Toxic effects of Al-based coagulants on Brassica chinensis and Raphanus sativus growing in acid and neutral conditions

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	Toxic effects of Al-based coagulants on Brassica chinensis and Raphanus sativus growing in acid and neutral conditions
	Zhang, KS; Zhou, QX; Zhou, QX, Chinese Acad Sci, Key Lab Terrestrial Ecol Proc, Inst Appl Ecol, Shenyang 110016, Peoples R China
刊名	ENVIRONMENTAL TOXICOLOGY
	2005
卷号	20 期号:2 页码:179-187
关键词	Ecotoxicological Effect Root Elongation Seed Germination Aluminum-based Coagulation Wastewater Treatment
ISSN号	1520-4081
英文摘要	The ecotoxicological effects of aluminum (Al)-based coagulants are of concern because of their wide-ranging applications in wastewater treatment and water purification. As important Al-based coagulants, AlCl3 and PAC (polyaluminum-chloride) were selected as examples to examine the toxic effects on representative vegetables including the cabbage Brassica chinensis and the radish Raphanus sativus over a range of exposure concentrations in neutral (pH 7.00) and acidic (pH 4.00) conditions, using seed germination and root elongation in the early-growth stage as indicators of toxicity. The results showed that root elongation of the two vegetables was a more sensitive indicator than was seed germination for evaluating the toxicity of Al. As a single influencing factor, HI had no significant direct effects on root elongation of Brassica chinensis and Raphanus sativus under the experimental conditions. The toxicity of Al played the main role in inhibiting root elongation and seed germination and was strongly related to changes in pH. There was a markedly positive relationship between the inhibitory rate of root elongation, seed germination, and the concentration of Al at pH 4.00 (p < 0.01). The toxic effect of AlCl3 on Brassica chinensis was less with a neutral pH than at pH 4.00, but Raphanus sativus was more susceptible to AlCl3 toxicity at a neutral pH than at pH 4.00. Both Raphanus sativus and Brassica chinensis had a more toxic response to a low concentration (< 64 mg (.) L-1) of PAC in a neutral condition than in an acidic condition. Undoubtedly, the Al toxicity caused by Al-based coagulants at a neutral pH is relevant when treatment solids are used in agriculture. (c) 2005 Wiley Periodicals, Inc.
学科主题	Environmental Sciences ; Toxicology ; Water Resources
语种	英语
WOS记录号	WOS:000228320600009
公开日期	2011-09-23
内容类型	期刊论文
源URL	[http://210.72.129.5/handle/321005/55163]
专题	沈阳应用生态研究所_沈阳应用生态研究所
通讯作者	Zhou, QX, Chinese Acad Sci, Key Lab Terrestrial Ecol Proc, Inst Appl Ecol, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Zhang, KS,Zhou, QX,Zhou, QX, Chinese Acad Sci, Key Lab Terrestrial Ecol Proc, Inst Appl Ecol, Shenyang 110016, Peoples R China. Toxic effects of Al-based coagulants on Brassica chinensis and Raphanus sativus growing in acid and neutral conditions[J]. ENVIRONMENTAL TOXICOLOGY,2005,20(2):179-187.
APA	Zhang, KS,Zhou, QX,&Zhou, QX, Chinese Acad Sci, Key Lab Terrestrial Ecol Proc, Inst Appl Ecol, Shenyang 110016, Peoples R China.(2005).Toxic effects of Al-based coagulants on Brassica chinensis and Raphanus sativus growing in acid and neutral conditions.ENVIRONMENTAL TOXICOLOGY,20(2),179-187.
MLA	Zhang, KS,et al."Toxic effects of Al-based coagulants on Brassica chinensis and Raphanus sativus growing in acid and neutral conditions".ENVIRONMENTAL TOXICOLOGY 20.2(2005):179-187.