Mechanisms of hydrogen sulfide removal by ground granulated blast furnace slag amended soil

Mengyao Xie; Anthony Kwan Leung; Charles Wang Wai Ng

doi:10.1016/j.chemosphere.2017.02.016

Mechanisms of hydrogen sulfide removal by ground granulated blast furnace slag amended soil

Mengyao Xie (Lead / Corresponding author), Anthony Kwan Leung, Charles Wang Wai Ng

Civil Engineering

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

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Abstract

Ground granulated blast furnace slag (GGBS) amended soil has been found able to remove gaseous hydrogen sulfide (H2S). However, how H2S is removed by GGBS amended soil and why GGBS amended soil can be regenerated to remove H2S are not fully understood. In this study, laboratory column tests together with chemical analysis were conducted to investigate and reveal the mechanisms of H2S removal process in GGBS amended soil. Sulfur products formed on the surface of soil particle and in pore water were quantified. The test results reveal that the reaction between H2S and GGBS amended soil was combined process of oxidation and acid-base reaction. The principal mechanism to remove H2S in GGBS amended soil was through the formation of acid volatile sulfide (AVS), elemental sulfur and thiosulfate. Soil pH value decreased gradually during regeneration and reuse cycles. It is found that the AVS plays a significant role in H2S removal during regeneration and reuse cycles. Adding GGBS increased the production of AVS and at the same time suppressed the formation of elemental sulfur. This mechanism is found to be more prominent when the soil water content is higher, leading to increased removal capacity.

Original language	English
Pages (from-to)	425-430
Number of pages	6
Journal	Chemosphere
Volume	175
Early online date	6 Feb 2017
DOIs	https://doi.org/10.1016/j.chemosphere.2017.02.016
Publication status	Published - May 2017

Keywords

H2S
GGBS
sulfur
AVS
Regeneration

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10.1016/j.chemosphere.2017.02.016

Author Accepted Manuscript
© 2017. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
Accepted author manuscript, 788 KBLicence: CC BY-NC-ND

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title = "Mechanisms of hydrogen sulfide removal by ground granulated blast furnace slag amended soil",

abstract = "Ground granulated blast furnace slag (GGBS) amended soil has been found able to remove gaseous hydrogen sulfide (H2S). However, how H2S is removed by GGBS amended soil and why GGBS amended soil can be regenerated to remove H2S are not fully understood. In this study, laboratory column tests together with chemical analysis were conducted to investigate and reveal the mechanisms of H2S removal process in GGBS amended soil. Sulfur products formed on the surface of soil particle and in pore water were quantified. The test results reveal that the reaction between H2S and GGBS amended soil was combined process of oxidation and acid-base reaction. The principal mechanism to remove H2S in GGBS amended soil was through the formation of acid volatile sulfide (AVS), elemental sulfur and thiosulfate. Soil pH value decreased gradually during regeneration and reuse cycles. It is found that the AVS plays a significant role in H2S removal during regeneration and reuse cycles. Adding GGBS increased the production of AVS and at the same time suppressed the formation of elemental sulfur. This mechanism is found to be more prominent when the soil water content is higher, leading to increased removal capacity. ",

keywords = "H2S, GGBS, sulfur, AVS, Regeneration",

author = "Mengyao Xie and Leung, {Anthony Kwan} and Ng, {Charles Wang Wai}",

note = "The authors would like to acknowledge the research grant grant (HKUST6/CRF/12R) provided by the Research Grants Council (RGC) of the Hong Kong Special Administrative Region. The second author would also like to acknowledge the research travel support from the Northern Research Partnership (NRP).",

year = "2017",

month = may,

doi = "10.1016/j.chemosphere.2017.02.016",

language = "English",

volume = "175",

pages = "425--430",

journal = "Chemosphere",

issn = "0045-6535",

publisher = "Elsevier",

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TY - JOUR

T1 - Mechanisms of hydrogen sulfide removal by ground granulated blast furnace slag amended soil

AU - Xie, Mengyao

AU - Leung, Anthony Kwan

AU - Ng, Charles Wang Wai

N1 - The authors would like to acknowledge the research grant grant (HKUST6/CRF/12R) provided by the Research Grants Council (RGC) of the Hong Kong Special Administrative Region. The second author would also like to acknowledge the research travel support from the Northern Research Partnership (NRP).

PY - 2017/5

Y1 - 2017/5

N2 - Ground granulated blast furnace slag (GGBS) amended soil has been found able to remove gaseous hydrogen sulfide (H2S). However, how H2S is removed by GGBS amended soil and why GGBS amended soil can be regenerated to remove H2S are not fully understood. In this study, laboratory column tests together with chemical analysis were conducted to investigate and reveal the mechanisms of H2S removal process in GGBS amended soil. Sulfur products formed on the surface of soil particle and in pore water were quantified. The test results reveal that the reaction between H2S and GGBS amended soil was combined process of oxidation and acid-base reaction. The principal mechanism to remove H2S in GGBS amended soil was through the formation of acid volatile sulfide (AVS), elemental sulfur and thiosulfate. Soil pH value decreased gradually during regeneration and reuse cycles. It is found that the AVS plays a significant role in H2S removal during regeneration and reuse cycles. Adding GGBS increased the production of AVS and at the same time suppressed the formation of elemental sulfur. This mechanism is found to be more prominent when the soil water content is higher, leading to increased removal capacity.

AB - Ground granulated blast furnace slag (GGBS) amended soil has been found able to remove gaseous hydrogen sulfide (H2S). However, how H2S is removed by GGBS amended soil and why GGBS amended soil can be regenerated to remove H2S are not fully understood. In this study, laboratory column tests together with chemical analysis were conducted to investigate and reveal the mechanisms of H2S removal process in GGBS amended soil. Sulfur products formed on the surface of soil particle and in pore water were quantified. The test results reveal that the reaction between H2S and GGBS amended soil was combined process of oxidation and acid-base reaction. The principal mechanism to remove H2S in GGBS amended soil was through the formation of acid volatile sulfide (AVS), elemental sulfur and thiosulfate. Soil pH value decreased gradually during regeneration and reuse cycles. It is found that the AVS plays a significant role in H2S removal during regeneration and reuse cycles. Adding GGBS increased the production of AVS and at the same time suppressed the formation of elemental sulfur. This mechanism is found to be more prominent when the soil water content is higher, leading to increased removal capacity.

KW - H2S

KW - GGBS

KW - sulfur

KW - AVS

KW - Regeneration

U2 - 10.1016/j.chemosphere.2017.02.016

DO - 10.1016/j.chemosphere.2017.02.016

M3 - Article

C2 - 28236711

SN - 0045-6535

VL - 175

SP - 425

EP - 430

JO - Chemosphere

JF - Chemosphere

ER -

Mechanisms of hydrogen sulfide removal by ground granulated blast furnace slag amended soil

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Keywords

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