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  1. Article: Urgent Needs to Consider and Assess the Transmission of Coronavirus (COVID-19) via Hospital Sewage and Wastewater

    Mandi, Laila

    Journal of Clinical & Experimental Investigations / Klinik ve Deneysel Arastirmalar Dergisi

    Abstract: The emergence and spread of SARS-CoV-2 responsible for COVID-19 disease are considered as a major threat to human health since WHO declared COVID-19 outbreak a global pandemic In recent studies, scientists confirmed the presence of SARS-CoV-2 RNA in ... ...

    Abstract The emergence and spread of SARS-CoV-2 responsible for COVID-19 disease are considered as a major threat to human health since WHO declared COVID-19 outbreak a global pandemic In recent studies, scientists confirmed the presence of SARS-CoV-2 RNA in feces of COVID-19 patients and wastewater In several areas, particularly low-income countries, hospital effluents are not disinfected or pretreated and they are mostly discharged into urban sewerage systems reaching wastewater treatment plants depending if it exists or not, consequently several infectious agents could be developed such as Coronavirus COVID-19 causing significant environmental and health risks Several researchers across the world suggested that wastewater surveillance could be a sensitive tool to monitor the circulation of the virus in the population and may represent a complementary approach to measure the presence and the prevalence of current infectious disease when the capacity for clinical testing is limited Only a few studies were done on the survival of Coronaviruses in wastewater and still there is limited information on its transmission potential through the environment Taking into account the current situation, there is an urgent need to consider and assess the transmission of Coronavirus (COVID-19) via hospital sewage and wastewater Further researches are imperative to fill the knowledge gaps in COVID-19 behavior in hospital and urban sewage, and wastewater treatment plants, identify the safety measures and better manage the pandemic phenomena [ABSTRACT FROM AUTHOR] Copyright of Journal of Clinical & Experimental Investigations / Klinik ve Deneysel Arastirmalar Dergisi is the property of Journal of Clinical & Experimental Investigations and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission However, users may print, download, or email articles for individual use This abstract may be abridged No warranty is given about the accuracy of the copy Users should refer to the original published version of the material for the full abstract (Copyright applies to all Abstracts )
    Keywords covid19
    Publisher WHO
    Document type Article
    Note WHO #Covidence: #828281
    Database COVID19

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  2. Article ; Online: Soil fertility and agro-physiological responses of maize (Zea mays) irrigated by treated domestic wastewater by hybrid multi-soil-layering technology.

    Zidan, Khadija / Mandi, Laila / Hejjaj, Abdessamad / Ouazzani, Naaila / Assabbane, Ali

    Journal of environmental management

    2023  Volume 351, Page(s) 119802

    Abstract: The depletion of water resources has gained global attention, particularly in arid climates, where there is growing interest in reusing treated wastewater for irrigation. This study focuses on the impact of irrigating treated wastewater using a hybrid ... ...

