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Correlation of physical and chemical indicators of water quality with the occurrence of bacteria of the genus Legionella spp. in the hot water supply systems : doctoral thesis
Full text linkU sklopu istraživanja putem Ankete su prikupljeni podatci o tehničko–tehnološkim karakteristikama triju hotela i jednog doma za starije i nemoćne osobe smještenih na području Splitsko–dalmatinske županije. Anketa je sadržavala podatke o izvoru vodoopskrbe, vrsti konstrukcijskog materijala razvodne i unutarnje mreže, o sustavu grijanja i tipu bojlera, o vremenu rada svakog objekta, te o potrošnji vode. U razdoblju od 2009. do 2012. godine analizirano je 425 uzoraka tople vode iz sva četiri objekta zajedno. U uzorcima su određeni fizikalno–kemijski pokazatelji (temperatura, pH, koncentracija slobodnog rezidualnog klora, Fe, Zn, Cu, Mn, Ca i Mg), te prisutnost i koncntracija bakterija Legionella spp.. Spearmanovim koeficijentom korelacije utvrđene su korelacije fizikalno–kemijskih pokazatelja i tehničko–tehnoloških karakteristika toplovodnih sustava s prisutnošću Legionella spp.. Temperatura je bitan čimbenik za razvoj biofilmova i u negativnoj je korelaciji s pojavom Legionella spp.. Iznad vrijednosti medijana od 53,10°C Legionella spp. je određena samo u dvama uzorcima, što znači da više temperature negativno utječu na kolonizaciju Legionella spp.. Dokazano je da slobodni rezidualni klor nije djelotvoran dezinficijens, jer je Legionella spp. identificirana u uzorcima bez i sa slobodnim rezidualnim klorom. Metalni ioni prisutni u vodi nastaju kao produkti korozije. Utvrđene su pozitivne korelacije koncentracija Fe i Zn s Legionella spp., dok je dokazano inhibitorno djelovanje veće koncentracije Cu na koncentraciju Legionella spp.. U 30,2% uzoraka vode iz toplovodnog sustava s pocinčanim cijevima identificirana je Legionella spp., a u 26,1% iz sustava s plastičnim cijevima. Ova razlika nije značajna, što se objašnjava pozitivnim djelovanjem organskih aditiva na razvoj Legionella spp., a koji dospijevaju u vodu iz građe plastičnih cijevi i gumenih brtvi. Također su i u sustavima s plastičnim cijevima ugrađeni razni metalni dijelovi, koji su podložni koroziji i pridonose povećanoj koncentraciji metalnih iona u vodi. Određen je približno isti broj uzoraka pozitivnih na Legionella spp. neovisno o vrsti sustava za pripremu tople vode.The research through the survey included data collection on the technical and technological characteristics from three hotels and one home for the elderly and disabled located in the Split – Dalmatia County. The survey included data on water supply source, type of construction material for the distribution and internal networks, heating system and water heater type, working hours of each facility, and water consumption. In the period from 2009 to 2012, 425 hot water samples from all four facilities have been analysed. Physical and chemical parameters (temperature, pH, free chlorine residual concentrations, Fe, Zn, Cu, Mn, Ca and Mg) were determined in the samples, as well as the presence and concentration of bacteria Legionella spp.. The Spearman correlation coefficient determined the correlations between the physical and chemical parameters and technical and technological characteristics of heating systems and the presence of Legionella spp.. The temperature is an important factor for the development of biofilms and it is in negative correlation with the appearance of Legionella spp.. Above the median value of 53.10°C, Legionella spp. has been determined in only two samples, which means that higher temperatures negatively affect the colonisation of Legionella spp.. It was proven that the free chlorine residual is not an efficient disinfectant, because Legionella spp. has been identified in samples with and without the free chlorine residual. Metal ions present in water occur as products of corrosion. Positive correlations between the Fe and Zn concentrations and Legionella spp. were established, while the inhibitory effect of a higher Cu concentration on Legionella spp. concentration was proven. Legionella spp. was identified in 30.2% of the water samples from the heating system with galvanised pipes, as well as in 26.1% of the samples from systems with plastic pipes. This difference is not significant, which is explained by the positive effect of organic additives that enter water from the structure of plastic pipes and rubber seals on the development of Legionella spp.. Systems with plastic pipes also have various metal parts, which are subject of corrosion and contribute to an increased concentration of metal ions in the water. Approximately the same number of samples positive to Legionella spp. was established regardless on the type of the hot water preparation system
