Huan-Ping Chao

• Professor
• Laboratory Manager at Chung Yuan Christian University

This research examines the efficacy of layered double hydroxides (LDHs) in removing phosphate and nitrate from wastewater, enhanced by the memory effect and in situsynthesis techniques. LDHs were synthesized hydrothermally, initially creating carbonate-based CO₃–LDHs, which were then converted to chloride-based Cl–LDHs through anion exchange. These...

Commercial granular ferric hydroxide (Fe-hydroxide), manganese zeolite (Mn-zeolite), and (powder and granular) activated carbon (PAC, Norit-GAC, and Calgon-GAC) were used for exploring the removal efficiency of antimony from aqueous solutions. Fe-hydroxide exhibited the highest adsorption capacity towards Sb(III) and Sb(V). The removal efficiency f...

The composite adsorbent derived from titanate nanotubes (TNTs), layered double hydroxides (LDHs) and oyster shell (OS) were used to removal cationic and anionic dyes. Scanning electron microscopy confirmed the successful integration of TNTs, LDHs, and OS, displaying distinct rod-like and hexagonal structures, as well as a rough surface. Energy disp...

The presence of arsenic in groundwater, and through this in drinking water, has been shown to present a serious risk to public health in many regions of the world. In this study, two iron-rich carbonous adsorbents were compared for the removal of arsenate (As(V)) from groundwater. Biochars (FeO-biochar and FeO-pyrochar) derived from biomass waste w...

Ettringite is a hydrous calcium aluminum sulfate mineral present in cement. In this study, ettringite was synthesized via co-precipitation to remove methyl blue, dichromate, and copper ions from solutions with various pH values. The synthesized ettringite was characterized using scanning electron microscopy, X-ray photoelectron spectrometry, Fourie...

Oxygen-containing groups on the surfaces of materials (i.e.,-COOH and-OH) are vital to the adsorption of toxic metals. Acrylic acid is used as a green grafter to enhance the density of these groups in carbonaceous materials, whereas ammonium cerium nitrate is used as an initiator. Hydrochar (prepared via hydrothermal carbonization at 190°C), biocha...

The objective of this study was to investigate the adsorption performance and mechanisms of tetracycline (TC) on hydrochar and hydrochar-derived activated carbon. We also assessed the influence of the solution pH and ionic strength on the adsorption of these compounds and studied their removal by synthetic adsorbents. The maximum adsorption capacit...

Nanotechnology is an emerging field that plays a vital role in the elimination of environmental pollutants. Nanomaterials have been applied for controlling and remediating contaminates (air, soil, and water) because of some of their advanced properties such as large specific surface area. Some nanomaterials based on transition metals can serve as o...

BACKGROUND The adsorption equilibrium constant of the Langmuir model (KL; L mol⁻¹) has been applied as the standard thermodynamic equilibrium constant, KEqo, for calculating the thermodynamic parameters (∆G°, ∆S°, and ∆H°) of an adsorption processes by using the van't Hoff equation. Some authors have (directly and indirectly) applied the constant K...

This study aimed to develop an extremely highly porous activated carbon derived from soybean curd residues (SCB-AC) through two-step pyrolyzing coupled with KOH activating process and then apply it for removing paracetamol (PRC) and tetracycline (TCH) from water. The optimal conditions for chemical activation were 800 °C and the ratio of KOH to mat...

Titanium nanotubes (TNT) is commonly synthesized from TiO2 P25 under hydrothermal reaction (HTR) using 10M NaOH). Composite adsorbents derived from TiO2 and carbon spheres (CS) via a facile two-stage HTR process were investigated. CS was firstly synthesized from glucose through HTR. The mixture (CS, TiO2, and NaOH) was then transferred to a Teflon-...

Carbon spheres and layered double hydroxides (CSs–LDHs) composite adsorbents were used for the removal of Pb(II), Cd(II), Cu(II), Cr (VI), phenol, toluene, and acid red 1 (AR1) from water and wastewater. The CSs–LDHs composites were synthesized using a hydrothermal method, followed by calcination in the temperature range of 300–800 °C to alter thei...