    Abstract The depletion of water resources has gained global attention, particularly in arid climates, where there is growing interest in reusing treated wastewater for irrigation. This study focuses on the impact of irrigating treated wastewater using a hybrid multi-soil-layering (MSL) technology on soil physicochemical properties and the agro-physiological characteristics of maize (Zea mays) cultivated in Morocco, a region characterized by arid conditions. To achieve this research goals, three plots were cultivated with Zea mays and subjected to irrigation with water of varying qualities: raw wastewater (RWW), treated wastewater (TWW), and well water (WW). This experiment ran for five months, covering one crop season. The physicochemical and microbiological parameters in the soil and water were investigated, and the agro-physiological characteristics of the maize crops were assessed. The findings revealed significant differences in physicochemical and microbial parameters within both water and soil, as well as in the physiological responses of the maize crop, among the three water treatments. TWW's quality met the permissible limits for direct wastewater discharge, as prescribed by Moroccan norms, making it suitable for potential irrigation reuse. Moreover, the higher content of key elements (Na, K, Ca, and Mg) in WW indicated that TWW was more suitable for irrigation. Zea mays irrigated with RWW and TWW exhibited a higher accumulation of protein and sugar content compared to WW irrigation. Furthermore, the biomass parameters, including root, aerial, and grain dry weight, showed a positive effect on Zea mays irrigated with RWW and TWW compared to WW. Total chlorophyll content, on the other hand, was highest in plants irrigated with WW, followed by TWW. Plants irrigated with RWW produced the highest amounts of nitrogen, phosphorus, and potassium. Conversely, plants irrigated with WW had a higher content of Ca, Na, and Mg. TWW yielded medium concentrations of N, P, K, Ca, Mg, and Na compared to RWW and WW, attributed to the nutrients provided by irrigation with TWW using the hybrid MSL technology. In conclusion, aside from their use as irrigation water, treated wastewater emerges as a valuable source of plant nutrients and soil fertilizers. They offer significant nutritive value, enhancing plant growth, reducing the need for additional fertilizer application, lowering mineral fertilization costs, and increasing the productivity of infertile soils. This highlights the potential of treated wastewater to improve agricultural sustainability in arid regions like Morocco.
    MeSH term(s) Wastewater ; Soil/chemistry ; Zea mays ; Agricultural Irrigation ; Technology ; Sodium
    Chemical Substances Wastewater ; Soil ; Sodium (9NEZ333N27)
    Language English
    Publishing date 2023-12-21
    Publishing country England
    Document type Journal Article
    ZDB-ID 184882-3
    ISSN 1095-8630 ; 0301-4797
    ISSN (online) 1095-8630
    ISSN 0301-4797
    DOI 10.1016/j.jenvman.2023.119802
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  3. Article ; Online: A critical review on using biochar as constructed wetland substrate: Characteristics, feedstock, design and pollutants removal mechanisms

    El Barkaoui, Sofiane / Mandi, Laila / Aziz, Faissal / Del Bubba, Massimo / Ouazzani, Naaila

    Ecological Engineering. 2023 May, v. 190 p.106927-

    2023  

    Abstract: Constructed wetlands (CWs) are constructed systems that simulate natural wetlands and can be used to treat wastewater from several sources of pollution through physical, chemical and biological depuration processes. This work aims to critically review ... ...

    Abstract Constructed wetlands (CWs) are constructed systems that simulate natural wetlands and can be used to treat wastewater from several sources of pollution through physical, chemical and biological depuration processes. This work aims to critically review the updated literature on constructed wetlands (CWs) integrating biochar in the substrate. In detail, the study focuses on the characteristics of biochar that are generally integrated into this treatment ecotechnology and the processes used to prepare the materials, including conditions of thermal conversion and the kind of feedstock used (e.g., agricultural, food, and wood wastes, sewage sludge and algal marine feedstock). Based on the literature review, it is found that the feedstock must be rich in carbon and low in the mineral matter to produce good quality biochar, i.e. large pore volume and high specific surface area, thus allowing to effectively remove pollutants from wastewater. The biochar quality is affected by the conditions involved in preparing biochars (e.g., pyrolysis temperature, heating rate and carbonization time). The properties of biochar used for wastewater treatment, the effect of its implementation as CW substrate and its treatment efficiency have also been described. Several factors alter the removal efficiency of pollutants in CWs, such as substrate chemical and physical properties, hydraulic retention time, oxygenation, and redox conditions in the reed bed. In addition, the mode by which biochar is implemented in the filter and the choice of macrophyte are crucial for regulating the efficiency of the treatment system. Phragmites australis was the most used plant in the previous studies because of its large advantages. Different configurations of CWs integrating biochar into the wetland as a filling medium, were reported and compared. In vertical flow CWs (VF-CWs), which are the system mostly investigated, several studies have shown that the optimal position for the biochar substrate is the intermediate one between two layers of inert materials, to avoid clogging of the filtration system or biochar flotation.
    Keywords Phragmites australis ; algae ; biochar ; carbon ; carbonization ; constructed wetlands ; depuration ; feedstocks ; filtration ; macrophytes ; pollution ; pyrolysis ; sewage sludge ; surface area ; temperature ; wastewater ; wastewater treatment ; wood ; Natural based solutions ; Sorbent materials ; Biomass thermal conversion ; Configuration of constructed wetlands ; Emerging contaminants
    Language English
    Dates of publication 2023-05
    Publishing place Elsevier B.V.
    Document type Article ; Online
    ZDB-ID 1127407-4
    ISSN 0925-8574
    ISSN 0925-8574
    DOI 10.1016/j.ecoleng.2023.106927
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  4. Article ; Online: Screening of new native metallophytes from copper abandoned mining site: Promising tool for phytoremediation

