作者机构：
[史冬庆; 李怀恩] Northwest Water Resources and Environment Ecology, Key Laboratory of Ministry of Education, Xi'an University of Technology, Xi'an 710048, China;Department of Resource and Environment, Hunan Agricultural University, Changsha 410126, China;[邓娜] Northwest Water Resources and Environment Ecology, Key Laboratory of Ministry of Education, Xi'an University of Technology, Xi'an 710048, China, Department of Resource and Environment, Hunan Agricultural University, Changsha 410126, China
通讯机构：
[Deng, N.] N;Northwest Water Resources and Environment Ecology, Key Laboratory of Ministry of Education, Xi'an University of Technology, China
摘要：
This paper presents an investigation of the capacity of four different plants to remove and assimilate ferri-cyanide at different pH conditions. Detached roots of weeping willows (Salix babylonica L.), rice (Oryza sativa L. cv. JY 98), soybean (Glycine max L. cv. WH) and maize (Zea mays L. var. HK) were hydroponically exposed to ferri-cyanide in a closed system at 25 +/- A 0.5A degrees C for 24 h kept under darkness. Almost all applied ferri-cyanide was in the complex form in the hydroponic solution at pH a parts per thousand yen 7.0 in the absence of light, while dissociation of ferri-cyanide to free cyanide and iron in solution was detected at pH a parts per thousand currency sign 6.5. All plant species used were found to be able to remove and assimilate ferri-cyanide efficiently. The uptake and assimilation rates appeared to be inversely related to the pH, in which positive effects were observed at pH 6.0 and 6.5. Remarkable decreases in the assimilation rates were found at pH 8.0. Results presented here suggest that changes in solution pH have a substantial influence on not only the speciation of ferri-cyanide in the plant growth media, but also the uptake and assimilation mechanisms of ferri-cyanide by plants.
作者机构：
[Tang, Meizhen] Qufu Normal Univ, Qufu 273165, Peoples R China.;[Yuan, Min; Ma, Jianli] Tianjin Acad Environm Sci, Tianjin 300191, Peoples R China.;[Chen, Junfeng; Fu, Haili] Hunan Agr Univ, Coll Resources & Environm, Changsha 410128, Peoples R China.
通讯机构：
[Tang, Meizhen] Q;Qufu Normal Univ, Qufu 273165, Peoples R China.
会议名称：
1st International Conference on Energy and Environmental Protection (ICEEP 2012)
会议时间：
JUN 23-24, 2012
会议地点：
Hohhot, PEOPLES R CHINA
会议主办单位：
[Tang, Meizhen] Qufu Normal Univ, Qufu 273165, Peoples R China.^[Yuan, Min;Ma, Jianli] Tianjin Acad Environm Sci, Tianjin 300191, Peoples R China.^[Chen, Junfeng;Fu, Haili] Hunan Agr Univ, Coll Resources & Environm, Changsha 410128, Peoples R China.
会议论文集名称：
Advanced Materials Research
关键词：
coal mine;heavy metal contamination;soil enzymatic activities
摘要：
Soil enzymatic activities such as urease and invertase, were determined in areas polluted by Nesslers reagent colorimentric method and Mo-Phosphate colorimentric method in Yu Long coal mine, Shandong Province. The index of heavy metal pollution and the relationship between the activities of soil enzymes were analyzed. The results showed that the contents of heavy metals in contaminated soils were higher than those in unpolluted soils and the enzyme activities were decreased significantly with increasing contamination. The results of multivariate regression model test indicated that the elements of soil heavy metals have different influence on the soil enzymatic activities. It is feasible to use this index as a primary biochemical parameter to evaluate compound heavy metals pollution.
