Sardar Khan

Sardar Khan
University of Peshawar · Department of Environmental Sciences

PhD, postdoc

About

209
Publications
109,523
Reads
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13,193
Citations
Citations since 2016
120 Research Items
11087 Citations
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201620172018201920202021202205001,0001,5002,000
201620172018201920202021202205001,0001,5002,000
Additional affiliations
June 2014 - present
University of Peshawar
Position
  • Professor (Full)
June 2010 - August 2013
Chinese Academy of Sciences
Position
  • Young International Scientist
Description
  • Conducted research on environmental and agronomic benefits of biochar
March 2009 - June 2014
University of Peshawar
Position
  • Professor (Associate)

Publications

Publications (209)
Article
Full-text available
This study investigates the heavy metals concentration in soils derived from mafic and ultramafic rocks of the Kot Parang Ghar mélange zone in the Bucha Area, Mohmand Agency, Pakistan. Furthermore, plant species grown on these soils are assessed for their bioaccumulation ability. Representative samples (soil and plants) were collected and analyzed...
Data
Full-text available
This study investigates the wild plant species for their phytoremediation potential of macro and trace metals (MTM). For this purpose, soil and wild plant species samples were collected along mafic and ultramafic terrain in the Jijal, Dubair, and Alpuri areas of Kohistan region, northern Pakistan. These samples were analyzed for the concentrations...
Article
Biochar addition to soil has been proposed to improve plant growth by increasing soil fertility, minimizing bioaccumulation of toxic metal(liod) sand mitigating climate change. Sewage sludge (SS) is an attractive, though potentially problematic, feedstock of biochar. It is attractive because of its large abundance; however, it contains elevated con...
Article
Full-text available
The influence of sewage sludge (SS) and sewage sludge biochar (SSBC) upon biomass yield and the bioaccumulation of PAHs into lettuce plants grown in contaminated soil (∑16PAH 20.2 ± 0.9 mg kg(-1)) is presented. All SSBC amendments (2, 5 and 10%) and the 2% SS amendment significantly (P < 0.01) increased lettuce biomass. Both SS and SSBC amendments...
Article
Full-text available
Groundwater is the drinking water source for the majority of rural settlements of district Nowshera, Khyber Pakhtunkhwa, Pakistan. The study aimed to analyze the groundwater quality and its vulnerability to pollution and to develop its spatial distribution mapping. For this purpose, forty-eight groundwater samples were collected from dug wells, tub...
Article
Full-text available
The present study aimed to investigate the physicochemical parameters, potentially toxic elements (PTEs) and Escherichia coli (E. coli) contamination with associated health risks in drinking water sources from the disaster affected areas of Khyber Pakhtunkhwa (Pakistan). Total water samples (n = 120) were collected from different water distribution...
Article
The contamination and apportionment of soils’ potentially harmful trace elements (PHTEs) have drawn worldwide attention of the researchers. In the present study, agricultural soils collected from Shangla, Northern Pakistan, were investigated for source apportionment, spatial investigation pattern, and health risks (ecological and human) of PHTEs. S...
Article
This study was conducted to investigate the quality of groundwater affected due to the municipal solid waste (MSW) used as a landfill. To assess the impacts, 13 groundwater samples were collected from solid waste dumping sites (SWDS) and 13 from safe sites (SS). Groundwater was analyzed for pH, turbidity, electrical conductivity (EC), total hardnes...
Article
Full-text available
The present study is aimed to investigate the hydrochemical characteristics, spatial distribution and suitability of groundwater for drinking and irrigation purposes along the Indus Suture Zone (ISZ), north Pakistan. Physicochemical parameters and hazardous trace elements (HTEs) like Cd, Co, Cu and Mn were determined following standard methods. The...
Article
Full-text available
Accelerated mining activities have increased water contamination with potentially toxic elements (PTEs) and their associated human health risk in developing countries. The current study investigated the distribution of PTEs, their potential sources and health risk assessment in both ground and surface water sources in mining and non-mining areas of...
Article
Full-text available
In the past few decades, contamination of urban children's parks (UCPs) with potentially toxic elements (PTEs) has been attracting more and more interest; however, assessment of eco-environmental and child exposure risks particularly in developing countries remains limited. The current study investigated PTE (Cr, Ni, Zn, As, Cd, and Pb) concentrati...
Article
Full-text available
Arsenic (As) is one of the toxic metalloids, therefore, can cause health risk in the consumers through consumption of contaminated food and rice. The current study focused on As speciation in rice, bioavailability, mechanisms and its potential human health risk. For this purpose, rice and soil samples were collected from 16 different districts (non...