Studija utjecaja štetnih otpada na procese hidratacije i fizikalno-kemijska te mehanička svojstva cementnih kompozita
Full text linkU radu je istraživan utjecaj mulja iz pogona pocinčavanja „ADRIA CINK“, smjese mulja i zeolita zasićenog cinkom, prirodnog zeolita iz nalazišta Donje Jesenje, olovo (II) oksida, olovo (II) kromata i amonijeva bikromata na ranu hidrataciju te fizikalno-mehanička svojstva industrijskog cementa tipa CEM I 42,5 R (proizvod cementare CEMEX Hrvatska). Određivanje početka i kraja vezanja provedeno je na uzorcima portland cementa uz različite dodatke mulja, zasićenog i prirodnog zeolita, smjese mulja i zasićenog zeolita, olovo(II) oksida, olovo(II) oksida (uz 20 mas. % zeolita u uzorku), olovo(II) kromata, olovo(II) kromata (uz 20 mas. % zeolita u uzorku), amonijeva bikromata i amonijeva bikromata (uz 20 mas. % zeolita u uzorku). Mjerenja su provedena Vicat-ovim aparatom i elektrokemijskom metodom pri temperaturi od 20 oC i vodocementnom, V/C i voda/kruto omjeru, V/K, 0,5. Određivanje vremena vezanja nije vršeno pri normalnoj konzistenciji zbog mogućnosti usporedbe rezultata s konduktometrijskim i mikrokalorimetrijskim mjerenjima. Utjecaj različitih dodataka (udjeli kao i kod određivanja vremena vezanja) na razvoj toplina (tijekom prvih 48 sati hidratacije) praćen je uporabom diferencijalne mikrokalorimetrije pri izotermnim uvjetima (T = 20 oC) i vodocementnom (V/C) i voda/kruto omjeru (V/K) 0,5. Iz dobivenih termonaponskih veličina su pomoću programa „Hidratacija cementa“ izračunate vrijednosti razvijenih toplina, brzina oslobađanja toplina i stupnjeva hidratacije. Praćenje rane hidratacije vršeno je određivanjem specifične provodnosti cementnih uzoraka uz različite dodatke mulja, smjese mulja i zas. zeolita, olovo(II) oksida, olovo(II) kromata i amonijeva bikromata. Mjerenja su provedena pomoću digitalnog konduktometra ISKRA MA 5924 i elektrode od nehrđajućeg čelika. Iz dobivenih vrijednosti vremena vezanja, oslobođene topline i specifične provodnosti određeni su matematički modeli prema kojima je moguće procijeniti vrijednosti vremena vezanja, maksimalno oslobođene topline i vrijeme pojave maksimalne provodnosti za bilo koji udjel ispitivanih dodataka mulja, smjese mulja i zas. zeolita, olovo(II) oksida, olovo(II) kromata i amonijeva bikromata. Izluživanje teških metala cinka, olova i kroma iz cementnih uzoraka uz različite dodatke provedeno je prema modificiranom dinamičkom testu NEN 7345. Uzorci za izluživanje su hidratizirani 28 dana pri izotermnim uvjetima (u termostatu pri 20 oC). Otopina za izluživanje je nakon 18, 72 i 168 sati zamijenjena svježom otopinom. Koncentracija iona cinka, olova i kroma u otopinama nakon izluživanja određena je EDXRF (engl. Energy Dispersive X-ray Fluorescence) uređajem za kvantitativnu analizu. Dobivene vrijednosti koncentracija su upotrebljene u difuzijskom modelu izluživanja za procjenu uspješnosti S/S procesa preko određivanja koeficijenata difuzije i srednjih vrijednosti indeksa izluživanja. Također su određeni mehanizmi po kojima dolazi do izluživanja metala iz stabiliziranih materijala. Analiza hidratacijskih produkata cementnih uzoraka uz različite dodatke hidratiziranih 28 dana pri izotermnim uvjetima (T = 20 oC) vršena je upotrebom toplinske analize (TG–DTG) i infracrvene spektroskopije (FTIR). Toplinskom analizom određena je količina nastalog kalcijeva hidroksida i kemijski vezane vode. U mortovima, gdje je dio cementa zamijenjen s 2, 5 i 10 mas. % mulja te 10, 20 i 30 mas. % zasićenog zeolita (uz 20 mas. % mulja u smjesi), određivan je utjecaj dodataka na tlačnu i savojnu čvrstoću u određenim periodima nakon 1, 2, 7 i 28 dana hidratacije i njegovanja u vodovodnoj vodi pri konstantnoj temperaturi od 20 ± 1 oC. Iz rezultata izluživanja (vrijednost srednjeg indeksa izluživanja metala) i tlačnih čvrstoća moguće je ocijeniti korišteni S/S proces i procijeniti maksimalno dopuštene količine dodataka u cementnom matriksu.In this paper it was investigated the influence of mud from the zinc plating plant "ADRIA CINK", a mixture of mud and zeolite saturated with zinc, natural zeolite from the site Donje Jesenje, lead(II) oxide, lead(II) chromate and ammonium bichromate on early hydration and physico-mechanical properties industrial cement type CEM I 42,5 R (product of CEMEX Croatia cement plant). Determination of the start and the end of setting time was performed on samples of Portland cement with different additions of mud, zeolite saturated with zinc, natural zeolite, mixture of mud and saturated zeolite, lead(II) oxide, lead(II) oxide (with 20 wt.