Amino Acid Modified Bentonite Clay as an Eco-Friendly Adsorbent for Landfill Leachate Treatment

Abstract

Historically, landfilling has been the oldest form of solid waste management around the world [1] and in many regions due to the simplicity of design and the low cost of operations, It is still the most common and popular solid waste management strategy [2]. Although this strategy of solid waste management has some advantages, it leads to the production of leachate [3] so that the production of highly contaminated leachate is known as one of the main weaknesses of this type of waste management [4]. Leachate is a liquid that is generated through the percolation of water across the waste layers. This liquid absorbs nutrients and

Fixed-bed column study for the remediation of the bauxite-liquid residue using acid-activated clays and natural clays

“…Sulfuric acid, which has a higher number of protons than the HCl used in this study and thus increases the clay's surface acidity, is the likely cause of the difference. Another study found a 92.1% reduction in the amount of turbidity when an amino acid-modified bentonite clay was used [ 42 ]. That being said, future research may find that sulfuric acid is an effective tool for achieving the recommended turbidity discharge limit.…”

Leachate treatment potential of nanomaterial based assemblies: a systematic review on recent development

“…Under optimal conditions, the maximum COD and turbidity removal for amino acid modified clay was 65.7% and 92.1%, respectively, under pH adjustment setups. Furthermore, the analysis showed that the adsorbent created under pH adjustment settings had a greater leachate treatment efficiency than the adsorbent synthesized under non-pH adjustment conditions (Hajjizadeh et al 2020).…”

“…Apart from carbon nanotubes, several other nano adsorbents were also reported for the treatment of leachates: nano-ionic copper doped oil palm frond activated carbon (n-OPFAC) (Adam et al 2019), Saccharum officinarum leaves (SL) assisted nano-silica (NS) (Kaliannan et al 2019), and others. Bentonite clay was modified with amino acids as an eco-friendly adsorbent (Hajjizadeh et al 2020). Adam et al prepared n-OPFAC.…”

kaolin for management of organic and inorganic pollutants, as well as pathogenic microorganisms in municipal wastewater

“…It also affects the charges of the adsorbate and adsorbent in solution and the manner in which they interact with each other [19]. The pH of an aqueous solution has a significant impact on the degree of ionization and the behavior of several contaminants, which in turn affects the reaction kinetics and equilibrium of the adsorption process [20] .…”