The Application of Nano‐Sized Zero‐Valent Iron for In Situ Remediation of Chlorinated Ethylenes in Groundwater: A Field Case Study

Lacina, Petr; Dvořák, Vojtěch; Vodickova, Eva; Barson, Prokop; Kalivoda, Josef; Goold, Scott

doi:10.2175/106143015x14212658613596

Cited by 30 publications

(5 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Zero‐valent iron (ZVI) is an environmentally friendly material that is widely used for the removal of pollutants such as dyes, antibiotics, nitroaromatics, chlorinated organic compounds, and other toxic pollutants, owing to its advantages such as low cost, easy availability, and relatively strong reducibility ( E ɵ (Fe 2+ /Fe 0 ) = −0.44 V). However, ZVI remediation technology has the shortcomings of increased pH in reaction media and subsequent surface passivation due to the formation of iron (hydr)oxide film, which reduces the reactivity and reusability of the ZVI .…”

Section: Introductionmentioning

confidence: 99%

Pyrite enhanced the reactivity of zero‐valent iron for reductive removal of dyes

Chen

Han

et al. 2020

J of Chemical Tech & Biotech

View full text Add to dashboard Cite

BACKGROUND Zero‐valent iron (ZVI) is an environmentally friendly and cost‐efficient material for the removal of contaminants. However, its application is challenged by problems such as surface passivation and pH increase in the reaction media. As a potential solution for this problem, pyrite, a waste of the mining industry, was used together with ZVI for reductive removal of azo dyes. RESULTS In comparison with ZVI alone, the ZVI/pyrite mixture showed dramatically enhanced efficiency and reusability for dye removal, although pyrite itself can hardly remove dyes. The reaction rate constant kobs for the removal of Orange II at the initial pH (pH0) of 7.0 was enhanced 9.4‐ to 28.0‐fold by using the mixture at a pyrite/ZVI mass ratio ranging from 1 to 4, respectively. The mechanism studies indicate that pyrite not only helped produce more iron(II) by facilitating iron corrosion and the iron(II)/iron(III) cycle in the mixed system, but also activated the ZVI surface by in situ sulfidation. The high reactivity of the adsorbed iron(II) in the mixed system significantly contributed to dye removal, especially at the alkalescent pH. CONCLUSION Pyrite accelerated the reductive removal of dyes by ZVI, through inhibiting its surface passivation and suppressing the pH increase in the reaction media. Therefore, this research proposes a facile method for enhancing the reactivity and applicability of ZVI in environmental remediation. © 2020 Society of Chemical Industry

show abstract

Section: Introductionmentioning

confidence: 99%

Pyrite enhanced the reactivity of zero‐valent iron for reductive removal of dyes

Chen

Han

et al. 2020

J of Chemical Tech & Biotech

View full text Add to dashboard Cite

show abstract

“…Nanopartikel besi telah menjadi pilihan yang semakin banyak digunakan untuk penanganan limbah berbahaya dan beracun, dan untuk remediasi situs yang tercemar (Shu et al, 2010;El-Temsah et al, 2013;Tosco et al, 2014;Bruton et al, 2015;Lacina et al, 2015;El-Temsah et al, 2016). Penelitian-penelitian lain juga menunjukkan bahwa nanopartikel yang dibuat dari tanaman (biosintesis) aman bagi lingkungan dan manusia (Saif et al, 2016;Kumar et al, 2017;Bhuvaneshwari et al, 2017).…”

Section: Gambar 6 Hasil Analisis Sem Nano Partikel Besiunclassified

Pemanfaatan Scrap Besi Menjadi Copperas dan Ekstrak Kulit Rambutan untuk Pembuatan Nanopartikel Besi yang Ramah Lingkungan

