Abdelmalek Chergui's research while affiliated with University M'Hamed Bougara of Boumerdes and other places

... The absorbance of unadsorbed Azorubine E122 was measured at λ max = 516 nm. [37] 2.6.2 | Effect of nanocomposite dosage on the removal of Azorubine E122 ...

... The contact time was kept between 10 to 30 minutes. The quick uptake of the dye in first 10 minutes by all the three mycomass recorded might be due to high availability of adsorption sites on the myco-biosorbent surface (Bouras et al., 2021). After that, a decline in adsorption percentage was also occurred at 20 minutes which might be caused by the reduction in the available adsorption sites in addition to the repulsive forces between the dyes molecules on the biomass and the bulk phase (Bouras et al., 2017;Ghariani et al., 2019). ...

... Thus, dyes represent a threat to the environment and the health of the entire population [2]. Globally, approximately 7 x 108-1 x 109 kg/year of dyes are produced [7] and among these industries, the largest quantities of dyes are used in the textile industry [8]. ...

... Además, el tratamiento de los efluentes cianurados con peróxido de hidrogeno demuestran un tiempo de reacción y residencia total a 141,31 min. (2 horas y 20 min), cual es ventajoso para el tratamiento de grandes flujos másicos de efluente (Amaouche et al., 2019). Asimismo, se observa en las tablas 1 y 2, que los tanques de residencia (TK-3, TK-4 y TK-5) son los eliminan mayor cantidad de cianuro, mientras que los tanques de reacción (TK-1 y TK-2) permiten la mezcla e interacción entre el solvente y soluto. ...

... One of the most vital examples of this kind is the contamination of water bodies due to effluents from the textile industry [1]. These effluents contain various recalcitrant compounds, toxic chemicals, and organic dyes that compromise aquatic life due to their toxic and carcinogenic nature [2][3][4][5]. Methylene Blue (MB) is a well-known synthetic thiazine cationic dye, heavily used in the textile industry to dye fabrics. Moreover, it is also being used in the paper and cosmetics industries for dyeing purposes. ...

... The impacts of pH on the biosorption of Congo red by de-oiled biomass showed that the Congo red decolorization percent was enhanced by increasing the pH value of the solution until pH value was 6.0, at which point the decolorization efficiency decreased. In acidic solutions, hydrogen proton (H + ) is easily joined with SO 3 − groups in Congo red, so the decolorization percent increased through the electrostatic attraction force between molecules [84], whereas in the alkaline solution (pH > 7), OH − groups increased in the solution, and at the same time the yeast cell walls contained many negative charges; consequently, there was an electrostatic repulsion force between de-oiled yeast biomasses and Congo red dye [85], resulting in a decrease in the Congo red decolorization rate. ...

... It is important to mention that some of the biocatalysts prepared in this research still performed better than those reported by Hachi et al. [69], who obtained a maximum removal of 25% of acetaminophen at pH 7.0 after 24 h of reaction. Also, laccase is reported to transform acetaminophen, delivering 94% of maximum removal after 4 h at pH 7.0 [70], and 90% after 2 h of treatment at pH 4.0 [71]. ...

... The biosorption capacity of the fungal biomass of Pleurotus mutilus for biosorption of Fe +3 and Mn +2 was evaluated in Table 17.2. Different functional groups, alcohol, hydroxyl, amino, and carboxyl on biosorbent which are responsible for biosorption of positively charged metal ion (Fe +3 and Mn +2 ) with negatively charged functional groups, were reported by Madani et al. (2015). Functional groups on the biomass surfaces can be modified by various pretreatment methods such as acid, base, and thermal treatment (Fig. 17.3) for the effective adsorption of heavy metals. ...

... Many approaches are proposed for the removal of methylene blue dye (MB dye) (El Nemr et al. 2021) (Hachi et al. 2016) (Alkizwini 2021) (Singh et al. 2017), for instance, photocatalysis and adsorption. The second approach was usually achieved using a variety of adsorbents, like layered-double-hydroxides, polyaniline/polypyrrole modified adsorbents (Sillanpää et al. 2021), carbon/graphene-based adsorbents, chitosan/clay-based adsorbents, etc. ...

... The modification with acid inserted the material capacity roughly by 30% while alkaline treatment reduced it 30% relating to the untreated stones [227]. Date stones were also used for removal of phenol and p-nitro phenol [228], Sour cherry stones Cr 6+ 0.53 [240] F I N A L Low-Cost Alternative Adsorbents 81 bromide ions with efficiency 20% greater than on activated carbon [229], Pb 2+ and Cd 2+ on raw and stones modified with diethylenetriaminepentaacetic dianhydride [230], Congo Red (regeneration with acetone, significant decrease in the maximum adsorption capacity in subsequent cycles) [231], Pb 2+ on raw and NaOH treated seeds [232], or Hg 2+ and Zn 2+ [233]. ...