scholarly journals Urban water pollution by heavy metals and health implication in Onitsha, Nigeria

2015 ◽  
Vol 9 (4) ◽  
pp. 325-331 ◽  
Author(s):  
C C Ezeabasili A ◽  
L Anike O ◽  
U Okoro B
Keyword(s):  
Water Pollution ◽  
Heavy Metals ◽  
Urban Water ◽  
Health Implication

scholarly journals A New Ex Vivo Model to Evaluate the Hair Protective Effect of a Biomimetic Exopolysaccharide against Water Pollution

Cosmetics ◽  
2020 ◽  
Vol 7 (4) ◽  
pp. 78
Author(s):  
Claire Tubia ◽  
Alfonso Fernández-Botello ◽  
Jan Dupont ◽  
Eni Gómez ◽  
Jérôme Desroches ◽  
...  
Keyword(s):  
Water Pollution ◽  
Heavy Metals ◽  
Heavy Metal ◽  
Adverse Effects ◽  
Inductively Coupled Plasma ◽  
Ex Vivo ◽  
Polluted Water ◽  
Ex Vivo Model ◽  
Fiber Damage ◽  
The Impact

As an external appendage, hair is exposed to multiple stresses of different origins such as particles and gases in air, or heavy metals and chemicals in water. So far, little research has addressed the impact of water pollution on hair. The present study describes a new ex vivo model that allowed us to document the adverse effects of water pollutants on the structure of hair proteins, as well as the protective potential of active cosmetic ingredients derived from a biomimetic exopolysaccharide (EPS). The impact of water pollution was evaluated on hair from a Caucasian donor repeatedly immersed in heavy metal-containing water. Heavy metal retention in and on hair was then quantified using Inductively Coupled Plasma Spectrometry (ICP/MS). The adverse effects of heavy metals on the internal structure of hair and its prevention by the EPS were assessed through measurement of keratin birefringence. Notably, the method allows the monitoring of the organization of keratin fibers and therefore the initial change on it in order to modulate the global damage in the hair. Results revealed an increasing amount of lead, cadmium and copper, following multiple exposures to polluted water. In parallel, the structure of keratin was also altered with exposures. However, heavy metal-induced keratin fiber damage could be prevented in the presence of the tested EPS, avoiding more drastic hair problems, such as lack of shine, or decrease in strength, due to damage accumulation.

scholarly journals Experimental study on the adsorption of dissolved heavy metals by nano-hydroxyapatite

2020 ◽  
Vol 82 (9) ◽  
pp. 1825-1832
Author(s):  
Yang Zheng ◽  
Jianmin Zhang
Keyword(s):  
Heavy Metals ◽  
Water Environment ◽  
Urban Water ◽  
Environment Pollution ◽  
Adsorption Effect ◽  
Retention System ◽  
Dynamic Experiments ◽  
Matrix Modification ◽  
Dissolved Heavy Metals ◽  
Sand Filler

Abstract Bioretention system is an effective way to solve the problem of urban water environment pollution. In this paper, the difficulty of the existing biological retention system to effectively remove dissolved heavy metals was studied. By comparing the adsorption effect of acid quartz sand filler layers with nano-hydroxyapatite (N-HAP), medical stone, nano-carbon, and biochar, the conclusion is drawn from the static and cylinder dynamic experiments that N-HAP has the best effect of removing Cu2+ and Zn2+, and the effect is long lasting. The scanning electron microscopy results showed that the N-HAP particles were rough and the surface was more rod-shaped, which increased the specific surface area of the N-HAP particles, promoted the complexation and electrostatic interaction of the additives and heavy metal solutions, and facilitated the adsorption of heavy metals. The research results help to improve the technology of filler matrix modification.

scholarly journals Levels of heavy metals in wastewater and soil samples from open drainage channels in Nairobi, Kenya: community health implication

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Geoffrey K. Kinuthia ◽  
Veronica Ngure ◽  
Dunstone Beti ◽  
Reuben Lugalia ◽  
Agnes Wangila ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Community Health ◽  
Soil Samples ◽  
Open Drainage ◽  
Health Implication ◽  
Drainage Channels

scholarly journals Can thiol compounds be used as biomarkers of aquatic ecosystem contamination by cadmium?

2009 ◽  
Vol 2 (3) ◽  
pp. 177-183 ◽  
Author(s):  
Jana Kovářová ◽  
Zdeňka Svobodová
Keyword(s):  
Water Pollution ◽  
Heavy Metals ◽  
Molecular Mass ◽  
Aquatic Ecosystem ◽  
Anthropogenic Activities ◽  
Aquatic Organisms ◽  
Trophic Levels ◽  
Aquatic Animals ◽  
Thiol Compounds ◽  
Potential Use

Can thiol compounds be used as biomarkers of aquatic ecosystem contamination by cadmium?Due to anthropogenic activities, heavy metals still represent a threat for various trophic levels. If aquatic animals are exposed to heavy metals we can obviously observe considerable toxicity. It is well known that an organism affected by cadmium (Cd) synthesize low molecular mass thiol compounds rich in cysteine (Cys), such as metallothioneins (MT) and glutathione (GSH/GSSG). The aim of this study was to summarize the effect of Cd on level of thiol compounds in aquatic organisms, and evaluate that the concentrations of thiol compounds are effective indicators of Cd water pollution and explain their potential use in biomonitoring applications.

Inventory of heavy metals and organic micropollutants In an urban water catchment drainage basin

Hydrobiologia ◽  
1992 ◽  
Vol 235-236 (1) ◽  
pp. 669-674 ◽  
Author(s):  
Sukiman Sarmani ◽  
Md. Pauzi Abdullah ◽  
Ibrahim Baba ◽  
Amran Abd. Majid
Keyword(s):  
Heavy Metals ◽  
Drainage Basin ◽  
Urban Water ◽  
Organic Micropollutants ◽  
Water Catchment
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