Removal of heavy metals from stormwater runoff using granulated drinking water treatment residuals

نویسندگان

چکیده

Stormwater runoff is a significant source of heavy metals, including cadmium (Cd), chromium (Cr), and nickel (Ni), which pose ecological human health problems. Various filter media have been evaluated for metal removal from stormwater via adsorption, most involving chemical- or energy-intensive processes. Aluminum-based drinking water treatment residuals (WTR), non-hazardous byproduct treatment, are an inexpensive sorbent metals. However, the low permeability WTR problem requires mixing with sand carbon materials to improve flow; but such amendments also reduce its sorption capacity. To overcome this problem, granulated was generated using green technique organic low-energy process. Batch studies showed that granules remove Cd, Cr, Ni simultaneously. Metal adequately described by pseudo-second-order kinetic models Langmuir Freundlich isotherm models. The overall performance Cr > Cd Ni. presence divalent cations in solution negatively affected removal; anions had strong effect on removal. A triple-layer surface complexation model Results demonstrated potential emerge as metals runoff. • sustainable sorbents can simultaneously were made waste material energy. environmental parameters Surface could describe

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ژورنال

عنوان ژورنال: Environmental Technology and Innovation

سال: 2022

ISSN: ['2352-1864']

DOI: https://doi.org/10.1016/j.eti.2022.102636