Desain Reaktor Pengolahan Limbah Cair Laboratorium

Pabbenteng, Pabbenteng; Alwina, Elisabeth

doi:10.35970/jppl.v2i1.142

Cited by 1 publication

(1 citation statement)

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“…It is important to highlight that Peru is one of the largest cocoa producers in the world, with a production of 218 KTn year −1 that generates approximately 153 KTn year -1 of waste. Thus, cocoa residues could be a sustainable resource for the production of heavy metal biosorbents [17][18][19][20] with potential applications at an industrial level, within a circular economy that uses eco-friendly materials with a low environmental impact. In this context, one of our objectives is the search for biomass, capable of efficiently removing heavy metals at a low economic cost and with the guarantee of a sustained supply.…”

Section: Introductionmentioning

confidence: 99%

Effective Removal of Cd(II) from Aqueous Solutions Using Theobroma cacao Agro-Industrial Waste

Lavado-Meza,

De la Cruz-Cerrón,

Lavado-Puente

et al. 2023

Molecules

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Theobroma cacao agro-industrial waste (WTC) has been characterized and tested as an effective biosorbent to remove Cd(II) from aqueous media. At the optimum pH of 5.0, a maximum adsorption capacity of qe,max = 58.5 mg g−1 was determined. The structural and morphological characterization have been conducted by FTIR, SEM/EDX, and TGA measurements. The SEM/EDX results confirmed that the metals are adsorbed on the surface. C-O-C, OH, CH, NH, and C=O functional groups were identified by FTIR. TGA results were consistent with the presence of hemicellulose. Biosorption kinetics were rapid during the first 30 min and then reached equilibrium. The corresponding experimental data were well fitted to pseudo-first and -second order models, the latter being the best. The biosorption isotherm data were also well fitted to Temkin, Langmuir, and Freundlich models, showing that several sorption mechanisms may be involved in the Cd(II) biosorption process, which was characterized as exothermic (ΔH0 < 0), feasible, and spontaneous (ΔG0 < 0). In binary (Cd–Pb and Cd–Cu) and ternary (Cd–Pb–Cu) systems, Cu(II) and particularly Pb(II) co-cations exert strong antagonistic effects. Using HNO3, effective good regeneration of WTC was obtained to efficiently remove Cd(II) up to three times.

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Section: Introductionmentioning

confidence: 99%