6. Insight into adsorption mechanism of cationic dye onto agricultural residues-derived hydrochars: Negligible role of π-π interaction (Hai Nguyen Tran†, Sheng-Jie You† & Huan-Ping Chao†) Link: https://link.springer.com/article/10.1007/s11814-017-0056-7

This study developed a layered double hydroxides (Mn/Mg/Fe-LDH) material through a simple co-precipitation method. The Mn/Mg/Fe-LDH oxidized arsenite [As(III)] ions into arsenate [As(V)] anions. The As(III) and oxidized As(V) were then adsorbed on Mn/Mg/Fe-LDH. The adsorption process of arseniate [As(V)] oxyanions by Mn/Mg/Fe-LDH was simultaneously...

Adsorption thermodynamics is an integral part of the study of adsorption and plays a vital role in estimating adsorption mechanism (i.e., physisorption and chemisorption). For the liquid-phase adsorption, the equilibrium constant of some adsorption isotherm models (Langmuir, modified Langmuir, Langmuir–Freundlich, modified Langmuir–Freundlich, Liu,...

https://www.elsevier.com/books/solid-liquid-adsorption/tran/978-0-12-821836-5

In this study, two types of agricultural wastes, sugarcane bagasse (SB) and cassava root husks (CRHs), were used to fabricate biochars. The pristine biochars derived from SB and CRHs (SBB and CRHB, respectively) were modified using ZnO nanoparticles to generate modified biochars (SBB-ZnO and CRHB-ZnO, respectively) for the removal of Reactive Red 2...

The presence of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) in water and wastewater has recently been reported. According to the updated literature, the stools and masks of the patients diagnosed with coronavirus disease (COVID-19) were considered as the primary route of coronavirus transmission into water and wastewater. Most of c...

The presence of acetaminophen (also known as paracetamol; PRC) micropollutant in water caused some potential health risks for human. In this study, commercial activated carbon (CAC), which had been oxidized with HNO3 by supplier to increase the oxygen-functional groups, was applied to remove PRC from water. Results demonstrated that CAC is a domina...

In-situ sorbent amendment is a relatively low-cost, low-impact approach for remediation of soil contaminated with heavy metals (HMs), and thus is considered a way to be favored in developing countries. In this study, materials of non-hazardous, alkaline agronomic and industrial by-products were used as sorbents to explore their capacity of in situ...

In this study, a catalyst derived from iron slag (Fe-S) was used for heterogeneous Fenton oxidation (H2O2/Fe-S) of paracetamol in aqueous solution; the conventional homogeneous Fenton reaction (H2O2/Fe2＋) was run in parallel for comparison. Degradation of paracetamol, in terms of chemical oxygen demand (COD) removal, was found strongly dependent on...

Recycling materials from waste has been considered one of the essential principles in the context of sustainable development. In this study, we used teak sawdust as the feedstock material to synthesize activated carbon (AC) samples and evaluated the application of these ACs in the adsorption of methylene blue (MB), Cd(II), and Cu(II). The sawdust w...

Towards Biochar Global Market Development (Time: 10-14 November 2019. Location: Korea University Seoul, Korea)

The capacity and underlying mechanism of hydrochars derived from commercial D-glucose and wasted orange peels (designated as pristine hydrochars) and further modified with nitric acid (designated as oxidized hydrochars) to adsorb methylene blue (MB) were investigated. Both pristine- and oxidized-hydrochars were characterized by SEM, BET specific su...

Three carbonaceous porous materials (biochar and activated carbon) were developed from the Tectona grandis tree sawdust. The applied process of two-stage preparation included pre-treatment through hydrothermal carbonization at 190 °C and subsequent pyrolysis at 800 °C. Two chemical activating agents (K2CO3 and ZnCl2) were used to prepared activated...

Contaminants in water bodies cause potential health risks for humans and great environmental threats. Therefore, the development and exploration of low-cost, promising adsorbents to remove contaminants from water resources as a sustainable option is one focus of the scientific community. Here, we conducted a critical review regarding the applicatio...

With the recent progress in nanotechnology and material engineering, nano-based coatings have become multifunctional, smarter, efficient, versatile and durable. Superhydrophobic coatings are an important class of the smart coating family, which has gained recognition in coating science over the last few years. The uniqueness of superhydrophobic coa...

The batch adsorption capacity of Pinus insularis in the removal of Mn2+/7+ was 4.51 mg/g which was 90.73% removal. As the initial sorbate concentrations were increased, the amount adsorbed also increased. This is due to the presence of functional groups i.e. −OH, − CH, −COO, −C-OH, −C-H and −COO found in the FTIR results and the SEM results showing...

