Pb, Hg and Cd will affect human health by vegetative chain. In recent years, people more and more are concerned about heavy metal pollution of the soil-plant system. Many researchers studied the effect of single heavy...Pb, Hg and Cd will affect human health by vegetative chain. In recent years, people more and more are concerned about heavy metal pollution of the soil-plant system. Many researchers studied the effect of single heavy metal on growth, photosynthesis, respiration and quality of plants, but few systematicstudies of the effect of heavy metals on the scavenging system of activated oxygen of plants. This note systematically studies the effect of Pb, Hg and Cd in soil on the scavenging system of activated oxygen in tobacco leaves. 1 Material and methods Material: Tobacco (Nicoticana tabacum L). Methods: Cultivating and measuring methods were according to reference. 2 Results Results of this study indicate that the common effect of Pb, Hg and Cd on activity of CAT is obvi-展开更多
The continuous enrichment of heavy metals in soils has caused potential harm to groundwater.Quantitative methods to evaluate the harm of heavy metals in soil to groundwater are lacked in previous studies.Based on the ...The continuous enrichment of heavy metals in soils has caused potential harm to groundwater.Quantitative methods to evaluate the harm of heavy metals in soil to groundwater are lacked in previous studies.Based on the theory of groundwater circulation and solid-liquid equilibrium,a simple and easy-touse flux model of soil heavy metals migrating to groundwater is constructed.Based on groundwater environmental capacity,an innovative method for evaluating the harm of heavy metals in soil to groundwater is proposed,which has been applied in Hunchun Basin,Jilin Province,China.The results show that the fluxes of soil heavy metals into groundwater in the study area are Zn,Cu,As,Pb,Cd,Ni,and Hg in descending order.The content of heavy metals in groundwater(As,Hg,Cu,Pb,Zn,Ni,and Cd)in most areas has not risen to the threshold of environmental capacity within 10 years.The harm levels of soil heavy metals to groundwater in the most townships soils are at the moderate level or below.This evaluation method can quantify the flux of soil heavy metals into groundwater simply and quickly,determine the residual capacity of groundwater to heavy metals,evaluate the harm level of soil heavy metals to groundwater,provide support for relevant departments to carry out environmental protection of soil and groundwater,and provide a reference to carry out similar studies for related scholars.展开更多
[ Objective] The study was to investigate residual regularity in tissues of layer after combined exposure to lead （Pb） and/or cadmium （ Cd ）. [ Method] I.aad acetate （100 mg/L） and/or cadmium chloride （50 mg/L...[ Objective] The study was to investigate residual regularity in tissues of layer after combined exposure to lead （Pb） and/or cadmium （ Cd ）. [ Method] I.aad acetate （100 mg/L） and/or cadmium chloride （50 mg/L） were administered in drinking water to 120 individuals of 40 -week -old hyline layers for 8 weeks. [ Result] Compared with the Cd group, the Cd content in various tissues, except kidney and femur, in Cd ＋ Pb group all increased, but the difference was not significant （P 〉 0.05 ）. The Cd contents in kidney and femur in Cd group were significantly higher than that in Cd ＋ Pb group. Compared with the group Pb, the Pb contents in breast muscle and kidney in Cd ＋ Pb group decreased significantly （ P 〈 0.05 ） ; the Pb contents in femur decreased extremely （ P 〈 0.01 ） ; while the Pb contents in leg muscle, heart and spleen increased significantly （ P 〈 0.05 ） ; the Pb contents in liver and glandular stomach were almost the same. Compared with the control group, the Cd content in various tissues in Pb group increased significantly （ P 〈 0.05 ） ; no significant changes were observed for Pb content in Cd group. [ Conclusion] Deposit of Pb and Cd in poultry body had complex interaction.展开更多
文摘Pb, Hg and Cd will affect human health by vegetative chain. In recent years, people more and more are concerned about heavy metal pollution of the soil-plant system. Many researchers studied the effect of single heavy metal on growth, photosynthesis, respiration and quality of plants, but few systematicstudies of the effect of heavy metals on the scavenging system of activated oxygen of plants. This note systematically studies the effect of Pb, Hg and Cd in soil on the scavenging system of activated oxygen in tobacco leaves. 1 Material and methods Material: Tobacco (Nicoticana tabacum L). Methods: Cultivating and measuring methods were according to reference. 2 Results Results of this study indicate that the common effect of Pb, Hg and Cd on activity of CAT is obvi-
基金supported by the project of China Geology Survey(12120115032801,DD20190340)。
文摘The continuous enrichment of heavy metals in soils has caused potential harm to groundwater.Quantitative methods to evaluate the harm of heavy metals in soil to groundwater are lacked in previous studies.Based on the theory of groundwater circulation and solid-liquid equilibrium,a simple and easy-touse flux model of soil heavy metals migrating to groundwater is constructed.Based on groundwater environmental capacity,an innovative method for evaluating the harm of heavy metals in soil to groundwater is proposed,which has been applied in Hunchun Basin,Jilin Province,China.The results show that the fluxes of soil heavy metals into groundwater in the study area are Zn,Cu,As,Pb,Cd,Ni,and Hg in descending order.The content of heavy metals in groundwater(As,Hg,Cu,Pb,Zn,Ni,and Cd)in most areas has not risen to the threshold of environmental capacity within 10 years.The harm levels of soil heavy metals to groundwater in the most townships soils are at the moderate level or below.This evaluation method can quantify the flux of soil heavy metals into groundwater simply and quickly,determine the residual capacity of groundwater to heavy metals,evaluate the harm level of soil heavy metals to groundwater,provide support for relevant departments to carry out environmental protection of soil and groundwater,and provide a reference to carry out similar studies for related scholars.
基金National Quality Safety Risk Assessment of Agricultural Products Program(GJFP2016007)Research Fund for the Doctoral Program of Jiangsu Institute of Poultry Science(JQ201201)+2 种基金Yangzhou Prospective Study of Agriculture Fund(yz2014145)Jiangsu Sanxin Agriculture Engineering(SXGC[2016]292,SXGC[2015]298)General Program of Natural Science Foundation of Jiangsu Province(BK20131235)
文摘[ Objective] The study was to investigate residual regularity in tissues of layer after combined exposure to lead （Pb） and/or cadmium （ Cd ）. [ Method] I.aad acetate （100 mg/L） and/or cadmium chloride （50 mg/L） were administered in drinking water to 120 individuals of 40 -week -old hyline layers for 8 weeks. [ Result] Compared with the Cd group, the Cd content in various tissues, except kidney and femur, in Cd ＋ Pb group all increased, but the difference was not significant （P 〉 0.05 ）. The Cd contents in kidney and femur in Cd group were significantly higher than that in Cd ＋ Pb group. Compared with the group Pb, the Pb contents in breast muscle and kidney in Cd ＋ Pb group decreased significantly （ P 〈 0.05 ） ; the Pb contents in femur decreased extremely （ P 〈 0.01 ） ; while the Pb contents in leg muscle, heart and spleen increased significantly （ P 〈 0.05 ） ; the Pb contents in liver and glandular stomach were almost the same. Compared with the control group, the Cd content in various tissues in Pb group increased significantly （ P 〈 0.05 ） ; no significant changes were observed for Pb content in Cd group. [ Conclusion] Deposit of Pb and Cd in poultry body had complex interaction.
