Effect of production temperature in biochar properties from bamboo culm and its influences on atrazine adsorption from aqueous systems

Sbizzaro, Mariana; Sampaio, Sílvio César; Reis, Ralpho Rinaldo dos; Beraldi, Francielle de Assis; Rosa, Danielle Medina; Maia, C. M. B. de F.; Cordovil, C.; Nascimento, Cleuciane Tillvitz do; Silva, Edson Antônio da; Borba, Carlos Eduardo

doi:10.1016/j.molliq.2021.117667

Cited by 49 publications

(12 citation statements)

References 79 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Furthermore, the capacity values of the model are in agreement with the experimental values, increasing with increasing temperature, reaching a maximum capacity of 7.68 mg g -1 at 328 K. It was also observed that the K L and q L parameters were directly proportional to temperature, indicating the adsorbate/adsorbent affinity and adsorption capacity were favored at 328 K [25]. In the literature, it is possible to observe several adsorbents that present better adjustment to the Langmuir isotherm in removing atrazine, indicating that herbicide molecules tend to adhere to the surface of the adsorbent through the formation of monolayers, related to homogeneous surfaces [23,33,[54][55][56][57][58][59][60].…”

Section: Adsorption Isotherm and Thermodynamicsmentioning

confidence: 97%

“…Therefore, the structure before and after pyrolysis is defined according to the organic matter present in the biochar [32]. Sbizzaro et al [33] found a similar behavior when preparing two biochars from bamboo. They observed that the increase in temperature from 350 • to 550 • C provided more cavities and irregularities on the material's surface, with greater porosity and, consequently, greater surface area.…”

Section: Cbs and Cbb Characteristicsmentioning

confidence: 99%

See 1 more Smart Citation

Investigation of biochar from Cedrella fissilis applied to the adsorption of atrazine herbicide from an aqueous medium

Hernandes

Franco

Georgin

et al. 2022

Journal of Environmental Chemical Engineering

View full text Add to dashboard Cite

Section: Adsorption Isotherm and Thermodynamicsmentioning

confidence: 97%

Section: Cbs and Cbb Characteristicsmentioning

confidence: 99%

Investigation of biochar from Cedrella fissilis applied to the adsorption of atrazine herbicide from an aqueous medium

Hernandes

Franco

Georgin

et al. 2022

Journal of Environmental Chemical Engineering

View full text Add to dashboard Cite

“…Among the applicable technologies, adsorption has a high potential for use due to its simple design and high efficiency, especially when aligned with porous and high surface area materials such as ACs [11]. In the context of herbicides, several materials have already been used successfully and with high adsorption capacities, such as AC produced from wheat husk to remove 2,4-D [12]; corn cob biochar in the removal of 2,4-D [1]; rice husk hydrochar in the removal of atrazine [13]; bamboo stem biochar in atrazine removal [14]; carbonization of araçá fruit peels to remove atrazine [15]; charcoal production from the bark of the cedar forest species to remove atrazine [16]; removal of diuron from charcoal produced from baobab seeds [17]; and finally, commercial AC was used to remove paraquat, diquat and difenzoquat from the water [18].…”

Section: Introductionmentioning

confidence: 99%

Transformation of Residual Açai Fruit (Euterpe oleracea) Seeds into Porous Adsorbent for Efficient Removal of 2,4-Dichlorophenoxyacetic Acid Herbicide from Waters

et al. 2022

View full text Add to dashboard Cite

Brazil’s production and consumption of açai pulp (Euterpe oleracea) occur on a large scale. Most of the fruit is formed by the pit, which generates countless tons of residual biomass. A new purpose for this biomass, making its consumption highly sustainable, was presented in this study, where activated carbon (AC) was produced with zinc chloride for later use as an adsorbent. AC carbon formed by carbon and with a yield of 28 % was satisfactorily used as an adsorbent in removing the herbicide 2,4-dichlorophenoxyacetic acid (2,4-D). Removal efficiency was due to the highly porous surface (Vp = 0.467 cm3 g−1; Dp = 1.126 nm) and good surface área (SBET = 920.56 m2 g−1). The equilibrium data fit the Sips heterogeneous and homogeneous surface model better. It was observed that the increase in temperature favored adsorption, reaching a maximum experimental capacity of 218 mg g−1 at 328 K. The thermodynamic behavior indicated a spontaneous, favorable, and endothermic behavior. The magnitude of the enthalpy of adsorption was in agreement with the physical adsorption. Regardless of the herbicide concentration, the adsorbent displayed fast kinetics, reaching equilibrium within 120 min. The linear driving force (LDF) model provided a strong statistical match to the kinetic curves. AC with zinc chloride (ZnCl2), created from leftover açai biomass, is a potential alternative as an adsorbent for treating effluents containing 2,4-D.

show abstract

“…Moreover, the form of aluminium is gradually transformed from a positive multinuclear complex to an amorphous aluminium hydroxide gel or an anion of tetrahydroxy aluminium. The direct adsorption capacity is also enhanced [39]. After the polyaluminium chloride is added to the water, the ion exchange, adsorption and sweeping of F − through the complexation of Al 3+ and F − , the intermediate product of hydrolysis, and the final generated amorphous A(OH) 3 (am) floc, the concentration of fluoride ions in the water gradually decreases [40,41].…”

Section: Influence and Optimisation Of Process Pretreatment On Defluo...mentioning

confidence: 99%

Exploration and Optimisation of High-Salt Wastewater Defluorination Process

Chen¹,

Zhao²,

Tao³

et al. 2022

Water

View full text Add to dashboard Cite

The typical lime precipitation method is used to treat high-concentration fluorine-containing wastewater. In this way, the fluorine in the wastewater can be removed in the form of CaF2. Thus, this method has a good fluoride removal effect. In this study, calcium hydroxide was used to adjust the pH and achieve a significant fluoride removal effect at the same time. The removal rate of fluoride ion decreases gradually with the increase in the concentration of sulphate in the raw water. When the synergistic defluorination cannot meet the requirements of water production, adding a step of aluminium salt flocculation and precipitation can further reduce the fluoride ion concentration. According to the feasibility of the actual project, this study improves the lime coagulation precipitation defluorination process on this basis, and the combined process is synchronised. In the process optimisation, barium chloride is added to remove the influence of sulphate radicals in the water, and then, the pH is adjusted to 5–6. The fluoride ion concentration in high-salt wastewater can be reduced from 446.6 mg/L to 35.4 mg/L by defluorination after pre-treatment whose removal rate was 92.1%. The combined process synchronously removes fluorine and purifies the water quality to a certain extent. Indicators such as COD, total phosphorus, ammonia nitrogen, and chloride ions in wastewater are reduced, and the removal rate is increased by 35.5% under the same conditions. This scheme improves the wastewater treatment effect without increasing the existing treatment equipment. Thus, it achieves a better defluorination effect and reduces the dosage of chemicals as much as possible, which is conducive to lowering the discharge of sludge after treatment.

show abstract

Effect of production temperature in biochar properties from bamboo culm and its influences on atrazine adsorption from aqueous systems

Cited by 49 publications

References 79 publications

Investigation of biochar from Cedrella fissilis applied to the adsorption of atrazine herbicide from an aqueous medium

Investigation of biochar from Cedrella fissilis applied to the adsorption of atrazine herbicide from an aqueous medium

Transformation of Residual Açai Fruit (Euterpe oleracea) Seeds into Porous Adsorbent for Efficient Removal of 2,4-Dichlorophenoxyacetic Acid Herbicide from Waters

Exploration and Optimisation of High-Salt Wastewater Defluorination Process

Contact Info

Product

Resources

About