Search results for "saostus"
showing 6 items of 16 documents
The use of industrial waste materials for the simultaneous removal of ammonium nitrogen and phosphate from the anaerobic digestion reject water
2020
The European Union’s circular economy strategy aims to increase the recycling and re-use of products and waste materials. According to the strategy, the use of industry waste materials and side flows is required to be more effective. In this research, a chemical precipitation method to simultaneously remove ammonium and phosphate from the reject water of anaerobic digestion plant using calcined paper mill sludge and fly ash as a precipitant, was tested. Paper mill sludge is a waste material formed in the paper-making process, and fly ash is another waste material formed in the power plant. Objective of this research was to test whether these industrial waste streams could be used as low cos…
Western blot characterization of exosomes isolated from rat plasma and evaluation of the efficiency of a precipitation method in exosome isolation
2017
Eksosomit ovat halkaisijaltaan 40-100 nm kokoisia solunulkoisia vesikkeleitä, joita solut erittävät solunsisäisen multivesikulaarisen rakkulan yhdistyessä solukalvoon. Eksosomit ovat tärkeässä roolissa solujen välisessä viestinnässä, sillä ne kuljettavat monenlaisia biomolekyylejä, kuten useita eri RNA-tyyppejä, lipidejä ja proteiineja. Aivoissa eksosomit liittyvät neurodegeneratiivisiin sairauksiin, kuten Parkisonin tautiin, Alzheimerin tautiin ja aivovammaan. Eksosomit kykenevät läpäisemään veri-aivoesteen, ja tutkijat ovatkin esittäneet paljon kiinnostusta eksosomien mahdollisuuksiin uutena hoitokeinona. Lisäksi eksosomien kuljettamat molekyylit sisältävät tietoa eksosomit erittäneen sol…
Fosforin jälkisaostus ja saostuskemikaalin kierrätys
2015
Tämän pro gradu -tutkielman kirjallisessa osiossa perehdyttiin fosforin saostamiseen vaikuttaviin tekijöihin ja mahdollisiin menetelmiin jatkokäsitellä puhdistetusta jätevedestä saostettua fosforisaostumaa, siten että saostuskemikaalin metalli olisi uudelleen käytettävissä ja fosfori teollisuudelle ja kasveille käyttökelpoisessa muodossa. Mahdol-lisiksi menetelmiksi jatkokäsittelyyn valikoituivat ioninvaihto ja kalsiumsaostus. Kokeellisessa osiossa fosforin saostamista puhdistetusta jätevedestä testattiin kolmella eri saostuskemikaalilla ja niistä saatujen saostumien liukenevuutta kokeiltiin eri happoihin ja emäksiin. Tämän lisäksi tutkittiin ioninvaihdon ja kalsiumsaostuksen toimivuutta sa…
Method development for determination and recovery of rare earth elements from industrial fly ash
2014
Rare earth elements (REE) are important in numerous high technology applications and in addition their supply risk is high, which gives rise to studying new sources for rare earth elements. Rare earth element concentrations in industrial fly ash samples collected from Finnish power plants, using a mixture of peat and biomass as a fuel, have been determined. Two sample pre-treatment methods, ultrasound- and microwave-assisted acid digestions, have been applied to fly ash samples. Measurement conditions for inductively coupled plasma-optical emission spectrometry (ICP–OES) have been optimized to reach robust plasma conditions and the reliability of the analysis has been investigated by using …
Use of Fe and Al containing electrocoagulation sludge as an adsorbent and a catalyst in water treatment
2023
In this study, three different electrocoagulation (EC) sludges were studied as an adsorbent (removal of humic acids) and as a catalyst [catalytic wet peroxide oxidation (CWPO) of bisphenol A (BPA)]. The sludges originated from electrocoagulation process in which aluminum (Al) and iron (Fe) electrodes were used for the treatment of mining industry wastewater. All the materials were used as dried sludge and calcined material. The stability of these materials was studied in neutral and alkaline conditions with analysis of the leached iron content in solution. Based on the EC sludge characterization with X-ray fluorescence (XRF), X-ray diffractometer (XRD), and diffuse-reflectance infrared Four…
Alkyl-Substituted Aminobis(phosphonates) : Efficient Precipitating Agents for Rare Earth Elements, Thorium, and Uranium in Aqueous Solutions
2021
The efficient and environmentally sustainable separation process for rare earth elements (REE), especially for adjacent lanthanoids, remains a challenge due to the chemical similarity of REEs. Tetravalent actinoids, thorium, and traces of uranium are also present in concentrates of REEs, making their separation relevant. This study reports six simple water-soluble aminobis(phosphonate) ligands, RN[CH2P(O)(OH)2]2 (1 R = CH2CH3, 2 R = (CH2)2CH3, 3 R = (CH2)3CH3, 4 R = (CH2)4CH3, 5 R = (CH2)5CH3, 6 R = CH2CH(C2H5)(CH2)3CH3) as precipitating agents for REEs, Th, and U, as well as gives insight into the coordination modes of the utilized ligands with REEs at the molecular level. Aminobis(phospho…