Abstract Methylene blue (MB) is abundantly found in textile industrial effluent which can cause severe health problems for public and environmental ecology. Therefore, this study aimed to remove MB from wastewater using the activated carbon developed Rumex abyssinicus . The adsorbent was chemical thermal methods, then it characterized by SEM, FTIR, BET, XRD, pH zero-point charge (pHpzc). adsorption isotherm kinetics were also investigated. experimental design composed of four factors at...

Background A high concentration of Black MNN reactive dye in untreated tannery wastewater can cause adverse effects on public health and environmental sustainability. Therefore, this study aimed to investigate the adsorptive performance Rumex Abyssinicus-based activated carbon (RAAC) remove from wastewater. Method The stem Abyssinicus was impregnated with 50 % diluted phosphoric acid at ratio 1:3 (w/w biomass acid) then it carbonized muffle furnace 600°C. Box-Behnken experimental design 34...

Microplastics are discharged into the environment through human activities and persistent in environment. With prevalent use of plastic-based personal protective equipment prevention spread COVID-19 virus, concentration microplastics is envisaged to increase. Potential ecological health risks emanate from their potential adsorb transport toxic chemicals, ease absorption cells living organisms interfering with physiological processes. This review (1) discusses sources pathways which enter...

Industrial wastewater polluted with high concentrations of Cr is commonly discharged into water resources without proper treatment. This gives rise to the deterioration quality and imposes adverse effects on public health. Therefore, this study aimed at removing from electroplating using activated carbon produced hyacinth under a full factorial experimental design three factors levels (pH,2,5 8, adsorbent dose 0.5,1and1.5 in 100 mL contact time 30, 60 and120 min). A phosphoric acid solution...

A large proportion of the population in low-income countries (LICs) has limited access to portable drinking water. This leads many people consuming contaminated water, which is associated with several health risks. It thus, important reduce exposure water-borne pathogens and toxic chemicals through effective water treatment. In this regard, point use (POU) treatment techniques can ensure quality especially where systems are compromised, or centralized non-existent. An affordable POU option...

Abstract The high cost of precursor materials has hindered commercialization ceramic membranes (CM). In this work, a microfiltration disc (≈50 mm in diameter and 4 thick) is prepared from low‐cost materials, kaolin, fly ash (≈67 26 wt.%, respectively) by pressing at 200 bar calcining 900 °C. Membrane characterization involved physicochemical properties, NOM removal efficiency, fouling propensity analysis. Furthermore, the efficiency CM tested on samples collected four drinking water...

Natural organic matter (NOM) is a complex heterogeneous mixture of humic (HS) and non-humic substances which are widespread in the aquatic environment. Other constituents amino acids, aliphatic aromatic hydrocarbons containing oxygen, nitrogen hydroxyl groups. It combination proportions these motifs give NOM its overall polarity reactivity. Its main origins include soils, residues fauna flora, microbial excrements anthropogenic faecal loads, agriculture activities urban landscapes. Due to...

The removal dynamics of biodegradable dissolved organic carbon (BDOC) and natural matter (NOM) polarity fractions at a water treatment plant (WTP) in South Africa was studied using UV-Vis absorbance, fluorescence excitation-emission matrix, two-dimensional synchronous spectroscopy (SFS). This study gave insights into the transformation NOM due to processes. objectives were: (i) use chemometric analysis SFS correlations investigate evolution arising from processes, (ii) access chemical...

This work presents the first comprehensive investigation of natural organic matter (NOM) fraction removal using ceramic membranes in South Africa. The rate bulk NOM (measured as UV254 and DOC % removal), biodegradable dissolved carbon (BDOC) fraction, polarity-based fractions, fluorescent (FDOM) fractions was investigated from water abstracted drinking treatment plants (WTPs) Further, mechanisms membrane fouling by waters Africa were studied. Ceramic removed more than 80% samples coastal...

Abstract This work reports on the fundamental factors influencing inter-foulant and foulant-membrane interactions during simulated dissolved organic matter removal using ceramic nanofiltration. Fouling tests were performed sodium alginate (SAL), humic acid (HA) bovine serum albumin (BSA) as model foulants. potentials of each foulant their mixtures investigated feed solutions containing fixed concentrations K+, Na+, Mg2+ Ca2+ with a total ionic strength 10 mM. The impact modification by...

Abstract Natural organic matter (NOM) influences the quality and treatability of drinking water; therefore, its removal is paramount. A few studies exist on NOM in developing countries, comparative are even fewer globally. This study compared efficiencies for bulk biodegradable carbon (BDOC) fractions water treatment plants Zimbabwe (Z) South Africa (S). efficiency at coagulation stage plant Z S was 11% 13%, respectively. The fluorescence index (FI) raw feeding (1.66) indicated a mixture...

Abstract Natural organic matter (NOM) serves as a precursor for the formation of carcinogenic disinfection by-products when not adequately removed by conventional water treatment processes. The degradation NOM heterogeneous Fenton processes is particularly attractive because it results in prospects zero sludge discharge. This work reports on and adsorption via process using phytogenic zero-valent iron nanoparticles (nZVI) synthesised from green tea extract (Camellia sinensis) supported...

Abstract This study used spectroscopic methods to investigate the fate and dynamics of natural organic matter (NOM) as it traverses treatment train at three water plants (WTPs) in South Africa. The character, quantity, removability NOM specific stages was investigated by measuring changes dissolved carbon (DOC) concentration, ultra-violet absorbance, UV various indices, maximum fluorescence intensity levels. A novel method identifying quantifying fluorescent fractions combining synchronous...

This work investigates the enhancement of antifouling properties ceramic nanofiltration membranes by surface modification via atomic layer deposition (ALD) TiO2. Feed solutions containing bovine serum albumin (BSA), humic acid (HA) and sodium alginate (SA) were used as model foulants. The classic fouling mechanism models modified indices (MFI) deduced from flux decline profiles. Surface roughness values ALD coated uncoated 63 71 nm, respectively, while contact angles 34.2 59.5°,...

Abstract Extant literature has demonstrated that conventional water treatment processes especially in developing countries struggle completely removing detrimental organic loads. Emerging research delineates nanomaterials such as nanoscale zero valent iron (nZVI) to have excellent performance matter removal from aqueous media. In this work, nZVI particles were prepared the liquor of commercially available green tea and supported on kaolin (K‐nZVI) investigated an adsorbent for natural (NOM)...