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Acute toxicity of cadmium, copper, mercury, and zinc to ciliates from activated sludge plants

Environmental ChemistryEngineeringEnvironmental EngineeringSludge PlantsMetalloid ContaminationMetal ContaminationEnvironmental RemediationTrace MetalBioaccumulationToxicologyMetal ToxicityEcotoxicologyEnvironmental ToxicologyAcute ToxicityWaste ManagementWastewater Treatment