Author
Noorahayu Yahya
Bio: Noorahayu Yahya is an academic researcher from International Islamic University Malaysia. The author has contributed to research in topics: Langmuir adsorption model & Adsorption. The author has an hindex of 1, co-authored 1 publications receiving 175 citations.
Papers
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TL;DR: The results indicates that the highest percentage removal of Pb can be achieved at pH 5, 40 mg/L of CNTs, contact time 80 min, and agitation speed 50 r/min, and the highest correlation coefficients from Langmuir isotherm model indicates the strong adsorptions of P b(II) on the surface of C NTs.
Abstract: The capability of carbon nanotubes (CNTs) to adsorb lead (Pb) in aqueous solution was investigated. Batch mode adsorption experiment was conducted to determine the effects of pH, agitation speed, CNTs dosage and contact time. The removal of Pb(II) reached maximum value 85% or 83% at pH 5 or 40 mg/L of CNTs, respectively. Higher correlation coefficients from Langmuir isotherm model indicates the strong adsorptions of Pb(II) on the surface of CNTs (adsorption capacity Xm = 102.04 mg/g). The results indicates that the highest percentage removal of Pb (96.03%) can be achieved at pH 5, 40 mg/L of CNTs, contact time 80 min, and agitation speed 50 r/min.
209 citations
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TL;DR: It is evident from the literature survey articles that ion-exchange, adsorption and membrane filtration are the most frequently studied for the treatment of heavy metal wastewater.
6,844 citations
TL;DR: In this article, the use of carbon nanotubes (CNTs), member of the fullerene structural family, is considered with special focus on the removal of heavy metals from water (lead, chromium, cadmium, arsenic, copper, zinc and nickel).
946 citations
TL;DR: Carbon nanotubes (CNTs) have aroused widespread attention as a new type of adsorbents due to their outstanding ability for the removal of various inorganic and organic pollutants, and radionuclides from large volumes of wastewater as discussed by the authors.
937 citations
01 Feb 2017
TL;DR: A review of membrane filtration, ion exchange, ion-exchange, adsorption, chemical precipitation, nanotechnology treatments, electrochemical and advanced oxidation processes are discussed in this article.
Abstract: Heavy metals like arsenic, copper, cadmium, chromium, nickel, zinc, lead, and mercury are major pollutants of fresh water reservoirs because of their toxic, non-biodegradable, and persistent nature. The industrial growth is the major source of heavy metals introducing such pollutants into different segments of the environment including air, water, soil, and biosphere. Heavy metals are easily absorbed by fishes and vegetables due to their high solubility in the aquatic environments. Hence, they may accumulate in the human body by means of the food chain. Various methods have been developed and used for water and wastewater treatment to decrease heavy metal concentrations. These technologies include membrane filtration, ion-exchange, adsorption, chemical precipitation, nanotechnology treatments, electrochemical and advanced oxidation processes. In this review, the methods as well as their mechanisms and efficiency are discussed.
724 citations
TL;DR: Results suggested that the methylene blue adsorption on CNTs was a spontaneous and endothermic process.
684 citations