scholarly journals Phytoremediation of emulsion paint wastewater using Azolla Pinnata, Eichhornia Crassipes and Lemna Minor

2021 ◽  
Vol 40 (3) ◽  
pp. 550-557
Author(s):  
E.A. Echiegu ◽  
C.O. Ezimah ◽  
M.E. Okechukwu ◽  
O.A. Nwoke
Keyword(s):  
Eichhornia Crassipes ◽  
Lemna Minor ◽  
Physicochemical Characteristics ◽  
Treated Wastewater ◽  
Preliminary Treatment ◽  
Azolla Pinnata ◽  
Heavy Metal Concentrations ◽  
Emulsion Paint ◽  
Before And After ◽  
Test Plants

The use of three macrophytes namely Azolla pinnata, Eichhornia crassipes and Lemna minor for the phytoremediation of emulsion paint wastewater was investigated. Samples of the paint wastewater and test plants were collected and analyzed for physicochemical characteristics and heavy metal concentrations before and after phytoremediation for six weeks. The TDS of the treated wastewater was reduced by over 80.0% by each of the test plants while the TSS increased as a result of debris from withered test plants. Dissolved oxygen reduction ranged from 12.5% to 50.0%, COD from 49.5% to 57.1%, BOD from 46.7% to 54.7, heavy metals from 11.0 to 92.5%. A. pinnata appears to have performed significantly better (P < 0.05) than the other plants followed by E. crassipies and L. minor. It can be concluded that the test plants (especially A. pinnata) can be effectively used for the preliminary treatment of paint wastewater.

scholarly journals Toxicity Evaluation of Pesticide Industry Wastewater through Fish Bioassay

2016 ◽  
Vol 3 (3) ◽  
Author(s):  
Dr. Mrinmayi Chavan ◽  
Dr. N. P. Thacker ◽  
Dr. J. L. Tarar
Keyword(s):  
Physicochemical Parameters ◽  
Point Sources ◽  
Treated Wastewater ◽  
Preliminary Treatment ◽  
Agricultural Field ◽  
Sulphide Concentration ◽  
Guideline Values ◽  
Before And After ◽  
Agricultural Industries ◽  
Industry Effluent

<div><p><em>Besides pesticides contamination from agricultural field, the agricultural industries are also contributing by relatively high quantities of toxic pesticides into the environment. </em><em>Considering the high pollution potential of the Pesticide formulation industry which is one of the main point sources of water pollution, toxicity study was conducted. In this study, the toxicity of the wastewater before and after preliminary treatment is checked using fish bioassay on Lebistus reticulate, with the analysis of physicochemical parameters and OCPs concentration. The results indicated exceeding values of the physicochemical parameters than the guideline values (CPCB). Wastewater exerted more toxicity due to the presence of high OCPs i.e. 1.719 mg/l; equally sulphide concentration was 17.60 mg/l which is also higher compared to stipulated standard of 2.0 mg/l, which causes odor to the surrounding environment. It also contained oil/grease up to 80 mg/l. Treated wastewater was also detected with the concentration (0.587 mg/l) of OCPs higher than the standard values prescribed by CPCB for the pesticide industry effluent discharge. The study inferred that raw wastewater was very toxic to the fish Lebistus reticulate whereas, preliminary treatment to the effluent had reduced toxicity to certain extent, but it doesn’t solve a purpose and hence needs correction in the pretreatment method. </em></p></div>

scholarly journals A Scientometric Study on Industrial Effluent and Sludge Toxicity

Toxics ◽  
2021 ◽  
Vol 9 (8) ◽  
pp. 176
Author(s):  
Amid Mostafaie ◽  
Diogo N. Cardoso ◽  
Mohammadreza Kamali ◽  
Susana Loureiro
Keyword(s):  
Industrial Wastewater ◽  
Web Of Science ◽  
Industrial Effluent ◽  
Toxicity Assessment ◽  
Complex Compounds ◽  
Treated Wastewater ◽  
Scientometric Analysis ◽  
Water Medium ◽  
Before And After ◽  
Scientometric Study

The growth of industrialization has led to an increase in the production of highly contaminated wastewater. Industrial wastewater contains highly complex compounds varying in characteristics and required to be treated before its discharge into a water medium from various industries. However, the efficiency of the treated wastewater from the toxicity reduction perspective is unclear. In order to overcome this barrier, toxicity assessment of the industrial wastewater before and after treatment is crucial. Thus, in this study, a scientometric analysis has been performed on the toxicity assessment of industrial wastewater and sludges, which have been reported in the literature. Web of Science (WoS) core collection database has been considered the main database to execute this analysis. Via the search of pre-researched keywords, a total number of 1038 documents were collected, which have been published from 1951 to 2020. Via CiteSpace software and WoS analyser, these documents went under analysis regarding some of the scientometry criteria, and the detailed results obtained are provided in this study. The total number of published documents on this topic is relatively low during such a long period of time. In conclusion, the need for more detailed contributions among the scientific and industrial communities has been felt.