The author's email address of Hai Nguyen Tran should be inserted.

This study aimed to develop a novel in-situ method to directly remove dichromate from groundwater. The characteristics of Mg/Al-layered double hydroxides (LDH) involving in-situ synthesis and exchangeable anion in the interlayer region can facilitate to remove dichromate Two methods of LDH preparation were employed to examine the adsorption result...

Mg/Al layered double hydroxides (LDH) intercalated with sulfur containing-organic anions (L-cysteine, potassium ethyl xanthate, and sulfate sodium dodecyl) were synthesized through a co-precipitation method at low supersaturation, yielding Cys-LDH, PEX-LDH, and SDS-LDH, respectively. The samples of synthetic LDH were characterized by Fourier transf...

Six lignocellulose wastes-derived biosorbents [cantaloupe peel (CAN), pine cone (PC), litchi fruit peel (LP), annona squamosal (AS), bamboo shoot (BS), and sugarcane bagasse (SB)] were selected as low-cost and renewable materials to prepare chemically modified biosorbent. The modified biosorbent was prepared through a newer carboxyl groups-grafting...

Mg/Al layered double hydroxides (LDH) directly intercalated with organic anions (citrate and malate) were synthesized through a co-precipitation method at low supersaturation, yielding Citrate-LDH and Malate-LDH, respectively. Three obtained LDH samples were characterized using X-ray diffraction, Fourier transform infrared spectroscopy, zeta potent...

High ammonium concentration in groundwater represents a major public health concern in Hanoi, Vietnam. In this study, activated carbon was prepared from corncob using H3PO4 through a one-stage chemical activation process. Corncob activated carbon (CCAC) was subsequently treated with NaOH to enhance its cation exchange capacity. The results showed t...

This study developed a novel method to promote the remediation efficiency of air sparging. According to the enhanced-volatilization theory presented in this study, selected alcohols added to groundwater can highly enhance the volatilization amounts of organic compounds with high Henry’s law constants. In this study, the target organic compounds con...

Mg/Al layered double hydroxides (Mg/Al-LDHs) directly intercalated with different amino acids (phenylalanine, tyrosine, and serine) were synthesized through a co-precipitation method, yielding Phenylalanine-LDH, Tyrosine-LDH, and Serine-LDH, respectively. The obtained LDHs were characterized with X-ray diffraction, Fourier transform infrared spectr...

A hydrophilic Y zeolite was primarily treated with sodium hydroxide to enhance its cation exchange capacity (Na-zeolite). The organo-zeolite (Na-H-zeolite) was prepared by a modification process of the external surface of Na-zeolite with a cationic surfactant (hexadecyltrimethylammonium; HDTMA). Three adsorbents (i.e., pristine zeolite, Na-zeolite,...

This study investigated the mechanism and capacity of adsorption of methylene green (MG5) onto various biochars derived from golden shower pod (GSB), coconut shell (CCB), and orange peel (OPB). The biochar was prepared through a pyrolysis process at 800 °C for 4h in an non-circulated air atmosphere. The results showed that BET specific surface area...

Spherical biochar derived from saccharides (glucose, sucrose, and xylose) was prepared through two steps: pre-hydrothermal carbonization at 190°C and calcination at low temperatures (200-325°C). The spherical biochar was characterized by Brunauer-Emmett-Teller (BET) surface area analysis, Fourier transform infrared spectroscopy, zeta potential, sca...

This study investigated the phenomenon and mechanism of adsorption of methylene green 5 (MG5) on three pristine biosorbents: golden shower pod (GS), coconut shell (CC), and orange peel (OP). The results showed that the biosorbents possessed low specific surface areas, but abundant functional groups. Adsorption was strongly affected by the solution'...

Three saccharides (glucose, sucrose, and xylose) were used as pure precursors for synthesizing spherical biochars (GB, SB, and XB), respectively. The two-stage synthesis process comprised: (1) the hydrothermal carbonization of saccharides to produce spherical hydrochar’ and (2) pyrolysis of the hydrochar at different temperatures from 300 °C to 1,2...

Hydrochars derived from golden shower (GSH), coconut shell (CCH), and orange peel (OPH) were synthesized and applied to remove methylene green (MG5). The results indicated that the hydrochars possessed low specific surface areas (6.65-14.7 m2/g) but abundant oxygen functionalities (1.69-2.12 mmol/g). The hydrochars exhibited cellular and spherical...

