal District ◽

Central Federal District ◽

Agricultural Plants ◽

The Russian Federation ◽

By Products

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Changes in fatty acids, sterols, pigments, lipid classes, and heavy metals of cooked or dried meals, compared to fresh marine by-products

Animal Feed Science and Technology ◽

10.1016/j.anifeedsci.2016.09.004 ◽

2016 ◽

Vol 221 ◽

pp. 195-205 ◽

Cited By ~ 13

Author(s):

Eduardo Toyes-Vargas ◽

Arlett Robles-Romo ◽

Lía Méndez ◽

Elena Palacios ◽

Roberto Civera

Keyword(s):

Heavy Metals ◽

Fatty Acids ◽

Lipid Classes ◽

By Products

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Modified Ziziphus spina-christi stones as green route for the removal of heavy metals

Scientific Reports ◽

10.1038/s41598-020-76810-y ◽

2020 ◽

Vol 10 (1) ◽

Author(s):

Eman A. Assirey ◽

Shadia M. Sirry ◽

Hayfaa A. Burkani ◽

Medhat A. Ibrahim

Keyword(s):

Heavy Metals ◽

Maximum Adsorption Capacity ◽

Characteristic Functional ◽

Chemically Modified ◽

Green Route ◽

Removal Of Heavy Metals ◽

Ternary Metal ◽

Uptake Process ◽

And Control ◽

By Products

AbstractGreen routes for remediation of heavy metals are worldwide challenges to overcome pollution problems on one hand and control the adverse impact of chemicals on the other hand. Biosorption is one of the most effective methods for removing lower level of heavy metals. The idea to apply natural resources as a green method for removal of heavy metals, this route has no adverse impacts on the environment. This study investigated the ability of chemically modified Ziziphus spina-christi stones (ZSCs) as agriculture by-products to perform the biosorption of Pb(II), Zn(II) and Cd(II) ions from wastewater in a single and ternary metal system. The characteristic functional groups of chemically modified ZSCs were analyzed by Fourier transform infrared. In comparison with acidic ZSCs, alkali-modified ZSCs by KOH was more effective and enhanced the removal efficiency of ZSCs. Using Langmuir isotherm, the maximum adsorption capacity on the modified ZSCs for Pb(II) was 9.06 mg/g, for Zn(II) obtained by using ZSC–citric acid was 4.19 mg/g and 5.38 mg/g for Cd(II) as obtained by using ZSC–H2O2. The molecular electrostatic potential, which was calculated at B3LYP/6-31G(d,p), indicated that each metal is di-hydrated, forming a complex with two units of amino acids. This mechanism demonstrated the uptake process by ZSCs.

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