scholarly journals Potentially Infectious Novel Hepatitis A Virus Strains Detected in Selected Treated Wastewater Discharge Sources, South Africa

Viruses ◽  
2020 ◽  
Vol 12 (12) ◽  
pp. 1468
Author(s):  
Saïd Rachida ◽  
Maureen Beatrice Taylor
Keyword(s):  
South Africa ◽  
Hepatitis A ◽  
Hepatitis A Virus ◽  
Wastewater Treatment Plants ◽  
Treated Wastewater ◽  
Wastewater Discharge ◽  
Public Health Importance ◽  
Symptomatic Disease ◽  
Before And After ◽  
Amino Acid Mutations

Hepatitis A virus (HAV) is a waterborne pathogen of public health importance. In South Africa (SA), unique HAV subgenotype IB strains have been detected in surface and wastewater samples, as well as on fresh produce at the point of retail. However, due to the use of molecular-based assays, the infectivity of the detected strains was unknown. Considering the potential shift of HAV endemicity from high to intermediate, which could increase the risk of severe symptomatic disease, this study investigated the identity of HAV strains detected before and after viability treatment of selected wastewater discharge samples. For one year, 118 samples consisting of sewage, treated wastewater discharge and downstream dam water were collected from five wastewater treatment plants (WWTP 1, 2, 3, 4 and 5). Unique HAV IB strains were detected in samples from all five WWTPs, with 11 of these strains carrying amino acid mutations at the immunodominant and neutralisation epitopes. A quasispecies dynamic of HAV has also been detected in sewage samples. The subsequent application of viability PCR revealed that potentially infectious HAV strains were discharged from WWTP 1, 2, 4 and 5 into the dam. Therefore, there is a potential risk of HAV exposure to communities using water sources downstream the WWTPs.

scholarly journals Potencial de plantas acuáticas para la remoción de coliformes totales y Escherichia coli en aguas negras

Enfoque UTE ◽  
2018 ◽  
Vol 9 (4) ◽  
pp. 131-144
Author(s):  
R León ◽  
Beatriz Margarita Pernía Santos ◽  
Rosa Siguencia ◽  
S Franco ◽  
A Noboa ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Eichhornia Crassipes ◽  
Lemna Minor ◽  
Pistia Stratiotes ◽  
Azolla Caroliniana ◽  
E Coli

El objetivo de la investigación fue encontrar plantas acuáticas con potencial de remover E. coli y coliformes totales de agua contaminada. Para ello, se realizaron muestreos en Río Guayas, Recinto Aguas Frías y Estero Peñafiel, donde se seleccionaron las especies: Azolla caroliniana, Eichhornia crassipes, Pistia stratiotes, Salvinia auriculata y Lemna minor (Control positivo). Las plantas se reprodujeron in vitro y se realizaron bioensayos para verificar su capacidad de remover E. coli y coliformes. Los ensayos se realizaron por triplicado en 0,5 L de agua con fertilizante y se inoculó una cepa de referencia E. coli ATCC25922.  Como control negativo se inoculó la bacteria sin plantas y control positivo con la planta Lemna sp. Después de 7 días se determinó la carga bacteriana remanente. Se encontró un porcentaje de eliminación de E. coli de 99% para A. caroliniana, E. crassipes y Lemna sp. y de 100% para P. stratiotes y S. auriculata. Posteriormente, se realizaron ensayos con aguas negras en los cuales S. auriculata y A. caroliniana lograron el 100% de remoción de las coliformes y E. coli el resto de plantas tuvieron niveles menores de eficiencia. Se propone el uso de estas especies para el tratamiento de aguas contaminadas. 

scholarly journals Degradation Studies of Selected Bisphenols in the Presence of β-Cyclodextrin and/or Duckweed Water Plant

2020 ◽  
Vol 103 (2) ◽  
pp. 439-448
Author(s):  
Aleksandra Kaleniecka ◽  
Paweł K Zarzycki
Keyword(s):  
Green Chemistry ◽  
Lemna Minor ◽  
Aquatic Organisms ◽  
Treated Wastewater ◽  
Biological Research ◽  
Data Set ◽  
Active Biomass ◽  
Treatment Processes ◽  
Water Plant ◽  
Interesting Alternative