    Midhat, Laila / Ouazzani, Naaila / Aziz, Faissal / Esshaimi, Mouhsine / Hejjaj, Abdessamed / Mandi, Laila

    Land Degradation & Development. 2023 July 30, v. 34, no. 12 p.3700-3711

    2023  

    Abstract: A field survey on abandoned mining site ‘Bir Nehass‐Morocco’ was conducted to identify new native metallophytes as a promising tool for phytoremediation. The spatial distribution of metals in tailings and mining soils was investigated and metal ... ...

    Abstract A field survey on abandoned mining site ‘Bir Nehass‐Morocco’ was conducted to identify new native metallophytes as a promising tool for phytoremediation. The spatial distribution of metals in tailings and mining soils was investigated and metal accumulation in plant tissues was analyzed and compared. The results indicated that the studied area was polluted by Cu, Zn, Pb and Cd Cadmium with maximum values of 2892, 27868.3, 6982 and 63.03 mg.kg⁻¹, respectively, which are higher than background levels for agricultural soils. The concentrations of Cu, Zn, Pb and Cd decreased with the distance from the mine tailings. Thirteen species (11 families) were identified and mainly native and therophyte plants. Significant difference (p < 0.05) was observed among the average concentrations of metals in plant tissues and most values exceeded the normal concentration range. Based on the comparative analysis of heavy metals content, translocation and bioconcentration factors in plants, Aizoon canariense L, Hirschfeldia incana (L.) L. Fossat, Citrullus colocynthis (L.) Schrader and Peganum harmala L had a high accumulation ability and showed a remarkable phytoremediation potential which could be identified as promising candidates for phytoremediation techniques.
    Keywords Citrullus colocynthis ; Hirschfeldia incana ; Peganum harmala ; bioaccumulation ; cadmium ; copper ; hyperaccumulators ; land degradation ; phytoremediation ; surveys
    Language English
    Dates of publication 2023-0730
    Size p. 3700-3711.
    Publishing place John Wiley & Sons, Ltd.
    Document type Article ; Online
    Note JOURNAL ARTICLE
    ZDB-ID 1319202-4
    ISSN 1085-3278
    ISSN 1085-3278
    DOI 10.1002/ldr.4714
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  5. Article: Neural network and cubist algorithms to predict fecal coliform content in treated wastewater by multi‐soil‐layering system for potential reuse

    Sbahi, Sofyan / Ouazzani, Naaila / Hejjaj, Abdessamed / Mandi, Laila

    Journal of environmental quality. 2021 Jan., v. 50, no. 1

    2021  

    Abstract: This study aims to find the most accurate machine learning algorithms as compared to linear regression for prediction of fecal coliform (FC) concentration in the effluent of a multi‐soil‐layering (MSL) system and to identify the input variables affecting ...

