Dithiocarbamate functionalized dendrimer with alkylenediamine core as soil heavy metal immobilization amendment and preparation method thereof

US9656311B2 · kind B2 · utility

Assignee

• TONGJI UNIVERSITY · CN

Inventors

• Bingru Zhang · Shanghai, CN
• Fengting Li · Shanghai, CN
• Huangpu Zhao · Shanghai, CN
• Weixiao Zhou · Shanghai, CN
• Haiyan Tian · Shanghai, CN

Key dates

• Filing date: Jun 12, 2015
• Grant date: May 23, 2017
• Expiry date: Jul 23, 2035

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B09C2101/00
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A dithiocarbamate functionalized dendrimer with an alkylenediamine core, a dithiocarbamate pendant functional group and a dithiocarbamate end functional group, as a soil heavy metal immobilization amendment, and a preparation method thereof are provided. The dithiocarbamate functionalized dendrimer has a chemical formula of (CH2)a{N[CH2CH2COOCH2C(C2H5)(CH2OCOCH2CH2N(CSSM)CH2(CH2)bCH2N(CSS M)2)2]2}2, wherein a is a positive integer larger than 2; b is a positive integer at a range of 0-4; and M is Na+, NH4+ or K+. The dithiocarbamate functionalized dendrimer with the alkylenediamine core is used for an in-suit immobilization remediation for soil contaminated by heavy metals, and has advantages of a small dosage, high efficiency, safety and rapidness. The dendrimer is able to effectively immobilize exchangeable and carbonated bound forms of the heavy metals, in such a manner that the immobilized heavy metals are able to resist an influence from natural environment for a long term, such as an acid rain.