Arsenic as a contaminant of struvite when recovering phosphorus from phosphogypsum wastewater

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F62156489%3A43510%2F21%3A43920402" target="_blank" >RIV/62156489:43510/21:43920402 - isvavai.cz</a>

Result on the web

<a href="https://doi.org/10.1016/j.jtice.2021.10.005" target="_blank" >https://doi.org/10.1016/j.jtice.2021.10.005</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jtice.2021.10.005" target="_blank" >10.1016/j.jtice.2021.10.005</a>

Result language

angličtina

Original language name

Arsenic as a contaminant of struvite when recovering phosphorus from phosphogypsum wastewater

Original language description

Background: Phosphogypsum is a waste product from production of phosphorus and is stored in a containment pond. Phosphogypsum wastewater still contains a usable amount of phosphorus. In addition to phosphorus, this water contains a small amount of arsenic, which prevents direct use of this water in agriculture. Method: Recycling of phosphorus from phosphogypsum wastewater was performed by struvite (NH4MgPO4 6H2O), precipitation. Arsenostruvite (NH4MgAsO4 6H2O) has always occurred naturally in the presence of struvite. The properties of arsenostruvite in comparison with struvite were monitored. The effect of selected reductants (SnCl2, ascorbic acid, K2S2O5) on the potential of reducing the concentration of As in the struvite crystallized from phosphogypsum wastewater, was monitored. Findings: When recovering phosphorus from phosphogypsum wastewater in the form of struvite the results showed that a ratio of As to P was lower by 50% compared to the original wastewater. K2S2O5 proved to be the most effective reducing agent for reducing the arsenic content of the product, but it was still not sufficient for the product to be used as a fertilizer without any further treatment. Method: Recycling of phosphorus from phosphogypsum wastewater was performed by struvite (NH4MgPO4.6H2O), precipitation. Arsenostruvite (NH4MgAsO4.6H2O) has always occurred naturally in the presence of struvite. The properties of arsenostruvite in comparison with struvite were monitored. The effect of selected reductants (SnCl2, ascorbic acid, K2S2O5) on the potential of reducing the concentration of As in the struvite crystallized from phosphogypsum wastewater, was monitored. Findings: When recovering phosphorus from phosphogypsum wastewater in the form of struvite the results showed that a ratio of As to P was lower by 50% compared to the original wastewater. K2S2O5 proved to be the most effective reducing agent for reducing the arsenic content of the product, but it was still not sufficient for the product to be used as a fertilizer without any further treatment.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

40106 - Agronomy, plant breeding and plant protection; (Agricultural biotechnology to be 4.4)

Project

—

Continuities

S - Specificky vyzkum na vysokych skolach

Publication year

2021

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Journal of the Taiwan Institute of Chemical Engineers

ISSN

1876-1070

e-ISSN

—

Volume of the periodical

129

Issue of the periodical within the volume

December

Country of publishing house

NL - THE KINGDOM OF THE NETHERLANDS

Number of pages

6

Pages from-to

91-96

UT code for WoS article

000730177100008

EID of the result in the Scopus database

2-s2.0-85117214380