Valorisation of agricultural waste derived biochars in aquaculture to remove organic micropollutants from water-experimental study and molecular dynamics simulations

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388971%3A_____%2F21%3A00547931" target="_blank" >RIV/61388971:_____/21:00547931 - isvavai.cz</a>

Result on the web

<a href="https://www.sciencedirect.com/science/article/pii/S0301479721017795?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0301479721017795?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jenvman.2021.113717" target="_blank" >10.1016/j.jenvman.2021.113717</a>

Result language

angličtina

Original language name

Valorisation of agricultural waste derived biochars in aquaculture to remove organic micropollutants from water-experimental study and molecular dynamics simulations

Original language description

In this work, we evaluated the valorisation of agricultural waste materials by transforming coconut husks and shells, corncobs and rice straw into biochar for water treatment in aquaculture. We compared the biochars' suitability for removal of organic micropollutants (acetaminophen, oxytetracycline, tetracycline, enrofloxacin, atrazine, diuron and diclofenac) from surface water needed for aquaculture. The biochars were prepared by three methods ranging from inexpensive drum kilns (200 degrees C) to pyrolysis with biogasfication (350-750 degrees C). Overall, antibiotics tetracycline and enrofloxacin were the most strongly sorbed micropollutants, and coconut husk biochar prepared at 750 degrees C was the best sorbent material. Molecular Dynamics simulations indicated that the major sorption mechanism is via 7C-7C stacking interactions and there is a possibility of multilayer sorption for some of the micropollutants. We observed, a strong impact of ionic strength (salinity), which is an important consideration in coastal aquaculture applications. High salinity decreased the sorption for antibiotics oxytetracycline, tetracycline and enrofloxacin but increased diclofenac, atrazine and diuron sorption. We considered coconut husk biochar produced in drum kilns the most practical option for biochar applications in small-scale coastal aquacultures in South Asia. Pilot trials of canal water filtration at an aquaculture farm revealed that micropollutant sorption by coconut husk biochar under real-world conditions might be 10-500 times less than observed in the laboratory studies. Even so, biochar amendment of sand enhanced the micropollutant retention, which may facilitate subsequent biodegradation and improve the quality of brackish surface water used for food production in coastal aquaculture.

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

10511 - Environmental sciences (social aspects to be 5.7)

Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2021

Confidentiality

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

Name of the periodical

Journal of Environmental Management

ISSN

0301-4797

e-ISSN

1095-8630

Volume of the periodical

300

Issue of the periodical within the volume

DEC 15 2021

Country of publishing house

GB - UNITED KINGDOM

Number of pages

9

Pages from-to

113717

UT code for WoS article

000704807700008

EID of the result in the Scopus database

2-s2.0-85115081942