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| 1 | Physico-chemical characteristics and heavy metal concentrations of copper mine wastes in Zambia:implications for pollution risk and restoration显示文摘Soil characterization is a vital activity to develop appropriate and effective restoration protocols for mine wastelands while insights into the total content of heavy metals in the soil is an important step in estimating the hazards that the metals may pose to the vital roles of soil in the ecosystem.This study addressed the following research questions:(1)To what extent do the physico-chemical characteristics vary between mine waste sediments and the nearby forest soil?(2)Are the concentrations of heavy metals high enough to be considered as toxic?and(3)Are heavy metals present in mine waste sediments potential sources of pollution?We hypothesized that the physicochemical characteristics of mine waste sediments are less favorably for plant establishment and growth while the concentrations of heavy metals are very high,thus restricting the success of revegetation of mine waste lands.Mine waste sediments were sampled following a diagonal transect across tailings dams,overburden dump sites and the local forest soil from the top layer(0-20 cm)using a closed auger.Samples were analyzed for arsenic,barium,lead,cadmium,cobalt,copper,chromium,nickel,vanadium,and zinc as well as for soil physico-chemical properties.The mine waste sediments were dominated by silt whilst the forest soil by sand particles,with significantly high bulk density in the former.Both the forest soil and overburden sediments were acidic than the alkaline tailings dam sediment.Total organic carbon and nitrogen contents were significantly low in mine wasteland substrates but the concentration of Ca and Mg were significantly higher in tailings dam substrate than the forest soil.The concentrations of available P,K and Na were similar across sites.The mean concentrations of heavy metals were significantly(p<0.01)higher in mine waste sediments than the forest soil;except for cadmium(p=0.213).The order of contamination by heavy metals on the tailings was Cu>Co>Ba>Ni>As>Zn>Pb>Cr>V>Cd,and that on the overburdens was Cu>Co>Ba>Ni>Zn>Cr>Pb>V>As>Cd.The pollution load index(PLI)was nearly twice higher for the tailings dam(8.97)than the overburden(5.84).The findings show that the copper mine wastes(the tailings dams and overburden waste rock sites)are highly contaminated by heavy metals;which,in turn,might pose serious hazards to human health and agricultural productivity.In addition,poor macro-nutrient availability,substrate compaction and soil acidity(particularly on overburden sites)coupled with toxic level of heavy metals would be the main challenges for successful phytostabilization of copper mine wastelands. | Mutale N.Chileshe Stephen Syampungani Emma Sandell Festin Mulualem Tigabu Abolfazl Daneshvar Per Christer Odén | 2020 | Journal of Forestry Research2020，31，4： | 2 |
| 2 | Kinetic modeling of photocatalytic degradation of acid red 27 in UV/TiO2 process显示文摘 | Daneshvar N Rabbani M Modirshahla N | 2004 | J Photochem Photobio A:Chem2004，168，1： | 1 |
| 3 | Photocatalyticdegradation of the herbicide erioglaucine in the presence ofnanosized titanium dioxide : Comparision and modeling ofreaction kinetics 显示文摘 | Daneshvar N Salari D Niaei A | 2006 | Journal of Environmental Science andHealth Part b-Pesticides Food Contaminants andAgricultural Wastes2006，41，8： | 1 |
| 4 | Flotation techniques to improve viability of Juniperus polycarpos seed lots显示文摘The germination of freshly collected Juniperus polycarpos(K. Koch) seeds is very low and attributed to the large proportion of nonviable seeds in the seed lots.Thus, the aim of this study was to improve seed lot quality by removing nonviable seeds using two flotation techniques: incubation-drying-separation(IDS) and modified specific gravity(MSG) separation. We examined different IDS conditions(the specific incubation time, subsequent drying time and sorting media) for effectively sorting out nonviable seeds; and tested the feasibility of modified SG separation, which involved soaking seeds in water for a certain period before sorting in different concentrations of sucrose solution. Viable seeds were expected to absorb and metabolically bind more water during soaking than dead seeds could, and hence be