2022

View full text Add to dashboard Cite

Dalam beberapa tahun terakhir, pembuatan nanopartikel besi telah menjadi perhatian karena efisiensinya pada penghilangan beberapa jenis zat pencemar. Zat-zat pencemar yang dapat diolah dengan nanopartikel besi antara lain senyawa azo, pelarut terklorinasi, pestisida terklorinasi, anion anorganik dan logam transisi, polutan organik dan anorganik, logam berat, nitrat, bromida, arsen, kromium, timbal, antibiotik, dan pewarna. Pada umumnya, pembuatan nanopartikel besi dilakukan dengan mereduksi besi bermuatan tiga/dua dengan natrium tetra borana, NaBH4. Pembuatan nnanopartikel besi menggunakan NaBH4 menghasilkan produk samping berupa asam borat yang beracun dan gas hidrogen yang mudah meledak atau terbakar. Penelitian ini bertujuan membuat nanopartikel besi dengan memanfaatkan limbah scrap besi menjadi copperas kemudian mereaksikan dengan ekstrak kulit rambutan. Metode yang dilakukan adalah mereaksikan scrap besi dengan asam sulfat sampai terbentuk copperas yang berwarna biru kehijauan. Copperas yang dihasilkan dibuat menjadi larutan kemudian direksikan dengan ekstrak kulit rambutan. Larutan hitam yang dihasilkan dikarakterisasi dengan Spektrofotometri UV-Vis dan TEM. Larutan berwarna hitam dikeringkan dengan cara spray drying kemudian serbuk nanopartikel besi dikarakterisasi dengan XRD, FTIR, dan SEM-EDX. Hasil penelitian menunjukkan bahwa scrap besi dapat dibuat menjadi copperas dengan kadar Fe 22,09%. Ekstrak kulit rambutan mengandung kadar fenol total 877,39 ± 16,6 ppm/100 g kulit rambutan atau setara dengan 441,42 mg GAE/100 g kulit rambutan. Nanopartikel besi berhasil dibuat dari copperas dari scrap besi dan ekstrak kulit rambutan yang mempunyai karakter Surface Plasmon Resonance (SPR) pada serapan 214 nm, ukuran partikel 5-20 nm dalam bentuk larutan dan 20-70 nm dalam bentuk serbuk. Hasil ini bisa menjadi alternatif produksi nanopartikel besi suatu material bermanfaat untuk mencegah terjadinya pencemaran lingkungan. ABSTRACTIn recent years, the manufacture of iron nanoparticles has become a concern because of its efficiency in removing several types of contaminants. Pollutants that can be treated with iron nanoparticles include azo compounds, chlorinated solvents, chlorinated pesticides, inorganic anions and transition metals, organic and inorganic pollutants, heavy metals, nitrates, bromides, arsenic, chromium, lead, antibiotics, and dyes. In general, the manufacture of iron nanoparticles is carried out by reducing three/two charged iron with sodium tetra borane, NaBH4. The manufacture of iron nanoparticles using NaBH4 produces toxic by-products in the form of boric acid and hydrogen gas which is flammable or explosive. This study aims to make iron nanoparticles by utilizing scrap iron waste into copperas then reacting it with rambutan peel extract. The method used is to react iron scrap with sulfuric acid to form copperas which is blue-green in color. The resulting copperas were made into a solution and then treated with rambutan peel extract. The resulting black solution was characterized by UV-Vis Spectrophotometry and TEM. The black solution was dried by spray drying and then the powdered iron nanoparticles were characterized by XRD, FTIR, and SEM-EDX. The results showed that iron scrap can be synthesized into ferrous sulfate with 22.09% Fe content. Rambutan peel extract contains a total phenol content of 877.39 ± 16.6 ppm/100 g rambutan peel or equivalent to 441.42 mg GAE/100 g rambutan peel. Iron nanoparticles were successfully made from copperas from iron scrap and rambutan peel extract with the characteristics of having Surface Plasmon Resonance (SPR) at an absorption of 214 nm, particle size of 5-20 nm in solution form and 20-70 nm in powder form. This result can be an alternative for the production of iron nanoparticles, a useful material to prevent environmental pollution.

