Simultaneous preconcentration of Cd(II), Cu(II) and Pb(II) on Nano-TiO2 modified with 2-mercaptobenzothiazole prior to flame atomic absorption spectrometric determination

Pourreza, Nahid; Rastegarzadeh, Saadat; Larki, Arash

doi:10.1016/j.jiec.2013.10.055

Cited by 70 publications

(15 citation statements)

References 31 publications

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“…The principle of SPE is mainly based on the affinity between a solid adsorbent and the analytes, that is, the target compound in the liquid sample is absorbed by the solid adsorbent. Thereby, the adsorbent is the core of SPE that it mainly determines the extraction selectivity and the extraction efficiency . And it is necessary to develop a new type of rapid and efficient adsorbent filler for enhancing analytical sensitivity and precision in SPE techniques.…”

Section: Introductionsupporting

confidence: 59%

Fabrication of novel ZIF‐67 Composite Microspheres for Effective Adsorption and Solid‐phase Extraction of Dyes from Water

Dai

Xiao

et al. 2018

ChemistrySelect

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ZIFs type metal-organic frameworks have been found to rapidly remove organic contaminants from water by adsorption. But ZIFs crystals are not suitable to be directly used as stationary phases of solid-phase extraction (SPE) process, because of the non-spherical morphology. This study reports a novel composite adsorbent, ZIF-67 composite microspheres (ZIF-67 CMs), synthesized via in-situ growing ZIF-67 nanoparticles (ZIF-67 NPs) on the outer surface of resin microspheres (RMs). The assynthesized ZIF-67 CMs were characterized by SEM, XRD, FTIR, BET and TGA experiments, and the removal performance of the ZIF-67 CMs to anion dyes were investigated. It was found that the ZIF-67 CMs showing microsphere morphology were successfully assembled by growing ZIF-67 NPs on RMs and exhibited favorable performance to rapidly adsorptive remove two kinds of anion dyes (Brilliant Blue G and Congo red) from water. The removal rates of the ZIF-67 CMs to a 100 mg L À1 dye solution reached 95.9% and 99.1% in a 1 h and 5 h static adsorption, respectively. The ZIF-67 CMs showing rapid adsorption performance were further studied as stationary phases in SPE procedures for decolorizing dye solutions. The ZIF-67 CMs can efficiently remove more than 99% of dyes at a flow rate of 1.0 mL min À1 in a 5 min operation. The excellent SPE performance of ZIF-67 CMs indicates the potential applications for efficiently concentrating or purifying liquid mixtures by using ZIF-67 CMs or other ZIFs composite microspheres.[a] J.

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Section: Introductionsupporting

confidence: 59%

Fabrication of novel ZIF‐67 Composite Microspheres for Effective Adsorption and Solid‐phase Extraction of Dyes from Water

Dai

Xiao

et al. 2018

ChemistrySelect

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“…Salah satu logam berat yang ada di alam adalah cadmium (Cd), yang memiliki sifat beracun bagi makhluk hidup. Dalam tubuh manusia, Cd akan terakumulasi di hati dengan mengikat gugus sufhidril (-SH) dalam enzim, sehingga dapat merusak kerja enzim yang menyebabkan kerusakan jantung, hati, ginjal paru-paru dan mutagenesis (Pourreza et al, 2014). Pada tanaman akumulasi Cd akan menyebabkan gangguan pertumbuhan hingga mempercepat kematian tanaman (Sutrisno and Kuntyastuti, 2015).…”

Section: Pendahuluanunclassified

Prakonsentrasi Ion Cd(II) dalam Sampel Pupuk Nitrogen, Fosfor dan Kalium (NPK) Menggunakan Alumina Teraktivasi sebagai Material Pengisi Kolom

