Optimized preparation of dithiocarboxylated polyethyleneimine-polyacrylamide and its Cu(Ⅱ) removal performance and mechanism
Dithiocarboxylated polyethyleneimine-polyacrylamide〔DT(PEI-PAM)〕 was prepared by using polyacrylamide(PAM),sodium hydroxide(NaOH), sodium hypochlorite(NaClO), and carbon disulfide(CS2) as raw materials. The Cu(Ⅱ) removal in water samples by DT(PEI-PAM) was investigated as the target, and the optimal...
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Editorial Office of Industrial Water Treatment
2024-12-01
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| Series: | Gongye shui chuli |
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| Online Access: | https://www.iwt.cn/CN/10.19965/j.cnki.iwt.2023-1157 |
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| author | SANG Fangjuan WANG Gang WANG Xue YANG Xiaomin |
| author_facet | SANG Fangjuan WANG Gang WANG Xue YANG Xiaomin |
| author_sort | SANG Fangjuan |
| collection | DOAJ |
| description | Dithiocarboxylated polyethyleneimine-polyacrylamide〔DT(PEI-PAM)〕 was prepared by using polyacrylamide(PAM),sodium hydroxide(NaOH), sodium hypochlorite(NaClO), and carbon disulfide(CS2) as raw materials. The Cu(Ⅱ) removal in water samples by DT(PEI-PAM) was investigated as the target, and the optimal preparation conditions of DT(PEI-PAM) were determined by orthogonal experiments. The removal performance of DT(PEI-PAM) for Cu(Ⅱ) was investigated by using flocculation experiments, and the preparation mechanism and the removal mechanism for Cu(Ⅱ) with DT(PEI-PAM) were investigated by characterization means. The results showed that the intermediate polyethylenimide(PEI) was prepared under the optimal conditions as 1% of PAM concentration, 1:1:2 of n(PAM):n(NaClO):n(NaOH), 30 ℃ of reaction temperature, 120 min of reaction time, and 6.5 of pH in reaction medium. The final product DT(PEI-PAM) was prepared under the optimal conditions as 1:2:3 of reactant mass concentration ratio for PEI:CS2:NaOH, 25 ℃ of pre-reaction temperature, 40 min of pre-reaction time, 60 ℃ of main reaction temperature, and 120 min of main reaction time. The highest removal rate of Cu(Ⅱ) by DT(PEI-PAM) was 96.15% in water sample〔25 mg/L of Cu(Ⅱ) and pH 6.0〕. The infrared characterization and energy spectrum analysis showed that the dithiocarboxyl groups were successfully introduced in DT(PEI-PAM). The mechanism of DT(PEI-PAM) for Cu(Ⅱ) removal was mainly oxidation reduction and chelation precipitation, and the flocculation mechanism was mainly adsorption bridging and net sweep action. |
| format | Article |
| id | doaj-art-f5ea96beddfa488ca8fd2be0a1bdcf83 |
| institution | Kabale University |
| issn | 1005-829X |
| language | zho |
| publishDate | 2024-12-01 |
| publisher | Editorial Office of Industrial Water Treatment |
| record_format | Article |
| series | Gongye shui chuli |
| spelling | doaj-art-f5ea96beddfa488ca8fd2be0a1bdcf832025-01-14T02:07:07ZzhoEditorial Office of Industrial Water TreatmentGongye shui chuli1005-829X2024-12-014412677610.19965/j.cnki.iwt.2023-11571005-829X（2024）12-0067-10Optimized preparation of dithiocarboxylated polyethyleneimine-polyacrylamide and its Cu(Ⅱ) removal performance and mechanismSANG Fangjuan0WANG Gang1WANG Xue2YANG Xiaomin3School of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou730070, ChinaSchool of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou730070, ChinaSchool of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou730070, ChinaSchool of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou730070, ChinaDithiocarboxylated polyethyleneimine-polyacrylamide〔DT(PEI-PAM)〕 was prepared by using polyacrylamide(PAM),sodium hydroxide(NaOH), sodium hypochlorite(NaClO), and carbon disulfide(CS2) as raw materials. The Cu(Ⅱ) removal in water samples by DT(PEI-PAM) was investigated as the target, and the optimal preparation conditions of DT(PEI-PAM) were determined by orthogonal experiments. The removal performance of DT(PEI-PAM) for Cu(Ⅱ) was investigated by using flocculation experiments, and the preparation mechanism and the removal mechanism for Cu(Ⅱ) with DT(PEI-PAM) were investigated by characterization means. The results showed that the intermediate polyethylenimide(PEI) was prepared under the optimal conditions as 1% of PAM concentration, 1:1:2 of n(PAM):n(NaClO):n(NaOH), 30 ℃ of reaction temperature, 120 min of reaction time, and 6.5 of pH in reaction medium. The final product DT(PEI-PAM) was prepared under the optimal conditions as 1:2:3 of reactant mass concentration ratio for PEI:CS2:NaOH, 25 ℃ of pre-reaction temperature, 40 min of pre-reaction time, 60 ℃ of main reaction temperature, and 120 min of main reaction time. The highest removal rate of Cu(Ⅱ) by DT(PEI-PAM) was 96.15% in water sample〔25 mg/L of Cu(Ⅱ) and pH 6.0〕. The infrared characterization and energy spectrum analysis showed that the dithiocarboxyl groups were successfully introduced in DT(PEI-PAM). The mechanism of DT(PEI-PAM) for Cu(Ⅱ) removal was mainly oxidation reduction and chelation precipitation, and the flocculation mechanism was mainly adsorption bridging and net sweep action.https://www.iwt.cn/CN/10.19965/j.cnki.iwt.2023-1157polyacrylamidedithiocarboxyl groupscopper-containing wastewaterflocculation |
| spellingShingle | SANG Fangjuan WANG Gang WANG Xue YANG Xiaomin Optimized preparation of dithiocarboxylated polyethyleneimine-polyacrylamide and its Cu(Ⅱ) removal performance and mechanism Gongye shui chuli polyacrylamide dithiocarboxyl groups copper-containing wastewater flocculation |
| title | Optimized preparation of dithiocarboxylated polyethyleneimine-polyacrylamide and its Cu(Ⅱ) removal performance and mechanism |
| title_full | Optimized preparation of dithiocarboxylated polyethyleneimine-polyacrylamide and its Cu(Ⅱ) removal performance and mechanism |
| title_fullStr | Optimized preparation of dithiocarboxylated polyethyleneimine-polyacrylamide and its Cu(Ⅱ) removal performance and mechanism |
| title_full_unstemmed | Optimized preparation of dithiocarboxylated polyethyleneimine-polyacrylamide and its Cu(Ⅱ) removal performance and mechanism |
| title_short | Optimized preparation of dithiocarboxylated polyethyleneimine-polyacrylamide and its Cu(Ⅱ) removal performance and mechanism |
| title_sort | optimized preparation of dithiocarboxylated polyethyleneimine polyacrylamide and its cu ii removal performance and mechanism |
| topic | polyacrylamide dithiocarboxyl groups copper-containing wastewater flocculation |
| url | https://www.iwt.cn/CN/10.19965/j.cnki.iwt.2023-1157 |
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