{"refrec":{"BRefID":13143,"RR":"<b>van Eck, B.T.M.</b> (1974). Onderzoek naar het gedrag van koper, zink, mangaan en ijzer in de westelijke Waddenzee. <i>NIOZ-rapport</i>, 1974(12). Nederlands Instituut voor Onderzoek der Zee: Texel. 64 pp.","BEntID":13143,"PublicFlag":1,"CheckedFlag":0,"wosflag":0,"vabbflag":0,"RefStringPartII":". <i>NIOZ-rapport</i>, 1974(12). Nederlands Instituut voor Onderzoek der Zee: Texel.  64 pp.","DocTypID":13,"DocType":"Reports","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"van Eck, B.T.M.","OrigTitleTranslFlag":1,"Authorstringtrunc":"van Eck, B.T.M.","Englishabstract":"Water, suspended and bottom sediment samples in the western part of the Dutch Wadden Sea have been analyzed for their metal content (Cu, Zn, Mn, Fe). For sediment samples the total amount, the exchangeable and leachable (according to Chester and Hughes) fractions of these metals were determined. For suspended samples only the leachable fraction was determined. 0.1 N HCl appeared to be the most preferable leaching agent to determine the leachable fraction. It caused 5% clay mineral lattice breakdown. The levels of metals in water show a non-conservative character. The levels of metals in suspended matter cannot be explained by particle size differences (fraction&lt;16µm according to De Groot).","AbstractOtherLang":"Gedurende een drietal tochten op de westelijke Waddenzee werden het koper en zinkgehalte van water en het koper, zink, mangaan en ijzergehalte van zwevend bodemmateriaal bepaald, samen met een aantal andere algemene hydrografische gegevens. Met de onder hoofdstuk IV.2 vermelde procedure konden de metaalgehalten voldoende nauwkeurig en reproduceerbaar bepaald worden. Van de sedimenten werden het totale, het uitwisselbare en het reduceerbare metaalgehalte bepaald. Van het zwevend materiaal alleen het reduceerbare metaalgehalte. 0.1 N HCl bleek een geschikt extractiemiddel te zijn voor de bepaling van het reduceerbare metaalgehalte. Bij de bepaling werd 5 tot 10% van de totale hoeveelheid kleimineralen afgebroken.","BibLvlCode":"MS","StandardTitle":"Onderzoek naar het gedrag van koper, zink, mangaan en ijzer in de westelijke Waddenzee","OrigTitleLangCode":"nl","OrigTitleLangCodeExtended":"dut","OrigTitleLangID":41,"DateLastModified":{"date":"2025-07-22 01:33:06.175990","timezone_type":1,"timezone":"+02:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":null,"OtherDescriptors":null,"Notes":null,"AnaPub":null,"MonPub":1974,"DateUpdate":"2025-07-15","DateCreate":"2001-07-10","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":null,"VABBcode":null,"OpenAcc":1},"refs":null,"anarec":null,"monrec":{"MonID":13143,"ISBN":null,"PubliDate":1974,"IssueDate":null,"Volume":"1974","Issue":"12","Pagination":"64","Place":"Texel","Edition":null,"BRefXtra":null,"BRefXtraRR":null,"SerID":5697,"SerRR":"NIOZ-rapport. Netherlands Institute for Sea Research (NIOZ): Den Burg.  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