2020

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<p>ABSTRAK. Prakonsentrasi ion Cd(II) dalam sampel pupuk nitrogen, fosfor dan kalium (NPK) menggunakan alumina teraktivasi sebagai material pengisi kolom telah dilakukan. Alumina terlebih dahulu diaktivasi dengan NaOH pada pH 8 sebelum dimasukkan ke dalam kolom. Beberapa parameter penting dalam tahapan prakonsentrasi yang dapat meningkatkan kinerja analitik pengukuran telah ditentukan menggunakan instrumen spektrofotometer serapan atom (SSA). Hasil penelitian menunjukkan kondisi optimum tahapan prakonsentrasi ion Cd(II), adalah pada volume sampel 10 mL, volume HNO3 adalah 4 mL pada konsentrasi 0,5 M, dengan nilai kapasitas retensi adalah 1,4113 mg Cd(II)/g alumina. Kinerja analitik pengukuran metode sangat baik, ditunjukkan dengan nilai batas deteksi metode adalah 2,7997 μg/L. Presisi metode dinyatakan sebagai persentase koefisien variansi adalah 4,03%. Penggunaan alumina sebagai bahan pengisi kolom dapat meningkatkan signal sebesar 2,5 kali dibandingkan dengan pengukuran ion Cd(II) secara langsung. Akurasi metode ini sangat baik, dengan nilai persen perolehan kembali adalah 91,67 – 103,49%, menunjukkan bahwa matriks sampel tidak mempengaruhi hasil pengukuran, sehingga metode ini dapat digunakan untuk analisis ion Cd(II) dalam sampel pupuk NPK. Estimasi ketidakpastian metode ini juga telah dihitung dan ditunjukkan dengan nilai persen ketidakpastian adalah 14,16%.</p><p>ABSTRACT. Preconcentration of Cd(II) Ion in Nitrogen, Phosphor, and Kalium (NPK) Fertilizer Sample Using Activated Alumina as a Column Filler Material. The research about preconcentration of Cd(II) in NPK fertilizer using activated alumina as a column filler material was done. The column used a filler material of alumina previously activated using NaOH at pH 8. Some important parameters in the preconcentration stage are able to increase the analytical performance, determined using atomic absorption spectrophotometer (AAS). The result of the research shows the optimum condition of preconcentration stage Cd(II) ion are volume of the sample was 10 mL, the volume of eluent HNO3 was 4 mL with a concentration of 0.5 M, with the retention of capacity value was 1.4113 mg Cd(II)/g alumina. The analytical performance of this method is good, shown with the limit of detection value was 2.7997 μg/L. The precision of this method was indicated by the percentage of the coefficient variance of 4.03%. Alumina used as a filler column can increase the signal up to 2.5 times for direct Cd(II) ions measurement. The accuracy of this method is excellent, with the recovery percentage value was 91.67 – 103.49%, indicating that the matrices of NPK fertilizer give no effect on the results of measurements, and this method was capable of analyzing Cd(II) ions in NPK fertilizer. The uncertainty of this method was estimated as the percentage of the uncertainty of 14.16%.</p>

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“…In chemical reaction, these particles tend to be very reactive when compared with their larger counterparts and possess huge amount of energy in high surface to volume ratios that alters their reactivity [20]. Among different metal oxides, Titanium dioxide (TiO 2 ) possess different properties which include both physical and chemical like large surface area, non-toxicity and photocatalysis [21]. Further, they are not pH sensitive and has not poor water wettability as compared to polymeric adsorbents thus depicted remarkable performance in environmental remediation, sensors, solar cells and other fields [22].…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Ananas comosus leaf extract modified titanium dioxide nano bio adsorbent for the sequestration of basic dye from aqueous phase: equilibrium and kinetic studies

Fakhar

Siddiqi

Khan

et al. 2020

Mater. Res. Express

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A novel, titanium dioxide nano bio-adsorbent (TiO 2 L) based on Ananas comosus leaf extract was developed by sol-gel route and was subsequently used to decolorize toxic non-biodegradable basic dye Victoria blue (VB) from the aqueous solution. Several techniques were used to characterize the synthesized bio-adsorbent like XRD, FTIR, SEM-EDX and TEM to observe physio-chemical changes and adsorption interactions. The impact of process parameters on the adsorption behavior of TiO 2 L towards VB were comprehensively studied and the optimized conditions were initial dye concentration (50 mg L −1 ), dose (1.8 g L −1 ), contact time (40 min), and pH (6) of the solution. Different isotherm and kinetic models were used to analyze the equilibrium data among which Langmuir model appropriately fitted the equilibrium data based on high R 2 (0.994) and pseudo second order described the reaction kinetics of VB adsorption onto the adsorbent. The maximum adsorption capacity was found to be 83 mg g −1 . Dye loaded adsorbent was regenerated and used for 3 cycles without subsequent loss in its efficiency. Thus, economic feasibility, environmentally friendly, better sorption capacity and regeneration potential, validates TiO 2 L as a potential adsorbent for VB from wastewater.

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Simultaneous preconcentration of Cd(II), Cu(II) and Pb(II) on Nano-TiO2 modified with 2-mercaptobenzothiazole prior to flame atomic absorption spectrometric determination

Cited by 70 publications

References 31 publications

Fabrication of novel ZIF‐67 Composite Microspheres for Effective Adsorption and Solid‐phase Extraction of Dyes from Water

Fabrication of novel ZIF‐67 Composite Microspheres for Effective Adsorption and Solid‐phase Extraction of Dyes from Water

Prakonsentrasi Ion Cd(II) dalam Sampel Pupuk Nitrogen, Fosfor dan Kalium (NPK) Menggunakan Alumina Teraktivasi sebagai Material Pengisi Kolom

Fabrication of Ananas comosus leaf extract modified titanium dioxide nano bio adsorbent for the sequestration of basic dye from aqueous phase: equilibrium and kinetic studies

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