Containment of phenol-impacted groundwater by vertical cutoff wall with backfill consisting of sand and bentonite modified with hydrophobic and hydrophilic polymers

Ni, Hao; Fan, Ri-Dong; Reddy, Krishna R.; Du, Yan-Jun

doi:10.1016/j.jhazmat.2023.132627

Cited by 10 publications

(1 citation statement)

References 66 publications

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“…Proper suspension retention is by no means a simple task: too little retention may cause failure in achieving plume break, while too high retention may cause clogging issues that results groundwater bypass [15]. Thus, besides activated carbons (ACs), a wide variety of sorbents have been used for groundwater remediation purposes, such as zeolites [17,18], organoclays [19,20], organohydrotalcites [21], and graphene oxides [22]. As a cheap and eco-friendly material, biochar (BC) is one of the most interesting alternatives to conventional absorbers.…”

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confidence: 99%

Biochar/Biopolymer Composites for In-Situ Groundwater Remediation

Petrangeli Papini,

Cerra,

Feriaud

et al. 2024

Preprint

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(max 200 words): The contamination of groundwater is a serious concern for ecosystems and human health. In this regard, biochar represents a promising low-cost and sustainable material for in-situ groundwater remediation. Herein, biochar waste of biomass energy production process derived from pine wood gasification at 950°C was used as active carbonaceous material in combination with different biopolymers: chitosan (CS), alginate (ALG), potato starch (PST), and carboxymethylcellulose (CMC) to produce BC@biopolymer composite materials. Different concentrations of biochar (0.3–1.0 g·L-1) and biopolymers (0.2–20.0 g·L-1) were tested and blending mode was used as simple and straightforward strategy to obtain BC composites. Scanning electron microscopy (FE-SEM), UV-Visible, infrared (FT-IR) spectroscopy, specific surface area (BET method), pore volume, and pore size distribution (textural parameters), dynamic light scattering (DLS), and ζ-potential were used to investigate the composite chemical structure, stability, and to assess the interaction among counterparts. On optimized formulations, breakthrough tests and batch adsorption isotherms on trichloroethylene (TCE) as a model contaminant were performed to evaluate the capability of composites to be delivered through a porous medium determining the transport properties, (hydrodynamic dispersion retention percentage, and adsorption capacity). This biopolymer-modified biochar holds significant promise as a sustainable and effective solution to address various groundwater pollution challenges.

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