Sustainable Chromium Recovery From Wastewater Using Mango and Jackfruit Seed Kernel Bio-Adsorbents

Abstract

Wastewater is a rich source of valuable chemicals of industrial importance. However, their economic recovery is crucial for sustainability. The objective of the present work is to recover hexavalent chromium (Cr VI) as a value-added transition metal from wastewater cost-effectively; the biosorbent derived from seed kernels of mango (M) and jackfruit (JF) were applied for removing the metal from simulated wastewater. The functional groups of the biomass were analysed with the help of Fourier transform infrared (FTIR) spectroscopy, micrographs were generated using a scanning electron microscope, and crystallinity was determined by an x-ray diffractometer (XRD). The concentration of Cr VI in wastewater was analysed by an inductively coupled plasma optical emission spectrometer (ICP-OES). Process parameters (pH, dose, contact time, temperature, and initial concentration) were optimized for efficient Cr VI adsorption using a response surface methodology-based Box–Behnken design (BBD) employing Design-software 6.0.8. The batch experiment at room temperature at pH 4.8 and Cr VI removal ∼94% (M) and ∼92% (JF) was achieved by using a 60-mg dose and an initial Cr (VI) concentration of 2 ppm in 120 min. The equilibrium Cr binding on the biosorbent was well explained using Freundlich isotherm (R2 = 0.97), which indicated the indirect interactions between Cr (VI) and the biosorbent. Biosorption of Cr (VI) followed the pseudo-order and intra-particle diffusion models. The maximum adsorption capacity of the M and JF bio-adsorbent is 517.24 and 207.6 g/mg, respectively. These efficient, cost-effective, and eco-friendly biosorbents could be potentially applied for removing toxic Cr (VI) from polluted water.

Finding out various potentials and possibilities of jackfruit seed and its usage in the industry: a review

“…), zinc(Zn 2+ ) and Nickel(Ni 2+ ) from aqueous environments.Also, dye from textile wastewater is removed by this process (Maity et al 2022), (Giri et al 2021), (Prasad et al 2020), (Choy et al 2017) (Sarifuddin et al 2018), (Jayakumar et al 2019), (Lothfy et al 2018), (Santana et al, 2018), (Lubis et al 2017), (Nguyen et al 2022), (Oupathumpanont et al 2016), (Maysarah, 2020), (Widhiantari & De Side 2021), (Mahardiani et al 2022), (Putri Putri R. D. A., &Fitrianto 2020), (S Castro et al 2023)…”

A Comparative Study of Cr(VI) Sorption by Aureobasidium pullulans AKW Biomass and Its Extracellular Melanin: Complementary Modeling with Equilibrium Isotherms, Kinetic Studies, and Decision Tree Modeling

“…Biomass-based sorbents are a sustainable and cost-effective way to remove Cr(VI) from water and wastewater [ 28 ]. These sorbents can be made from a variety of biomass materials, such as agricultural waste, wood waste, and food waste.…”

Enhanced adsorptive removal of rifampicin and tigecycline from single system using nano-ceria decorated biochar of mango seed kernel

“…Tons of mango stones are thrown annually and could represent a burden on the ecosystem if not recycled. The depollution efforts using MSK were mainly devoted for the heavy metals and dyes, with no single report for the deployment of MSK for the remediation of the pharmaceutical wastewater [ [39] , [40] , [41] , [42] , [43] ]. On the other hand, decoration of biochars with metal oxides renders them more efficient biosorbents for remediation of wastewater [ [44] , [45] , [46] ].…”