scholarly journals ZnO/Ag3PO4 and ZnO–Malachite as Effective Photocatalysts for the Removal of Enteropathogenic Bacteria, Dyestuffs, and Heavy Metals from Municipal and Industrial Wastewater

Water ◽  
2021 ◽  
Vol 13 (16) ◽  
pp. 2264
Author(s):  
Julie Joseane Murcia ◽  
Juan Sebastián Hernandez ◽  
Hugo Rojas ◽  
María Helena Brijaldo ◽  
Andrés Noel Martín-Gómez ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Industrial Wastewater ◽  
Municipal Wastewater ◽  
Detrimental Effect ◽  
Phosphate Content ◽  
Industrial Wastewaters ◽  
Silver Phosphate ◽  
Enteropathogenic Bacteria ◽  
Determining Factors ◽  
Mining Wastewater

Different composites based on ZnO/Ag3PO4 and ZnO–malachite (Cu2(OH)2CO3) were synthesized in order to determine their effectiveness in the treatment of municipal and industrial wastewaters (mainly polluted by enteropathogenic bacteria, dyes, and heavy metals). The addition of Ag3PO4 and malachite did not significantly modify the physicochemical properties of ZnO; however, the optical properties of this oxide were modified as a result of its coupling with the modifiers. The modification of ZnO led to an improvement in its effectiveness in the treatment of municipal and industrial wastewater. In general, the amount of malachite or silver phosphate and the effluent to be treated were the determining factors in the effectiveness of the wastewater treatment. The highest degree of elimination of bacteria from municipal wastewater and discoloration of textile staining wastewater were achieved by using ZnO/Ag3PO4 (5%), but an increase in the phosphate content had a detrimental effect on the treatment. Likewise, the highest Fe and Cu photoreduction from coal mining wastewater was observed by using ZnO–malachite (2.5%) and ZnO/Ag3PO4 (10%), respectively. Some of the results of this work were presented at the fourth Congreso Colombiano de Procesos Avanzados de Oxidación (4CCPAOx).

Management and Status of Japanese Public Waters

1991 ◽  
Vol 23 (1-3) ◽  
pp. 1-10 ◽  
Author(s):  
Takeshi Goda
Keyword(s):  
Water Quality ◽  
Coastal Waters ◽  
Industrial Wastewater ◽  
Quality Standards ◽  
Water Bodies ◽  
Industrial Wastewaters ◽  
Quality Of Water ◽  
Japanese Rivers ◽  
Per Capita

The management and status of public water bodies in Japan is discussed. The environmental quality standards which have been set and the levels of compliance with these standards are shown. The water quality of Japanese rivers, lakes, reservoirs, wetlands and coastal waters is described, and eutrophication problems are mentioned. The effects of changes in population density and levels of recycling of industrial wastewaters on the quality of water bodies are discussed. Almost 75% of industrial wastewater is now recycled. Per capita availability of freshwater in Japan is comparatively low, and the construction of 530 dams, in addition to the 2393 dams already in operation, is planned. Irrigation effluents from paddy fields are a major factor which influences river water quality in Japan. The improvement of water quality using various methods is discussed.

Technological Trends in Heavy Metals Removal from Industrial Wastewater: A Review

2021 ◽  
pp. 105688
Author(s):  
Rakesh Shrestha ◽  
Sagar Ban ◽  
Sijan Devkota ◽  
Sudip Sharma ◽  
Rajendra Joshi ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Industrial Wastewater ◽  
Heavy Metals Removal ◽  
Metals Removal

Effects of ectoparasites on breeding success of great tits (Parus major) and pied flycatchers (Ficedula hypoleuca) in an air pollution gradient

1994 ◽  
Vol 72 (4) ◽  
pp. 624-635 ◽  
Author(s):  
Tapio Eeva ◽  
Esa Lehikoinen ◽  
Jorma Nurmi
Keyword(s):  
Heavy Metals ◽  
Air Pollution ◽  
Breeding Success ◽  
Detrimental Effect ◽  
Bird Species ◽  
Parus Major ◽  
Ficedula Hypoleuca ◽  
Nest Size ◽  
Minor Importance ◽  
Ceratophyllus Gallinae

