SU849984A3 - Method of heavy metal ion extraction from waste water - Google Patents

Description

The invention relates to wastewater treatment and can be used to extract heavy metal ions from wastewater.

A known method for the extraction of heavy metal ions from aqueous solutions by sorption on a porous mass obtained from a homogenized mixture of nitrohumic acid or its water-insoluble ¹ salt with a carboxyl group containing a binder polymer or its water-insoluble salt £ 1].

The disadvantage of this method is the relatively low kinetics of the sorption process and the absorption capacity of the sorbent.

The closest to the proposed technical essence and the achieved result is a method of extracting heavy metal ions by sorption on cellulose treated with ethyleneimino-N-acetic ether, ethyleneimino-N-propionic acid ester, ethyleneimino-I-ethylphosphonic ester 25 acids [ 2 J.

The disadvantage of this method is the relatively low kinetics of the process and the absorption capacity of the sorbent. So within 1 hour 30, 10% of mercury is adsorbed, 12 hours - 15%, .24 hours - 20%.

The purpose of the invention is to increase the degree of extraction.

The goal "is achieved by the fact that according to the method for the extraction of heavy metal ions from wastewater by sorption on cellulose treated with organic substances, sorption is carried out on cellulose treated first with the condensation product of polyethyleneamine or polyethyleneimine or their derivatives with haloacetic acid substituted in (Z- position with lower alkyl, carboxy lower alkyl or phenol and then treated with halogen triazine.

Example 1. 20 l of wastewater after dyeing cotton with a dye fixed by subsequent processing with copper, containing 45 ppm (mg / l) Cu ^2- * and also traces of a purple dye, with a pH of 3.5 are mixed with 20 g of sorbent - cellulose; treated with a condensation product of polyethyleneamine with an average molecular weight of 30000-40000, and monochloracetic acid, and then treated with cyanuric chloride (I). After 10 min stirring, after separation of the phases, a filtrate containing 1 ppm Cu ² t is obtained

Example 2.1 l of a solution with pH 3 containing'50 mg of Cu is stirred in a reactor with 4 g of treated cellulose sorbent. Stirring is carried out for 60 minutes After phase separation, the filtrate is analyzed for residual Cu ² t

Data on the residual concentration of Cu ²⁺ in the filtrate, depending on the sorbent used, are presented in table. 1.

Table 1

Used Residue sorbent (J naya horse centration, mg / l

Sorbent I 1.5

Cellulose treated with a condensation product of gulietylenimine with an average molecular weight of 3000040000 and sodium chloride of acetic acid, and then treated with cyanuric chloride (II) 0.2

Example 3. 1 l of a solution with pH 3 containing 50 mg of Nd is stirred in the reactor with 5 g of treated cellulosic 'sorbent for 6 0 min. After phase separation, the filtrate is analyzed for residual mercury.

Data on the residual concentration of mercury in the filtrate depending on the sorbent used are presented.

in table 2. Table and 2 Used sorbent Residual concentration, mg / l

Sorbent 'I 0.1

Sorbent II 0.1

Cellulose treated with a condensation product of polyethyleneimine with an average molecular weight of 30,000-40000 and monochlorosuccinic acid, and then with cyanuric chloride (IH) 0.9

Cellulose treated with a condensation product of polyethyleneimine. with an average molecular weight of 30000-40000 and crotonic acid, followed by 0.7 cyanuric chloride

PRI me R 4 .. 1 l of a solution with pH 3 containing 50 mg of Ad, stirred in the reactor with 5 g of treated cellulose sorbent for 60 minutes After phase separation, the filtrate is analyzed for residual silver content. *

Data on the residual concentration of silver in the filtrate depending on the sorbent used are presented

in table 3. Table and 3 Used Residue sorbent naya horse centration, mg / l -

Cellulose treated with a condensation product of polyethyleneamine with an average molecular weight of 30,000,000,000 and β-chloropropionic acid, and then with 0.1 cyanuric chloride

Cellulose treated with a condensation product of polyethyleneimine with an average molecular weight of 30000-40000 and sG-phenyl-p-bromoacetic acid, and then 0.1 cyanuric chloride

Sorbent III 0.1

Example 5.1 l of wastewater from the production of 2-hydroxyanthracene-3-carboxylic acid, which contains 310 ppm Ζη ' ¹⁺ π in the form of an ammonia complex, has a pH of 9.6, mixed with 3 g of treated cellulose sorbent I. After stirring for 60 minutes and the phase separation filtrate contains 6 ppm Ζη ^α *

Thus, the proposed method allows you to effectively remove heavy metal ions from solutions and is characterized by fast kinetics of the process.

