Negative ions 4 anion exchange resin article 4 Adsorption 2 Animalia 2 Animals 2 Anion Exchange Resins 2 Annelida 2 Artificial particles 2 Atomic absorption spectrometers 2 Atomization 2 Biological Availability 2 Cation Exchange Resins 2 Chemical modification 2 Chemical remediation 2 Chromatography 2 Concentration (process) 2 Drinking water 2 Electrothermal atomic absorption spectrometry 2 Flow injection 2 Flow injection (FI) 2 Ion exchange 2 Lead 2 Lead bioavailability 2 Lead particle-water partition coefficients 2 Lumbriculus variegatus 2 Mathematical models 2 Oligochaeta 2 Particle Size 2 Permanent modifiers 2