Article
Full-text available
Mercury (Hg) contamination of aquatic ecological units and subsequent bioaccumulation are major environmental problems of international scope. Moreover, the biogeochemistry of Hg in the remote alpine lakes aquatic ecosystem in the Himalayas remains largely unexplored. The current study investigated Hg concentrations in different environmental compa...
Article
Full-text available
Globally, potentially toxic elements (PTEs) and bacterial contamination pose health hazards, persistency, and genotoxicity in the groundwater aquifer. This study evaluates PTE concentration, carcinogenic and noncarcinogenic health hazards, groundwater quality indexing (GWQI-model), source provenance, and fate distribution in the groundwater of Hind...
Article
Full-text available
Groundwater contamination by potentially harmful elements (PHEs) originating from the weathering of granitic and gneissic rock dissolution poses a public health concern worldwide. This study investigated physicochemical variables and PHEs in the groundwater system and mine water of the Adenzai flood plain region, in Pakistan, emphasizing the fate d...
Article
Full-text available
The contamination of agricultural soil with potentially toxic elements (PTEs) such as cadmium (Cd), lead (Pb), chromium (Cr), zinc (Zn), nickel (Ni), and copper (Cu) persists and intensifies in food crops posing a risk to human health. When used as effective soil manures, biomass conversion to organic amendments can help to deal with this deteriora...
Article
This study investigated the effects of modified and unmodified biochar as soil conditioners in alleviating saline-alkaline soil. The biochar was treated with HCl afterward referred as modified biochar (MBCs) and unmodified biochar (UMBCs), respectively. For the quoted reason, a pot experiment was conducted by taking 2% and 3% doses of MBCs and UMBC...
Preprint
Full-text available
Globally, potentially toxic elements (PTEs), and bacterial contamination in the groundwater gain much attention due to health hazards, persistency, and genotoxicity. The health hazard posed due to PTEs via groundwater contamination is a major public health concern. We aim to evaluate PTEs concentration, carcinogenic and noncarcinogenic health hazar...
Article
Full-text available
This study was conducted to investigate the availability of toxic heavy metals (HM) to earthworm-assisted soils of different land types (urban, rural, industrial, and mining) collected from Khyber Pakhtunkhwa, Pakistan. For this purpose, the soil samples of different land types were collected and assayed for physicochemical properties including HM....
Chapter
Full-text available
Contamination of plants with toxic elements (TEs) is a renowned environmental issue worldwide. The rapid increase in population and high food demand give rise to several pollutants that finally contaminate the ecosystem. Plants cultivated on contaminated soils show a reduction in growth, nutrient uptake, and yield. The concentrations exceeding the...
Article
The impacts of climate change in terms of variability in temperature and rainfall are adversely affecting agriculture and its features like cropping patterns, production, agricultural land use, and handling the food crises of the regions. Developing countries like Pakistan are suffering from the disastrous impacts of climate change on agriculture s...
Article
Full-text available
The response of Vigna radiata L. (mung bean) to tropospheric ozone (O3) phytotoxicity using Ethylenediurea (EDU) and magnesium nitrate (Mg(NO3)2, 20 mg/L and 50 mg/L) was assessed through field experiment in Peshawar, Pakistan. For this purpose, semi-urban area was selected and the concentration of tropospheric ozone was monitored. The mean monthly...
Article
Full-text available
Potentially toxic elements (PTEs) are a major source of pollution due to their toxicity, persistence, and bio-accumulating nature in riverine bed sediments. The sediment, as the largest storage and source of PTEs, plays an important role in transformation of mercury (Hg), lead (Pb), nickel (Ni), chromium (Cr), copper (Cu), zinc (Zn), and other toxi...
Article
Full-text available
Exposure to high level of arsenic (As) through the ingestion of contaminated soil, dust and food plants can pose health risk to humans. This study investigates the total arsenic (As), arsenobetaine (AsB), monomethylarsenate (MMA), dimethylarsenate (DMA), arsenite (As³⁺) and arsenate (As⁵⁺) concentrations in poultry feed, manure, agricultural soils...
Article
Farmlands contamination with heavy metals (HMs) can be considered as a global issue especially in developing countries. The current study investigates the various pollution indices, potential ecological risk index (PERI) and human health risk caused by HMs in selected regions of Punjab Province, Pakistan. Farmlands soil samples were collected, acid...
