Biochar-based geopolymer nanocomposite for COD and phenol removal from agro-industrial biorefinery wastewater: Kinetic modelling, microbial community, and optimization by response surface methodology

Chemosphere, Год журнала: 2023, Номер 339, С. 139620 - 139620

Опубликована: Июль 29, 2023

Язык: Английский

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Characterization and invitro toxicity assay of bio-reduced hexavalent chromium by Acinetobacter sp. isolated from tannery effluent

Case Studies in Chemical and Environmental Engineering, Год журнала: 2023, Номер 8, С. 100459 - 100459

Опубликована: Авг. 15, 2023

Chromium, a transition metal element widely distributed in the earth's crust, with valence from −2 to +6, but exists mainly form of trivalent and hexavalent states. Hexavalent chromium Chromium (VI) is often found soil ground water due its widespread industrial use such as tannery, electroplating, steel industries. toxic, mutagenic, carcinogenic, teratogenic much more toxic many plants, animals, bacteria inhabiting aquatic environments because it motile, highly soluble strong oxidizing agent that causes severe damage cell membranes while Cr (III) most stable relatively immobile system lower solubility. This study therefore, aims at identifying bacterium can reduce (IV) using pour plate technique on Luria Bertani medium amended K2Cr2O7. Graphs tables were used for data analysis. The effects incubation time, pH, temperature, inoculum size, potassium dichromate (K2Cr2O7) concentration then examined characterize based one factor time. To assess reduction, spectrophotometric 1, 5-diphenyl carbazide test (DPC) 370 nm was utilized. By molecular phylogenetic analysis partial 16s ribosomal RNA analysis, isolate be Acinetobacter sp. strain BUK_BCH_BTE 5. findings demonstrated tryptic soy broth (TSB), an optimal K2Cr2O7 level 200 mg/L, pH 6.5, 35 °C size 2%, well time 48 h, successful approach decreasing (VI). Following Nickel (Ni), withstand highest doses Lead (Pb), Mercury (Hg), Zink (Zn), Iron (Fe), Cadmium (Cd), Arsenic (As), Cupper, order. A reduced culture's (supernatant) larvacidal bioassay showed 30% decrease toxicity just hours, indicating promising candidate, reduction method less dangerous decontaminating chromium-contaminated environments.

Язык: Английский

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Dyes-decolorizing potential of fungi strain BUK_BCH_BTE1 locally isolated from textile industry effluents: Characterization and LC-MS analysis of the metabolites

Case Studies in Chemical and Environmental Engineering, Год журнала: 2023, Номер 8, С. 100453 - 100453

Опубликована: Авг. 12, 2023

Textile industry wastewater contains azo dye leftovers, which have a deleterious impact on most environmental systems. Because of safety and cost considerations, biological waste treatment is the best alternative. The goal study was to isolate characterized fungus that could decolorize use (Congo red) as single carbon source. After serial dilution mineral salt media, isolated using pour plating procedure. Based gene sequencing ITS1 ITS2 ribosomal RNA region molecular phylogenetic analysis strain identified Aspergillus quadrilineatus with accession number OK178927. Temperature, pH, substrate concentration, incubation period, inoculum size, influence interacting heavy metals in Mineral Salt Medium were all investigated during characterization process Congo red used sole This fungal grew decolorized at 400 μɡ/ml 30 °C temperature, 5.0 an size 200 μL, 72-h time. shown withstand up 6 ppm Zink (Zn), Chromium (Cr), Cupper (Cu), Iron (Fe) Arsenic (Ar) showing inhibition. Comparing red's metabolites standard database organic substances. LC/MS analyses intermediate compounds produced decolorization revealed formation Isamine blue, p-bromo-N-(2-naphthyl)-benzenesulfonamide, 4-acetomido-N,N-dicyclohexyl-3-nitrobenzene, azobenzene-2-sulfenyl bromide biodegradation red. might be good candidate for bioremediation.

