Harmful algal blooms (HABs) are growing threats that cause tens of billion dollars economic loss annually. Aiming at efficient disposal of HABs, a cheap and eco-friendly cationic straw was developed by etherification of wheat straw, which replaced hydroxyl groups on cellulose by quaternary ammonium groups. It endowed the cationic straw with high positive charge and achieved 93.92% of harvesting efficiency by enhancing HABs cells aggregation via charge neutralization. Different from inorganic salts-based flocculants, HABs harvesting by the cationic straw is a spontaneous and exothermic process with negative ΔG° and ΔH° under all adsorption conditions. Thermodynamics and kinetics analysis elucidated that HABs adsorption process by cationic straw were mainly driven by physical forces. Together, cationic straw preparation and HABs harvesting processes were comprehensively optimized with orthogonal experiments. The work may inspire cost-effective HABs disposal and fill knowledge gaps of process nature for HABs harvesting.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.biortech.2022.127737 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Response characteristics of soil Cd availability to microbes in paddy soil with long-term fertilization and its impact on Cd uptake in rice.
Sci Total Environ
December 2024
College of Agronomy, Hunan Agricultural University, Changsha 410128, China. Electronic address:
Long-term fertilization contributes to the accumulation of cadmium (Cd) in soils and crops, yet the effects of different fertilization regimes on soil Cd dynamics and its uptake in rice remain poorly understood. This long-term field experiment aimed to elucidate how different fertilization regimes influence Cd bioavailability and mobility in soil, thereby affecting Cd accumulation in rice. Four fertilization treatments were tested, including chemical fertilizer (CF), rice straw incorporation (RF), and low (LM) and high (HM) rates of manure fertilizers.
View Article and Find Full Text PDFMobility of biochar-derived dissolved organic matter and its effects on sulfamerazine transport through saturated soil porous media.
Environ Sci Process Impacts
December 2024
College of Hydraulic Science and Engineering, Yangzhou University, Yangzhou, 225009, P. R. China.
Dissolved organic matter (DOM) released from biochar may impact antibiotic mobility and environmental fate in subsurface environments. Here, DOM samples derived from biochars (BDOM) generated by pyrolyzing corn straw at 300, 450, and 600 °C were employed to elucidate the mobility characteristics of these organic substances and their influences on the transport of sulfamerazine (SMZ, a typical sulfonamide antibiotic) in soil porous media. The results demonstrated that BDOM produced at a lower pyrolysis temperature exhibited greater mobility owing to the weaker hydrophobic and H-bonding interactions between BDOM and soil particles.
View Article and Find Full Text PDFSynthesis of (FeCoNiCuMn)O spinel-high entropy oxide and green carbon from agricultural waste for supercapacitor application.
RSC Adv
October 2024
School of Environmental Science and Engineering, Indian Institute of Technology Kharagpur West Bengal India.
This article highlights (FeCoNiCuMn)O high-entropy oxide prepared liquid state induction melting techniques for supercapacitor application. Nanostructured high entropy oxides have higher active sites to boost the surface redox process with transition metal cations, such as Fe, Mn, Ni, Co, and Cu, which helps to improve specific power, long-term cyclic stability, and specific capacitance. Melted and ball-milled HEA Nps were annealed to form the high entropy oxide, which uses a positive electrode for supercapacitor application; this results in the highest specific capacitance of 313 F g for a current rate of 5 mV s for the optimized 3 M KOH electrolyte.
View Article and Find Full Text PDFPaddy straw biochar amended sediment enhances pond productivity, growth and physiological profile of Penaeus vannamei cultured in inland saline nursery ponds.
Environ Sci Pollut Res Int
November 2024
Aquatic Environment and Health Management Division, ICAR- Central Institute of Fisheries Education, Mumbai, India.
The growing interest in commercial Inland saline aquaculture has taken momentum across the globe due to the available technologies for aquaculture and the abundant resources of saline groundwater. However, the critical problems in inland saline ponds are degraded soil and imbalanced or deficient nutrients. To address these issues, a 75-day experiment was conducted to explore the effects of Paddy Straw Biochar (PSB) as a sediment amendment on sediment quality, water characteristics, growth parameters, and the well-being of Penaeus vannamei reared in inland saline environments.
View Article and Find Full Text PDFEngineered biochars for simultaneous immobilization of as and Cd in soil: Field evidence.
J Environ Manage
November 2024
Guizhou Institute of Water Resources Science, Guiyang, Guizhou 550002, China.
Article Synopsis
- Agricultural soil contamination with toxic elements, particularly arsenic and cadmium, is a significant threat to food security, requiring effective remediation methods.
- A study explored the use of biochar derived from cow manure, rice straw, and pine wood, modified with substances like ferric chloride and potassium permanganate, to enhance the immobilization of these contaminants in soils.
- Results indicated that modified biochars, especially those treated with potassium permanganate, significantly reduced the bioavailability of cadmium and arsenic, while impacting soil respiration and nutrient dynamics positively.
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!