Preprint
Full-text available
This study was conducted to investigate the effects of municipal solid waste (MSW) used as landfilling on the ground water quality and health effects on the community. The study was carried out in Mardan, Khyber Pakhtunkhwa province- Pakistan. To assess the impacts, 13 ground water samples were collected from Solid Waste Dumping Sites (SWDS) and 13...
Preprint
Full-text available
Accelerated mining activities have increased water contamination with potentially toxic elements (PTEs) and their associated human health risk in developing countries. The current study investigated the distribution of PTEs, their potential sources and health risk assessment in both ground and surface water sources in mining and non–mining areas of...
Preprint
Full-text available
Accelerated mining activities have increased water contamination with potentially toxic elements (PTEs) and their associated human health risk in developing countries. The current study investigated the distribution of PTEs, their potential sources and health risk assessment in both ground and surface water sources in mining and non–mining areas of...
Article
Rice and paddies soil in the mining degraded areas are mostly contaminated with toxic metals like mercury (Hg) Hg is a global pollutant which can change into methylmercury (MeHg), the highly toxic and bio-accumulative organic form. This review paper highlights various aspects of Hg including its methylation and uptake by rice (a staple food) in deg...
Article
Full-text available
The study was about the assessment of fluorides (F−) in drinking water, its possible sources and threats to human health in Malakand District, Khyber Pakhtunkhwa. The F− concentration in drinking water samples was measured by the F− meter and was found substantially high in most of the samples than the WHO limits. The cationic and anionic concentra...
Article
Full-text available
This study was designed to assess the effects of tropospheric ozone (O3) on the yield and nutritional quality of chilli (Capsicum annuum L. cv. Pusa Jwala) using ethylene diurea (EDU) under field conditions in Peshawar, Pakistan. Average O3 concentration ranged between 38 and 68 ppb which is high enough to cause phytotoxic effects. Accumulated ozon...
Article
Full-text available
Arsenic (As), being the first class of carcinogen, reflects disastrous threats to living beings owing to its high persistence, toxicity, bioaccumulation, and bioavailability in the environment. The toxicity of As notably linked with its inorganic forms such as arsenite (AsIII) and arsenate (AsV). The As-contaminated water irrigation of the rice fie...
Preprint
Full-text available
Farmlands contamination with heavy metals (HMs) can be considered as a global issue especially in developing countries. The current study investigates the various pollution indices, potential ecological risk index (PERI) and human health risk caused by HMs in some selected regions of Punjab Province, Pakistan. Farmlands soil samples were collected,...
Article
Full-text available
This study investigated the lead (Pb) contamination levels in a military shooting range soil of Nowshera Cantonment, Pakistan. For this purpose, various soil samples were collected from the military shooting range and analyzed for Pb concentration using the atomic absorption spectrometry (Perkin Elmer 1100B, USA). Results demonstrated that soil Pb...
Article
Full-text available
This study investigates the values of pH, total dissolved solids (TDS), elevation, oxidative reduction potential (ORP), temperature, and depth, while the concentrations of Br, and potentially harmful metals (PHMs) such as Cr, Ni, Cd, Mn, Cu, Pb, Co, Zn, and Fe in the groundwater samples. Moreover, geographic information system (GIS), XLSTAT, and IB...
Article
Full-text available
Wastewater irrigation leads to the deposition of hazardous elements (HE) in irrigated soils which could be accumulated in cultivated vegetables, contaminating the food chain and pose threat to the human population. HE concentrations could be varied in the wastewater-irrigated and background soil and cultivated vegetables with season depending on te...
Article
Arsenic (As) is one of the most toxic metalloids, released to environment from both natural and anthropogenic sources. Among different species of As, inorganic As (iAs) is more toxic than organic As (oAs). Among food stuffs, rice is considered as one of the most important exposure routes of As for human. This study was conducted to quantify total A...
Article
Full-text available
This study evaluates the characteristics of water along the Swat River, Northern Pakistan. For this purpose, water samples (n = 30) were collected and analyzed for physicochemical parameters including heavy metals (HM). The mean concentrations of physicochemical parameters and HM were within the drinking water guideline values set by the World Heal...
Article
Soil pollution with potentially toxic elements is a significant environmental problem worldwide. Such soils need reclamation, utilizing environmentally friendly and cost-effective techniques. Therefore, a study was performed with an aim to evaluate the effect of different organic amendments on bioaccumulation of potentially toxic elements in spinac...
Article
Full-text available
This study investigated the effects of light intensity on growth and biomass production of three submerged macrophyte species including Hydrilla verticillata, Vallisneria natans, and Ceratophyllum demersum in different water strata. For this purpose, water was classified into six strata designed: 5 cm, 30 cm, 60 cm, 90 cm, 120 cm, and 150 cm in the...