show abstract

“…y = 4,9206x + 0,0008 R² = 0,999 0,0000 0,0050 0,0100 0,0150 0,0200 0,0250 0,0300 0,00000 0,00200 0,00400 0,00600 Berdasarkan uraian di atas, penggunaan abu vulkanik dan limbah seng sesuai dengan prinsip Green chemistry/ramah lingkungan yaitu; a) minimalisasi limbah, b) mengurangi penggunaan bahan kimia toksik, c) menambah upaya pemakaian pelarut dan bahan kimia lain yang non toksik. (Sunardi dkk., 2022) Nanokomposit ZnO/SiO2 telah menjadi pilihan yang semakin banyak digunakan untuk penanganan limbah berbahaya dan beracun, dan untuk remediasi situs yang tercemar (Shu et al, 2010;El-Temsah et al, 2013;Tosco et al, 2014;Lacina et al, 2015;El-Temsah et al, 2016). Penelitian-penelitian lain juga menunjukkan bahwa nanopartikel yang dibuat dari tanaman (biosintesis) aman bagi lingkungan dan manusia (Saif et al, 2016;Kumar et al, 2017;Bhuvaneshwari et al, 2017).…”

Section: E Penentuan Isoterm Dan Kapasitas Adsorpsiunclassified

Transformasi Abu Vulkanik dan Limbah Seng menjadi Nanokomposit ZnO-SiO2 dan Aplikasinya untuk Degradasi Rhodamin B

Sunardi,

Silviana

2022

J. Ilmu Lingk.

View full text Add to dashboard Cite

Rhodamine B is a non-biodegradable organic pollutant that is difficult to decompose by microorganisms. If it is possible to be degraded it will take a long time. The semiconductor used is ZnO using SiO2 host material. The reason for using SiO2 is that apart from high efficiency, there are also abundant raw materials because the eruption of Mount Merapi occurs regularly every 4 years. The high content of SiO2 in volcanic ash can be utilized and processed into silica gel through the formation of potassium silicate resulting from the reaction between SiO2 in volcanic ash and potassium hydroxide. In addition to the presence of abundant SiO2, ZnO sources from lathe workshop waste are also easily obtained. The manufacture of ZnO/SiO2 nanocomposites was carried out using the sol – gel method because it is easy and has high effectiveness. ZnO/SiO2 nanocomposite was applied as an adsorbent to degrade Rhodamine B. This study aims to determine the character of ZnO/SiO2 nanocomposite and to determine the best conditions for optimal degradation. Synthesis of ZnO/SiO2 nanocomposite based on volcanic ash and zinc waste resulted in a composite size with a size range of 100-200 nm and a uniform circular shape. The results of the FTIR test show that SiO is at a wavelength of 993.34 and 1109.07 cm-1, while ZnO is at a wavelength of 443.63 cm-1. The XRD results of ZnO/SiO2 nanocomposite are known to peak at 2𝜃, namely 30.42o, 31.56o, and 44.40o. The application of dye degradation on UV irradiation, as well as looking for pH, time, and concentration gave the maximum Rhodamine B degradation value. The results of this study indicate that the highest efficiency in decreasing the concentration of Rhodamine B was obtained at pH 3 with a contact time of 60 minutes and a concentration of Rhodamine B of 10 ppm. The degradation efficiency of Rhodamine B obtained under these conditions is 95.8690%. Based on the concentration variation data processing using the Langmuir isotherm equation, it is known that the adsorption capacity of Rhodamine B is 97.3458521%.

show abstract

The Application of Nano‐Sized Zero‐Valent Iron for In Situ Remediation of Chlorinated Ethylenes in Groundwater: A Field Case Study

Cited by 30 publications

References 9 publications

Pyrite enhanced the reactivity of zero‐valent iron for reductive removal of dyes

Pyrite enhanced the reactivity of zero‐valent iron for reductive removal of dyes

Pemanfaatan Scrap Besi Menjadi Copperas dan Ekstrak Kulit Rambutan untuk Pembuatan Nanopartikel Besi yang Ramah Lingkungan

Transformasi Abu Vulkanik dan Limbah Seng menjadi Nanokomposit ZnO-SiO2 dan Aplikasinya untuk Degradasi Rhodamin B

Contact Info

Product

Resources

About