Numbers of ectoparasitic blow fly (Protocalliphora azurea) larvae (Diptera: Calliphoridae), adult and larval hen fleas, Ceratophyllus gallinae (Siphonaptera: Ceratophyllidae), and other nest-dwelling insects were counted from the nests of the great tit, Parus major, and the pied flycatcher, Ficedula hypoleuca, in southwestern Finland around a factory complex emitting large quantities of sulphuric oxides and heavy metals. Protocalliphora azurea larvae were more frequently found in the nests of P. major than in those of F. hypoleuca. The prevalence of P. azurea larvae tended to be lower in polluted areas. The number of P. azurea larvae correlated positively with nest size and brood size of P. major. This may be caused by difficulties in sanitation of large and crowded nests. The numbers of fleas and their larvae were negatively affected by moisture in the nests. Nests of F. hypoleuca contained more adult fleas in polluted areas. This may indicate reduced resistance of birds exposed to heavy metals, but other possibilities are also discussed. We found a detrimental effect of P. azurea larvae on the growth of P. major nestlings, and an effect of fleas on mortality of F. hypoleuca nestlings, but these effects were not enhanced by air pollution. We conclude that the ectoparasites studied, at densities observed in our study area, are of minor importance in determining the breeding success of these two bird species.

Treatment of metal wastewater in pilot-scale packed bed systems: efficiency of single- vs. mixed-mushrooms

RSC Advances ◽  
2015 ◽  
Vol 5 (37) ◽  
pp. 29145-29152 ◽  
Author(s):  
Yunchuan Long ◽  
Qiao Li ◽  
Jiangxia Ni ◽  
Fei Xu ◽  
Heng Xu
Keyword(s):  
Heavy Metals ◽  
Industrial Wastewater ◽  
Packed Bed ◽  
Pilot Scale ◽  
Biosorption Of Heavy Metals

This study investigated the biosorption of heavy metals from industrial wastewater using mushrooms at small-sized pilot-scale.

Assessment of Heavy Metals Pollution in Sediments from Aha Lake, China

2012 ◽  
Vol 554-556 ◽  
pp. 1913-1918
Author(s):  
Feng Liu ◽  
Ji Wei Hu ◽  
Xian Fei Huang ◽  
Jing An Chen ◽  
Li Ya Fu ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Industrial Effluent ◽  
Principal Component ◽  
Secondary Phase ◽  
Primary Phase ◽  
Point Source Pollution ◽  
Residual Phase ◽  
Heavy Metals Contamination ◽  
Mining Wastewater ◽  
Aha Lake

Assessment of the pollution for the selected six heavy metals (Pb, Cu, Zn, Fe, Mn and Ni) in ten surface sediments sampled from Aha Lake in a dry season was made in the present investigation. Principal component analysis (PCA) was used to assess the sources of the heavy metals contamination and two components were extracted. Analysis of the lake characteristics and point source pollution revealed that the discharge of industrial effluent and coal mining wastewater were the possible sources of these heavy metals contamination. Based on the speciation characteristics of heavy metals in sediments, the method ratio of secondary phase to primary phase (RSP) was applied to evaluate the loadings and the bioavailability of these heavy metals. The RSP evaluation exhibited that Pb, Zn, Fe, Mn and Ni were mainly associated with Fe-Mn oxides besides residual phase, while Cu mainly existed in organic phase and residual phase. In summary, the potential risk posed to the lake caused by the heavy metals was high and descended in the order of Mn > Ni > Zn > Pb > Cu > Fe.

Assessment of Heavy Metals in Pharmaceutical Industrial Wastewater of Pharmacity, Selaqui, Dehradun, Uttarakhand, India

2014 ◽  
Vol 4 (1) ◽  
pp. 29-39 ◽  
Author(s):  
Rajender Singh Rana ◽  
Vikash Kandari ◽  
Prashant Singh ◽  
Sanjay Gupta
Keyword(s):  
Heavy Metals ◽  
Industrial Wastewater

scholarly journals Microalgae as biological treatment for municipal wastewater – effects on the sludge handling in a treatment plant

2018 ◽  
Vol 78 (3) ◽  
pp. 644-654 ◽  
Author(s):  
J. Olsson ◽  
S. Schwede ◽  
E. Nehrenheim ◽  
E. Thorin
Keyword(s):  
Heavy Metals ◽  
Activated Sludge ◽  
Biological Treatment ◽  
Municipal Wastewater ◽  
Treatment Plant ◽  
Waste Activated Sludge ◽  
Activated Sludge Process ◽  
Primary Sludge ◽  
Thermophilic Conditions ◽  
Mesophilic Conditions

Abstract A mix of microalgae and bacteria was cultivated on pre-sedimented municipal wastewater in a continuous operated microalgae-activated sludge process. The excess material from the process was co-digested with primary sludge in mesophilic and thermophilic conditions in semi-continuous mode (5 L digesters). Two reference digesters (5 L digesters) fed with waste-activated sludge (WAS) and primary sludge were operated in parallel. The methane yield was slightly reduced (≈10%) when the microalgal-bacterial substrate was used in place of the WAS in thermophilic conditions, but remained approximately similar in mesophilic conditions. The uptake of heavy metals was higher with the microalgal-bacterial substrate in comparison to the WAS, which resulted in higher levels of heavy metals in the digestates. The addition of microalgal-bacterial substrate enhanced the dewaterability in thermophilic conditions. Finally, excess heat can be recovered in both mesophilic and thermophilic conditions.

scholarly journals B-Cyclodextrin Polyurethanes Copolymerised with Beetroot Fibers (Bio-Polymer), for the Removal of Organic and Inorganic Contaminants from Water

2013 ◽  
Vol 2 (1) ◽  
pp. 150 ◽  
Author(s):  
Jamil Rima ◽  
Karine Assaker
Keyword(s):  
Heavy Metals ◽  
Methylene Blue ◽  
Polycyclic Aromatic Hydrocarbons ◽  
Water Treatment ◽  
Aromatic Hydrocarbons ◽  
Rhodamine B ◽  
Industrial Wastewater ◽  
Contaminated Groundwater ◽  
Inorganic Contaminants ◽  
Polycyclic Aromatic

<p>In this study, B-Cyclodextrinn polymerized with beetroot fibers (Bio-polymer), was prepared and applied to the removal of organic and inorganic contaminants from wastewater. An investigation into the use of cross-linked cyclodextrin polyurethanes copolymerised with beetroot fibers as adsorbents for organic pollutants and heavy metals has yielded very useful results which may have an impact in future water treatment applications.</p> The Biopolymer was tested in water contaminated by dyes, polycyclic aromatic hydrocarbons (PAH) and heavy metals. The effectiveness to eliminate dyes such as methylene blue and Rhodamine B with concentrations around 100 ppm was more than 99%, while the pyrene,which was chosen as an example among PAHs, showed a potential of elimination exceeding the 97% for solutions of 10 ppm. Also, heavy metals, such as Lead, Zn, and Cu, were tested and showed an efficacy exceeding the 99.8%. The results indicated that the biopolymer developed in this study has the potential to be a promising material for the removal of mixed pollutants from industrial wastewater or from contaminated groundwater.

scholarly journals Impact of sludge and wastewater on Lactuca sativa L. growth and on soil pollution

2015 ◽  
Vol 17 (1) ◽  
pp. 148-161
Keyword(s):  
Heavy Metals ◽  
Soil Pollution ◽  
Plant Height ◽  
Lactuca Sativa ◽  
Dry Matter ◽  
Municipal Wastewater ◽  
Pollution Load Index ◽  
Dry Matter Yield ◽  
Pollution Load ◽  
Treated Municipal Wastewater

<div> <p>Two greenhouse pot experiments were conducted in Agrinion, Greece. The impact of treated municipal wastewater (TMWW) and sludge (i) on the growth of <em>Lactuca sativa</em> L. var Longifolia (lettuce) and (ii) on the extent of soil pollution with heavy metals was studied. Soil pollution was assessed by calculating the Pollution Load Index (PLI). Both of these experiments were conducted, using a randomized block design in four replications and seven treatments, respectively, as follows: (a) Experiment A: study of the effect of treated municipal wastewater (TMWW): [Control, 20%, 40%, 60%, 80%, 100%, (100%+30 t/ha Sludge)] and (b) Experiment B: Study of the effect of sludge (t/ha): 0, &nbsp;6, 12,&nbsp; 18, 24 , 30, (30+100%TMWW). The sludge affected significantly plant height and fresh and dry matter yield, as well as the dry matter N content of plants, while the TMWW affected significantly the dry matter yield and non-significantly the plant height. The pollution load index (PLI) was non-significant for both treatments (sludge and TMWW). According to PLI calibration scale, the soil was found to be slightly polluted with heavy metals under both treatments.</p> </div> <p>&nbsp;</p>

Sign in / Sign up

Export Citation Format

Share Document