H

haemocyanin 337 haemoglobin 336, 337 hard clam (Mercenaria mercenaria) 310 hardness 159, 277-279, 283-284,

287, 290-294, 299, 302, 354 hardness normalisation 295 hazardous concentration 324 hazardous waste 34 HCl extraction efficiency 188 heat exchangers 7, 57, 101 Helisoma spp 186 Henriksdal 56-59 heterotrophic nitrogen fixation 117

Hexagenia spp 320

high affinity binding site on the oxide surface 257 high affinity Zn1 sites 250 high-affinity Cu binding site 247 histidine

Cu binding ligand 228-229 homeostasis 109, 278, 333-335 humic substances 140, 147, 153,

205, 222, 224, 248, 262, 361 Hyalella azteca 186, 320, 344 hydrolysis constants 221

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