Comparative investigation of N,N′-bis-(dithiocarboxy)piperazine and diethyldithiocarbamate as precipitants for Ni(II) in simulated wastewater

Fu, Fenglian; Chen, Runming

doi:10.1016/j.jhazmat.2006.08.036

Cited by 39 publications

(18 citation statements)

References 24 publications

(27 reference statements)

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“…Small molecular precipitants are available in two forms: s o d i u m d i m e t h y l d i t h i o c a r b a m a t e a n d diethyldithiocarbamate (DDTC) (Andrus 2000;Matlock et al 2002a;Fu et al 2006a;Fu et al 2007b). DTC is added to the solution usually in a stoichiometric ratio, equal to precipitated metals.…”

Section: Precipitation Using Dithiocarbamate Compoundsmentioning

confidence: 99%

“…In addition, it was noted that during precipitation using DTC, insoluble metal complexes such as Cu(diethyldithiocarbamate) 2 may form (Fu et al 2006b). Diethyldithiocarbamate and dimethyldithiocarbamate have only one chelating group (Fu et al 2006a, Fu et al 2007b.…”

Section: Precipitation Using Dithiocarbamate Compoundsmentioning

confidence: 99%

“…The compound was synthesized by the reaction of piperazine with CS 2 and NaOH in dry ethyl ether and isopropyl alcohol under vigorous stirring over 5 h. The molar ratio used was as follows: piperazine:CS 2 :NaOH = 1:2:2. The raw product was recrystallized from an aqueous solution containing 50% methanol (Fu et al 2006a;Fu et al 2006b;Fu et al 2007b).…”

Section: Precipitation Using Dithiocarbamate Compoundsmentioning

confidence: 99%

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Removal of Heavy Metal Ions from Water and Wastewaters by Sulfur-Containing Precipitation Agents

Pohl

2020

Water Air Soil Pollut

272

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Restrictive requirements for maximum concentrations of metals introduced into the environment lead to search for effective methods of their removal. Chemical precipitation using hydroxides or sulfides is one of the most commonly used methods for removing metals from water and wastewater. The process is simple and inexpensive. However, during metal hydroxide precipitation, large amounts of solids are formed. As a result, metal hydroxide is getting amphoteric and it can go back into the solution. On the other hand, use of sulfides is characterized by lower solubility compared with that of metal hydroxides, so a higher degree of metal reduction can be achieved in a shorter time. Disadvantages of that process are very low solubility of metal sulfides, highly sensitive process to the dosing of the precipitation agent, and the risks of emission of toxic hydrogen sulfide. All these restrictions forced to search for new and effective precipitants. Potassium/sodium thiocarbonate (STC) and 2,4,6-trimercaptotiazine (TMT) are widely used. Dithiocarbamate (DTC) compounds are also used, e.g., sodium dimethyldithiocarbamate (SDTC), and ligands for permanent metal binding, e.g., 1,3-benzenediamidoethanethiol (BDETH2), 2,6-pyridinediamidoethanethiol (PyDET), a pyridine-based thiol ligand (DTPY) or ligands with open chains containing many sulfur atoms, using of a tetrahedral bonding arrangement around a central metal atom. The possibility of improving the efficiency of metal precipitation is obtained by using a higher dose of precipitating agent. However, toxic byproducts are often produced. It is required that the precipitation agents not only effectively remove metal ions from the solution but also effectively bind with dyes or metal complexes.

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Section: Precipitation Using Dithiocarbamate Compoundsmentioning

confidence: 99%

Section: Precipitation Using Dithiocarbamate Compoundsmentioning

confidence: 99%

Section: Precipitation Using Dithiocarbamate Compoundsmentioning

confidence: 99%

See 1 more Smart Citation

Removal of Heavy Metal Ions from Water and Wastewaters by Sulfur-Containing Precipitation Agents

Pohl

2020

Water Air Soil Pollut

272

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“…It was reported that dithiocarbamate (DTC), a heavy metal collector synthetized by diethylenetriamine and carbon disulfide, combined with its derivatives were adopted to remove chelate heavy metal ions from wastewater with the addition of a small quantity of polyacrylamide (PAM) as a flocculant. The concentration of Ni 2þ could be decreased from 50.00 mg/L to 0.87 mg/L by using N, N 0 -bis-(dithiocarboxy) piperazine (BDP) and diethyldithiocarbamate (DDTC) (Fu et al, 2007), and Cd 2þ , Cu 2þ and Zn 2þ in chelated states could be removed by another dithiocarbamate groups functionalized multi-walled carbon nanotube (DTC-MWCNT) (Li et al, 2015). However, existing chelating precipitation reagents are mainly designed for removing heavy metals but not for precious metals such as palladium.…”

Section: Introductionmentioning

confidence: 99%

Selective chelating precipitation of palladium metal from electroplating wastewater using chitosan and its derivative

Xie¹,

Liang

Lin

et al. 2020

Adsorption Science & Technology

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A study on selective chelating precipitation of palladium metal from real electroplating wastewater using chitosan and its water-soluble derivative was conducted. The pH parameter, the concentrations of chitosan and its water-soluble derivative and the chelating precipitation time were experimentally investigated, and the optimum conditions were determined. The results revealed that both chitosan and its water-soluble derivative acted as chelating precipitation agents. Rapid chelating precipitation occurred when chitosan was added to real electroplating wastewater containing the chitosan derivative, thereby improving removal efficiency of palladium in different forms up to 95% under the optimum condition of 0.2 g/L chitosan and 0.16 mg/L derivative at pH 2.5. Then, dissolution experiments showed that chelating precipitation products could be dissolved in aqua regia. Additionally, selective chelating precipitation of palladium by chitosan and its derivative was characterized using X-ray photoelectron spectroscopy and Fourier transform infrared spectroscopy. Thus, it can be concluded that the combined utilization of chitosan and its water-soluble derivative is a promising approach method for the removal of different forms of palladium from real electroplating wastewater.

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“…It could effectively precipitate copper to less than 0.5 mg/l from both synthetic and actual industrial wastewater containing Cu-EDTA in the range of pH 3−9. The group team also perform a coordination polymerization HMCA, N,N′-bis-(dithiocarboxy)piperazine to compared with a widely used HMCA diethyldithiocarbamate, through the treatment of three kinds of nickelcontaining wastewaters [11]. Fu's group indicated the promising future of dithiocarbamate-type HMCA.…”

Section: Introductionmentioning

confidence: 99%

Removal of micro complex copper in aqueous solution with a dithiocarbamate compound

Yang

et al. 2012

Desalination and Water Treatment

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Comparative investigation of N,N′-bis-(dithiocarboxy)piperazine and diethyldithiocarbamate as precipitants for Ni(II) in simulated wastewater

Cited by 39 publications

References 24 publications

Removal of Heavy Metal Ions from Water and Wastewaters by Sulfur-Containing Precipitation Agents

Removal of Heavy Metal Ions from Water and Wastewaters by Sulfur-Containing Precipitation Agents

Selective chelating precipitation of palladium metal from electroplating wastewater using chitosan and its derivative

Removal of micro complex copper in aqueous solution with a dithiocarbamate compound

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