BIOMATERIALS AS ADSORBENTS FOR METAL(LOID) WATER POLLUTANTS

2017 ◽  
Author(s):  
Lucia Kořenková ◽  
Martin Urík
Keyword(s):  
Aqueous Solutions ◽  
Case Studies ◽  
Removal Efficiency ◽  
Toxic Metals ◽  
Toxic Metal ◽  
Theoretical Knowledge ◽  
Metals And Metalloids ◽  
Water Pollutants ◽  
Original Idea

The original idea of this scientific monograph was to provide information on current theoretical knowledge on biosorption, including evaluation of toxic metal(loid)s’ removal efficiency from aqueous solutions by various biosorbents which were employed in recent studies. However, our publication is going a step further in order to help the reader to comprehend the extent and complexity of biosorption research. Here, we also provide five experimental case studies which evaluate the biosorption of toxic metals and metalloids from different perspectives applying various types of biomass.

A study on the removal of toxic metal-EDTA complex using solar light/TiO2 system

2002 ◽  
Vol 2 (1) ◽  
pp. 299-304 ◽  
Author(s):  
I.-H. Cho ◽  
T.-J. Park ◽  
H.-Y. Kim ◽  
K.-D. Zoh ◽  
H.-K. Lee
Keyword(s):  
Heavy Metal ◽  
Removal Efficiency ◽  
Toxic Metals ◽  
Toxic Metal ◽  
Solar Light ◽  
Edta Complex ◽  
Tio2 Photocatalysis ◽  
Natural Sunlight ◽  
Photocatalytic Removal

A circular reactor was placed outdoors to investigate the possibility of using natural sunlight in TiO2 photocatalysis system for the removal of toxic metals (Cd, Cr, Cu, Hg, Ni, Zn) and EDTA complex. The results show that the system containing both solar light and TiO2 more effectively removed metal-EDTA complex than either solar light or TiO2 system alone. The removal of each metal was more than 90% in the presence of TiO2/solar light, and EDTA (TOC basis) was reduced more than 80% in 120 min. Photocatalytic removal efficiency of heavy metal-EDTA increased with increasing TiO2 dosage. However, over 1.5g/L of TiO2 dosage, the efficiency reached a plateau.

scholarly journals Spatial distribution and risk assessment of toxic metals in agricultural soils from endemic nasopharyngeal carcinoma region in South China

2020 ◽  
Vol 12 (1) ◽  
pp. 568-579
Author(s):  
Liping Mo ◽  
Yongzhang Zhou ◽  
Gnanachandrasamy Gopalakrishnana ◽  
Xingyuan Li
Keyword(s):  
Nasopharyngeal Carcinoma ◽  
South China ◽  
Toxic Metals ◽  
Agricultural Soils ◽  
Hazard Index ◽  
Toxic Metal ◽  
Carcinogenic Risk ◽  
Pollution Indices ◽  
High Incidence ◽  
Low Incidence

AbstractSihui city (South China) is much affected by nasopharyngeal carcinoma (NPC). To investigate the relationships between the toxic metals in soil and NPC incidence in Sihui, 119 surface soil samples were collected from agricultural fields and analyzed. The soil As–Cr contents in Longjiang (high-incidence area) are significantly lower than those in Weizheng and Jianglin (low-incidence areas), whereas the soil Pb content in Longjiang is significantly higher than that in Weizheng. The Nemerow pollution indices (PIN) of soils decrease in the order of Jianglin > Weizheng > Longjiang. The enrichment factor (EF) of Cd indicates that the Cd enrichment is contributed by human activities. Potential toxic metal-related ecological risk values decrease in the order of Jianglin > Weizheng > Longjiang. The mean hazard index (HI) value of Longjiang was lower than those of Weizheng and Jianglin. There are no adverse noncarcinogenic health effects of soil toxic metals to adults in the study areas. Carcinogenic risks of As and Cr via ingestion and dermal contact and total carcinogenic risk are within the warning range, from 10−6 to 10−4. Hence, we suggest that toxic metals in the soil may not be major geochemical carcinogenic factors of high NPC incidence in Sihui.