Язык: Английский

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Hyperparameter optimization of YOLOv8 for smoke and wildfire detection: Implications for agricultural and environmental safety

Artificial Intelligence in Agriculture, Год журнала: 2024, Номер 12, С. 109 - 126

Опубликована: Май 31, 2024

In this study, we extensively evaluated the viability of state-of-the-art YOLOv8 architecture for object detection tasks, specifically tailored smoke and wildfire identification with a focus on agricultural environmental safety. All available versions were initially fine-tuned domain-specific dataset that included variety scenarios, crucial comprehensive monitoring. The 'large' version (YOLOv8l) was selected further hyperparameter tuning based its performance metrics. This model underwent detailed optimization using One Factor At Time (OFAT) methodology, concentrating key parameters such as learning rate, batch size, weight decay, epochs, optimizer. Insights from OFAT study used to define search spaces subsequent Random Search (RS). final derived RS demonstrated significant improvements over initial model, increasing overall precision by 1.39 %, recall 1.48 F1-score 1.44 [email protected] 0.70 protected]:0.95 5.09 %. We validated enhanced model's efficacy diverse set real-world images, reflecting various settings, confirm robustness in detecting fire. These results underscore reliability effectiveness scenarios critical safety work, representing advancement field fire through machine learning, lays strong foundation future research solutions aimed at safeguarding areas natural environments.

Язык: Английский

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Palm oil mill effluent degradation by a novel strain of Bacillus sp. isolated from contaminated environment

Case Studies in Chemical and Environmental Engineering, Год журнала: 2024, Номер 9, С. 100637 - 100637

Опубликована: Янв. 29, 2024

Palm oil mill effluent (POME) has a high concentration of organic matter and total suspended solids. However, improper disposal refining wastes containing oils, fats, sludge can cause environmental damage harm human health due to their toxic, carcinogenic, polluting effects. This research was carried out solve the harmful effects caused by release POME environment. The goal this study isolate naturally occurring bacterium that could degrade use it as single carbon source. Bacteria were isolated from POME-contaminated medium using an enrichment technique. Judging 16S rRNA partial gene sequencing, morphological, biochemical, molecular identification methods, bacteria identified novel Bacillus sp. substrate concentration, inoculum size, pH, temperature, incubation time on bacterial growth investigated "one factor at time" (OFAT) approach. optimal conditions for bacterium's found be pH 7.5, 35 °C, 20 % v/v 6 96 hours incubation. is capable reducing 84 COD 91 BOD sample. degradation potential suggests used good option bioremediation POME-polluted areas.

Язык: Английский

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Mitigating water contamination by controlling anthropogenic activities of organochlorine pesticides (OCPs) for surface water quality assurance

Case Studies in Chemical and Environmental Engineering, Год журнала: 2023, Номер 8, С. 100474 - 100474

Опубликована: Авг. 28, 2023

Organochlorine pesticides (OCPs) have wide applications in agriculture, industry, and domestic uses. Unfortunately, they are resistant to photolytic biodegradation exist for a very long time the environment. Their bioaccumulation humans aquatic biota could lead severe problems. In this study, surface water samples were collected from four sampling points along Okura River Eastern Senatorial District of Kogi State, Nigeria. They extracted with methylene chloride, reduced small volume using rotatory evaporator, subjected clean-up, analyzed gas chromatography mass spectrometry (GC-MS). The results show that level OCPs SP1, SP2, SP3 SP4 between ND - 0.1357 ± 6.3 × 10−5 mg/L, 0.0767 1.3 10−3, 0.046 7.5 10−4, 0.0211 2.6 10−3 respectively. health risk assessment was evaluated United States Environmental Protection Agency (USEPA) methods hazard quotient (HQ), average daily dose (ADD) cancer (CR). HQ, ADD CR less than USEPA recommended permissible limit 1, 10−4 10−6 Therefore, there is no risk. However, concentrations analytes detected slightly above standard maximum 100 ng/L. all anthropogenic activities disposal agrochemical wastes into should be controlled, provision quality inhabitants river.

Язык: Английский

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Biodegradation potential of 2,4 dichlorophenoxyacetic acid by Cupriavidus campinensis isolated from rice farm cultivated soil

Case Studies in Chemical and Environmental Engineering, Год журнала: 2023, Номер 8, С. 100434 - 100434

Опубликована: Июль 29, 2023

This study was carried out for nine months to find bacterial strain capable of mineralizing 2,4-dichlorophenoxyacetic acid herbicide. A popular pre-/post emergent systemic herbicide known as 2, 4-dichlorophenoxyacetic Acid (2,4-D) is used combat broad-leaved weeds and other plants on rangelands that are specifically intended boost agricultural productivity reduce losses the result crop pests products. study's objective isolate, screen, identify degrading microorganisms from rice-growing soil in Kura local government area, Kano State. Experiments with incubation mineral broth allowed isolation bacteria. added salt medium. native can use its only source carbon energy found a rice field lengthy history use. All experiments were triplicates. Additionally, employed data display graphs tables. An indigenous supplementation minimal medium isolated using main alternative Rice cultivated lands. The named B3-BUK-BCH recognized Cupriavidus campinensis based analysis sequence 16S ribosomal RNA, morphological, chemical features. mineralization features quantified one factor at time approach. optimal conditions degradation follows: pH 7, temperature 40 °C, 200 gL−1inoculum size, 0.72 gL−1 2,4-D concentration. High-performance liquid chromatography (HPLC) test 2,4-D's propensity degradation. Under ideal circumstances, up 94.69% degraded after 6 days incubation, this isolate had never been reported able degrade available literature area. represents great potential bioremediation.

