Leaching of Boron From Coal Ash

James A. Cox; Gary L. Lundquist; Andrzej Przyjazny; C. David Schmulbach

doi:10.1021/es60142a010

Leaching of Boron From Coal Ash

James A. Cox, Gary L. Lundquist, Andrzej Przyjazny, C. David Schmulbach

Kettering University

Research output: Contribution to journal › Article › peer-review

Abstract

Coal fly ash contains significant levels of boron, which is potentially phytotoxic if it is in a soluble state. The quantity of boron leached and the factors that influence the leaching process were studied. Boron levels in fly ash were found as high as 1900 ppm, and about 50% was leachable into water. The leaching rate was greater into acid solution, but the total soluble quantity was independent of pH over the range 6-8. The boron content of bottom ash was 960 ppm, and it was essentially insoluble. Treatment of ash for 30 min at 1200 °C decreased the leachable boron in fly ash to 6% of the total. From ESCA spectra of fly ash, before and after leaching, it was apparent that the boron is initially in two independent chemical states, one of which is insoluble.

Original language	American English
Journal	Environmental Science Technology
Volume	12
DOIs	https://doi.org/10.1021/es60142a010
State	Published - Jun 1 1978

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Biochemistry
Chemistry

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title = "Leaching of Boron From Coal Ash",

abstract = " Coal fly ash contains significant levels of boron, which is potentially phytotoxic if it is in a soluble state. The quantity of boron leached and the factors that influence the leaching process were studied. Boron levels in fly ash were found as high as 1900 ppm, and about 50% was leachable into water. The leaching rate was greater into acid solution, but the total soluble quantity was independent of pH over the range 6-8. The boron content of bottom ash was 960 ppm, and it was essentially insoluble. Treatment of ash for 30 min at 1200 °C decreased the leachable boron in fly ash to 6% of the total. From ESCA spectra of fly ash, before and after leaching, it was apparent that the boron is initially in two independent chemical states, one of which is insoluble. ",

author = "Cox, {James A.} and Lundquist, {Gary L.} and Andrzej Przyjazny and Schmulbach, {C. David}",

note = "51 (21) , 12190-12199. DOI: 10.1021/acs.est.7b03716.",

year = "1978",

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TY - JOUR

T1 - Leaching of Boron From Coal Ash

AU - Cox, James A.

AU - Lundquist, Gary L.

AU - Przyjazny, Andrzej

AU - Schmulbach, C. David

N1 - 51 (21) , 12190-12199. DOI: 10.1021/acs.est.7b03716.

PY - 1978/6/1

Y1 - 1978/6/1

N2 - Coal fly ash contains significant levels of boron, which is potentially phytotoxic if it is in a soluble state. The quantity of boron leached and the factors that influence the leaching process were studied. Boron levels in fly ash were found as high as 1900 ppm, and about 50% was leachable into water. The leaching rate was greater into acid solution, but the total soluble quantity was independent of pH over the range 6-8. The boron content of bottom ash was 960 ppm, and it was essentially insoluble. Treatment of ash for 30 min at 1200 °C decreased the leachable boron in fly ash to 6% of the total. From ESCA spectra of fly ash, before and after leaching, it was apparent that the boron is initially in two independent chemical states, one of which is insoluble.

AB - Coal fly ash contains significant levels of boron, which is potentially phytotoxic if it is in a soluble state. The quantity of boron leached and the factors that influence the leaching process were studied. Boron levels in fly ash were found as high as 1900 ppm, and about 50% was leachable into water. The leaching rate was greater into acid solution, but the total soluble quantity was independent of pH over the range 6-8. The boron content of bottom ash was 960 ppm, and it was essentially insoluble. Treatment of ash for 30 min at 1200 °C decreased the leachable boron in fly ash to 6% of the total. From ESCA spectra of fly ash, before and after leaching, it was apparent that the boron is initially in two independent chemical states, one of which is insoluble.

UR - https://pubs.acs.org/doi/abs/10.1021/es60142a010

U2 - 10.1021/es60142a010

DO - 10.1021/es60142a010

M3 - Article

VL - 12

JO - Environmental Science Technology

JF - Environmental Science Technology

ER -

Leaching of Boron From Coal Ash

Abstract

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