Extraction of heavy metals from MSWI fly ash using hydrochloric acid and sodium chloride solution

Weibel, Gisela; Eggenberger, Urs; Kulik, Dmitrii A.; Hummel, W.; Schlumberger, Stefan; Klink, Waldemar; Fisch, Martin; Mäder, Urs

doi:10.1016/j.wasman.2018.03.022

Cited by 93 publications

(43 citation statements)

References 29 publications

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“…The main potential environmental risk during the disposal and utilization of MSWI is the leaching of heavy metals. Most heavy metals in fly ash are chlorides and are soluble in water, making it easy to leach and contaminate soil and water [58]. There are many factors that affect the leaching characteristics of heavy metals, including the characteristics of ash, liquid/solid (L/S) ratio, and the pH value.…”

Section: Heavy Metals and Their Leaching Propertiesmentioning

confidence: 99%

Review of harmless treatment of municipal solid waste incineration fly ash

Zhang

Fang

et al. 2020

Waste Dispos. Sustain. Energy

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Incineration is widely adopted in municipal solid waste management, which produces large amounts of municipal solid waste incineration (MSWI) fly ash. The harmless treatment of MSWI fly ash requires the appropriate disposal of heavy metals and dioxins that are enriched in fly ash. This review summarizes recently developed harmless disposal methods for MSWI fly ash including solidification/stabilization, thermal treatment, and separation/extraction. In addition, we discuss heavy metal and dioxin fixation, and the removal capacity of fly ash via solidification/stabilization (including cement solidification, chemical stabilization, hydrothermal processes, and mechano-chemical methods), thermal treatment (including sintering, fuel-burning, or electric melting/vitrification), and separation/extraction (including water-washing, chemical reagent leaching, biological leaching, electrodialysis separation, chemical reagent extraction, and nanomaterials extraction). The advantages and disadvantages of different harmless treatment methods are compared and future research prospects and suggestions are summarized. This review provides general guidelines for the harmless treatment of MSWI fly ash in the future.

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Section: Heavy Metals and Their Leaching Propertiesmentioning

confidence: 99%

Review of harmless treatment of municipal solid waste incineration fly ash

Zhang

Fang

et al. 2020

Waste Dispos. Sustain. Energy

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“…Reaksi yang terjadi, yaitu : NH3 +HCl NH4Cl ΔH= -175,7 kJ/mol Reaksi berlansung secara eksotermik, dan panas yang dibangkitkan yang digunakan untuk menguapkan sebagian besar air, ada ketika asam klorida (33)(34)(35)(36)(37) cair digunakan. Ammonium klorida (23,26,27,29) dapat dihasilkan lewat kristalisasi.…”

Section: Proses Netralisasi Lansungunclassified

“…Di alam, unsur hidrogen merupakan unsur yang paling melimpah dengan presentasi ±75%. Senyawa hidrogen biasanya dihasilkan secara industry dari berbagai senyawa hidrogen, seperti metana (33)(34)(35)(36)(37)(67)(68)(69)(70)(71)(72)(73) . Unsur hidrogen dapat dihasilkan dari air melalui proses elektrolisis (74)(75)(76) .…”

