Synthesis of Graft Copolymer of Starch-Acrylamid-Propylene Hydroxamic Acid and Capability of Trapping Pb2+

In this paper, graft copolymer of starch-acrylamid-propylene hydroxamic acid was synthesized by inverse emulsion polymerization. Effects of the dosage of the graft copolymer, pH value and reaction time on the capability of trapping heavy metal ion Pb2+ were investigated. The results showed that the optimum conditions for treating lead-containing wastewater were: pH=7-9, reaction time≧30min , the dosage of polymeric ferric sulfate and graft copolymer in wastewater were 10mg·L-1 and 250-300mg·L-1, respectively. The Pb2+ removal rate is not less than 99.8% and meanwhile the copolymer possess good removal performance of turbidity.

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Study of Cadmium Wastewater Treatment with Polymer PHA Containing Hydroxamic Acid Groups

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.610-613.1686 ◽

2012 ◽

Vol 610-613 ◽

pp. 1686-1690

Author(s):

Bi Wang

Keyword(s):

Heavy Metal ◽

Wastewater Treatment ◽

Reaction Time ◽

Hydroxamic Acid ◽

Ph Value ◽

Removal Rate ◽

Chelating Agent ◽

Environmental Safety ◽

Metal Chelating ◽

Made In

Polymer heavy metal chelating agent containing hydroxamic acid groups (PHA) was made in order to observe its effects on the removal rate of Cd2+. The present study reaches the following results: (1) On conditions that pH value is 8.0, the chelating agent is 60mg•L-1and the reaction time is 60min, the highest chelating capacity of the polymer heavy metal chelating agent PHA can reach 341 mg/g. (2) The existence of common cations: K+, Na+and Mg2+can improve PHA’s ability to remove Cd2+. (3) The existence of common anions Cl-, SO42-and NO3-can improve PHA’s ability to remove Cd2+. (4) Co-existing with the turbidity-causing materials, PHA’s removal abilities of Cd2+and turbidity are mutually promotive. (5) The chelating product, Cd-PHA’s amount of leaching of Cd2+is only 1/11 of that in neutralization titration ,having a relatively higher stability and better environmental safety.

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Study on Treatment of M-Cresol Wastewater Using Potassium Ferrate(VI)

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.610-613.2367 ◽

2012 ◽

Vol 610-613 ◽

pp. 2367-2371 ◽

Cited By ~ 1

Author(s):

Ming Zhong Hu ◽

Zhen He Shi ◽

Hong Yan Zhao

Keyword(s):

Reaction Time ◽

Ph Value ◽

Removal Rate ◽

Cod Removal ◽

Potassium Ferrate ◽

Optimum Conditions ◽

Initial Concentration ◽

Cod Removal Rate

The effects of the oxidation of potassium ferrate and the flocculation on cresol wastewater water were evaluated. This research aimed at determining the optimum conditions for the COD removal rate duing cresol wastewater water process. The results showed that potassium ferrate dosage of 1.1g/L, the pH value of 5, reaction time 15min, m-cresol initial concentration of 200 mg/L were the optimum conditions. Under the optimum conditions, COD removal rate was over 67%.

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OPTIMISATION OF AN ELECTROCHEMICAL SENSOR BASED ON BARE GOLD ELECTRODE FOR DETECTION OF ALUMINIUM ION

Borneo International Journal of Biotechnology (BIJB) ◽

10.51200/bijb.vi.2203 ◽

2020 ◽

pp. 103

Author(s):

Gilbert Ringgit ◽

Shafiquzzaman Siddiquee ◽

Suryani Saallah ◽

Mohammad Tamrin Mohamad Lal

Keyword(s):

Heavy Metal ◽

Metal Ion ◽

Gold Electrode ◽

Heavy Metal Ion ◽

Optimum Conditions ◽

Accumulation Time ◽

Aluminium Ion ◽

Scan Rate ◽

Bare Gold Electrode ◽

Bare Gold

In this work, an electrochemical method for detection of trace amount of aluminium (Al3+), a heavy metal ion, based on a bare gold electrode (AuE) was developed. Current responses of the AuE under various type of electrolytes, redox indicators, pH, scan rate and accumulation time were investigated using cyclic voltammetry (CV) method to obtain the optimum conditions for Al3+ detection. The sensing properties of the AuE towards the target ion with different concentrations were investigated using differential pulse voltammetry (DPV) method. From the CV results, the optimalconditions for the detection of Al3+ were Tris-HCl buffer (0.1 M, pH 2) supported by 5 mM Prussian blue with scan rate and accumulation time respectively of 100 mVs−1 and 15 s. Under the optimum conditions, the DPV method was detected with different concentrations of aluminium ion ranging from 0.2 to 1.0 ppm resulted in a good linear regression r² = 0.9806. This result suggests that the optimisation of the basic parameters in electrochemical detection using AuE is crucial before further modification of the Au-electrode to improve the sensitivity and selectivity especially for the low concentration of ion detection. The developed method has a great potential for rapid detection of heavy metal ion (Al3+) in drinking water samples.

