a b s t r a c tThe article describes the partial outputs of the research focusing on alternative procedures and agents for water treatment. In this case, the possibilities are shown of using water glass and nanoiron as agents for removing heavy metals and nutrients from the water. In particular, laboratory experiments are presented simulating the processes of removing chromium and phosphorus from water. The purpose of the experiments was to show the efficiency of mentioned alternative agents when removing the pollution mentioned. The laboratory experiment was conceived as a series of jar tests as standard procedure used in connection with the control and optimisation of the coagulation process. Laboratory processes were carried out with model water whose main component was raw water from a surface water source enriched with a previously given concentration of selected pollution -chromium and phosphorus. During the experiments, the dependence was determined of the removal of the given pollution on the dose of the agent and simultaneous search for the optimal dose while applying water glass and/or nanoiron as innovative agents.
Abstract. Lead is a highly toxic metal. Given that in the Czech Republic the limit of the concentration of lead in drinking water has recently been changed from 25 µg.l -1 to 10 µg.l -1 , the article deals with the removal of lead from water through three sorption materials (Bayoxide E33, GEH and CFH 0818). From the analysis, it is clear that all the sorption materials achieve excellent results in removing lead due to its concentration in the raw water. Overall, the best results in the removal of lead from water were achieved by the sorption material Bayoxide E33. At the same time, the efficiency of sorption materials on the removal of iron and manganese from the water was monitored.
The concept of reusing wastewater and rainwater in buildings has recently become more important. There are countries where the use of greywater in some buildings has already been made mandatory (e.g. in Japan for toilet flushing). Such measures are gradually being introduced in the EU, where water recycling projects exist for office buildings and hotels. The Czech Republic still lacks experience and a design background in this area. The article is based on TAČR project No. TA01020311, titled “The use of grey and rain water in buildings”, and summarizes basic information about the quality of greywater, and methods of treating it and recovering its heat.
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