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4 protocols using c2h6o

1

Chitosan-based Heavy Metal Adsorption

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Chitosan (deacetylation degree ≥ 95%) was purchased from Macklin Biochemical Technology Co., Ltd. (Shanghai, China). Other chemicals and reagents utilized in the experiments were of analytical grade. FeCl3·6H2O was purchased from Tianjin Fuchen Chemical Reagent Co., Ltd. (Tianjin, China). FeCl2·4H2O was purchased from Tianjin Damao Chemical Reagent Factory (Tianjin, China). NaOH was purchased from Tianjin Guangfu Science and Technology Development Co., Ltd. (Tianjin, China). K2Cr2O7 was purchased from Tianjin Bodi Chemical Co., Ltd. (Tianjin, China). CuCl2·2H2O and ZnCl2 were purchased from Tianjin Komio Chemical Reagent Co., Ltd. (Tianjin, China). Pb(NO3)2, NaHCO3, CH3COOH, KBr, and C2H6O were purchased from Sinopharm Chemical Reagent Co., Ltd. (Shanghai, China).
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2

Synthesis of Calcium-Aluminum Composites

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Calcium chloride dihydrate
(CaCl2·2H2O, Sigma-Aldrich Co., 99%) and
aluminum chloride
hexahydrate (AlCl3·6H2O, Sigma-Aldrich
Co., 99%) were used as calcium source and aluminum source, respectively.
A mixture of distilled water and ethanol (C2H6O: Sinopharm Chemical Reagent Co., Ltd, AR) was used as the solvent.
Poly(ethylene oxide) (PEO: Aladdin Co., AR) with an average molecular
weight (Mw) of 300 000 and propylene
oxide (PO: Sigma-Aldrich Co., 99.5%) were added as the phase separation
inducer and gelation agent, respectively. Glycol (EG: Sinopharm Chemical
Reagent Co., Ltd, AR) and formamide (FA: Sinopharm Chemical Reagent
Co., Ltd, AR) were utilized as the chelating agent and drying control
chemical additive, respectively. CaH2 was used as a reductant
to reduce the sample. All reagents were used as received without further
purification.
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3

Synthesis of Polyvinylpyrrolidone and Metal Complexes

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CO(NH2)2, Co(NO3)2·6H2O, C2H6O, NaOH, C2H3N, C6H15NO3, and C28H31ClN2O3 were procured from Sinopharm Chemical Reagent Co., Ltd. (Shanghai, China). (C6H9NO)n (M.W. ≈ 55,000) was acquired from Aladdin Reagent Co., Ltd. (Shanghai, China). Deionized water was used throughout the experiment. All chemicals were analytically pure and required no further processing.
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4

Synthesis of Silver-Ethylenediamine Complex

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Silver acetate (CH3COOAg, AR 99.5%), ethylenediamine (C2H8N2, GC > 99.0%), and formic acid (CH2O2, AR 88.0%) were purchased from Aladdin. Ammonium hydroxide (NH3·H2O, ~ 25% NH3 basis) and ethanol (C2H6O, AR 99.0%) were provided by Sinopharm Chemical Reagent Co., Ltd., China. CNT films were purchased from Suzhou Jiedi Nanotechnology Co., Ltd., China.
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