Odstranjevanje nitratov iz pitne vode z vlakni iz aktivnega oglja

diplomsko delo visokošolskega strokovnega študijskega programa

Dejan Antolin (Avtor), Marjana Simonič (Mentor), Andreja Goršek (Komentor)

Povzetek

Namen diplomskega dela je preveriti učinkovitost vlaken iz aktivnega oglja za odstranitev nitratov iz pitne vode. Uporabljali smo vlakna Zorflex® ACC iz 100% aktivnega oglja. Na razpolago smo imeli vlakna v tkani in v pleteni obliki. Proučevali smo učinkovitost obeh vrst vlaken ter jih primerjali. Vlakna smo modificirali z različnimi kemikalijami, da bi izboljšali njihovo učinkovitost. Preverili smo, ali lahko eno vlakno uporabimo večkrat. Zato smo vlakna regenerirali. Spreminjali smo temperaturo, da bi ugotovili njen vpliv na adsorpcijo nitratov. Pred, med in po obdelavi vlaken smo spremljali fizikalno kemijske parametre. V prvem delu smo poizkuse izvajali z modelno vodo, v drugem delu pa z realno vodo iz Mariborskega in Ptujskega vodovoda. Vsebnost nitratov v vodi se je gibala okrog 50 mg/L. V prvem delu smo ugotovili, da so vlakna, modificirana s kislino H2SO4 (c = 4 mol/L) najučinkovitejša. Adsorbira se do 2,5 krat več nitratov, kot pri z vlakni, modificiranimi s H2O2. Iz modelne vode smo odstranili do 50 % nitratnih ionov, kar pomeni da se je na vlakna adsorbiralo 25 mg(NO3-). Najprimernejša je bila temperatura 25 °C, saj pri višjih temperaturah nismo dosegli boljše učinkovitosti. Adsorpcija nitratnih ionov v pitni vodi je veliko slabša, kot v modelni. Predvidevamo, da v pitni vodi adsorpcijo nitratov motijo drugi anioni, ki so prisotni v vodi. Ugotovili smo, da lahko z vlakni Zorflex® ACC odstranimo manjše količine nitratnih ionov.

Ključne besede

nitrati;pitna voda;aktivno oglje;modifikacija;

Podatki

Jezik:	Slovenski jezik
Leto izida:	2013
Tipologija:	2.11 - Diplomsko delo
Organizacija:	UM FKKT - Fakulteta za kemijo in kemijsko tehnologijo
Založnik:	[D. Antolin]
UDK:	628.35:66(043.2)
COBISS:	17474582
Št. ogledov:	2297
Št. prenosov:	208
Ocena:	0 (0 glasov)
Metapodatki:

Ostali podatki

Sekundarni jezik:	Angleški jezik
Sekundarni naslov:	NITRATE REMOVAL FROM DRINKING WATER USING FIBRES
Sekundarni povzetek:	The purpose of the thesis is to examine the efficiency of activated carbon fibres for the removal of nitrates from drinking water. We used Zorflex® ACC fibres made of 100 % activated carbon. Two types of fibres were available, e.g. woven and knitted fibres. We examined the efficiency of both types of fibres and compared them. We modified the fibres with different chemicals, to improve the efficiency. We checked whether one fibre can be used multiple times. We changed the temperature to find if temperature affects the adsorption of nitrates. We monitored the physical and chemical parameters of the fibres before, during and after the treatment. During the first part of the experiment model water was used and real water in the second part. Real water used was from the Maribor and Ptuj waterworks. The content of nitrates in drinking water was around 50 mg/L. The first part of the experiment proved that the most effective fibre was the one modified with H2SO4 (c = 4 mol/L) acid. 2.5 times more nitrates were adsorbed in comparison with the fibres modified with H2O2. On this way we removed up to 50 % of all nitrate ions from the model water, which means around 25 mg(NO3-) were adsorbed by the fibre. The most appropriate temperature was 25 °C. We didn't manage to achieve better results at higher temperatures. The adsorption of nitrate ions in drinking water is worse as in the model water. We assume that the adsorption of the nitrates is diminished by the presence of other anions in the water. We found that smaller amounts of nitrate ions can be removed with Zorflex® ACC fibres.
Sekundarne ključne besede:	nitrate;drinking water;carbon cloths;modification;
URN:	URN:SI:UM:
Vrsta dela (COBISS):	Diplomsko delo
Komentar na gradivo:	Univ. v Mariboru, Fak. za kemijo in kemijsko tehnologijo
Strani:	VIII, 52 f.
ID:	8726174