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Web of Science | Scopus | EBSCO | Information Services Chemical Abstracts Compendex | BazTech
Efekt badań statutowych
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Finansowanie:
This work was supported by the Zhejiang Province Key Research and Development Plan (2020C01017),
National Natural Science Foundation of China (41501341), Zhejiang Province Natural Science Foundation
(LY16D010011), and the Scientific Research Foundation of Zhejiang A & F University (2034020096).
Phosphorus in wastewater is one of the main causes of water eutrophication. Phosphorus removal from
swine wastewater is always a challenge. To achieve on-site recycling of swine farm waste, the low-cost
pyro/hydrochars and their Fe-Mn-modified form were prepared from swine manure as an efficient adsorbent
for phosphate removal. The results showed that the phosphate removal efficiency of unmodified pyro/hydro-
chars was less than 7.77%, which was significantly increased to 58.21–83.76% for the Fe-Mn-modified-
-pyro/hydrochars. The maximum adsorption capacity of pyrochar was found on the Fe-Mn-modified-
-pyrochar (PC-600M) with a surface area of 102.03 m2/g and a micropore volume of 0.25 cm 3/g. The
PC-600M exhibited high adsorption capacity (26.07 mg/g) in a low concentration of phosphate
(50 mg/dm 3), and its removal efficiency reached up to 83.76% within 24 hours. Furthermore, the ad-
sorption of phosphate on biochars without modification (HC-210 and PC-600) was validated using
a first-order kinetic model, and the adsorption of phosphate on modified biochars (HC-210M and
PC-600M) was well described by the second-order kinetic model and Langmuir isotherm. In addition,
there is no significant difference in the adsorption of phosphorus between pyrochars and hydrochars,
but the preparation cost of hydrochars is lower than that of pyrochars. It was confirmed that the low-
-cost Fe-Mn-modified pyro/hydrochar from swine manure had potential for efficient phosphate re-
moval in wastewater treatment and would facilitate value-added utilization of swine manure.
