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 Characterization of a heavy metal ion transporter in the lysosomal membrane

FEBS Letters ◽  
1998 ◽  
Vol 436 (2) ◽  
pp. 223-227 ◽  
Author(s):  
Adrie C Havelaar ◽  
Izaäk L de Gast ◽  
Saskia Snijders ◽  
Cecile E.M.T Beerens ◽  
Grazia M.S Mancini ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Metal Ion ◽  
Lysosomal Membrane ◽  
Heavy Metal Ion ◽  
Ion Transporter

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%)

Characterization of water bamboo husk biosorbents and their application in heavy metal ion trapping

2014 ◽  
Vol 113 ◽  
pp. 59-63 ◽  
Author(s):  
Hillary B. Asberry ◽  
Chung-Yih Kuo ◽  
Chin-Hau Gung ◽  
Eric D. Conte ◽  
Shing-Yi Suen
Keyword(s):  
Heavy Metal ◽  
Metal Ion ◽  
Ion Trapping ◽  
Heavy Metal Ion

Characterization of carbon nano-onions for heavy metal ion remediation

2012 ◽  
Vol 14 (9) ◽  
Author(s):  
Megan B. Seymour ◽  
Chunming Su ◽  
Yang Gao ◽  
Yongfeng Lu ◽  
Yusong Li
Keyword(s):  
Heavy Metal ◽  
Metal Ion ◽  
Heavy Metal Ion
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