Section: Karakter Atom Penyusun Dari Senyawa Nh4cl 51 Nitrogen N Gamunclassified

Analisis Molekular dan Transpor Ion Amonium Clorida

Rhaska¹,

Zainul²

2019

Preprint

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Ammonium Chlorida merupakan seanyawa anorganik dengan rumus kimia NH4Cl, berupa garam Kristal putih yang sangat mudah larut dalam air.Ammonium Chlorida banyak digunakan pada bidang industry. Tujuan dari review ini untuk mengetahui karakteristik molekul dan transpor ion Ammonium Chlorida. Metode yang digunakan untuk mengetahui karakteristik molekul yaitu metode pemodelan komputasi di ChemOffice 15.0, dan untuk mengetahui transpor ion Ammonium Chlorida yaitu dengan parameter konduktivitas, viskositas, mobilitas ion, dan gerakan hanyut.Hasil yang didapat yaitu struktur molekul Ammonium Chlorida pada analisis molekuler 2D, dan bentuk molekul 3D. Ammonium klorida memiliki sifat termokimia dalam fasa solid dengan ΔS,C,ΔHf,ΔG pada tekanan 1 atm pada suhu 25°C yang masing-masing memiliki nilai 94,56 J mol-1 K-1, 84,1 J mol-1 K-1, -314,43 kJmol-1, dan -202,97 kJmol-1. Pada suhu yang 100°C dengan tekanan yang sama 1 atm ΔH reaksi yang didapatkan bernilai positif sehingga reaksi pembentukan NH4Cl bersifat endotermis. Interaksi molekul yang terjadi pada ion NH4Cl dapat diperhatikan melalui beberapa parameter, diantaranya adalah konduktivitas, mobilitas, serta kecepatan hanyut ionnya. Konduktivitas dari NH4Cl dipengaruhi oleh konsentrasi, semakin banyak ion yang ada dalam larutan maka mobilitas ion yang juga berhubungan dengan kecepatan hanyut dalam larutan akan semakin berkurang sehingga nilai konduktivitas akan menurun. Mobilitas ion NH4+ yaitu 3,5×10-8m2s-1V-1, serta kecepatan hanyut NH4Cl sebesar 3,00 V/cm. Berdasrkan metoda komputasi dengan ChemOffice 3D, energy yang dibutuhkan NH4Cl untuk bergerak sebesar 14,87 kcal/mol

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“…Several studies have been put forward to explain that AFm could effectively reduce the content of heavy metal ions in the water, such as Cr 3+ , CrO 4 2− , Cd 2+ , B 3+ , Se 6+ , and so on [44,51,52]. 4 Advances in Materials Science and Engineering Isomorphous replacement is also known as isomorphous substitution. In mineral crystallization, the position occupied by some ions or atoms in the crystal structure is partly occupied by other ions or atoms of similar nature and size, but the crystal structure is basically unchanged.…”

Section: C-s-h C-s-h Is a Type Of Amorphous Microporousmentioning

confidence: 99%

“…Nowadays, cement-based stabilization/solidification technology has been widely used all over the world for 60 years, it and has become an economic efficiency approach to immobilize toxic and harmful heavy metal in the MSWI fly ash by being fixed in the hydration products, such as calcium silicate hydrate gel (C-S-H) and ettringite (AFt) which were formed by chemical reaction between cement and water [1][2][3][4]. Besides, the advantages of cement-based stabilization/solidification not only have simple operation and low processing cost, but also significant reduction of percolation of heavy metal ions in the hazardous waste landfill, which could meet the Standard for Pollution Control on the Security Landfill.…”

Section: Introductionmentioning

confidence: 99%

Review on Cement Stabilization/Solidification of Municipal Solid Waste Incineration Fly Ash

Fan

Wang

Zhang

2018

Advances in Materials Science and Engineering

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Municipal solid waste incineration (MSWI) fly ash must be treated properly prior to being disposed in the security landfill due to its serious pollution toxicity. Nowadays, lots of studies have demonstrated that cement-based stabilization/solidification could reduce the toxicity pollution effectively by encapsulating the heavy metals into cement matrix, which leads to greater capacity and weight. This paper compares and discusses the MSWI fly ash treatment with the mostly used matrix materials such as Portland cement, phosphate cement, aluminate cement, and alkaline activated cement. Moreover, immobilization mechanism introduced by the interaction between the MSWI fly ash and hydrated cement matrix materials, such as the physical cementing effect, adsorption, isomorphous replacement, and complex precipitation, was explored in depth. The paper also pointed out some reasonable development directions for cement-based stabilization/solidification technology to improve the effectiveness and application of cement-based stabilization/solidification technology.

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Extraction of heavy metals from MSWI fly ash using hydrochloric acid and sodium chloride solution

Cited by 93 publications

References 29 publications

Review of harmless treatment of municipal solid waste incineration fly ash

Review of harmless treatment of municipal solid waste incineration fly ash

Analisis Molekular dan Transpor Ion Amonium Clorida

Review on Cement Stabilization/Solidification of Municipal Solid Waste Incineration Fly Ash

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