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And yellow reaction between the soluble starch and acrylamide graft copolymer as the theoretical basis , a creative synthesis of the dithiocarbamate starch xanthate ( DSX ) and used for the adsorption of heavy metal ions from wastewater , main content and conclusions are as follows : instruments such as FTIR, H-NMR, (13) C -NMR, XRD, SEM and TG thiocarbamate synthesized starch xanthates DSX characterization results showed that the the thiocarbamate starch xanthan salt ( DSX ) was successfully prepared . Investigated the synthesis of cross-linking agent , triggering agent , acrylamide , and the amount of carbon disulfide and other factors , the synthetic products used in the treatment of heavy metal ions , the use of orthogonal experiment looking for heavy metal ion removal rate is relatively high DSX synthesis conditions , the results : crosslinking agent material than 10g ︰ 1.25 mL , the optimum conditions of the initiator material than is 10g ︰ 4ml acrylamide materials for ︰ 3ml 10g and carbon disulfide materials than is 10g ︰ 5ml . In addition, soluble starch and acrylonitrile graft copolymerization synthetic dithiocarbamate starch xanthates ( DSX - 1 ) and is copolymerizable with the acrylic acid graft the synthetic disulfide ester groups starch ( DTS ) . The effects of temperature, pH , ion concentration and dosage amount and other factors DSX applied to deal with the impact of the heavy metal ions from wastewater , uniform design experiments to find the optimum conditions of the treatment of heavy metal ions , experiments show that : a temperature of 40 ° C , pH value of 9 , the adsorption time is 50min, the ion concentration to 15 mg / L , the dosage to 0.2 g , the the Cu 2 < / sup > the the Pb 2 < / sup > CD 2 < / sup> and the Zn 2 < / sup > four kinds of metal ions highest removal rate were 98.5% , 98.3% , 97.8% and 97.5% , respectively . Langmuir and Freundlich isotherm equation and pseudo - first - order kinetics and second-order kinetics DSX adsorption the Cu 2 < / sup > the Pb 2 , Cd the 2 and Zn 2 of heavy metal ions adsorption process is described , the results show that : this adsorption is more in line with the Langmuir adsorption isotherm and a kinetic equation .
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