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不同浓度水Hg灌溉对水稻产量和品质的影响 被引量:5
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作者 王铁良 于东洋 +3 位作者 李玉清 周雪梅 侯升久 马世林 《节水灌溉》 北大核心 2013年第1期11-13,17,共4页
通过土培桶栽水稻试验,以辽宁中部灌区近几年水质状况为背景,研究了灌溉水中重金属汞(Hg)的浓度对水稻产量和品质的影响。结果表明,当灌溉水Hg浓度在0.056mg/L以下时,对水稻结实率、每盆产量、穗长的影响不显著,对水稻的碾米品质无明显... 通过土培桶栽水稻试验,以辽宁中部灌区近几年水质状况为背景,研究了灌溉水中重金属汞(Hg)的浓度对水稻产量和品质的影响。结果表明,当灌溉水Hg浓度在0.056mg/L以下时,对水稻结实率、每盆产量、穗长的影响不显著,对水稻的碾米品质无明显不利影响,对水稻的营养品质中蛋白质、直链淀粉含量无明显不利影响,对脂肪酸含量有抑制作用;低浓度的水Hg溶液对水稻每穗粒数、千粒重有促进作用;通过SPSS统计分析,稻米中的Hg含量与灌溉水中Hg的浓度呈显著正相关关系,当灌溉水中Hg的浓度超过0.008 3mg/L时,稻米中的Hg含量超过国家农业行业标准里的指标值(0.01mg/kg)。 展开更多
关键词 水hg 产量 稻米品质
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Toxicity Effect of Hg^(2+) and Cr(VI) on Alga Growth in Eutrophic Water
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作者 毕东苏 钱春龙 《Agricultural Science & Technology》 CAS 2007年第3期25-28,72,共5页
[ Objective] The toxicity effect of Hg^2+ and Cr(Ⅵ) on alga growth in eutrophic water was studied to provide reference for biomonitoring and bioremediation of eutrophic water. [ Method ] The mother liquid of alga,... [ Objective] The toxicity effect of Hg^2+ and Cr(Ⅵ) on alga growth in eutrophic water was studied to provide reference for biomonitoring and bioremediation of eutrophic water. [ Method ] The mother liquid of alga, which was separated from the eutrophic water, were put into the solutions of Hg^2+ and Cr(Ⅵ) with different concentrations and their mixture solution, respectively. And the toxicity effect of Hg^2+ and Cr(Ⅵ) on the growth and propagation of alga in eutrophic water was observed. [ Result] The alga in eutrophic water performed rather sensitive to Cr(Ⅵ) and when its concentration was over 1 mg/L, threre was obvious effect on alga growth. The alga was not very sensitive to Hg^2+ when its concentration was lower, but its toxicity became stronger and stronger when its concentration increased to some extent and the toxicity effect of Cr(Ⅵ) on alga growth was just on the contrary. When the ion concentration was lower than 10 mg/L, the toxicity of Hg^2+ on alga was lower than that of Cr(Ⅵ). When the concentration was over 10 mg/L, the toxicity of Hg^2+ exceeded that of Cr(Ⅵ). The toxicity of ion mixture solution of Hg^2+ and Cr(Ⅵ) had synergism inhibition on alga, which could be performed only when the concentration was over 4 mg/L. [ Conclusion] The toxicity of heavy metal on alga not only related to the alga cell, but also related to the concentration of heavy metal ion. 展开更多
关键词 ALGA hg^2+ Cr(Ⅵ) Toxicity effect
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Electrochemical properties of magnesium alloy anodes discharged in seawater 被引量:5
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作者 余琨 黄俏 +1 位作者 赵俊 戴翌龙 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2012年第9期2184-2190,共7页
Magnesium alloys can be developed as anode materials for seawater activated batteries. The electrochemical properties of AZ31, AP65 and Mg-3%Ga-2%Hg alloy anodes discharged in seawater were studied. The potentiodynami... Magnesium alloys can be developed as anode materials for seawater activated batteries. The electrochemical properties of AZ31, AP65 and Mg-3%Ga-2%Hg alloy anodes discharged in seawater were studied. The potentiodynamic polarization shows that the Mg-3%Ga-2%Hg alloy provides more negative corrosion potentials than AZ31 or AP65 alloy. The galvanostatic discharge results show that the Mg-3%Ga-2%Hg alloy exhibits good electrochemical properties as anodes in seawater. And the EIS studies reveal that the magnesium alloy anode/seawater interfacial process is determined by an activation controlled reaction. The Mg3Hg and Mg21Ga5Hg3 phases in Mg-3%Ga-2%Hg alloy improve its electrochemical properties better than the Mg17(Al,Zn)12 phase in AZ31 and Mg(Pb) solid solution phase in AP65 alloys. 展开更多
关键词 magnesium alloy Mg-Ga-hg alloy electrochemical properties seawater activated battery ANODE
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