Article
Full-text available
This study was carried to assess the arsenic (As) contamination in water, soil, and rice. Surface-water (n=120), soil (n=102), and rice plants (n=50) samples were collected from the Sewakht (rural) and Chitral city (urban) areas, Pakistan, and analyzed for As concentration. The average concentration of As were 2 and 2 µg/L in water, 0.67 and 0.07 m...
Article
Biochar can be tailored to valuable and engineered product with specified requirements, purpose of use, condition of soil, type of potential toxic elements (PTEs) to be remediated, crops cultivated and/or types of feedstocks used as raw materials. Biochar application for remediation of metal contaminated soil has received a great attention in the r...
Chapter
Globally fungi have the ecological and biochemical capability to reduce organic and inorganic chemicals and to decrease the risk associated with contaminants, either by chemical alteration or by manipulating chemical bioavailability in wastewater. Moreover, the abundance functional gene seemed to reflect the type of the contamination. With optimize...
Article
Full-text available
Human exposure to arsenic (As) is a global public health concern that frequently occurs through both dietary and non-dietary pathways. This is the first systematic field study that investigated the drinking water (n = 190) for concentrations of total As (AsT) and its inorganic species such as arsenate As(V) and arsenite As(III) and organic species...
Article
Potentially toxic elements (PTEs) are used in the poultry feed as additives and growth promoters which can transfer to food plants grown on manure-amended agricultural soils. The consumption of food plants grown on manure-amended soil can cause health risk due to presence of high level of PTEs. In this study, PTE concentrations in poultry-manure, s...
Article
Environmentally friendly and cost-effective techniques are required to reclaim land degraded during mining activities. Bioaccumulation of heavy metals (HMs) in vegetables grown on contaminated soils can increase human health risks. The potential effects of hardwood biochar (HWB) was assessed for chromium (Cr), zinc (Zn), copper (Cu), manganese (Mn)...
Article
Full-text available
As a result of metal mining activities in Pakistan, toxic heavy metals (HMs) such as chromium (Cr) and lead (Pb) often enter the soil ecosystem, accumulate in food crops and cause serious human health and environmental issues. Therefore, this study examined the efficacy of biochar for contaminated soil remediation. Poplar wood biochar (PWB) and sug...
Article
Full-text available
This study was carried out to determine potentially toxic element (PTE) contamination and their potential ecological risk factors in shooting range soil. For this purpose soil samples were collected from different locations (left side, right side, shooting point, middle, and stop-butt) from the shooting range of Frontier Corps Training Centre (FCTC...
Article
Full-text available
Life needs clean drinking water free from all types of contaminants including pathogenic bacteria. This study was conducted to assess the drinking water quality in urban areas of Peshawar District, Khyber Pakhtunkhwa, Pakistan. Water samples were collected at the source (tube wells) and the user points. These collected samples were analyzed for...
Article
Full-text available
Seafood is an important exposure route for mercury, especially methyl mercury (MeHg). Therefore, we quantified MeHg concentrations in 69 species of seafood including fish, crustaceans and mollusks collected from Zhoushan Islands, China. MeHg concentrations ranged from <0.0020-0.2098 µg/g and did not exceed the threshold limit of 1 µg/g in all sampl...
Article
Toxic heavy metal(loids) (THMs) are released into natural water systems from geological and anthropogenic sources, and easily accumulated via water and sediments in aquatic fish species. The monitoring of THM concentrations in river water, sediments and fish muscles is therefore, essential to make sure acquiescence with food security guidelines and...
Article
Full-text available
The present study was conducted to investigate the concentrations of potential toxic metals (PTMs) in agricultural soil (n = 25) and their bioaccumulation in wheat crop (n = 25) collected from alongside the Kurram River, Pakistan. The highest concentrations of Cd, Cr, Cu, Fe, Mn, Ni, Pb, and Zn in soil samples were 0.16, 19.5, 14.7, 46.5, 13.5, 14....
Chapter
Constructed wetlands (CWs) have played a significant role in the purification and treatment of domestic, mining, agricultural, and industrial wastewater in the last few decades. CWs are designed and constructed on engineered systems to develop the natural processes involving wetland soils, flora, and their related microbial accumulations to support...
Article
The consumption of contaminated rice is one of the major pathways for human exposure to toxic heavy metals (HMs) therefore, environmentally friendly geo-sorbents are needed to control their mobility in soil and subsequent uptake rates by rice (Oryza sativa). In this study, hardwood biochar (HWB) was applied to three types of degraded soils (1) chro...