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Landfill leachate contains heavy organic pollutants, which pollute ground and surface waters. This dataset applied a newly-introduced catalyst, Cu/Mg/Al-chitosan, for a landfill leachate treatment during a catalytic oxidation. The data of chemical oxygen demand (COD) and colour removal from the leachate was reported as a function of reaction time (20–460 min). Economic evaluation data of the Cu/Mg/Al-chitosan-O3 system showed that the current cost of the system for treating each m3 leachate is US$ 18 and for catalyst synthesis is US$ 54.5. Data could be useful from environmental and economic perspectives to those concerned about landfill leachate threats.
Table 1 shows the characteristics of the raw leachates. Fig. 1, Fig. 2 depict the COD and colour removal at different leachate pHs respectively as a function of time. Fig. 3 shows the pseudo first-order kinetic plot for the leachate COD removal by the Cu/Mg/Al-chitosan-O3 system. Results for the economic evaluation of leachate treatment by Cu/Mg/Al-chitosan-O3 system are presented in Table 2.
Leachate samples of a municipal solid waste landfill were collected with 5 l-polyethylene bottles from Kahrizak, Tehran, Iran during the summer of 2015 and transferred in cooler boxes at a temperature below 5 °C to the laboratory within 2 h. The landfill leachates were sampled from different leachate ponds with different pHs (9.5, 7, and 5.5). All samples were taken from the surface of leachates. Leachate samples were stored in a refrigerator at 4 °C before tests. The physicochemical characteristics of the raw leachates are listed in Table 1.
A reactor with working volume of 300 mL, equipped with an ozone generator (Model 3S-A3, Tonglin Technology, Beijing), a sintered diffuser to evenly distribute the ozone stream to the landfill leachate, an air pump, KI solution as ozone off-gas destructor, valves, and tubing. The O3-generator capacity was 5 g/h. The O3 flow rate was set to 3.5 mg/min throughout the experiments. About 200 mL of landfill leachate with original COD and pH value (see Fig. 1, Fig. 2) was poured in the reactor and the final COD was analysed at reaction time of 20–460 min. All tests were done with three repetitions under room temperature (24±1 °C) and atmospheric condition and average values beside standard deviation (SD) were reported herein.
The landfill leachate pH was determined on site at the time of sampling, using a digital pH meter. The COD measurements were done using the potassium dichromate oxidation method . Leachates BOD5 was determined in accordance with the 5210-D test using manometric respirometry (OxiTop) . A total organic carbon (TOC) analyser (Shimadzu Co.) was applied to determine TOC content of leachates. Other characteristics of the leachates were recorded in accordance with the standard methods for the examination of water and wastewater .
This dataset was technically assisted by the Bushehr University of Medical Sciences, Bushehr, Iran. Tehran Wastes Management Organization, Iran is also gratefully acknowledged for their collaborations during leachate sampling.
Transparency documentTransparency document data associated with this article can be found in the online version at 10.1016/j.dib.2017.07.063.