Use of biochar as a low-cost adsorbent for removal of heavy metals from water and wastewater: A review

Journal of environmental chemical engineering, Journal Year: 2023, Volume and Issue: 11(5), P. 110986 - 110986

Published: Sept. 9, 2023

Language: Английский

---

Harnessing the power of functionalized biochar: progress, challenges, and future perspectives in energy, water treatment, and environmental sustainability

Biochar, Journal Year: 2024, Volume and Issue: 6(1)

Published: March 14, 2024

Abstract The swift advancement of sustainable energy technologies, coupled with the urgent need to address environmental challenges, has generated considerable interest in multifaceted applications biochar materials promote energy, water, and sustainability. This comprehensive review examines recent advancements production functionalized materials, emphasizing their pivotal roles conversion storage, wastewater treatment, CO 2 reduction, soil amelioration, promotion carbon neutrality within a circular economy framework. functionalization involves surface chemistry porosity modifications, achieved through techniques like templating, chemical activation, metal impregnation, or heteroatom doping. These modifications substantially enhance catalytic activity, storage capacity, cycling stability making them particularly effective diverse such as water splitting, fuel cells, supercapacitors. Additionally, demonstrate remarkable efficacy catalysts adsorbents proficiently removing pollutants heavy metals, organic contaminants, nutrients, thereby facilitating resource recovery from wastewater. also underscores potential capture conversion, exploring innovative strategies augment adsorption capacity state-of-the-art processes for transforming captured into valuable fuels chemicals. In summary, this offers insights research, underscoring its substantial commercial versatile material contributing cleaner more future. Article Highlights current status research is comprehensively reviewed. fields critically examined. Technology readiness levels (TRLs) various biochar-based technologies are evaluated. Graphical

Language: Английский

---

The immobilization and adsorption mechanisms of agro-waste based biochar: A review on the effectiveness of pyrolytic temperatures on heavy metal removal

Environmental Chemistry and Ecotoxicology, Journal Year: 2024, Volume and Issue: 6, P. 92 - 103

Published: Jan. 1, 2024

The multifunctional properties of biochar make it a promising adsorbent heavy metals for environmental bioremediation. Pyrolytic temperature is key factor that impacts the properties, performance, and mechanisms agro-wastes-derived because physiochemical transformation its structural composition. It has been deliberated increased pyrolysis temperatures strongly enhance specific surface area, pH, high microporosity as well carbon ash content with low cation exchange capacity volatiles content. reason different from related to variations in lignin-cellulose structures moistures agro-waste biomasses. Biochar considered low-cost material shown convenient applicability rural areas developing countries where contamination emerging. A wide range pyrolytic distinctive characteristics biomass their capacities remove metals. Higher can exhibit higher areas, enhanced functional groups, stability than modified biochar. Different exhibited diverse adsorption on such rice husk corncob, efficiency increases selective hexavalent chromium [Cr(VI)], cadmium [Cd(II)] zinc [Zn(II)]. This review aimed understand pristine bioremediation biomasses obtained decision making process production costs. authors propose future investigations metal immobilization unlock full potential

Language: Английский

---

Advances in sewage sludge application and treatment: Process integration of plasma pyrolysis and anaerobic digestion with the resource recovery

Heliyon, Journal Year: 2023, Volume and Issue: 9(9), P. e19765 - e19765

Published: Sept. 1, 2023

Sewage sludge (SS) is an environmental issue due to its high organic content and ability release hazardous substances. Most of the treatments available are biological, thermal hydrolysis, mechanical (ultrasound, pressure, lysis), chemical with oxidation (mainly ozonation), alkali pre-treatments. Other treatment methods include landfill, wet oxidation, composting, drying, stabilization, incineration, pyrolysis, carbonization, liquefaction, gasification, torrefaction. Some these SS disposal damage ecosystem underutilize potential resource value SS. These challenges must be overcome innovative technique for improvement SS's nutritional value, energy content, usability. This review proposes plasma pyrolysis anaerobic digestion (AD) as promising technologies. Plasma pre-treats make it digestible by AD bacteria immobilizes heavy metals. The addition Char upstream process increases quantity quality biogas produced while enhancing nutrients in digestate. two processes integrated at temperatures, thus creating concerns about their demand. offset generated that can run plant or sold grid, generating additional cash. wastes also converted into biochar, fertilizer, soil conditioner. combined technologies' financial sustainability depends on facility's circumstances location. treat sustainably provide resources. paper explains co-process route's techno-economic prospects, challenges, recommendations future application valorization recovery.

