TY - JOUR
T1 - Production of sorptive granules from incinerated sewage sludge ash and upcycling in cement mortar
AU - Wang, Qiming
AU - Li, Jiang shan
AU - Poon, Chi Sun
N1 - Funding Information:
The authors would like to thank the financial supports of the Environment and Conservation Fund of the Hong Kong SAR government under the [No. P0014071] and the National Natural Science Foundation of China/Hong Kong Research Grants Council Joint Research Scheme under grant [No. 51861165104; N_PolyU511/18].
Publisher Copyright:
© 2022 Elsevier B.V.
PY - 2023/3/15
Y1 - 2023/3/15
N2 - This paper describes a method to produce sorptive granules solely from solid waste. The produced granules can remove multi-toxic heavy metal(loid)s from wastewaters and be upcycled as lightweight aggregates in cement mortars. Specifically, kilogram-scale production of millimeter-sized granules was obtained via the thermal treatment of green bodies prepared from phosphorus-stripped incinerated sewage sludge ash (ISSA), peanut shell and waste bentonite at a mass ratio of 1:1:2 at 1050 °C under a N2 atmosphere. The synthesized granules with good mechanical strength (4.9 MPa) exhibited excellent adsorption capacities towards As(V), Cr(VI), Cu(II) and Pb(II) at respectively 14.11, 5.79, 14.12 and 23.52 mg/g at an initial solution pH of 3.0 via mechanisms including redox reactions, complexation, (co)precipitation, and cation exchange. Moreover, the potentially hazardous spent granules could be environmental safely reused as a partial river sand replacement in cement mortars based on the Toxicity Characteristics Leaching Procedure.
AB - This paper describes a method to produce sorptive granules solely from solid waste. The produced granules can remove multi-toxic heavy metal(loid)s from wastewaters and be upcycled as lightweight aggregates in cement mortars. Specifically, kilogram-scale production of millimeter-sized granules was obtained via the thermal treatment of green bodies prepared from phosphorus-stripped incinerated sewage sludge ash (ISSA), peanut shell and waste bentonite at a mass ratio of 1:1:2 at 1050 °C under a N2 atmosphere. The synthesized granules with good mechanical strength (4.9 MPa) exhibited excellent adsorption capacities towards As(V), Cr(VI), Cu(II) and Pb(II) at respectively 14.11, 5.79, 14.12 and 23.52 mg/g at an initial solution pH of 3.0 via mechanisms including redox reactions, complexation, (co)precipitation, and cation exchange. Moreover, the potentially hazardous spent granules could be environmental safely reused as a partial river sand replacement in cement mortars based on the Toxicity Characteristics Leaching Procedure.
KW - Incinerated sewage sludge ash
KW - Lightweight aggregate
KW - Sorption
KW - Waste management
UR - http://www.scopus.com/inward/record.url?scp=85145820134&partnerID=8YFLogxK
U2 - 10.1016/j.seppur.2022.123046
DO - 10.1016/j.seppur.2022.123046
M3 - Journal article
AN - SCOPUS:85145820134
SN - 1383-5866
VL - 309
JO - Separation and Purification Technology
JF - Separation and Purification Technology
M1 - 123046
ER -