Mohamed Goher

National Institute of Oceanography and Fisheries, Cairo, Egypt · freshwater and Lakes division

The taxonomic and functional diversities of macroinvertebrates are a critical indicator of ecosystem health. This study focuses on the taxonomic and functional diversities of the assemblage structure of macroinvertebrates in the Ibrahimia Canal, Egypt. They were compared across two different substrate habitats: sediment-associated and macrophytes-a...

Mariout Lake is one of the Northern Nile-Delta Lakes in Egypt that receives agricultural, industrial and domestic effluents through several drains. The present study aims to evaluate the levels of some heavy metals (HMs) in water and edible parts of Oreochromis niloticus in Mariout Lake, in addition to studying several pollution indices and potenti...

Macrobenthic invertebrate communities serve as markers of anthropogenic stress in freshwater ecosystems. In this study, 17 sampling sites were selected from two Nile river subbranches (El-Rayah El-Behery and El-Rayah El-Nassery) and subjected to different anthropogenic influences to explore the ecological environment and characteristics of macroben...

Lake Nasser is an artificial reservoir that represents the national freshwater reserve of Egypt and has a number of khors (side extensions) along its eastern and western banks. These khors covered approximately 79% of the lake’s total surface area and have an important effect on water quality and fish production in the lake. This study aimed to mon...

The enhancing breakdown of dyes using facile, novel and eco-friendly photocatalyst without remaining any hazards secondary intermediates from the dye species regarded one of the most challenges to the healthy world. A novel facile method was used to synthesize reduced graphene oxide (rGO) with various doping ratios of silver nanoparticles (Ag NPs)...

Wadi El-Rayan depression, located southwest of Cairo, has two artificial lakes; the upper (first) and lower (second) lakes that are used as reservoirs for the drainage of agricultural wastewater through El-Wadi Drain. Wadi El-Rayan Upper Lake, which is connected directly to El-Wadi Drain, is considered among the most important water-resource lakes...

Wadi El-Rayan depression, located southwest of Cairo, has two artificial lakes; the upper (first) and lower (second) lakes that are used as reservoirs for the drainage of agricultural wastewater through El-Wadi Drain. Wadi El-Rayan Upper Lake, which is connected directly to El-Wadi Drain, is considered among the most important water-resource lakes...

Sediments act as a sink or source of pollution under various conditions. Moreover, they can serve as pollution indicators. The present research aims to evaluate sediment quality associated with its content in heavy metals and the potential ecological risk, focusing on the sub-branches of Nile River (Rayahs) in Egypt, including El-Tawfiky (RT), El-M...

Sediments act as a sink or source of pollution under various conditions. Moreover, they can serve as pollution indicators. The present research aims to evaluate sediment quality associated with its content in heavy metals and the potential ecological risk, focusing on the sub-branches of Nile River (Rayahs) in Egypt, including El-Tawfiky (RT), El-M...

The Nile River is the soul of Egypt, providing more than 95% of its freshwater demand. However, it receives different pollutants discharged into the water body along its stretch from Aswan (downstream of the High Dam) to Cairo, which is approximately 950 km. Alternatively, sediments play an important role in the dynamics of the entire aquatic envir...

This study focused on the monitoring and assessment of aquatic ecosystem functioning based on the abiotic and biotic features of Lake Nasser in the post-flood and pre-flood periods as the last ones before water storing behind the Grand Ethiopian Renaissance Dam. The physicochem-ical parameters, distribution and structure of biotic communities, incl...

Monitoring water quality is an important challenge in both developed and developing countries. Remote sensing data can form a highly frequent dataset with acceptable spatial coverage that can be used to remotely monitor water quality. This paper presents a novel automated model for remotely monitoring water quality to address the problem of insuffi...

Research on the impact of heavy metals and their accumulation in ecosystem elements of Lake Burullus is still scarce. Therefore, this study focuses on the relationship between the levels of heavy metals in the lake water, plankton communities and Nile tilapia ( Oreochromis niloticus ). The mean annual concentrations of Fe, Zn, Cu, Mn, Pb and Cd in...

The Wadi El-Rayan is a depression in the Fayoum oasis collecting agricultural drainage water from the Fayoum. Since 1973, this drainage water formed two man-made lakes. Twenty years ago, a third lake, called Lake Magic was formed. Since this newly formed lake was not yet studied, in January of 2019 we conducted research related to its physico-chemi...

Nasser Lake provides more than 95% of the Egyptian freshwater budget. The levels, spatial distributions, and risk assessments of heavy metals and natural radioactivity were investigated in the water and sediments in the main channel and khors (side extensions) of Nasser Lake in January 2017. Several indices were used to determine the quality and po...

Ni-Al-CO3-layered double hydroxide (LDH) with Ni:Al ratio (3:1) and their nanocomposites with alginate and chitosan beads were prepared and examined for their efficiency in removal of Cd²⁺ and Cu²⁺ ions from wastewater. Different parameters such as contact time, pH value, adsorbent weight, and heavy metal ion concentration on the removal efficiency...