Claims (3)

After separation of the phases, a filtrate containing 1 ppm is obtained. Example 2.1 l of a solution with a pH of 3 containing 50 mg of Cu is mixed in a reactor with 4 g of treated cellulose sorbent. Stirring is carried out for 60 minutes. After phase separation, the filtrate is analyzed for residual content. Data on the residual concentration of the filtrate, depending on the sorbent used, are presented in Table. 1. Table 1 Used Ostano sorbent on qi center, mg Sorbent I1.5 Cellulose, treated with polyethyleneimine condensation product with an average molecular weight of 3000040000 and sodium chloroacetic acid, and then treated with cyanuric chloride (II) 0.2 Ex. 1 l of a solution with a pH of 3 containing 50 mg Nd is stirred in a reactor with 5 g of the treated cellulosic sorbent for 60 minutes. After separation of the phases, the filtrate is analyzed for residual mercury content. Data on the residual concentration of mercury in the filtrate, depending on the sorbent used, are presented in Table. 2. Table Residue Sorbent used at concentration, mg / Sorbent I Sorbent II Cellulose treated with a condensation product of polyethyleneimine with an average molecular weight of 30000-40000 and mono-chloro succinic acid, and then cyanuric chloride (1H) Cellulose treated with a condensation product of polyethyleneimine. With an average molecular weight of 30,000–40000 and crotonic acid, and then cyanuric chloride PRI me R 4 .. 1 l of a solution with a pH of 3 containing 50 mg of Hell is stirred in a reactor with 5 g of treated cellulosic sorbent for 60 minutes. After phase separation, the filtrate is analyzed for residual cnpoi-, pa. Data on the residual concentration of silver in the filtrate, depending on the sorbent used, are presented in Table. 3. Table 3 Used Residant on concentration, mg / l. Cellulose treated with the condensation product of polyethylene amine with an average molecular weight of 3000040000 and p-chloropropionic acid, and then cyanuric chloride Cellulose treated with a polyethyleneimine condensation product with an average molecular weight of 30000-40000 and ot-phenyl-p-bromoacetic acid, and with a molecular weight of 30000-40000 and ot-phenyl-p-bromoacetic acid, and with a molecular weight of 30000-40000 and ot-phenyl-p-bromoacetic acid, and with a mean molecular weight of 30000-40000 and ot-phenyl-p-bromoacetic acid, and with a mean molecular weight of 30000-40000 and ot-phenyl-p-bromoacetic acid, and a cyanuric acid with a mean molecular weight of 30000-40000 and ot-phenyl-p-bromoacetic acid, and a cyanuric acid with a mean molecular weight of 30,000-40000 - Example 5.1l of waste water produced by 2-oxyanthracene-3-i ap6oic acid, which contains 310 ppm as an ammonia complex, has a pH of 9.6, is mixed with 3 g of treated cellulosic sorbent T. After stirring for 60 minutes and separating al filtrate contained 6 ppm Thus, the proposed method allows to efficiently remove heavy metal ions from solutions of fast kinetics and is characterized by the process. The invention of the method for extracting heavy metal ions from wastewater by sorption on cellulose treated with organic substances is also distinguished by the fact that, in order to increase the recovery rate, sorption is carried out on celePose treated first with a condensation product of polyethylene amine or polyethyleneimine or their 58499846 derivatives with halogenacetic. Sour Information Sources, the one substituted in the a-position with lower springs taken into account in the examination with alkyl, carboxy-lower alkkl 1. Patent SZNA No. 397p553, class 210-36 or phenyl, and then treated with H 01 O 15/00, C 02 B 1/52, 07.20.76 with halo triazine. Naturwiss, 50, 1963. p. 329.