sorted effectively depending on the viscosity of the sucrose solution. The viability of the seeds that floated or sank was determined in a topographical tetrazolium chloride(TTC) test. For the IDS trial,7 days incubation followed by 9 h of drying and sedimentation in pure water or 200 g L-1sucrose solution identified, respectively, 75 and 82 % of the seeds as viable(sunken) seeds. For the MSG trail, 77 % viable seeds were recovered in the sunken fraction when seeds were soaked for 48 h then immediately sorted in 600 g L-1sucrose solution. In both cases, the loss of viable seeds in the discarded floating fraction was only 4 %. The results demonstrate that both IDS and MSG separation techniques substantially improved seed lot viability, but MSG separation is simple and needs no modern seed handling facility, and its efficacy relies on seed mass(due to the initial soaking) and the specific density and viscosity of the flotation medium. | Abolfazl Daneshvar Mulualem Tigabu Asaddollah Karimidoost Per Christer Odén | 2017 | Journal of Forestry Research2017，28，2： | 1 |
| 5 | Chromium adsorption and Cr( Ⅵ ) reduction to trivalent chromium in aqueous solutions by soya cake 显示文摘 | Daneshvar N Salari D Aber S | 2002 | Journal of Hazardous Materials2002，94，1： | 1 |
| 6 | Decreased expression of toll like receptor signaling molecules in chronic HBV infected patients显示文摘 | Momeni M Zainodini N Bidaki R Hassanshahi G Daneshvar H Khaleghinia M Ebrahim M KarimiGoogheri M Askari A Arababadi M K Kennedy D | 2014 | Hum Immunol2014，75，1： | 1 |
| 7 | Photocatalytic degradation of aze dye acid red 14 in water on ZnO as an alternative catalyst to TiO2显示文摘 | Daneshvar N Salari D Khataee A R | 2004 | J Phtochem Photobiol A2004，162，23： | 1 |
| 8 | Decolorization of dye solution containing Acid Red 14 by electrocoagulation with a comparative investigation of different electrode connections显示文摘 | DANESHVAR N SORKHABI H A KASIRI M B | 2004 | J Hazard Materi2004，112，： | 1 |
| 9 | Kinetic Modeling of Photocatalytic Degradation of Acid Red 27 in UV/TiO2 Process显示文摘 | Daneshvar N Rabbani M Modirshahla N | 2004 | J Photoch Photobio A2004，168，： | 1 |
| 10 | Kinetic Modeling of Photocatalytic Degradation of Acid Red 27 in UV/TiO2 Process显示文摘 | Daneshvar N Rabbani M Modirshahla N | | 0，，： | 1 |
| 11 | Photocatalytic degradation of aze dye acid red 14 in water on ZnO as an alternative catalyst to TiO2显示文摘 | Daneshvar N Salari D Khataee A R | 2004 | J Phtochem Photobiol A2004，162，23： | 1 |
| 12 | Photocatalytic degradation of aze dye acid red 14 in water on ZnO as an alternative catalyst to TiO2 显示文摘 | Daneshvar N Salari D Khataee A | 2004 | J Phtochem Photobiol A2004，162，23： | 1 |
| 13 | Decolorization of Orange Ⅱ by Electrocoagulation Method 显示文摘 | Daneshvar N Ashassi - Serkhabi H Tizpar A | 2003 | Separation and Purification Technology2003，31，： | 1 |
| 14 | Decolorization of dye solution containing acid red by electroeoagulation with a comparative investigation of different electrode connections 显示文摘 | Daneshvar N Sorkhabi H A Kasiri M B | 2004 | Journal of Hazardous Materials2004，11，2： | 1 |
| 15 | Decolorization of dye solution containing Acid Red 14 by electrocoagulation with a comparative investigation of different electrode connections显示文摘 | Daneshvar N Ashassi S H Kasiri M B | 2004 | Journal of Hazardous Materials B2004，，112： | 1 |
| 16 | Photocatalytic degradation of azo dye acid red 14 in water: investigation of the effect ofoperational parameters 显示文摘 | DANESHVAR N SALARI D KHATAEE A R | 2003 | Journal of Photochemistry & Photobiology A Chemistry2003，，1： | 1 |
| 17 | 显示文摘 | Daneshvar N Rasoulifard M H Khataee A R | 2007 | Journal of Hazardous Materials2007，143，： | 1 |
| 18 | Deeolorization of Dye Solution Containing Acid Red 14 by Electrocoagulation with a Comparative Investigation of Different Electrode Connections 显示文摘 | Daneshvar N | 2004 | Journal of Hazardous Materials2004，112，： | 1 |
| 19 | Photoeatalytic degradation of the insecticide diazinon in the presence of prepared nanocrystalline ZnO powders under irradiation of UV-C light显示文摘 | Daneshvar N Aber S Seyed Dorraji M S | 2007 | Sep Purif Techn2007，58，1： | 1 |
| 20 | Decolorization of orange Ⅱ by electrocoagulation method 显示文摘 | Daneshvar N Sorkhabi H A Tizpar A | 2003 | Separation and Purification Technology2003，31，2： | 1 |
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