    Abstract This study aims to find the most accurate machine learning algorithms as compared to linear regression for prediction of fecal coliform (FC) concentration in the effluent of a multi‐soil‐layering (MSL) system and to identify the input variables affecting FC removal from domestic wastewater. The effluent quality of two different designs of the MSL system was evaluated and compared for several parameters for potential reuse in agriculture. The first system consisted of a single‐stage MSL (MSL‐SS), and the second system consisted of a two‐stage MSL (MSL‐TS). The concentration of FC in the effluent of the MSL‐TS system was estimated by three machine learning algorithms: artificial neural network (ANN), Cubist, and multiple linear regression (MLR). The accuracy of the models was measured by comparing the real and predicted values. Significant (p < .001) improvements were noted for the removal of pollutants by the MSL‐TS system compared with the MSL‐SS system. Overall, the water quality parameters investigated complied with FAO irrigation standards. The predictive performance of the models has been compared and evaluated using several metrics. The results revealed that the ANN model yielded a superior predictive performance (R² = .953), followed by the Cubist model (R² = .946) and the MLR technique (R² = .481). Based on the accurate model (ANN), the degree of influence of each predictor was investigated, and the results show that total suspended solids and pH have proved to be more useful for predicting FC concentrations.
    Keywords fecal bacteria ; irrigation ; municipal wastewater ; neural networks ; pH ; prediction ; regression analysis ; water quality
    Language English
    Dates of publication 2021-01
    Size p. 144-157.
    Publishing place John Wiley & Sons, Ltd
    Document type Article
    Note JOURNAL ARTICLE
    ZDB-ID 120525-0
    ISSN 1537-2537 ; 0047-2425
    ISSN (online) 1537-2537
    ISSN 0047-2425
    DOI 10.1002/jeq2.20176
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  6. Article ; Online: A Comprehensive Review of Polysaccharide-Based Hydrogels as Promising Biomaterials.

    Berradi, Achraf / Aziz, Faissal / Achaby, Mounir El / Ouazzani, Naaila / Mandi, Laila

    Polymers

    2023  Volume 15, Issue 13

    Abstract: Polysaccharides have emerged as a promising material for hydrogel preparation due to their biocompatibility, biodegradability, and low cost. This review focuses on polysaccharide-based hydrogels' synthesis, characterization, and applications. The various ...

    Abstract Polysaccharides have emerged as a promising material for hydrogel preparation due to their biocompatibility, biodegradability, and low cost. This review focuses on polysaccharide-based hydrogels' synthesis, characterization, and applications. The various synthetic methods used to prepare polysaccharide-based hydrogels are discussed. The characterization techniques are also highlighted to evaluate the physical and chemical properties of polysaccharide-based hydrogels. Finally, the applications of SAPs in various fields are discussed, along with their potential benefits and limitations. Due to environmental concerns, this review shows a growing interest in developing bio-sourced hydrogels made from natural materials such as polysaccharides. SAPs have many beneficial properties, including good mechanical and morphological properties, thermal stability, biocompatibility, biodegradability, non-toxicity, abundance, economic viability, and good swelling ability. However, some challenges remain to be overcome, such as limiting the formulation complexity of some SAPs and establishing a general protocol for calculating their water absorption and retention capacity. Furthermore, the development of SAPs requires a multidisciplinary approach and research should focus on improving their synthesis, modification, and characterization as well as exploring their potential applications. Biocompatibility, biodegradation, and the regulatory approval pathway of SAPs should be carefully evaluated to ensure their safety and efficacy.
    Language English
    Publishing date 2023-06-30
    Publishing country Switzerland
    Document type Journal Article ; Review
    ZDB-ID 2527146-5
    ISSN 2073-4360 ; 2073-4360
    ISSN (online) 2073-4360
    ISSN 2073-4360
    DOI 10.3390/polym15132908
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  7. Article ; Online: Phenolic compounds removal in table olive processing wastewater by column adsorption: conditions' optimization.

    Aziz, Khalid / Haydari, Imane / Kaya, Savaş / Mandi, Laila / Ouazzani, Naaila / Aziz, Faissal

    Environmental science and pollution research international

    2023  

    Abstract: The annual production of wastewater from the olive table industry poses a serious problem owing to its high organic matter load, which is highly concentrated in phenolic compounds (PCs) and inorganic materials. This research used adsorption to recover ... ...