% of zeolite in the sample), lead(II) chromate, lead(II) chromate (with 20 wt.% of zeolite in the sample), ammonium bichromate and ammonium bichromate (with 20 wt.% of zeolite in the sample). Measurements were performed by Vicat's apparatus and electrochemical method at a temperature of 20 °C and water/cement (V/C) and water/solid ratio (V/K) of 0,5. Determination of setting time was not done at normal consistency because of comparison with the conductometric and microcalorimetric results. Effect of different additions (content as well as in determining the setting time) on the development of heat (during the first 48 hours of hydration) was determined using differential microcalorimetry in isothermal conditions (T = 20 °C) and water/cement (V/C), and water/solid ratio (V/K) of 0,5. The obtained thermovoltage results are used in computer program "Hidratacija cementa" for calculation of developed heat, the heat release rate and degree of hydration. Monitoring the early hydration was performed by determining the conductivity of cement samples with different additions of mud, a mixture of mud and saturated zeolite, lead(II) oxide, lead(II) chromate and ammonium bichromate. The measurements were made using a digital conductivity meter ISKRA MA 5924 and electrode made of stainless steel. The matematical models were determined from the obtained values of setting time, heat release and conductivity which can be use for estimation of the value of setting time, maximum heat release and the time of maximum conductivity for any examined addition of mud, a mixture of mud and saturated zeolite, lead(II) oxide, lead(II) chromate and ammonium bichromate. Leaching of heavy metals (zinc, lead and chromium) from cement samples with different additions was carried out according to the modified dynamic leaching test NEN 7345. Samples were hydrated for 28 days at isothermal conditions (in the thermostat at 20°C). After 18, 72 and 168 hours leaching solution was replaced with fresh solution. Ion concentration of zinc, lead and chromium in solution after leaching was determined by EDXRF (Energy Dispersive X-ray Fluorescence) device for quantitative analysis. The concentrations were used in the diffusion leaching models for evaluation of S/S process by determining the diffusion coefficients and the leaching indices. Also, leaching mechanisms of metals from stabized materials were determined. Analysis of hydration products of cement samples with different additions of hydrated 28 days at isothermal conditions (T = 20 °C) was performed using a thermal analysis (TGDTG) and infrared spectroscopy (FTIR). Quantity of calcium hydroxide and chemically bound water was determined by thermal analysis. In mortars, where part of the cement was replaced with 2, 5 and 10 wt. % of mud and 10, 20 and 30 wt. % of saturated zeolite (with 20 wt.% of mud in the mixture), the impact of supplements on the compressive and flexural strength was determined on samples after 1, 2, 7 and 28 days of hydration and nourishing in tap water at a constant temperature of 20 ± 1 oC. S/S process can be evaluated from the leaching (average leaching index of metals) and compressive strength results and estimated the maximum acceptable amount of additions in the cement matrix
Istraživanje procesa u koloni s nepomičnim slojem u sustavu prirodni zeolit – vodena otopina olovova i cinkova nitrata
