Selective removal of heavy metals from landfill leachate by reactive granular filters. 2018

Stefania Bilardi, and Paolo S Calabrò, and Rosa Greco, and Nicola Moraci
Department of Civil, Energy, Environment and Materials Engineering (DICEAM), Mediterranea University of Reggio Calabria, Reggio Calabria, Italy. Electronic address: stefania.bilardi@unirc.it.

The pre-treatment of landfill leachate prior to its co-treatment in the municipal plants of waste water processing could represent an appropriate and cost-effective solution for its management. Pre-treatment is necessary especially to remove heavy metals, which may be transferred to the excess sludge preventing its valorisation. In the present paper, we propose a chemical-physical pre-treatment of leachate using four different granular reactive media able to selectively remove the contaminants present in the leachate. The efficiency of these materials was investigated using synthetic leachate through batch tests and a column test. In the latter case the four materials were placed in two columns connected in series and fed an under constant upward flow (0.5 mL/min). The first column was filled half (50 cm) with a granular mixture of zero valent iron (ZVI) and pumice and half (50 cm) with a granular mixture of ZVI and granular activated carbon (GAC). The second column, which was fed with the effluent of the first column, was filled half with zeolite (chabazite) and half with GAC. Heavy metals were mainly removed by the ZVI/pumice and ZVI/GAC steps with a removal efficiency that was higher than 98, 94 and 90% for copper, nickel and zinc, respectively, after 70 days of operation. Ammonium was removed by zeolite with a removal efficiency of 99% up to 23 days. The average reduction of the chemical oxygen demand (COD) was of 40% for 85 days, whereas chloride and sulphate removal was negligible.

UI MeSH Term Description Entries

Related Publications

Stefania Bilardi, and Paolo S Calabrò, and Rosa Greco, and Nicola Moraci
June 2019, Environmental science and pollution research international,
Stefania Bilardi, and Paolo S Calabrò, and Rosa Greco, and Nicola Moraci
December 2018, Journal of environmental management,
Stefania Bilardi, and Paolo S Calabrò, and Rosa Greco, and Nicola Moraci
January 2008, International journal of phytoremediation,
Stefania Bilardi, and Paolo S Calabrò, and Rosa Greco, and Nicola Moraci
January 2001, Journal of environmental science and health. Part A, Toxic/hazardous substances & environmental engineering,
Stefania Bilardi, and Paolo S Calabrò, and Rosa Greco, and Nicola Moraci
April 2017, The Science of the total environment,
Stefania Bilardi, and Paolo S Calabrò, and Rosa Greco, and Nicola Moraci
June 2022, Journal of environmental sciences (China),
Stefania Bilardi, and Paolo S Calabrò, and Rosa Greco, and Nicola Moraci
August 2007, Journal of hazardous materials,
Stefania Bilardi, and Paolo S Calabrò, and Rosa Greco, and Nicola Moraci
December 2021, Water science and technology : a journal of the International Association on Water Pollution Research,
Stefania Bilardi, and Paolo S Calabrò, and Rosa Greco, and Nicola Moraci
January 2011, Water science and technology : a journal of the International Association on Water Pollution Research,
Stefania Bilardi, and Paolo S Calabrò, and Rosa Greco, and Nicola Moraci
February 2004, Waste management & research : the journal of the International Solid Wastes and Public Cleansing Association, ISWA,
Copied contents to your clipboard!