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Heavy Metal Ion Adsorption Properties of Methacrylamidocysteine-Containing Porous Poly(Hydroxyethyl Methacrylate) Chelating Beads

Adsorption Science & Technology ◽

10.1260/02636170260504305 ◽

2002 ◽

Vol 20 (7) ◽

pp. 607-617 ◽

Cited By ~ 15

Author(s):

Adil Denizli ◽

Bora Garipcan ◽

Sibel Emir ◽

Süleyman Patir ◽

Ridvan Say

Keyword(s):

Heavy Metal ◽

Metal Ions ◽

Metal Ion ◽

Heavy Metal Ions ◽

Metal Removal ◽

Ph Value ◽

Heavy Metal Removal ◽

Ion Concentration ◽

Heavy Metal Ion ◽

Adsorption Capacities

Details of the adsorption performance of poly(2-hydroxyethylmethacrylate–methacrylamidocysteine) [p(HEMA–MAC)] beads towards the removal of heavy metal ions from aqueous solution were studied. The metal-complexing ligand and/or co-monomer MAC was newly synthesized from methylacrylochloride and cysteine. Spherical beads of average size 150–200 mm were obtained by the radical suspension polymerization of MAC and HEMA conducted in an aqueous dispersion. The p(HEMA–MAC) beads obtained had a specific surface area of 18.9 m2/g. p(HEMA–MAC) beads were characterized by swelling studies, FT-IR spectroscopy and elemental analysis. Such beads with a swelling ratio of 72%, and containing 3.9 mmol MAC/g, were used for heavy metal removal studies. The adsorption capacities of the beads for selected metal ions, i.e. CdII, AsIII, CrIII, HgII and PbII, were investigated in aqueous media containing different amounts of these ions (10–750 mg/l) and at different pH values (3.0–7.0). The adsorption rate was fast in all cases. The maximum adsorption capacities of the p(HEMA–MAC) beads were 1058.2 mg/g for CdII, 123.4 mg/g for AsIII, 199.6 mg/g for CrIII, 639.1 mg/g for PbII and 1018.6 mg/g for HgII. On a molar basis, the following affinity order was observed: CdII > HgII > CrIII > PbII >AsIII. The adsorption capacity of the MAC-incorporated beads was affected significantly by the pH value of the aqueous medium. The adsorption of heavy metal ions from artificial wastewater was also studied. In this case, the adsorption capacities were 52.2 mg/g for CdII, 23.1 mg/g for CrIII, 83.4 mg/g for HgII, 62.6 mg/g for PbII and 11.1 mg/g for AsIII at an initial metal ion concentration of 0.5 mmol/l. The chelating beads could be regenerated easily with a higher effectiveness by 0.1 M HNO3. These features make p(HEMA–MAC) beads potential candidates for heavy metal ion removal at high capacity.

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Synthesis of a poly(amidoxime-hydroxamic acid) cellulose derivative and its application in heavy metal ion removal

RSC Advances ◽

10.1039/c7ra03365f ◽

2017 ◽

Vol 7 (44) ◽

pp. 27787-27795 ◽

Cited By ~ 9

Author(s):

Chenlu Jiao ◽

Zhaofa Zhang ◽

Jin Tao ◽

Desuo Zhang ◽

Yuyue Chen ◽

...

Keyword(s):

Heavy Metal ◽

Metal Ion ◽

Hydroxamic Acid ◽

Cellulose Derivative ◽

Heavy Metal Ion ◽

Metal Ion Removal ◽

Ion Removal ◽

Heavy Metal Ion Removal

A new poly(amidoxime-hydroxamic acid) chelating cellulosic adsorbent was synthesized through grafting only one monomer, followed by the oximation reaction.

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Decolorization of Mordant Red 15 Dye in Water by Potassium Ferrate (VI)

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.838-841.2445 ◽

2013 ◽

Vol 838-841 ◽

pp. 2445-2448 ◽

Cited By ~ 2

Author(s):

Zheng Hua Wang ◽

Bo Zhi Ren ◽

Pu Wang

Keyword(s):

Reaction Time ◽

Fenton Reaction ◽

Ph Value ◽

Removal Rate ◽

Dye Decolorization ◽

High Ability ◽

Potassium Ferrate ◽

Optimum Conditions ◽

Ph Values ◽

Optimum Ph

Decolorization of the Mordant red 15 dye in water was investigated in laboratory-scale experiments using potassium ferrate (VI). The effect of corresponding parameters such as reaction time, concentration of potassium ferrate, pH values and the addition of H2O2 were considered in the experiments. The results indicated that about 78% dye decolorization was obtained in less than 30 min under optimum conditions. The pH values and concentration of ferrate (VI) were correlated with color removal rate of Mordant red 15 dye. The optimum pH value and ferrate (VI) concentration are 5 and 450 mg/L, respectively. Addition of H2O2 could initiate the Fenton reaction and result in 84.46% decolorization of dye in 30 min. Due to high ability of oxidizing and flocculation, potassium ferrate (VI) is an effect way for treatment of dyes in water.

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