Full text linkIspitan je proces uklanjanja olova i cinka postupkom u koloni iz binarnih vodenih otopina ukupnih početnih koncentracija co(Pb+Zn) ≈ 1 mmol/l, a uz mijenjanje omjera co(Pb)/co(Zn) od 0,18 do 2,15. Eksperimenti su provedeni izotermno u staklenim kolonama s nepomičnim slojem prirodnog zeolita klinoptilolita visine 4, 8 i 12 cm. Tijek radnog ciklusa i ciklusa regeneracije pratio se određivanjem koncentracije Pb i Zn iona, te pH vrijednosti u efluentu i regeneratu. Monitoringom pH vrijednosti može se pouzdano i brzo procijeniti točka proboja i završetak regeneracije, što je za praktičnu primjenu od velikog značaja. Rezultati su prikazani krivuljama proboja i krivuljama regeneracije iz kojih su izračunati karakteristični parametri: kapacitet u točki proboja i iscrpljenja, efikasnost uklanjanja, simetrija krivulje proboja, visina zone prijenosa tvari, vrijeme kontakta, količina eluiranih iona, stupanj regeneracije i koncentracijski faktor. Uzastopnim ponavljanjem 12 radnih ciklusa i ciklusa regeneracije postignuto je višestruko iskorištenje zeolita bez smanjenja njegova kapaciteta. Do točke proboja Pb i Zn ioni vežu se istovremeno i razmjerno njihovoj koncentraciji u ulaznoj otopini, a u točki iscrpljenja udio vezanog Pb je veći zbog istiskivanja već vezanih Zn iona Pb ionima iz ulazne otopine. Ovaj je efekt potvrđen regeneracijom zeolita pri kojoj su omjeri količina eluiranih iona nR(Pb)/nR(Zn) značajno veći od Pb/Zn omjera, kao i SEM snimkama čestica zeolita te elementarnom EDS analizom. Regeneracijom zeolita postignuto je potpuno eluiranje iona, a volumeni regenerata su i do 10 puta manji od volumena izvorne otopine. To je od osobitog značaja za primjenu prirodnih zeolita u obradi otpadnih voda. Eksperimentalne krivulje proboja testirane su prema Thomasovu i ADR modelu. Utvrđeno je dobro slaganje eksperimentalnih s modelnim krivuljama proboja, te se dobio uvid u kinetiku i mehanizme prijenosa tvari tijekom procesa izmjene.Removal of lead and zinc from binary aqueous solutions with total initial concentrations co ≈ 1 mmol/l, at different ratios of co(Pb)/co(Zn) from 0,18 to 2,15 has been examined using the column method. Experiments were carried out isothermally in glass columns filled with natural zeolite up to bed depths of 4, 8 and 12 cm. Service and regeneration cycles were studied by monitoring of the Pb and Zn concentrations and pH values in the effluent and regenerate solutions. The measurement of pH values allows efficient determination of the breakthrough point and the end of regeneration. The results are shown by breakthrough curves and regeneration curves and the following characteristic parameters have been calculated: breakthrough and exhaustion capacities, removal efficiency, symmetry of breakthrough curves, height of the mass transfer zone, empty bed contact time, quantity of eluted ions, degree of regeneration, and the concentration factor. Twelve successful service and regeneration cycles were carried out without reducing zeolite capacity. Up to breakthrough, Pb and Zn ions were bound simultaneously according to their concentrations in the influent, while at the exhaustion point the quantity of bound Pb was higher. This is due to the displacement of bound Zn by Pb from the feeding solution. This effect has been confirmed by regeneration of zeolite where the ratio of quantities of eluted ions nR(Pb)/nR(Zn) was much higher than the Pb/Zn ratio in the influent. The displacement effect has also been confirmed by SEM images of zeolite particles and elemental EDS analysis. The regeneration of zeolite provides for complete elution of bound ions and the volumes of regenerates were up to 10 times lower compared to the volume of solutions in service cycles. This contributes to the application of natural zeolites in wastewater treatment processes. The experimentally obtained breakthrough curves have been tested according to the Thomas and the ADR models. The modelled curves showed very good agreement with the experimental ones, and were helpful in estimation of kinetic parameters and mechanisms of mass transfer during the overall process
Development of biodegradable metallic implants : influence of surface modification on the rate of decomposition and biocompatibility : doctoral thesis
Full text linkRazvoj biorazgradivih metalnih implantata izazovan je zadatak jer od materijala zahtjeva da u potpunosti ispuni inženjerske, kemijske i medicinske zahtjeve. Magnezij i njegove legure dobri su potencijalni materijali za izradu biorazgradivih implantata. Njihovom primjenom smanjuje se mogućnost pojave induciranog stresa. Problem koji je potrebno riješiti je brza korozija Mg i Mg legura koja uzrokuje gubitak mehaničkog integriteta, prije zacjeljivanja tkiva. Funkcionalizacija površine Mg implantata provedena je kako bi se nastali produkti dekompozicije mogli izlučiti iz organizma ne narušavajući njegovu biokompatibilnost. Površine Mg i Mg legure modificirane su samoorganizirajućim organskim i bioaktivnim keramičkim filmovima. Najvažniji čimbenik u dizajniranju biorazgradivih metalnih implantata bila je: (i) in situ analiza aktivne interfazne granice metal/fiziološka otopina i (ii) karakterizacija modificiranih površina površinsko-analitičkim metodama. S fundamentalnog i aplikativnog stajališta provedena istraživanja značajna su za razumijevanje procesa koji se zbivaju na granici faza biorazgradivi metalni implantat/realni biookoliš.Development of biodegradable metallic implants is a complex task, because it combines engineering, chemical and medical requests of materials. Mg and Mg alloys are the potential biodegradable implant materials. Similar mechanical properties of Mg and bone can reduce the appearance of the induced stress. However, Mg and Mg-alloy in body fluids corrode rapidly, causing loss of mechanical integrity, before the tissues have sufficient time to heal. The aim of this work was functionalization of Mg implants, so that the resulting products of the decomposition can extract from the body without compromising its biocompatibility. Mg and Mg alloy surfaces were modified with self-assembled organic films and bioactive ceramic films. The most important factor in designing biodegradable metallic implants was: (i) in situ analysis of the active metal/physiological solution interphase and (ii) characterization of the modified surface with surface-analytical methods. From the fundamental and applicative point of view, performed research is relevant to the understanding of the processes that occur at the biodegradable metal implant/real bioenvironment interface
Modelling pollution indicators of municipal wastewater of Split
Full text linkUpravljanje kvalitetom vode danas je najvažnija aktivnost zaštite okoliša. Indikatori kvalitete vode određuju se prema klasifikaciji, gdje je uzeta u obzir integracija parametara kvalitete vode i Pravilnika o kvaliteti vode. U ovom radu provedena je karakterizacija i klasifikacija pokazatelja onečišćenja komunalne otpadne vode grada Splita na osnovi rezultata mjerenih parametara dobivenih svakodnevnim monitoringom na ispustima šireg područja kroz period od 4 godine. Temeljem dobivenih eksperimentalnih podataka provedena je osnovna statistička analiza određivanja srednjih vrijednosti, medijana, standardne devijacije, minimalnih i maksimalnih vrijednosti, te njihovih međusobnih korelacijskih koeficijenata. Dobivene su izrazito visoke koncentracije za kloride i sulfate kao i za ukupnu suspendiranu tvar te za kemijsku potrošnju kisika (KPK) koji nekoliko puta prelaze maksimalno dozvoljenu koncentraciju (MDK). Medijan vrijednosti bile su za sva onečišćenja niže od njihovih srednjih vrijednosti osim za biološku potrošnju kisika (BPK5) i pH. Najviša vrijednost koeficijenta varijacije dobivena je za N-NO2 na Lokacijama 2 i 3, a za deterdžente na Lokaciji 1. Najmanji koeficijent varijacije zabilježen je za pH vrijednost na svim lokacijama. Provedena je prostorna i vremenska karakterizacija pokazatelja onečišćenja korištenjem različitih kemometrijskih tehnika (klaster analiza CA, faktorske analize FA, analize glavnih komponenata PCA). Prostorna klaster analiza pokazala je podjelu klastera u dvije grupe; klaster I formira Lokacija 2 i 3, a klaster II Lokacija 1. Prema vremenskoj klasifikaciji promatrano razdoblje moguće je podijeliti na razdoblje 2006.-2007. i razdoblje 2008.-2009. Provedene statističke analize poslužile su kao baza za dva linearna modela. Izrađeni su viševarijantni linearni model (MLR) i model lokalne linearne regresije (PLR) za predviđanje najznačajnijih pokazatelja onečišćenja KPK i BPK5 s devet nezavisnih varijabli. Dobiveni regresijski koeficijenti viševarijantnog linearnog modela iznose R2 = 0,306 – 0,448, dok regresijski koeficijenti za model lokalne linearne regresije iznose R2 = 0,534 – 0,683. Indeks kvalitete otpadne vode grada Splita određen je na temelju pravila neizrazite logike, koja predstavljaju kvalitetu vode putem jezičnih pojmova. Nakon primarne obrade, kvaliteta vode na Lokaciji 1 ocjenjena je kao „dobra“ sa stupnjem pripadnosti 0,476, dok za druge dvije lokacije prema stupnju pripadnosti (0,981 i 0,351) kvaliteta vode je ocjenjena kao „korektna“.Water quality management is the most significant environmental activity today. Water quality indicators were estimated according to classification, where the integration of water quality parameters and Water Quality Regulations were taken into consideration. In this paper, the quality of primary treated urban wastewater, discharged at three locations into the Adriatic Sea, is described based on