Abstract Background: This research reports a multivariate experiment enabling observation of the potential application of macrocyclic compound [β-cyclodextrin (β-CD)] and/or duckweed organisms as the active factors for elimination of selected bisphenols A, B, and S from water samples. Objective: Target bisphenols selection was based on observation that such components can be present in food or environmental samples (e.g., vegetable/fruit juices, milk, drinking water, or treated wastewater). Methods: Biological research was carried out using aquatic organisms containing chlorophyll, particularly duckweed (Lemna minor L), that may work as an active biomass for the elimination or extraction of bisphenols micropollutants from water. Using such a system, we studied the potential encapsulation effect and removal efficiency of nontoxic macrocyclic oligosaccharide (β-cyclodextrin) acting as an encapsulation reagent to promote the removal of selected bisphenols from liquid phase both with and without the presence of duckweed biomass. Results: Experimental data have revealed that β-CD or combined β-CD/duckweed system has an effect on bisphenols elimination from water. The initial data set obtained from this preliminary experiment (and combined with supramolecular complex formation data calculated from chromatographic experiments, published previously) enables designing of further experiments focusing on the development of green chemistry technology. Conclusions: It is hoped that this may be used for the efficient removal of low-molecular-mass micropollutants using classical technological wastewater treatment processes modified by biomass and macrocyclic additives. This process needs to be optimized, but the results presented have revealed that such green chemistry technology, if successful, may be an interesting alternative for the selective removal of the micropollutants investigated from wastewater using classical adsorbents (e.g., carbons and carbon-related nanomaterials), particularly in terms of the worldwide problem with microplastic pollutants in the environment and food products.

Preliminary investigations on reducing the high radiation risk level of TENORM scale waste from petroleum industry

2018 ◽  
Vol 106 (9) ◽  
pp. 793-800 ◽  
Author(s):  
Mohamed F. Attallah ◽  
Moustafa A. Hilal ◽  
Yasser T. Mohamed
Keyword(s):  
Radiation Risk ◽  
Petroleum Industry ◽  
Physicochemical Characteristics ◽  
Pilot Scale ◽  
Total Radioactivity ◽  
Risk Level ◽  
High Radiation ◽  
Economic Process ◽  
Before And After

Abstract The main objective of this study is directed to remove 226Ra, 228Ra radionuclides from TENORM scale waste without seriously degradation the physicochemical characteristics of soils or generating waste. It was found that 82, 87% removal of total radioactivity using successive washing by commercial and TX-100 solutions, respectively, after seven cycles. Some radiation risk before and after treatment with surfactants were determined. It is a promising and efficient as well as economic process. Our results from this task could provide a useful information for defining the establishing and operating on a pilot-scale plant for efficient and economic TENORM treatment.

Estrogen-like and dioxin-like organic contaminants in reclaimed wastewater: transfer to irrigated soil and groundwater

2011 ◽  
Vol 63 (8) ◽  
pp. 1657-1662 ◽  
Author(s):  
O. Mahjoub ◽  
A. Escande ◽  
D. Rosain ◽  
C. Casellas ◽  
E. Gomez ◽  
...  
Keyword(s):  
Organic Compounds ◽  
Organic Contaminants ◽  
Wastewater Reuse ◽  
Treated Wastewater ◽  
Reclaimed Wastewater ◽  
Aryl Hydrocarbon ◽  
Treated Wastewater Reuse ◽  
Before And After ◽  
Estradiol Equivalent ◽  
Irrigated Soils

In semi-arid regions, treated wastewater reuse for irrigation is a common practice since wastewater is considered as a non negligible water resource in these areas. However, treated wastewater contains traces of organic compounds which may contaminate the receiving environment i.e. soil and groundwater. Some of these organic compounds have the ability to bind to estrogen receptor (ER) or dioxin receptor (AhR, aryl hydrocarbon receptor). The fate of these compounds in effluent reused for irrigation, irrigated soils and groundwater is not well addressed yet. In the present study, estrogenic and dioxin-like activities were studied in three media: i) effluents reused for irrigation, ii) soils samples collected from the reclaimed water irrigated plot during six month irrigation, and iii) groundwater sampled before and after irrigation periods. Effluents reused for irrigation exhibited ER and AhR activities at 38.5±9.9 ng estradiol-equivalent/L (ng E2-EQ/L) and 113.3±27.7 ng dioxin-equivalent/L (ng TCDD-EQ/L), respectively. Soils showed ER activity (0.05 ng E2-EQ/g) only after 4 months of irrigation. AhR activities detected in all soil samples have not changed during irrigation. In groundwater, ER activities were detected in two piezometers indicating transfer of some estrogenic compounds.

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