Publications by authors named "Farhan Hafeez"

Pakistan, like many other regions around the world, is experiencing the impacts of climate change, particularly in its northern region. These changes have adverse impacts on ecosystems and biodiversity. Herein, we have investigated future projections of temperature and precipitation trends for three periods historical (HT = 1975-2005), near-term (NT = 2010-2029), and mid-term (MT = 2030-2050) using climate model intercomparison projects along with global climate models (GCMs) including RCP4.

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Biochar is widely acknowledged for its remarkable impact on soil conditioning. However, the influence of different sources of biochar, particularly anaerobic digested sludge biochar (ADBC) derived from anaerobic digested sludge and biochar derived from waste activated sludge, on alkaline soil remains largely unexplored. To address this knowledge gap, a comprehensive field experiment was conducted over a period of 180 days to investigate the effects of ADBC on slightly alkaline soil.

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Land use has a great impact on soil dynamics. The soils of various land use systems in Central Karakoram have been under immense pressure in the recent past due to certain anthropogenic activities such as land use practices and land use cover changes. These influences have an impact on the spatial distribution of metallic elements (MEs) in the soils of various land uses.

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Terrestrial ecosystems are under the enormous pressure of land use management regimes through human disturbances, resulting in the disruption of biogeochemical cycles and associated ecosystem services. Nitrogen (N) in soil ecosystems is of vital importance for primary productivity, hence estimating the extent of these human interventions on N-cycling processes becomes imperative from economic and environmental perspectives. This work investigated the impacts of variable anthropogenic activities on N cycling in three different terrestrial ecosystems (arable, grassland, and forest) in three regions of lower Himalaya, Pakistan.

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Graphene quantum dots (GQDs), a new solid-state electron transfer material was anchored to nitrogen-doped TiO via sol gel method. The introduction of GQDs effectively extended light absorption of TiO from UV to visible region. GQD-N-TiO demonstrated lower PL intensity at excitation wavelengths of 320 to 450 nm confirming enhanced exciton lifespan.

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Article Synopsis
  • Microalgae-based wastewater treatment systems show promise in reducing antibiotic resistance genes (ARGs) in municipal wastewater, with specific microalgae strains more effective than mixed cultures.
  • The study tracked 14 ARGs and found significant reductions in key genes within the first four days, highlighting correlations between specific ARGs and water quality parameters like total dissolved solids (TDS) and total suspended solids (TSS).
  • The research suggests that certain water quality indicators, particularly TDS and E. coli levels, can serve as cost-effective measures for monitoring ARG mitigation in wastewater treatment processes.
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Microalgal biomass provides a renewable source of biofuels and other green products. However, in order to realize economically viable microalgal biorefinery, strategic identification and utilization of suitable microalgal feedstock is fundamental. Here, a multi-step suboptimal screening strategy was used to target promising microalgae strains from selected freshwaters of the study area.

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  • - The study focuses on creating nanocomposites using Eleocharis dulcis biochar combined with nano zero-valent copper and magnetite nanoparticles to effectively remove the dye Congo Red from water.
  • - Various experimental conditions, such as dosage, pH, and initial dye concentration, were analyzed, revealing that the modified materials (nZVCu/EDB and MNPs/EDB) performed significantly better in removing Congo Red compared to the unmodified biochar.
  • - The adsorption efficiency showed promising results in both batch and column tests, indicating that these nanocomposite materials could be a viable method for decontaminating water that contains Congo Red dye.
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Both cancer and diabetes mellitus are serious health issues, accounting more than 11 million deaths worldwide annually. Targeted use of plant-mediated nanoparticles (NPs) in treatment of ailments has outstanding results due to their salient properties. The current study was designed to investigate the safe production of silver nanoparticles (AgNPs) from Acacia nilotica.

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The wheat plant requires elevated phosphorus levels for its normal growth and yield, but continuously depleting non-renewable phosphorus reserves in the soil is one of the biggest challenges in agricultural production worldwide. The () gene has been reported to play a key role in efficient P uptake, deeper rooting, and high yield in rice. However, the function of the gene in wheat is still unclear.

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Giant reed () has proved to be effective in detoxification, accumulation and tolerance of toxic metals. The present study explored the stress response of giant reed against Cu and Ni stress. The effect of metal stress was studied on dry weight, chlorophyll pigments antioxidant enzymes production and selected genes expression.

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  • Flood events worldwide are harming soil health, leading to food security issues, and this study examines their effects on heavy metals and nutrients in soil at three sites in Punjab, Pakistan.
  • The research found that flooding altered the concentrations of certain heavy metals like Cadmium and lead, while nutrients like phosphorous and nitrates decreased after flood events, suggesting that flooding changes soil composition.
  • The study highlights that despite low contamination levels currently, regular floods could escalate pollution and jeopardize agricultural productivity in the affected areas.
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Due to increasing demand of P fertilizers and gradual decrease in P resources, recyclable P is the focus of researchers in recent years. Sewage sludge (SS) is a municipal waste that contains appreciable amounts of P and probably other nutrients. In present study, the effects of various SS and their biochars (450 °C for 2 h) were investigated on soil properties and P uptake in wheat (Triticum aestivum) with and without P fertilizer.

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Cadmium (Cd)-contamination of agricultural soils has been receiving attention worldwide due to its entry into food crops such as wheat (Triticum aestivum L.). Little is known regarding the use of organic carbon (OC) sources in alleviating Cd toxicity in cereals.

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Drought and salt stress negatively affect soil fertility and plant growth. Application of biochar, carbon-rich material developed from combustion of biomass under no or limited oxygen supply, ameliorates the negative effects of drought and salt stress on plants. The biochar application increased the plant growth, biomass, and yield under either drought and/or salt stress and also increased photosynthesis, nutrient uptake, and modified gas exchange characteristics in drought and salt-stressed plants.

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Cadmium (Cd) is one of the main pollutants in paddy fields, and its accumulation in rice (Oryza sativa L.) and subsequent transfer to food chain is a global environmental issue. This paper reviews the toxic effects, tolerance mechanisms, and management of Cd in a rice paddy.

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The worldwide rising energy demands and the concerns about the sustainability of fossil fuels have led to the search for some low-cost renewable fuels. In this scenario, the production of biodiesel from various vegetable and animal sources has attracted worldwide attention. The present study was conducted to evaluate the production of biodiesel from the oil industry waste following base-catalysed transesterification.

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  • Technosol construction, which uses treated soil and recycled materials, is a promising method for restoring degraded land and reusing industrial waste.
  • Recent research highlights that while Technosols can facilitate primary production, there’s limited knowledge about their role in nutrient cycling.
  • The study found that microbial activity related to nitrogen cycling varies with soil depth and composition, indicating that microbes play a crucial role in nitrification processes in Technosols, emphasizing the need for deeper understanding of these communities to enhance nutrient cycling.
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