scholarly journals Enhancement of Separation Efficiency for Nano Filtration Membrane using Water-Soluble Polymer.

2019 ◽  
Vol 8 (2) ◽  
pp. 1470-1474
Keyword(s):  
Heavy Metal ◽  
Flow Rate ◽  
Metal Ion ◽  
Separation Efficiency ◽  
Water Soluble ◽  
Ion Concentration ◽  
Heavy Metal Ion ◽  
Binding Agent ◽  
Water Soluble Polymer ◽  
Filtration Membrane

In this study, an aqueous solution containing a mixture of heavy metal ion Cr(III) were treated by polymer enhanced Nanofiltration using polyethylene glycol as a binding agent polymer. The performance of PEG in removing heavy metal ion Cr (III) was compared with PEG and without PEG addition using polyamide Nano filtrationmembrane. The percentage rejection of heavy metal ions was studied under the different value of pH, metal ion concentration and flow rate. AtpH 10,percentage rejection of heavy metal ion was highest at around 99.2%,whereas,at 200ppm concentration and at 3(l/hm2 )flow rate percentage rejection of heavy metal ion with PEG was highest 99.5%,it was found that PEG gave higher percentage rejection of Cr(III) ion than without the addition of PEG

scholarly journals Synthesis, Characterization of a New Polyacrylic Acid Superabsorbent, Some Heavy Metal Ion Sorption, the Adsorption Isotherms, and Quantum Chemical Investigation

Materials ◽  
2020 ◽  
Vol 13 (19) ◽  
pp. 4390
Author(s):  
Sevil Savaskan Yilmaz ◽  
Nuri Yildirim ◽  
Murat Misir ◽  
Yasin Misirlioglu ◽  
Emre Celik
Keyword(s):  
Heavy Metal ◽  
Quantum Chemical ◽  
Metal Ion ◽  
Molecular Mechanic ◽  
Ion Concentration ◽  
Heavy Metal Ion ◽  
Competitive Sorption ◽  
Cross Linker ◽  
The Cross

Poly(acrylic acid/Kryptofix 23-Dimethacrylate) superabsorbent polymer [P (AA/Kry23-DM) SAP] was synthesized by solution polymerization to remove Co, Ni, Cu, Cd, Mn, Zn, Pb, Cr, and Fe ions in water and improve the quality of the water. Kry23-DM cross-linker (1,4,7,13,16-Pentaoxa-10,19 diazo cyclohexene icosane di methacrylate) was synthesized using Kry23 and methacryloyl chloride. The characterization of the molecules was done by FTIR, TGA, DSC, and SEM techniques. The effects of parameters such as pH, concentration, and the metal ion interaction on the heavy metal ions uptaking of SAP was investigated. It was observed that P (AA/Kry23-DM) SAP has maximum water absorption, and the absorption increases with the pH increase. Adsorption rates and sorption capacity, desorption ratios, competitive sorption (qcs), and distribution coefficient (log D) of P(AA/Kry23-DM) SAP were studied as a function of time and pH with the heavy metal ion concentration. Langmuir and Freundlich isotherms of the P (AA/Kry23-DM) SAP were investigated to verify the metal uptake. Molecular mechanic (MM2), Assisted Model Building with Energy Refinement (AMBER), and optimized potentials for liquid simulations (OPLS) methods. were used in quantum chemical calculations for the conformational analysis of the cross-linker and the SAP. ΔH0f calculations of the cross-linker and the superabsorbent were made using Austin Model 1(AM1) method.

Heavy metal adsorption changes of EAF steel slag after phosphorus adsorption

2012 ◽  
Vol 65 (9) ◽  
pp. 1570-1576 ◽  
Author(s):  
Guanling Song ◽  
Lijing Cao ◽  
Xiao Chen ◽  
Wenhua Hou ◽  
Qunhui Wang
Keyword(s):  
Heavy Metal ◽  
Metal Ion ◽  
Steel Slag ◽  
Ion Concentration ◽  
Metal Adsorption ◽  
Heavy Metal Ion ◽  
Heavy Metal Adsorption ◽  
Isothermal Adsorption ◽  
Phosphorus Adsorption ◽  
Cadmium And Lead

A kind of electric arc furnace (EAF) steel slag was phosphated, and its isothermal and dynamic adsorptions of copper, cadmium, and lead ions were measured to determine if heavy metal adsorption changes after phosphorus adsorption. The surface area increased greatly after the slag was phosphated. Isothermal adsorption experiments showed that the theoretical Qmax of the EAF steel slag on Cu2+, Cd2+, and Pb2+ improved 59, 50, and 89% respectively after it was phosphated. Dynamic adsorption results showed that the greatest adsorption capacities of unit volume of Cu2+, Cd2+, and Pb2+ were 2.2, 1.8, and 1.8 times that of the column packed with original EAF steel slag when the column was packed with phosphate EAF steel slag at the same heavy metal ion concentration. The breakthrough time, the exhaustion time and elution efficiency of the column also increased when the column was packed with phosphated EAF steel slag compared with that packed with original EAF steel slag. Phosphorus adsorption could further improve the heavy metal ion adsorption of the EAF steel slag.