Язык: Английский

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Agricultural Wastewater Treatment Using Oil Palm Waste Activated Hydrochar for Reuse in Plant Irrigation: Synthesis, Characterization, and Process Optimization

Agriculture, Год журнала: 2023, Номер 13(8), С. 1531 - 1531

Опубликована: Авг. 1, 2023

The best possible use of natural resources and the large amounts trash produced by industrial human activity is necessary for sustainable development. Due to threat global climate change other environmental challenges, waste management systems are changing, leading more instances water resource management. generated must be controlled from a sustainability point view. Typically, conventional disposal Agricultural Wastewater (AW) biomass can achieved recycling, reusing, converting them into variety green products. To improve AW quality purposes sustainability, Sustainable Development Goals (SDGs) 6 14, dealing with clean water, sanitation, life below very important goals. Therefore, present investigation evaluates effectiveness Bench-scale Activated Sludge Reactor (BASR) system treatment. BASR was designed focus on getting maximum utilization out biosorbent derived oil palm activated hydrochar (OPAH). This in accordance SDG 9, which targets inorganic organic added value. An experiment developed using Response Surface Methodology (RSM). A Hydraulic Retention Time (HRT) 1–3 days used bioreactor’s setup operation, Mixed Liquor Suspended Solids (MLSS) concentrations 4000–6000 mg/L were used. fed initial mean 4486 ± 5.63 6649 3.48 five-day Biochemical Oxygen Demand (BOD5) Chemical (COD) experiments, respectively. results obtained showed that reductions 84.66% 72.07% recorded BOD5 COD, Through RSM optimization, greatest materials 2-day HRT an MLSS dosage 5000 mg/L. Substrate elimination thresholds assessed first-order, Grau second-order, modified Stover–Kincannon models. reported observations found perfectly fit model, high R2 values 0.9908 0.9931 As result, model may design forecast how reactor would behave. findings this study suggest OPAH has promising potential applied as eco-friendly material removal COD AW. Consequently, additionally possess ability address SDGs 6, order fulfil United Nations (UN) goals through 2030.

Язык: Английский

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Phenol biodegradation by Acinetobacter baumanii and Citrobacter sedlakii isolated from petroleum products contaminated environment

Case Studies in Chemical and Environmental Engineering, Год журнала: 2023, Номер 8, С. 100468 - 100468

Опубликована: Авг. 19, 2023

Phenol and phenolic compounds are common environmental contaminants in textile, petrochemical, pharmaceutical; oil, food industries this can cause a vital threat to the environment. This contaminant is readily absorbed when it encounters skin or respiratory system may lead serious itching, be lethal if swallowed. The exposure excessive phenol inside human body has detrimental effects on system, slows growth. aim of research investigate degrading ability bacteria petroleum products contaminated environment using high performance liquid chromatography. In investigation, microorganisms having potential biodegrade were isolated from petroleum-contaminated locations. strains identified as Citrobacter sedlakii strain NWPK with accession no. MW720666 Acinetobacter baumanii NWPKD MW720652 based molecular analysis achieved via 16S rRNA sequence phylogenetic found degrade efficiently sole carbon energy source. After 6 days incubation MSM media, isolates tested for growth optical density at various concentrations phenol. While densities NWPKD, respectively, vary 0.02 0.06 0.03–0.05 500 1000 mg/L content. However, cultivated because they utilized their exclusive When compared isolate showed strongest biodegradation capacity, consuming 86.46% 87.94% Because capacity consume substance, investigation demonstrated that two employed bioremediation environments have been

Язык: Английский

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Degradation of used engine oil by alcaligenes sp. strain isolated from oil contaminated site: Isolation, identification, and optimization of the growth parameters

Case Studies in Chemical and Environmental Engineering, Год журнала: 2023, Номер 8, С. 100516 - 100516

Опубликована: Окт. 9, 2023

Язык: Английский

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