the results of measured parameters obtained daily monitoring on drain locations wider Split area over a period of 4 years. Experimental data were analyzed by basic statistical methods for determination of mean and median values, standard deviations, minimal and maximal value of the measured parameters and their mutual correlation coefficients. The results obtained showed extremely high concentrations for chlorides, sulphates, total suspended solids and for chemical oxygen demand (COD) which several times exceed the maximum allowed concentration (MAC). Median values were lower for all pollutants from their mean values except biological oxygen demand (BOD5) and pH. The highest value of the coefficient of variation was obtained for N-NO2 at Locations 2 and 3, and for detergents at Location 1. The lowest coefficient of variation was recorded for pH value at all locations. Different chemometric techniques such as cluster analysis (CA), factor analysis (FA) and principal component analysis (PCA) were established to investigate spatial and temporal characterization of pollution indicators. Spatial cluster analysis showed the distribution of clusters in two groups; cluster I is formed by Locations 2 and 3 and cluster II is formed by Location 1. The observed time period can be divided in the period 2006-2007 and the period 2008-2009 according temporal classification. The statistical analyses were used as bases for two linear models. Multivariate linear regression model (MLR) and piecewise linear regression (PLR) were made to predict the most important pollution indicators COD and BOD5 with 9 independent variables. The obtained regression coefficients for multivariate linear model amounts R2 = 0.306 – 0.448, while regression coefficients for piecewise linear regression model amounts R2 = 0.534 – 0.683. Municipal wastewater quality index in the city of Split, based on the fuzzy set rules that represent water quality via linguistic terms. After primary treatment, water quality, at Location 1 was estimated as “good” with the highest degree of membership of 0.476, while at other two locations regarding to highest degrees of membership (0.981 and 0.351), water quality was estimated as “fair”
Spatial and temporal distribution of antrhopogenic elements in Kastela Bay sediment : doctoral thesis
Full text linkKaštelanski zaljev je poluzatvoreni zaljev u kojem je zbog razvoja industrije u drugoj polovici XX stoljeća došlo do povećanja koncentracija različitih antropogenih elemenata. Antropogeni elementi koji su dospjeli u sediment mogu biti trajno ugrađeni u kristalnu rešetku sedimenta. Kada dođe do promjena u geokemijskom sastavu i okolnom moru, promijene se kemijski i biološki uvjeti ravnoteže i antropogeni elementi se mogu izluživati, te kao takvi mogu postati zagađivala ako prijeđu nazad u morski stupac. Ovaj rad opisuje prostornu i vremensku raspodjelu antropogenih elemenata u sedimentu Kaštelanskog zaljeva. Istraživanja su obuhvatila lokacije različite po udaljenosti od obale, dubini i vjerojatnosti prisutnosti antropogenih utjecaja. Uzorkovanja su provedena tijekom cijele godine, što je osim parametra vremena uključivalo i meteorološke parametre. Sinteza dobivenih rezultata, te zaključci o prostornoj i vremenskoj raspodjeli predstavljaju esencijalnu informaciju pri budućim promišljanjima i planiranjima ciljeva zaštite okoliša Kaštelanskog zaljeva.Kaštela Bay is semi-enclosed bay where, due to fast industrial development during second half of 20 th This work will describes spatial and temporal distribution of anthropogenic elements in Kaštela Bay sediment. The studies involve locations different by distance from coast, sea depth and pos sibility of anthropogenic influence. Samplings were conducted during the whole year including, among the time parameter, the meteorological parameters as well. The obtained results synthesis and conclusions related to spatial and temporal distribution present essential information in considering and planning of Kaštela Bay environmental protection policy. century, concentrations of anthropo genic elements in sediments are increased. Released anthropogenic elements might be permanently incorporated in crystal sediment lattice. Variations in geochemical composition of sediments and surrounding water cause changes of chemical and biological equilibrium that might initiate leaching of anthropogenic elements. These elements become pollutants if they are released back to the water column