Language: Английский

---

Zeolites in wastewater treatment: A comprehensive review on scientometric analysis, adsorption mechanisms, and future prospects

Environmental Research, Journal Year: 2024, Volume and Issue: 260, P. 119782 - 119782

Published: Aug. 12, 2024

Language: Английский

---

Unravelling the influence of surface functional groups and surface charge on heavy metal adsorption onto carbonaceous materials: An in-depth DFT study

Materials Today Communications, Journal Year: 2024, Volume and Issue: 39, P. 108647 - 108647

Published: March 16, 2024

Language: Английский

---

Machine learning (ML): An emerging tool to access the production and application of biochar in the treatment of contaminated water and wastewater

Groundwater for Sustainable Development, Journal Year: 2024, Volume and Issue: 26, P. 101243 - 101243

Published: June 17, 2024

Language: Английский

---

Biosorption of aqueous Pb(II) by H3PO4-activated biochar prepared from palm kernel shells (PKS)

Heliyon, Journal Year: 2023, Volume and Issue: 9(7), P. e17250 - e17250

Published: July 1, 2023

The conversion of palm kernel shells (PKS), a major agricultural waste from the oil sector, into potentially high-value biosorbent for heavy metals-contaminated wastewater treatments was explored in this work. Following carbonization, activated PKS chemically by soaking biochar phosphoric acid (H3PO4) solution at 25 °C. low-temperature approach benefits less dangerous fume production and operational challenges when compared to high-temperature procedure. properties were characterized BET, FTIR, SEM. effects H3PO4 dosage, initial Pb(II) concentration, adsorbent dosage on removing synthetic investigated adsorption study. activation with high concentrations led enhanced removal efficiency. pseudo-second-order (PSO) kinetic model fitted experimental data well (R2 0.99), indicating that chemisorption likely involved onto PKS. sorption possibly promoted presence phosphate moieties surface. Langmuir isotherm best described 0.97), giving calculated maximum capacity (qm) 171.1 μg/g. In addition physical sorption, possible mechanisms included functional group complexation surface precipitation. Overall, activating room temperature could be promising technique improve adsorbent's efficiency wastewater.

Language: Английский

---

Overview of integrated electrocoagulation-adsorption strategies for the removal of heavy metal pollutants from wastewater

Discover Chemical Engineering, Journal Year: 2024, Volume and Issue: 4(1)

Published: June 24, 2024

Abstract Removal of heavy metal pollutants from wastewater is critical for preserving a clean environmental setting and guaranteeing universal well-being. Physical, chemical, biological approaches have been devised the removal metals various sources. Methods used include electrocoagulation (EC) adsorption (AD). Although both methods are reported to be efficiently applied in treatment, EC method impeded by high energy consumption, particularly when treating concentrated effluents, as it demands substantial current coagulant formation. Alternatively, AD process hindered adsorbent saturation competitive effects specific chemicals. Here, we only found limited studies on integrated EC-AD combined process, where were either separate or system vessels augment efficiency ions synthetic solutions. It imperative conduct more synergistic that combine with other treatment address limits optimize processes. The review identified density, pH, time, temperature, dosages factors influencing wastewater. has explored several which confined limiting their relevance real-world scenarios. Therefore, this proposes development design technologies exploit strengths minimize associated limitations. Overall, strategies proved effective economical compared individual methods.

Language: Английский

---

Hydrogel microbial reactor based on microbially induced calcium precipitation for the removal of calcium, cadmium and nitrate from groundwater

Journal of environmental chemical engineering, Journal Year: 2023, Volume and Issue: 11(3), P. 109867 - 109867

Published: April 5, 2023

Language: Английский

---