Polyacrylamide-urea-sulfanilamide（PUS） was prepared as a novel heavy metal ions chelator and successfully used to simultaneously remove heavy metals from wastewater effluents.The effects of reaction parameters（sodi...Polyacrylamide-urea-sulfanilamide（PUS） was prepared as a novel heavy metal ions chelator and successfully used to simultaneously remove heavy metals from wastewater effluents.The effects of reaction parameters（sodium hydroxide,material ratio,temprature and contact time） were monitored to specify the best synthesis conditions.PUS was chemically characterized by means of infrared spectroscopy（FTIR） and ultraviolet-visible（UV-Vis）.The simultaneous chelation performance of PUS towards selected heavy metals ions,Ni2＋,Cu2＋,Pb2＋,Zn2＋,Cd2＋ was discussed,showing that Ni2＋,Cu2＋,Pb2＋,Zn2＋ could be better chelated.It is indicated that the synthesized PUS is a potential remediation material when used for the treatment of wastewater containing metal ions.展开更多
The fly ash from two municipal solid waste incineration plants in Shanghai was treated by the self-developed organic composite chelating agent. The results indicated that the stabilization effect of Pb in the fly ash ...The fly ash from two municipal solid waste incineration plants in Shanghai was treated by the self-developed organic composite chelating agent. The results indicated that the stabilization effect of Pb in the fly ash by the composite chelating agent was the best,and the proportions of its easily leaching form in the two kinds of fly ash decreased from 29. 60% and 27. 49% to 3. 05% and 0. 29% respectively. The leaching toxicity of stabilized fly ash was lower than the limits of Standard for Pollution Control on the Landfill Site of Municipal Solid Waste（ GB 16889- 2008）,so it can be landfilled separately in the landfill site of municipal solid waste.展开更多
The graft copolymerization of acrylic acid（AA） onto polyethylene glycol terephthalate（PET） fiber initialed by benzoy peroxide （BPO） was carried out in heterogeneous media.Moreover,modification of the grafted PET...The graft copolymerization of acrylic acid（AA） onto polyethylene glycol terephthalate（PET） fiber initialed by benzoy peroxide （BPO） was carried out in heterogeneous media.Moreover,modification of the grafted PET fiber（PET-AA） was done by changing the carboxyl group into acylamino group through the reaction with dimethylamine.The modified chelating fiber（NDWJN1） was characterized using elementary analysis,SEM and FT-IR spectroscopy.Adsorption kinetic curves indicated that NDWJNl could fast remove heavy metal ions and phytic acids from water effectively.Furthermore,batch kinetic studies indicated that heavy metal ions adsorbed to NDWJNl could be filted well by both pseudo-first-order and pseudo-second-order adsorption equations,but the intra-particle diffusion played a dominant role in the adsorption of phytic acids.展开更多
基金Funded by the Cooperative Project of Yulin City,Shaanxi Province,201
文摘Polyacrylamide-urea-sulfanilamide（PUS） was prepared as a novel heavy metal ions chelator and successfully used to simultaneously remove heavy metals from wastewater effluents.The effects of reaction parameters（sodium hydroxide,material ratio,temprature and contact time） were monitored to specify the best synthesis conditions.PUS was chemically characterized by means of infrared spectroscopy（FTIR） and ultraviolet-visible（UV-Vis）.The simultaneous chelation performance of PUS towards selected heavy metals ions,Ni2＋,Cu2＋,Pb2＋,Zn2＋,Cd2＋ was discussed,showing that Ni2＋,Cu2＋,Pb2＋,Zn2＋ could be better chelated.It is indicated that the synthesized PUS is a potential remediation material when used for the treatment of wastewater containing metal ions.
基金Supported by the Project of Shangai State-owned Assets Supervision and Administration Commission(2013019)Project of Shanghai Science and Technology Commission(13231201901)+1 种基金Innovation Foundation of Shanghai Science and Technology Commission(11231200200)Special Project for Zhangjiang High-tech Park in Shanghai(201505-HP-C104-005)
文摘The fly ash from two municipal solid waste incineration plants in Shanghai was treated by the self-developed organic composite chelating agent. The results indicated that the stabilization effect of Pb in the fly ash by the composite chelating agent was the best,and the proportions of its easily leaching form in the two kinds of fly ash decreased from 29. 60% and 27. 49% to 3. 05% and 0. 29% respectively. The leaching toxicity of stabilized fly ash was lower than the limits of Standard for Pollution Control on the Landfill Site of Municipal Solid Waste（ GB 16889- 2008）,so it can be landfilled separately in the landfill site of municipal solid waste.
基金support provided by the Key National Nature Science Fund(No.50938004)the National Science Funds for Young Scientists(No.50102582)+1 种基金Nature Science Fund of Jiangsu Province(No. BK2010381)the Fundamental Research Funds for the Central Universities
文摘The graft copolymerization of acrylic acid（AA） onto polyethylene glycol terephthalate（PET） fiber initialed by benzoy peroxide （BPO） was carried out in heterogeneous media.Moreover,modification of the grafted PET fiber（PET-AA） was done by changing the carboxyl group into acylamino group through the reaction with dimethylamine.The modified chelating fiber（NDWJN1） was characterized using elementary analysis,SEM and FT-IR spectroscopy.Adsorption kinetic curves indicated that NDWJNl could fast remove heavy metal ions and phytic acids from water effectively.Furthermore,batch kinetic studies indicated that heavy metal ions adsorbed to NDWJNl could be filted well by both pseudo-first-order and pseudo-second-order adsorption equations,but the intra-particle diffusion played a dominant role in the adsorption of phytic acids.
