Sludge-derived biochars: A review on the influence of synthesis conditions on pollutants removal efficiency from wastewaters

Jellali, Salah; Khiari, Besma; Usman, Muhammad; Hamdi, Hassan; Charabi, Yassine; Jeguirim, Mejdi

doi:10.1016/j.rser.2021.111068

Cited by 77 publications

(26 citation statements)

References 126 publications

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“…The presence of these ions, even at low concentrations, leads to more alkaline biochar surface. It is important to underline that the type of the functional groups (acidic or basic) significantly impacts the effectiveness of solid materials in removing both organic and mineral pollutants from aqueous solutions [18].…”

Section: Surface Chemical Propertiesmentioning

confidence: 99%

“…Among the diverse valorization techniques of these agricultural wastes, the slow pyrolysis and hydrothermal carbonization received great attention for the synthesis of value-added and carbon rich materials, named biochars and hydrochars, respectively. These generated byproducts have interesting characteristics that allow them to be valorized in numerous application fields [17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

“…Along with the solid biochar, these feedstocks transformation at inert atmosphere produced two other carbonization by-products, i.e., syngas and bio-oil, that are known for their interesting energetic properties [22]. A significant attention is attributed to the biochar upgrading into more interesting carbon material with very specific characteristics through targeted physical, chemical and/or thermal activation depending on the final desired application [18,23]. Few drawbacks were noted when opting for this technique concerning mainly: (i) the relatively high energy consumption related to the high pyrolysis temperatures (350 • C-750 • C), (ii) the pre-drying step for feedstocks containing high moisture percentage and (iii) the relatively low final solid yield at high temperatures [24].…”

Section: Introductionmentioning

confidence: 99%

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Olive Mill by-Products Thermochemical Conversion via Hydrothermal Carbonization and Slow Pyrolysis: Detailed Comparison between the Generated Hydrochars and Biochars Characteristics

et al. 2022

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In this research work, an ecofriendly approach was adopted for the treatment of two abundant liquid and solid agricultural wastes generated by olive mill industry: olive mill wastewater (OMWW) and raw olive pomace (ROP). It consists, firstly of the impregnation of ROP by OMWW and the conversion of the resulting impregnated sample (IROP) into hydrochars and biochars through hydrothermal carbonization (HTC) and slow pyrolysis methods, respectively. The impact of the treatment temperature on the physico-chemical properties of the derived chars was assessed by various analytical techniques. The hydrochars production yields were found to be higher than the biochars ones and associated to the lower temperature used. However, the generated biochars possess higher carbon percentage and lower volatile matter contents. In addition, the increase of the hydrothermal and pyrolysis carbonization temperatures shows an increase of macro-elements contents and a significant decrease of the O/C ratios which led to an enhancement of the high heating value for both hydrochars and biochars. The FTIR and Boehm titration analysis highlighted a significant alteration of the biochars surface chemistry compared to hydrochars evidenced by the lower amount of functional groups. The collected data emphasize on the efficient potential application of hydrochars and biochars for agricultural and environmental applications, respectively. Furthermore, it was noted that both chars have high energetic potentials and could be used for co-firing with coal in industrial boilers.

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Section: Surface Chemical Propertiesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Olive Mill by-Products Thermochemical Conversion via Hydrothermal Carbonization and Slow Pyrolysis: Detailed Comparison between the Generated Hydrochars and Biochars Characteristics

et al. 2022

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“…According to several researchers the concept of "circular economy" was proposed to be an idea of reducing environmental impact caused by discharged waste products and to increase the effective recycling system in order to minimize the wasted resources. Therefore, the use of industrial waste as alternative adsorbents has been considered, and solid waste generated in the leather processing operation has been used as alternative adsorbents for the removal of dyes, metals, oils, and surfactants [9][10][11]. Adsorbents are generally the key points of the adsorption method, which directly affect the adsorption capacity of pollutants and cost.…”

Section: Introductionmentioning

confidence: 99%

Industrial dye removal from tannery wastewater by using biochar produced from tannery fleshing waste: a road to circular economy

Haddad¹,

Hantous²,

Chagtmi³

et al. 2022

Comptes Rendus. Chimie

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In this study, the capacity of biochars, derived from the pyrolysis of tannery fleshing waste (TFW) at 400 °C; 500 °C and 600 °C, in removal of red dye Sella Fast Red (SFR) from aqueous solutions and tannery wastewater was investigated under various experimental conditions in batch mode. Results show that for all applied biochars, the removed kinetics data were well fitted by the pseudo-second-order model, and the equilibrium state was obtained after 240 min of contact time. For an aqueous pH of 6 and a red dye concentration of 75 mg•L −1 , the removed amounts increased from 26 mg•g −1 to 39.86 mg•g −1 when the used pyrolysis temperature was increased from 400 °C to 600 °C. Moreover, SFR adsorption data at equilibrium were well fitted by Langmuir model suggesting a probable monolayer adsorption process with a maximal removal capacity of 62.7 mg•g −1 for BTFW-600 °C. The thermodynamic study demonstrated that SFR adsorption was endothermic for the three tested biochars. Desorption experiments with distilled water proved that SFR was significantly desorbed from the tested biochars, which offers possible reusability. On the other hand, BTFW-600 °C has demonstrated an important ability in removing SFR from real wastewater since only one dosage of 15 g•L −1 was enough to ensure more than 97% of dye removal. According to pH ZC and FTIR analysis, the possible mechanism toward SFR dye removal was attributed to electrostatic interactions that occurred between biochar and functional groups of SFR. This work could provide guidance for the value-added utilization of tannery solid waste and a practical way to remove dyes from tannery wastewater.

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“…Adsorption [17,18] has been identified, these last decades, as an attractive method, liable to be used separately or in combination with other technologies for efficient dyes removal from aqueous solutions [19]. The main advantages of adsorption compared to other technologies are simplicity, low cost, and efficiency [20].…”

Section: Introductionmentioning

confidence: 99%

Competitive bio-sorption of basic dyes onto petiole palm tree wastes in single and binary systems

Sana¹,

Guiza²,

Jellali³

et al. 2022

Comptes Rendus. Chimie

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Sustainable Biomass Resources for Environmental, Agronomic, Biomaterials and Energy Applications 3 / Ressources de biomasse durables pour des applications environnementales, agronomiques, de biomatériaux et énergétiques 3Competitive bio-sorption of basic dyes onto petiole palm tree wastes in single and binary systems Biosorption compétitive des colorants basiques sur des déchets de pétiole de palmier dans les systèmes simples et binaires

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Sludge-derived biochars: A review on the influence of synthesis conditions on pollutants removal efficiency from wastewaters

Cited by 77 publications

References 126 publications

Olive Mill by-Products Thermochemical Conversion via Hydrothermal Carbonization and Slow Pyrolysis: Detailed Comparison between the Generated Hydrochars and Biochars Characteristics

Olive Mill by-Products Thermochemical Conversion via Hydrothermal Carbonization and Slow Pyrolysis: Detailed Comparison between the Generated Hydrochars and Biochars Characteristics

Industrial dye removal from tannery wastewater by using biochar produced from tannery fleshing waste: a road to circular economy

Competitive bio-sorption of basic dyes onto petiole palm tree wastes in single and binary systems

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