    Abstract The annual production of wastewater from the olive table industry poses a serious problem owing to its high organic matter load, which is highly concentrated in phenolic compounds (PCs) and inorganic materials. This research used adsorption to recover PCs from table olive wastewater (TOWW). Activated carbon was employed as a novel adsorbent. The activated carbon was obtained from olive pomace (OP) and activated using a chemical agent (ZnCl
    Language English
    Publishing date 2023-03-07
    Publishing country Germany
    Document type Journal Article
    ZDB-ID 1178791-0
    ISSN 1614-7499 ; 0944-1344
    ISSN (online) 1614-7499
    ISSN 0944-1344
    DOI 10.1007/s11356-023-26180-5
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  8. Article: A critical review on the electrosorption of organic compounds in aqueous effluent – Influencing factors and engineering considerations

    Lissaneddine, Amina / Pons, Marie-Noëlle / Aziz, Faissal / Ouazzani, Naaila / Mandi, Laila / Mousset, Emmanuel

    Environmental research. 2022 Mar., v. 204

    2022  

    Abstract: Despite being an old process from the end of the 19ᵗʰ century, electrosorption has attracted renewed attention in recent years because of its unique properties and advantages compared to other separation technologies and due to the concomitant ... ...

    Abstract Despite being an old process from the end of the 19ᵗʰ century, electrosorption has attracted renewed attention in recent years because of its unique properties and advantages compared to other separation technologies and due to the concomitant development of new porous electrode materials. Electrosorption offer the advantage to separate the pollutants from wastewater with the possibility of selectively adsorbing and desorbing the targeted compounds. A comprehensive review of electrosorption is provided with particular attention given to the electrosorption of organic compounds, unlike existing capacitive deionization review papers that only focus on inorganic salts. The background and principle of electrosorption are first presented, while the influence of the main parameters (e.g., electrode materials, electrode potential, physico-chemistry of the electrolyte solutions, type of compounds, co-sorption effect, reactor design, etc.) is then detailed and the modeling and engineering aspects are discussed. Finally, the main output and future prospects about recovery studies and combination between electro-sorption/desorption and degradation processes are given.This review particularly highlights that carbon-based materials have been mostly employed (85% of studies) as porous electrode in organics electrosorption, while existing studies lack of electrode stability and durability tests in real conditions. These electrodes have been implemented in a fixed-bed reactor design most of the time (43% of studies) due to enhanced mass transport. Moreover, the electrode potential is a major criterion: it should be applied in the non-faradaic domain otherwise unwanted reactions can easily occur, especially the corrosion of carbon from 0.21 V/standard hydrogen electrode or the water oxidation/reduction. Furthermore, there is lack of studies performed with actual effluents and without addition of supporting electrolyte, which is crucial for testing the real efficiency of the process. The associated predictive model will be required by considering the matrix effect along with transport phenomena and physico-chemical characteristics of targeted organic compounds.
    Keywords carbon ; corrosion ; deionization ; durability ; electrodes ; electrolytes ; hydrogen ; mass transfer ; models ; oxidation ; research ; wastewater
    Language English
    Dates of publication 2022-03
    Publishing place Elsevier Inc.
    Document type Article
    ZDB-ID 205699-9
    ISSN 1096-0953 ; 0013-9351
    ISSN (online) 1096-0953
    ISSN 0013-9351
    DOI 10.1016/j.envres.2021.112128
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  9. Article ; Online: Removal of bacterial indicators in on-site two-stage multi-soil-layering plant under arid climate (Morocco): prediction of total coliform content using K-nearest neighbor algorithm

    Zidan, Khadija / Sbahi, Sofyan / Hejjaj, Abdessamed / Ouazzani, Naaila / Assabbane, Ali / Mandi, Laila

    Environ Sci Pollut Res. 2022 Oct., v. 29, no. 50 p.75716-75729

    2022  

    Abstract: This study aims to evaluate and monitor the efficacy of a full-scale two-stage multi-soil-layering (TS-MSL) plant in removing fecal contamination from domestic wastewater. The TS-MSL plant under investigation consisted of two units in series, one with a ... ...

