| Title | Efficient phosphate recycling by adsorption on alkaline sludge biochar |
|---|---|
| ID_Doc | 11041 |
| Authors | Liu, ZH; Liu, HB; Zhang, Y; Lichtfouse, E |
| Title | Efficient phosphate recycling by adsorption on alkaline sludge biochar |
| Year | 2023 |
| Published | Environmental Chemistry Letters, 21, 1 |
| Abstract | Large amounts of septic tank sludges from sanitation facilities are either landfilled or illegally dumped into the natural environment, leading to environmental pollution and waste of resources. This issue calls for advanced methods to recycle septic tank sludges such as sustainable adsorbents to recycle phosphorus, e.g., in agriculture, in the context of the circular economy. Here, we hypothesized that alkaline septic tank sludge biochar could be an efficient adsorbent to recycle phosphate from wastewater. We first prepared raw biochar by pyrolysis of septic tank sludge at 500 degrees C. Then, we prepared alkaline biochar by pyrolysis at 800 degrees C of mixtures of potassium hydroxide (KOH) and raw biochar at 3/1, 4/1 and 5/1 mass ratios. We studied biochar properties by scanning electron microscopy, X-ray diffraction and Fourier transform infrared spectroscopy, and we quantified adsorption of phosphates by biochars. Results show that phosphate adsorption highly increases with KOH content, from 27.83 mg/g for the raw biochar to 42.51 mg/g for the 5/1 KOH-biochar. This trend is explained by the increase in biochar surface area from 64.214 m(2)/g for the raw biochar to 82.901 m(2)/g for the 5/1 KOH-biochar, and by the improvement of the structural properties and surface morphology of KOH-biochars. Overall, alkaline biochar appears as a promising adsorbent to recycle phosphates from wastewaters. |
Similar Articles
| ID | Score | Article |
|---|---|---|
13773
|
Nardis, BO; Franca, JR; Carneiro, JSD; Soares, JR; Guilherme, LRG; Silva, CA; Melo, LCA Production of engineered-biochar under different pyrolysis conditions for phosphorus removal from aqueous solution(2022) | |
| 28814
|
Pap, S; Boyd, KG; Taggart, MA; Sekulic, MT Circular economy based landfill leachate treatment with sulphur-doped microporous biochar(2021) | |
| 20225
|
Marcinczyk, M; Ok, YS; Oleszczuk, P From waste to fertilizer: Nutrient recovery from wastewater by pristine and engineered biochars(2022) | |
| 24411
|
Muscarella, SM; Di Trapani, D; Laudicina, VA; Mannina, G Phosphorus recovery from ultrafiltered membrane wastewater by biochar adsorption columns: The effect of loading rates(2024)Heliyon, 10, 14 | |
| 14405
|
Photiou, P; Koutsokeras, L; Constantinides, G; Koutinas, M; Vyrides, I Phosphate removal from synthetic and real wastewater using thermally treated seagrass residues of Posidonia oceanica(2021) | |
| 8371
|
Liu, HB; Shan, JH; Chen, ZB; Lichtfouse, E Efficient recovery of phosphate from simulated urine by Mg/Fe bimetallic oxide modified biochar as a potential resource(2021) | |
| 30025
|
Gopinath, A; Divyapriya, G; Srivastava, V; Laiju, AR; Nidheesh, P; Kumar, MS Conversion of sewage sludge into biochar: A potential resource in water and wastewater treatment(2021) | |
| 13341
|
Zhang, RC; Liu, H; Sariola-Leikas, E; Tran, KQ; He, C Practical strategies of phosphorus reclamation from sewage sludge after different thermal processing: Insights into phosphorus transformation(2024) | |
| 13509
|
Mayilswamy, N; Nighojkar, A; Edirisinghe, M; Sundaram, S; Kandasubramanian, B Sludge-derived biochar: Physicochemical characteristics for environmental remediation(2023)Applied Physics Reviews, 10, 3 | |
| 14799
|
Medeiros, DCCD; Chelme-Ayala, P; El-Din, MG Sludge-based activated biochar for adsorption treatment of real oil sands process water: Selectivity of naphthenic acids, reusability of spent biochar, leaching potential, and acute toxicity removal(2023) |