W. T. Al-Saggaf

Bio: W. T. Al-Saggaf is an academic researcher from King Abdulaziz University. The author has contributed to research in topics: Cathodic stripping voltammetry & Antimony. The author has an hindex of 3, co-authored 3 publications receiving 436 citations.

Analysis of Some Selected Persistent Organic Chlorinated Pesticides in Marine Water and Food Stuffs by Differential Pulse-Cathodic Stripping Voltammetry

Abstract: Based on the redox characteristics of two selected organochlorine pesticides namely alachlor (ALC) and chlorfenvinphos (CHL) in Britton–Robinson (B–R) buffer at a hanging mercury drop, Pt and Au working electrode (HMDE), a fast, simple and selective differential pulse cathodic stripping voltammetric (DP CSV) method was developed for their determination. The cathodic stripping peak currents for ALC versus concentrations was linear in the range from 7.4109 to 1.4107 molL1 and in the range from 2.7109 to 1.6108 molL1 for CHL. The method was applied for the analysis of trace concentrations of ALC and CHL in fresh- and marine water (Atlantic and Red Sea) and sediment samples and food stuffs

A highly selective electrochemical sensor for trace determination and speciation of antimony (III & V) in water and soil samples using 2-thenoyltrifluoroacetone

Abstract: The current works extend the utility of 2-thenoyltrifluoroacetone reagent (HTTA) towards the least explored antimony (III & V) ions in complex matrices. The redox characteristics and the excellent surface coverage (Γ) of the electroactive antimony (III)-HTTA chelate onto the hanging mercury dropping electrode suggested establishing a differential pulse cathodic stripping voltammetric (DP–CSV) analysis for chemical speciation of antimony (III & V) in environmental water samples. Under the optimized conditions of pH, deposition time, potential, sweep rate, and HTTA concentration, the cathodic peak current at − 0.18 V linearly increased on growing antimony (III) concentration in a wide working range from 2.46 × 10−9 to 1.07 × 10−7 mol L−1, with an obtained detection and quantification limits 7.38 × 10−10 and 2.46 × 10−9 mol L−1, respectively. The figure of merits were compared successfully with some reported electrochemical, chromatographic, and spectrochemical methods. The established DP–CSV method has a unique advantages (rapid response, short analytical time, sensitive, selective, and reproducible) to be quantitatively applied for trace analysis of antimony (III & V) species in fresh and marine water (the Atlantic Ocean and the Red Sea) samples. The settled method was also validated (Student’s t and F tests at P = 0.05) by comparison with the official inductively coupled plasma-mass spectrometry (ICP-MS) method.

Environmental Contamination by Heavy Metals

Abstract: The environment and its compartments have been severely polluted by heavy metals. This has compromised the ability of the environment to foster life and render its intrinsic values. Heavy metals are known to be naturally occurring compounds, but anthropogenic activities introduce them in large quantities in different environmental compartments. This leads to the environment's ability to foster life being reduced as human, animal, and plant health become threatened. This occurs due to bioaccumulation in the food chains as a result of the nondegradable state of the heavy metals. Remediation of heavy metals requires special attention to protect soil quality, air quality, water quality, human health, animal health, and all spheres as a collection. Developed physical and chemical heavy metal remediation technologies are demanding costs which are not feasible, time-consuming, and release additional waste to the environment. This chapter summarises the problems related to heavy metal pollution and various remediation technologies. A case study in South Africa mines were also used.

Paper-based analytical devices for environmental analysis

Abstract: The field of paper-based microfluidics has experienced rapid growth over the past decade. Microfluidic paper-based analytical devices (μPADs), originally developed for point-of-care medical diagnostics in resource-limited settings, are now being applied in new areas, such as environmental analyses. Low-cost paper sensors show great promise for on-site environmental analysis; the theme of ongoing research complements existing instrumental techniques by providing high spatial and temporal resolution for environmental monitoring. This review highlights recent applications of μPADs for environmental analysis along with technical advances that may enable μPADs to be more widely implemented in field testing.