scholarly journals System Control Scheme and Design Idea of Soft Sensing Model for Heavy Metal Ion Concentration

2021 ◽  
Vol 2033 (1) ◽  
pp. 012193
Author(s):  
Tianqi Wang ◽  
Yucheng Long ◽  
Xingchen Wang ◽  
San Zhang ◽  
Haiming Wang
Keyword(s):  
Heavy Metal ◽  
Metal Ion ◽  
Ion Concentration ◽  
Heavy Metal Ion ◽  
System Control ◽  
Soft Sensing ◽  
Control Scheme ◽  
Sensing Model ◽  
Design Idea

scholarly journals PENGOLAHAN LIMBAH LOGAM BERAT INDUSTRI TEKSTIL MENGGUNAKAN FOTOKATALIS TiO2/ARANG AKTIF

Molekul ◽  
2008 ◽  
Vol 3 (1) ◽  
pp. 40 ◽  
Author(s):  
Kapti Riyani ◽  
Tien Setyaningtyas ◽  
Roy Andreas
Keyword(s):  
Waste Water ◽  
Heavy Metal ◽  
Metal Ion ◽  
Ph Effect ◽  
Ion Concentration ◽  
Heavy Metal Ion ◽  
Active Charcoal ◽  
Textile Waste ◽  
Uv Lamp ◽  
Textile Waste Water

Study about the use of active charcoal rice straws (AAJP) was done in order to decrease heavy metal ion on textile waste water by using photocatalyst AAJP/TiO2. Rice straws were gained from the Banyumas Regency and samples textile waste water from one of textile industry in Pemalang. This study was begun by the making of active charcoal from the rice straws, and then the modification of photocatalyst AAJP/TiO2 was done with the comparison 1:99, 2:98, 3:97, 4:96, 5:95. The test of heavy metal ion photoreduction was done with some parameters such as weight comparison (1:99, 2:98, 3:97, 4:96, 5:95), pH effect (2, 5, 7, 9, 13) and the effect of ray source (sun light and the UV lamp). Analysis of photocatalyst material used SEM and heavy metal ion concentration used AAS. Results show that optimum photocatalyst activity in weight comparison AAJP300oC / TiO2 (1:99) with decrease concentration was 65.02% for heavy metal ion, mean while AAJP700oC / TiO2 (3:97) with decreased concentration of heavy metal ion is 94.50%. Optimal process for heavy metal ion reduction occur at pH 2 with decreased concentration of heavy metal ion for AAJP300oC / TiO2 (1:99) is 99.87% and for AAJP700oC /TiO2 (3:97) is 100%. The source of UV lamp was good for heavy metal ion photoreduction (AAJP300oC/TiO2(1:99) was 99.87% and AAJP700oC/TiO2 (3:97) was 100%)

An integrated prediction model of heavy metal ion concentration for iron electrocoagulation process

2020 ◽  
Vol 391 ◽  
pp. 123628 ◽  
Author(s):  
Fengxue Zhang ◽  
Chunhua Yang ◽  
Hongqiu Zhu ◽  
Yonggang Li ◽  
Weihua Gui
Keyword(s):  
Heavy Metal ◽  
Prediction Model ◽  
Metal Ion ◽  
Ion Concentration ◽  
Heavy Metal Ion ◽  
Electrocoagulation Process

Optical fiber sensors for measurement of heavy metal ion concentration: A review

Measurement ◽  
2020 ◽  
Vol 158 ◽  
pp. 107742 ◽  
Author(s):  
Ya-nan Zhang ◽  
Yang Sun ◽  
Lu Cai ◽  
Yiping Gao ◽  
Yi Cai
Keyword(s):  
Heavy Metal ◽  
Optical Fiber ◽  
Metal Ion ◽  
Optical Fiber Sensors ◽  
Ion Concentration ◽  
Heavy Metal Ion ◽  
Fiber Sensors

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

2002 ◽  
Vol 20 (7) ◽  
pp. 607-617 ◽  
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.

Strong luminescence and sharp heavy metal ion sensitivity of water-soluble hybrid polysaccharide nanoparticles with Eu3+ and Tb3+ inclusions

2019 ◽  
Vol 9 (8) ◽  
pp. 1833-1844 ◽  
Author(s):  
Xiao Li ◽  
Jing Wang ◽  
Jin Liu ◽  
Jianguo Tang ◽  
Jing Wang ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Metal Ion ◽  
Water Soluble ◽  
Heavy Metal Ion ◽  
Strong Luminescence
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