Rosetta and Damietta are the main branches of the Nile River in Egypt. They provide the required freshwater for different usage for about 20 million people. In the present study, chemical and biological indices were used to assess the water quality and provide a full image of the environmental status in the investigated area. Generally, the chemica...

Keywords: Chitosan, lead removal adsorption process Langmuir and Freundlich isotherms. This study deals with new modified chitosan beads with pendent amidoxime moieties [chitosan amidoxime chelating resin (CACR)] prepared by reaction of cross-linking chitosan beads with acrylonitrile and hydroxylamine. The resulting (CACR) resin was characterized u...

Qarun Lake is a remnant of the historic Moreis Lake; it is an enclosed lake receives the water through several drains mainly El-Bats and El-Wadi drains carrying agricultural wastewater mixed with domestic and industrial wastes to the lake, which increases the accumulation of pollutants, in particular, the heavy metals in the lake environment. The p...

The Bahr Yusuf Canal is the life artery of the Fayoum Province, which provides the province with two thirds of the freshwater quota from the Nile River. The present work was carried out to assess the suitability of water in the Bahr Yusuf Canal for various purposes and to assess the potential health risk associated with metal content. The results s...

Heavy metals (HMs) pollution of water is a continuous worldwide issue in both developing and developed countries. HMs are resistant and non-degradable elements that are introduced to the water bodies via natural and anthropogenic processes. The main anthropogenic sources are agriculture, industrial and domestic wastes that are increased due to the...

Wadi El-Rayan lakes are a crucial source of irrigation water and fisheries in El-Fayoum Governorate of Egypt. It is part of the Wadi El-Rayan Protected Area (WEPA) about 125 km Southwest of Cairo. The present study was carried out to assess the present status of the lakes’ water quality, especially after the increasing of un-controlled economic act...

This study was designed to assess the levels of nutrient salts and eutrophication status in Burullus Lake water. Most of the physicochemical characteristics showed wide variations among the sites and seasons (p<0.01). The water of the lake was in the alkaline side, and pH value fluctuated in the range (7.47-8.96). The lake water was oxygenated arou...

The copepod assemblages and abiotic parameters were investigated at 11 stations in a large coastal lake (Lake Manzalah, Nile Delta) from 2009-2010 in order to verify any impacts of eutrophication and salinity on the copepod species composition. The environmental conditions and the copepod assemblages appeared to have changed in comparison with prev...

In this study TiO2@rGO nanoparticles was synthesized as an effective photocatalyst. Reduced graphene oxide (rGO) was mixed with TiO2 with different doping ratio (1%, 3% and 5% wt) and utilized to remove MB dye as organic pollutants from different wastewater effluents and also from aqueous solution. The impacts of different factors, e.g. pH of solut...

Qarun Lake is one of the most important lakes in Egypt; it is the shrunken remnant of Moeris Lake. It is a closed ecosystem represented as a tank for discharged agricultural wastewater of El-Fayoum province. To assess the quality of the lake water for fishing and aquatic live utilization, Oregon water quality and metal pollution indices are compute...

The synthesizing of TiO2@rGO nanocomposites using an efficient method has been carried out to enhance the photodegradation activities of TiO2. Reduced graphene oxide (rGO) synthesis has been illustrated as a key step. The preparation of TiO2@rGO is highly needed and recommended to develop an effective way for the reduction of GO. Our study illustra...

Lake Mariut is suffering from pollution as it receives industrial effluents and a mix of sewage from different drains, often lacking treatment systems. Sequential extraction procedures were applied for the speciation of heavy metals (Fe, Mn, Zn, Cu and Pb) and P in the lake sediment to evaluate their potential bioavailability. Total concentrations...

Abstract Background: Nanotechnology for water remediation is expected to play a crucial role in water security and consequently the food security of the world. Reactive nanoparticles have a significant amount of surfaces and thus attract much interest to be applied as adsorbents in comparison to macromolecules. This study aimed to use the nanoparti...

Visible light Electrochemical property Charge transfer a b s t r a c t Well dispersed-Fe 2 O 3 @Fe 3 O 4 nanoparticles (7 nm) supported on mesoporous nitrogen doped titanium dioxide (N-TiO 2) are synthesized by deposition self-assembly route and their performances as photocat-alysts toward methylene blue (MB) degradation are evaluated. The results...

Nile River is the valued natural and exclusive source of fresh water in Egypt, where the drinking water supply is limited to the river. The water quality of 24 sites between Aswan and Cairo along the Nile was investigated. To evaluate the suitability of water for aquatic life and drinking purposes, the indices of water quality (WQI), heavy metal po...

