Hidrológiai Közlöny 1997 (77. évfolyam)
66 2. Krishnamurty, K. V., Shpirt E. and RedJy, KI. M. (1976) Trace mclal extraction of soils and sediinenU by nilric acid-hydrogen peroxide. Atom. AbsorpL NewsIclL 15, 68-70. 3. Paus, P. E. (1972) Uotnb decomposilion of biological malcrials. Atom. Absorpl. NewslelL 11, 129-130. 4. V.-Balogh, Katalin and Mastala, Z. (1994) Tlic iiiHucncc of sizc and glocliidia bearing upon tlie lieavy mclal accumulalion in gills of Anodonta piscinalis (Nills.). Cliemosplicre, Vol. 28, No. 8., pp. 1539 - 1550. 5. V.-Balogh Katalin, (1988) Kandidátusi Értekezés. 6. Salánki János és Farkas Anna (1995) A llg J* és Cd 1' koncentrációlílggö felvétele tavikagylóban. Bionionilorozás-Biodivcrzitás, XXXVII. Hidrobiológus Napok, Tihany. Cd and i'h acciiinulation and rclalcd clinnges in tlicjcoiicentration of ollicr inctal.s in tlic organs of frcsliwater musscl during long ternt exposure Farkas, Anna - Salánki, János Balaton Linmological Research Institute of the Hungárián Academy of Sciences Aiiodonla cygnca individuals wcrc exposed in laboralory lo Cd and Pb at a constant Icvcl of 0.05 mg/1. The exposure laslcd 12 vvceks for Cd and 10 wccks for Pb. In bolli cases exposure was followcd by a tliree wccks long outwash period. The concentration of lieavy inclals was nicasurcd intlie hcmolyinpli, niantlc, fool, oulcr- and inner gills in ten individuals, eacli tiinc. The concentration of Cd incrcascd significanlly in cacli sludied organ williout rcacliing tlic stcady statc during the treatmant. The accumulalion of lliis mclal was liigher in the niantlc and tlic imicr gill of tlic inussels by onc order of magnilude tlian in ollier organs. Significant increasc ofthe Cu and Zn conccnlralions could bc observed in llic organs during llic Cd exposure. Within one week of outwash, a significant dccreasc in Cd concentration occurrcd in the hcmolympli, niantlc and ituier gill, wliile in llic outer gill a significant increasc could bc dclcclcd. No further rclcase of Cd could bc dctcctcd during tluee weeks of oulwasli. During Pb exposure, a significant incrcase occurrcd in the outer- and inner gill of musscls, in the niantlc a lesser accumulalion could be delcclcd and no significant change occurrcd in tlic Pb conccnlralion ofthe licmolyinph and of the foot. The accumulalion of lead was accompanicd by a significant incrcase in llic Cd and Zn concentration of the organs, while the Cu concentration of lissucs proved lo remain constant. The conccnlralion of thesc mctals incrcascd cspecially in tlic outer gill and to a lesser cxlenl in llic inner gill and tlic foot. During the first wcck of outwash a sliglit rclcase of Pb took placc in llic gills wliicli bccamc significant by tlic end of the lliird week.
