Hydrothermal carbonization of microalgae for phosphorus recycling from wastewater to crop-soil systems as slow-release fertilizers

Chu, Qingnan; Lyu, Tao; Xue, Lihong; Yang, Linzhang; Feng, Yanfang; Sha, Zhimin; Yue, Bin; Mortimer, Robert J.G.; Cooper, Mick; Pan, Gang

doi:10.1016/j.jclepro.2020.124627

Cited by 50 publications

(26 citation statements)

References 62 publications

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“…Moreover, microalgae-based wastewater treatment could also provide additional benefits, such as biodiesel generation (Li et al, 2020), nutrient recovery (Chu et al, 2020), and greenhouse gas emission control (Rawat et al, 2011). The present investigation expanded the potential use of cyanobacteria for antibiotic removal at high concentrations.…”

Section: Insight Into Future Implementationmentioning

confidence: 77%

Mitigating antibiotic pollution using cyanobacteria: Removal efficiency, pathways and metabolism

et al. 2021

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Section: Insight Into Future Implementationmentioning

confidence: 77%

Mitigating antibiotic pollution using cyanobacteria: Removal efficiency, pathways and metabolism

et al. 2021

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“…Cd 2+ /Pb 2+ Adsorption Isotherms. 40 mg of BPH200/BP was mixed with a 40 mL solution in centrifuge tubes having different Cd 2+ concentrations (3,6,9,12,18,24,30,40,50,70,90,110,130, and 150 mg•L −1 ) or Pb 2+ concentrations (30,60,90,120,150,180,200,250,300,350, 400, 500, 600, and 700 mg•L −1 ). HNO 3 (0.1 mol•L −1 ) and NaOH (0.1 mol•L −1 ) were used to adjust the initial pH (6.0 ± 0.1) of all treatments.…”

Section: ■ Materials and Methodsmentioning

confidence: 99%

“…Due to their implementation in water at low temperatures (120−250 °C), hydrothermal reactions can be used to prepare hydrochar with fresh biomass (i.e., banana peels and pomelo peels) as raw materials. 18 Banana peels, as a typical fruit residue, have become a popular bio-waste. Due to the large population in China, banana production is more than 12.1 million tons annually, making China the second largest banana producer in the world.…”

Section: ■ Introductionmentioning

confidence: 99%

Highly Efficient Removal of Lead/Cadmium by Phosphoric Acid-Modified Hydrochar Prepared from Fresh Banana Peels: Adsorption Mechanisms and Environmental Application

Tian

Wang

et al. 2022

Langmuir

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In this work, a phosphoric acid (H3PO4)-modified hydrochar (BPH200) was prepared at a low temperature (200 °C) in an air atmosphere with fresh banana peels as the raw material. The Cd2+ and Pb2+ adsorption behaviors and mechanisms of BPH200 were explored. As the temperature rose, co-hydrothermal carbonization of the banana peels and H3PO4 enhanced the transformation of phosphorus (P) species. More orthophosphate and metaphosphate were found in BPH200 than in banana peel hydrochar (BP) without modification. The adsorption kinetics for Cd2+ and Pb2+ followed the pseudo-second-order model. The Redlich-Peterson model best fit the experimental results of the adsorption isotherm, with maximum adsorption capacities of 84.25 and 237.90 mg·g–1 for Cd2+ and Pb2+, respectively. H3PO4 promoted Cd2+ and Pb2+ adsorption by forming precipitates, which, respectively, accounted for 32.75 and 41.12% of the total adsorption onto BPH200. In addition, the cation-exchange capacities of BPH200 with Cd2+ and Pb2+ were weakened compared with those of BP. However, complexation with these two ions strengthened, accounting for 26.68 and 32.81%, respectively, of the total adsorption capacity. This indicated that the adsorption of Cd2+ and Pb2+ onto BPH200 was dominated by precipitation with minerals and complexation with oxygen-containing functional groups. The removal rates of Cd2+ and Pb2+ by BPH200 from different water bodies were more than 99.95 and 99.97%, respectively. The addition of BPH200 also decreased the amounts of bioavailable Cd2+ and Pb2+ in the soil, resulting in relatively high immobilization rates of Cd2+ (67.13%) and Pb2+ (70.07%).

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“…Organic acids produced by plant roots can activate heavy metals in soil, which are more easily absorbed by roots (Zhang et al 2020). At the same time, organic acids can also chelate with heavy metals in soil, x heavy metals in roots, and inhibit heavy metal transport (Chu et al 2021). Compared with BC3, the Cu content in the underground part for cases BC1 and BC2 greatly increased.…”

Section: Effect On Soil Available Potassiummentioning

confidence: 99%

Fate and health risk assessment of heavy metals in Brassica chinensis L. (pak-choi) and soil amended by sludge-based biochar

Zhang

Bai

et al. 2022

Environ Sci Pollut Res

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Biochar is widely used in agriculture to e ciently solve the problem of sludge. In this study, sludge-based biochar (referred to as BC1, BC2, and BC3) was prepared by mixing sludge with FeCl 3 , Na 2 SiO 3 , and Ca (H 2 PO 4 ) 2 , respectively. Then, it was mixed with fresh soil to plant Brassica chinensis L. The analysis of the effects of the three biochar types showed that all of them were bene cial to the growth of Brassica chinensis L. We added the biochar to the soil and found that the concentration of heavy metals did not exceed the recommended threshold. Additionally, the aboveground part of Brassica chinensis L. met the standard requirement for food safety (GB2762-2017). Notably, BC3 stood out with the best effect on the growth of Brassica chinensis L. and resulted in the improvement of the physical and chemical properties of soil such as ammonium nitrogen, available phosphorus, and available potassium (BC3 was followed by BC2 and BC1). BC3 could e ciently inhibit the migration of heavy metals, thereby reducing the overall heavy metal pollution level and ameliorating the soil nutrients. BC3 could increase the organic carbon by 258.92%, available phosphorus by 234.45%, and available potassium by 37.12% compared with the CK group. The THQ and TTHQ estimates of Brassica chinensis L. were lower than one, indicating that the health risk of heavy metal intake was not prominent. Additionally, the application of the proposed biochar could reduce the form of F1 (acid extracted state) and increase the form of F4 (residue state) in soil. Overall, we conclude that the application of the proposed biochar can promote the root absorption of heavy metals and inhibit the migration of heavy metals.

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Hydrothermal carbonization of microalgae for phosphorus recycling from wastewater to crop-soil systems as slow-release fertilizers

Cited by 50 publications

References 62 publications

Mitigating antibiotic pollution using cyanobacteria: Removal efficiency, pathways and metabolism

Mitigating antibiotic pollution using cyanobacteria: Removal efficiency, pathways and metabolism

Highly Efficient Removal of Lead/Cadmium by Phosphoric Acid-Modified Hydrochar Prepared from Fresh Banana Peels: Adsorption Mechanisms and Environmental Application

Fate and health risk assessment of heavy metals in Brassica chinensis L. (pak-choi) and soil amended by sludge-based biochar

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