Visible light Electrochemical property Charge transfer a b s t r a c t Well dispersed-Fe 2 O 3 @Fe 3 O 4 nanoparticles (7 nm) supported on mesoporous nitrogen doped titanium dioxide (N-TiO 2) are synthesized by deposition self-assembly route and their performances as photocat-alysts toward methylene blue (MB) degradation are evaluated. The results...

The present status, a long term change of water quality characteristics besides metal pollution load (Fe, Mn, Zn, Cu and Cd) in water of a heavily polluted Mediterranean Lake (Mariut Lake northwest of Egypt) were investigated. Water quality characteristics varied in a wide range among the different basins. Depending on collecting data; the agricult...

Monem 2016. The isotherm and kinetic studies of the biosorption of heavy metals by non-living cells of Chlorella vulgaris. AbstrAct In general, the biosorption of heavy metals by various types of non-living organisms appears to be a very effective, low-cost and innovative method for their removal from aquatic environments. The aim of this study was...

Ion exchange polymer is a matrix normally insoluble and in the form of small beads having diameters of 300 - 1200 μm, fabricated from organic substrates. This paper deal with three different types of strong acid cation exchanger resins (PUROLITE C-145, DOSHIONCSA 29 and AMBERLIT IR 120 H resin), which have highly developed structure of pores on the...

Dead cells of Chlorella vulgaris were used experimentally to remove cadmium (Cd2+), copper (Cu2+) and lead (Pb2+) ions from aqueous solution under various conditions of pH, biosorbent dosage and contact time. C. vulgaris was isolated from Lake Manzala (Egypt) and then cultivated outdoors, in growth media, maintaining pH of nearly 7.5. After cultiva...

Biotic changes and a salinity increase (from 13 to 40 g.L−1) occurred in Lake Qarun (Egypt) since 1901. Was salinity increasing a cause of observed biotic changes? To answer this question we used benthos as a model group. Benthos and water sampling was conducted in different seasons (2008−2013). Comparing our and literature data, we discuss the lon...

The present study aimed to assess the seasonal variations of the proximate chemical composition, physicochemical, microbiological aspects and heavy metal concentrations of Oreochromis niloticus muscles collected from The Nile rayahs from spring 2014 to winter 2015. Rayahs are the main irrigated canals of Nile Delta, Egypt and represent El Tawfiki,...

Sixteen trace metals were measured for the first time in cyanobacterial mats and its underlying sediment in eight lakes in the Northern Western desert, Egypt. Al, Ba, Cr, Fe, Pb, Mn, Ni, Cu and Zn concentrations in sediments were many times higher than in cyanobacterial mates. Fe, Al, Mn, Cu were the highest trace metals recorded in the lakes. Geo-...

Zooplankton and 14 abiotic variables were studied during August 2011 at 10 stations in Lake Qarun, Egypt. Stations with the lowest salinity and highest nutrient concentrations and turbidity were close to the discharge of waters from the El-Bats and El-Wadi drainage systems. A total of 15 holozooplankton species were identified. The salinity in Lake...

El-Sharkawia Canal is an irrigation canal located at El-Qualubia governorate and receiving water directly from River Nile. 40 Water and 36 Sediment samples were collected seasonally from November, 2013 to August, 2014. Nine heavy metals; Fe, Mn, Zn, Cu, Ni, Co, Cr, Pb and Cd were assessed. The concentration levels of the measured metals in water sa...

This study establishes a baseline for trace metal speciation in Qarun and Wadi El-Rayan lakes. A five-step sequential extraction procedure was applied for the speciation of the Fe, Mn, Zn, and Cu in sediment samples collected at Qarun and Wadi El-Rayan lakes. Mn and Cu were the most mobile metals, whereas the residue fraction maintained the highest...

The removal of aluminum, iron and manganese from some pollution sources that drain into Ismailia Canal has been investigated using two different sorbents; granular activated carbon (GAC) and Amberlite IR-120H (AIR-120H). Batch equilibrium experiments showed that the two sorbents have maximum removal efficiency for aluminum and iron pH 5 and 10 min...

El-Bahr El-Pharaony Drain is a crucial source of irrigation water and fisheries in Menoufia Governorate of Egypt. According to the results demonstrated by the present study, its water may be suitable for irrigation; yet it is an inappropriate habitat for aquatic life, and the water quality is categorized as fair (WQI=67) and marginal (WQI=46), resp...

Ismailia Canal is one of the most important branches of the Nile River in Egypt. It is the main source of drinking and irrigation water for many cities. Weighted arithmetic method of water quality index (WQI) was used to evaluate the water quality of Ismailia Canal according to drinking, irrigation and aquatic life water utilizations. The objective...

Eight heavy metals were measured seasonally in the sediment of Lake Nasser during 2013. 27 sites were chosen through 9 sectors across the main channel of the lake from Abu-Simbel to Aswan High Dam to assess the levels of the selected metals. The abundance of these metals was in the order of Fe > Mn > Zn > Cr > Ni > Cu > Pb > Cd, with mean concentra...