Biochar Assisted Remediation of Toxic Metals and Metalloids

2021 ◽  
pp. 131-162
Author(s):  
Shalini Dhiman ◽  
Mohd Ibrahim ◽  
Kamini Devi ◽  
Neerja Sharma ◽  
Nitika Kapoor ◽  
...  
Keyword(s):  
Toxic Metals ◽  
Metals And Metalloids

Removal of Toxic Metal Ions from Solutions Using Industrial Solid Byproducts

1993 ◽  
Vol 27 (10) ◽  
pp. 83-93 ◽  
Author(s):  
A. I. Zouboulis ◽  
K. A. Kydros ◽  
K. A. Matis
Keyword(s):  
Toxic Metals ◽  
Toxic Metal ◽  
Industrial Wastes ◽  
Mineral Particles ◽  
Solid Adsorbent ◽  
Metals Removal ◽  
Environmental Considerations ◽  
Solid Liquid ◽  
Solid Liquid Separation ◽  
By Products

Nowadays the problem of industrial wastes handling and disposal is increasing continuously, as more strict environmental considerations have to be taken into account. In this paper, selected experimental results are presented from our current research in toxic metals removal (e.g. Cu, Pb, As), related to the applications of mineral particles as by-products (red mud, pyrite, dolomite, etc.) for the induced removal of toxic metals from aqueous solutions. These by-products, existing in finely divided form and considered rather as solid industrial wastes, have been used as a cheap solid adsorbent or substrate. Appropriate methods for the subsequent solid/liquid separation were examined, among them flotation. Different parameters were tested and high removals of toxic metals were achieved. In this way, a useful application may be realized for the waste mineral particles.

scholarly journals Evaluation of Malathion Pesticide Removal Efficiency by g-C3N4/ Fe3O4/Ag Nanocomposites from Aqueous Solutions in the Presence of UV Irradiation

2020 ◽  
Vol 7 (3) ◽  
pp. 261-279
Author(s):  
Ali Esrafili ◽  
Soudabeh Ghodsi ◽  
Roshanak Rezaei Kalantary ◽  
Mitra Gholami ◽  
◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Removal Efficiency ◽  
Uv Irradiation ◽  
Pesticide Removal

scholarly journals Effect of Praestol as a Coagulant-Aid to Improve Coagulation-Flocculation in Dye containing Wastewaters

2015 ◽  
Vol 18 (1) ◽  
pp. 38-46 ◽  
Keyword(s):  
Ionic Strength ◽  
Aqueous Solutions ◽  
Removal Efficiency ◽  
Dye Removal ◽  
Settling Time ◽  
Solution Ph ◽  
Polyaluminum Chloride ◽  
Flocculation Process ◽  
Flocculation Time

<div> <p>This study was conducted to investigate the effect of praestol, as a coagulant-aid, to improve coagulation-flocculation process in the removal of disperse red 60 from aqueous solutions. The effect of various parameters including coagulants dose (10-1000 mg l<sup>-1</sup>), praestol dose (0-1000 mg l<sup>-1</sup>), solution pH (3-11), initial dye concentration (100-500 mg l<sup>-1</sup>), flocculation speed (30-60 rpm), flocculation time (15-30 min), settling time (5-60 min) and ionic strength (0-6 mg l<sup>-1</sup>) was evaluated on the dye removal. The dye removal efficiency was substantially increased by using praestol in the concentration of 80 mg l<sup>-1 </sup>and 400 mg l<sup>-1 </sup>for coagulation with alum and polyaluminum chloride (PACl), respectively. The maximum dye removal by alum coupled with praestol (Al-P) and PACl coupled with praestol (PA-P) was found to be 97.8% and 98.7%, respectively that were occurred at pH 7. The results showed that the application of PA-P or Al-P can be effectively used to remove disperse red 60 (DR 60) in aqueous solutions.</p> </div> <p>&nbsp;</p>

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