Research On Advanced Treatment Of Non-ferrous Metal Mine Wastewater By Resin Adsorption Technology

In order to meet non-ferrous metal mining mine water emission standards（improving from integrated wastewater discharge Standard the first class to thesurface water standards Ⅲ class） requirements, research on advanced treatmenttechnology by resin material.Using D402resin material adsorbing a single containingwater samples of Pb （Ⅱ）1.160mg/L or Cd（Ⅱ）0.340mg/L respectively. In the pH=6.0,temperature298k condition, the flow velocity of16.8m/h by Ф=39mm （insidediameter） effective filling height h=450mm continuously feeding, resin adsorptioncolumn removal rate divided by98.63%and98.75%. The result corresponding tosingle cycle water production capacity of6000BV and2000BV, and the coexistenceof Pb （Ⅱ）, Cd （Ⅱ） hybrid adsorption water samples in the same condition, singlecycle comprehensive standard water production capacity of1900BV.Putting D201resin in acid saturated FeCl3solution adsorption, after NaOH solidcontact load, alcohol elution, heat treatment, the D201-Fe resin nano-compositematerial for arsenic adsorption treatment effect significantly improved class material,which has a99.98%adsorption rate to a samples contain As （Ⅲ）0.308mg/L, and thesingle cycle water production capacity is6300BV. Getting D402material adsorb Pb（Ⅱ）, Cd （Ⅱ） andD201-Fe adsorb As（Ⅲ）, the effect of main factors affecting theadsorption effect and the effective adsorption capacity was pH> residence time（velocity）> other interfering ions, Especially Mg²⁺, Ca²⁺, SO₄²⁺, Mg²⁺, Cl-and othercoexisting ions in natural water does very small effect to D402and D201-Fe.Saturated D402material adsorb Pb（Ⅱ）, Cd（Ⅱ）which after four cycles acid-alkalitwo-stage regeneration, the adsorption rate changed respectively to85.28%,93.83%of the original material, renewable liquid1:12HCl （v/v） and3%（w/v） NaOH; Thesaturated D201-Fe material regeneration by3%NaOH, the adsorption rate arerespectively92.97%,90.52%,92.97%and89.60%after four cycle the raw materialsbiggest adsorption amount.Using a capacity of200m³/h D402and D201-Fe two adsorption process in anonferrous mining mine water treatment project as an example to carry on theinvestment estimation, the project total investment is10.38million yuan; Operationcost is0.698yuan/m³; The recovery period of the project investment cost is about2 years, and it has high economic benefits, social benefits and environmental benefits.