    Abstract This study aims to evaluate and monitor the efficacy of a full-scale two-stage multi-soil-layering (TS-MSL) plant in removing fecal contamination from domestic wastewater. The TS-MSL plant under investigation consisted of two units in series, one with a vertical flow regime (VF-MSL) and the other with a horizontal flow regime (HF-MSL). Furthermore, this study attempts to see whether linear model (LM) and K-nearest neighbor (KNN) model can be used to predict total coliform (TC) removal in the TS-MSL system. For 24 months, the TS-MSL system was monitored, with bimonthly measurements recorded at the inlet and outlet of each compartment. Obtained results show removal of 85% of COD, 67% of TP, 27% of TN, and 3 log units of coliforms with good system stability. Thus, the effluent meets the Moroccan water quality code for reuse in the irrigation of green spaces. In addition, as compared to LM, the KNN model (R² = 0.988) may be considered as an effective method for predicting TC removal in the TS-MSL system. Finally, sensitivity analysis has shown that TC and dissolved oxygen level in the influent were the most influential parameters for predicting TC removal in the TS-MSL system.
    Keywords algorithms ; arid zones ; coliform bacteria ; dissolved oxygen ; irrigation ; linear models ; municipal wastewater ; prediction ; water quality ; Morocco
    Language English
    Dates of publication 2022-10
    Size p. 75716-75729.
    Publishing place Springer Berlin Heidelberg
    Document type Article ; Online
    ZDB-ID 1178791-0
    ISSN 1614-7499 ; 0944-1344
    ISSN (online) 1614-7499
    ISSN 0944-1344
    DOI 10.1007/s11356-022-21194-x
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  10. Article: Study of the energetic, exergetic, and thermal balances of a solar distillation unit in comparison with a conventional system during the distillation of rosemary leaves

    Ezzarrouqy, Kamal / Hejjaj, Abdessamed / Idlimam, Ali / Nouh, Fatima Ait / Mandi, Laila

    Environmental science and pollution research. 2022 Apr., v. 29, no. 17

    2022  

    Abstract: The solar energy produced by Scheffler parabola (10 m²) is not fully exploited by the solar distillation system of aromatic and medicinal plants. In this work, the optical losses in the primary and secondary reflectors, and the thermal losses at each ... ...

    Abstract The solar energy produced by Scheffler parabola (10 m²) is not fully exploited by the solar distillation system of aromatic and medicinal plants. In this work, the optical losses in the primary and secondary reflectors, and the thermal losses at each part of this system (solar still, steam line, condenser) were determined. A thermal energetic and exergetic analysis were also performed for a solar distillation system of rosemary leaves. For average intensity radiation of 849.1W/m² and 6 Kg of rosemary leaves during 4 h of distillation, exergy and optical efficiencies of the system achieved up to 26.62% and 50.97%, respectively. The thermal efficiency of the solar still, steam line, and condenser is about 94.80%, 94.30%, and 87.76%, respectively. The essential oil yield per unit of consumed energy and the total efficiency of the solar distillation system, taking into account the heat losses in the solar still, steam line, and condenser, as well as the optical losses in the two reflectors, is 6.18 mL/ kWh and 40.00%, respectively. The efficiency can be as high as 42.42 % if the steam line is insulated. Moreover, the comparison between the solar steam distillation and conventional steam distillation shows that solar distillation is much more efficient since it gives better results and especially it avoids the emission of 12.10 kg of CO₂ during extraction.
    Keywords carbon dioxide ; essential oils ; exergy ; heat ; pollution ; research ; rosemary ; solar energy ; solar still ; steam ; steam distillation
    Language English
    Dates of publication 2022-04
    Size p. 25709-25722.
    Publishing place Springer Berlin Heidelberg
    Document type Article
    ZDB-ID 1178791-0
    ISSN 1614-7499 ; 0944-1344
    ISSN (online) 1614-7499
    ISSN 0944-1344
    DOI 10.1007/s11356-021-17612-1
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