Effect Of Lake Sediment Modification On The Growth Of Reineckia Carnea Based On Mine Reclamation

In this study,the modified Daye lake dredging sediment was used to study the methods of mine restoration.The impact of modified sediment on the growth of Reineckia carnea was studied by pot experiment.The Reineckia carnea was planted in sediment added iron ore backfilling,peat soil,sediment,vermiculite,calcium sulfate,phosphate rock powder,plant powder and pulverized fuel ash,respectively.Exploration under the action of the different modifier,auspicious Reineckia carnea,nutrient content and the degree of enrichment of heavy metals and sediment nutrient and heavy metal content changes before and after planting,preliminary finding suitable for Reineckia carnea growth and improve the nutrient content in the sediment of heavy metals and the ability to remove sediment improver and its proportion.Daye lake dredging sediment modification for the next step is used to provide a basis for the further study of the mine reclamation.The main research conclusions of this article are as follows:(1)Analysis of net growth,nutrient and heavy metal contents of Reineckia carnea: In the net growth of Reineckia carnea,20% and 30% tailings,3% calcium sulfate,5% and 10% peat,phosphate powder,10% vermiculite,2% and 5% plant dust can promote the growth of Reineckia carnea,20% tailings and 2% plant dust is best;The addition of 10% and 15% of peat earth can improve the absorption of nitrogen,phosphorus and potassium by the Reineckia carnea.5% and 8%plant powder added to improve the absorption of phosphorus,potassium,and magnesium.The phosphate powder can increase the absorption of phosphorus by the Reineckia carnea,and the more you add,the better the absorption.2% phosphate powder and1%calcium sulphate increases the absorption of calcium in Reineckia carnea.The addition of tailsand can improve the absorption of magnesium,which is best when adding 30%.In the rich set of heavy metals,10% of peat soil and 2% of phosphate powder can improve theabsorption of the total copper and the total arsenic.2%plant powder can increase the absorption of total zinc and total cadmium by the Reineckia carnea.Plant powder and tail sand can improve the absorption of the total zinc by Reineckia carnea.Calcium sulfate can improve the absorption of the total cadmium by the Reineckia carnea.(2)Analysis of nutrient and heavy metal contents of sediment:seven modifier can improve nutrient content in sediment of different level and reduce the heavy metal content in the sediment.5 percent and 8 percent of plant powder can significantly increase the content of total nitrogen,quick-acting nitrogen,total potassium,and instant potassium.Phosphate powder can significantly improve the total phosphorus and calcium content in the mud.10%of peat and 20% of dust ash can increase the amount of instant phosphorus;The tailsand can obviously increase the magnesium content of the base.Calcium sulphate and plant powder can significantly reduce the sediment in the pH of calcium sulphate is stronger than the effect of plant powder,and add the pH is smaller,the more amount of 15% of peat soil and 10%,20% vermiculite can significantly improve the sediment of pH,the three effects are the same.In the removal of heavy metals,vermiculite and tailings can clearly remove arsenic,zinc,copper,effective copper,and total copper in the mud.5% and 10% of peat soil can obviously eliminate total copper,total cadmium,total zinc,total arsenic;8 percent of phosphate powder can obviously remove the effective copper,total copper and total zinc in the bottom mud.5%and 20% of coal ash can obviously remove the effective copper,total copper,total zinc,total cadmium and total arsenic in the bottom mud.Calcium sulfate can obviously remove the effective copper,total cadmium,and arsenic in the mud.8 percent of plant powder can obviously remove the total zinc and total arsenic of the base.(3)Analysis of pH,organic matter and Reineckia carnea nutrients and heavy metals correlation of sediment : According to the sediment of pH,organic matter and Reineckia carnea nutrients and heavy metals correlation analysis: sediment of pH negatively correlated to the potassium contained in Reineckia carnea under section,the correlation coefficient is0.498;Sediment pH Reineckia carnea above ground and underground part of the cadmium content in negative correlation,correlation coefficient is 0.574,0.667,part of the arsenic is associated with the ground,the correlation coefficient of 0.475.Organic matter of sediment and Reineckia carnea land part and underground part of potassium content is positivecorrelation,the correlation coefficient is 0.710,0.474,and the Reineckia carnea magnesium content is negatively related to,the following parts of the correlation coefficient is 0.538.The content of pH and organic matter are not related to other nutrient and heavy metals content of Reineckia carnea.(4)To sum up,with Reineckia carnea growth as the main evaluation index,the enrichment of heavy metals by reference Reineckia carnea nutrient content and ability,the nutrient content and the reducing of the heavy metals in sediment effect comprehensive analysis,the primary modifier for plant powder,backfilling and peat soil,its ratio is: 5% of plant dust?10% of peat soil?30% of iron mine backfilling.