[Ecological toxicity of aluminum-based coagulant on representative corps in neutral environment].
By the terrestrial ecotoxicological methods of seed germination and root elongation, and with aluminum-based coagulant AlCl3 which was widely used in wastewater- and water treatment as an example, this work studied the toxicological effects of aluminum-based coagulants on representative crops, including radish Raphanus sativus, cabbage Brassica chinensis and wheat Triticum aestivum, over a range of exposure concentrations under the neutral condition (pH= 7.0), with contrast to an acid condition (pH= 4.00). The results indicated that there was a significantly positive correlation between the concentration of AlCl3 and the inhibitory rate of root elongation and seed germination either under pH 7.0 or 4.0 (P < 0.01). Cabbage and wheat was more susceptive to AlCl3 toxicity under acid than under neutral condition, while radish was in adverse. The minimum inhibitory concentration of AlCl3 (< 2.0 mg x L(-1)) was lower under neutral than under acid condition.
Key Laboratory of Terrestrial Ecological Process, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, China. zhangkaisa@hotmail.com
Kaisong
K
Zhang
Qixing
Q
Zhou
D000077410:Aluminum Chloride; D017607:Aluminum Compounds / Q000032:analysis* / Q000633:toxicity; D002712:Chlorides / Q000032:analysis* / Q000633:toxicity; D003029:Coagulants; D018556:Crops, Agricultural / Q000187:drug effects* / Q000254:growth & development; D017753:Ecosystem; D004785:Environmental Pollutants / Q000032:analysis* / Q000633:toxicity; D018525:Germination / Q000187:drug effects; D014865:Waste Disposal, Fluid / Q000379:methods*
D017607:Aluminum Compounds; D002712:Chlorides; D003029:Coagulants; D004785:Environmental Pollutants; D000077410:Aluminum Chloride