Solution culture experiment was carried out to investigate copper and zinc combined toxicity to wheat under different calcium concentrations and copper-zinc concentration ratios. The TUfmix-BLM model of copper-zinc combined toxicity was established based on toxicity unit model( TU) and biotic ligand model( BLM). The results showed that the toxicity of single copper and zinc was decreased significantly with the increasing calcium concentration.Under different calcium concentrations and different ratios( 1 ∶ ...
1引言(Introduction)土壤环境中重金属污染往往不以单一形式存在,而是以两种甚至多种重金属复合的形式出现(曹心德等,2011;Cao et al.,2003;Cao et al.,2009;Yoon et al.,2006).复合重金属对生物的毒害要比单一元素复杂得多(郑振华等,2001),其毒性可能表现出拮抗、加和、协同或