In recent years, adsorption science and technology for water and wastewater treatment has attracted substantial attention from the scientific community. However, the number of publications containing inconsistent concepts is increasing. Many publications either reiterate previously discussed mistakes or create new mistakes. The inconsistencies are...

Accurate Henry's law constants (H) are unavailable for the majority of organic pollutants, especially those having a low volatility. A novel kinetics-based experimental method is introduced to determine H for a wide range of low-H compounds. The method consists of measuring independently the water-to-air transfer coefficient (KL) and the associated...

This study investigated the adsorption capacities of various contaminants on glucose-derived hydrochar (GH) and glucose-activated carbon (GAC) functionalized with triethylenetetramine (TETA). The two-stage synthesis process consisted of (1) hydrothermal carbonization using various TETA concentrations (1%–5%) to create TETA-functionalized GHs, and (...

The mechanism and capacity of methylene green (MG5) adsorption onto commercial activated-charcoal (CAC, Norit RB4C) were investigated in batch experiments. The microporous CAC material was found to exhibit a large specific surface area (1,026 m2/g) and high total pore (0.502 cm3/g) and micropore (0.347 cm3/g) volumes. The point of zero charge (9.81...

Activated carbons were synthesized from golden shower through chemical activation. Two synthesis processes were used: one-stage and two-stage processes. In the one-stage process, GS that was impregnated with K2CO3 was directly pyrolyzed (GSAC), and the two-stage process consisted of (1) pyrolytic or hydrolytic carbonization to produce biochar or hy...

This study aimed to determine and compare the adsorptive capacity of Pb2+ and Cu2+ in simulated wastewater onto three agricultural wastes The adsorption capacities of Pb2+ onto the agricultural wastes can be arranged as Litchi chinensis (4.30 mg of sorbate per g of sorbent (mg g-1), 85.68% adsorption) > Bambusa vulgaris (3.83 mg g-1, 76.19% adsorpt...

The affiliation of the author Huan-Ping Chao should be corrected. The correct affiliation is :2Department of Environmental Engineering, Chung Yuan Christian University, Chung-Li, 32023, Taiwan

http://eds.b.ebscohost.com/abstract?site=eds&scope=site&jrnl=10881697&AN=115751290&h=2s7Q4QdrCy68mJSaqzMyyhYiHMNFU5MqR%2bZMxKfyrISH1rpklYu3LWs%2bNFEf8g%2fsZuj%2fp7Nf998%2fyaWPfdfO3Q%3d%3d&crl=c&resultLocal=ErrCrlNoResults&resultNs=Ehost&crlhashurl=login.aspx%3fdirect%3dtrue%26profile%3dehost%26scope%3dsite%26authtype%3dcrawler%26jrnl%3d10881697%26A...

The mechanism and capacity of adsorption of cadmium (Cd) on orange peel (OP)-derived biochar at various pyrolysis temperatures (400, 500, 600, 700 and 800°C) and heating times (2 and 6 h) were investigated. Biochar was characterized using proximate analysis, point of zero charge (PZC) analysis, Fourier transform infrared spectroscopy, scanning elec...

The objective of this study was to develop a dual-electronic adsorbent using hexadecyltrimethylammonium (HDTMA)-modified NaY zeolite. HDTMA-modified zeolite (HMZ) possesses a positive charge on the external surface and a negative charge on the micropore surface, and therefore it simultaneously adsorbs cationic (Cu2+, Zn2+, Ni2+, Pb2+, and Cd2+) and...

This study investigates the removal of volatile organic compounds (VOCs) from the air through the use of organic substance-modified titanate nanotubes (TNTs). The TNTs were derived from TiO 2 through a hydrothermal method, and were modified using hexadecyltrimethylammonium bromide and octadecyltrichlorosilane (OTS) to change the surface hydrophilic...

This study used three types of agricultural waste, Citrus maxima peel, passion fruit shell, and sugarcane bagasse, to produce biosorbents for copper(II), cadmium(II), nickel(II), and lead(II) metal ion removal in a fixed-bed column. The biosorbent properties were characterized using scanning electron microscopy, zeta potential analysis, Fourier tra...

We investigated the effects of chemical activation of hydrothermally derived activated carbon spheres (ACSs) with KOH at 800 °C, in hydroxide-to-sample mass ratios of 2–5:1, on the pore structure, surface chemical species, and adsorption characteristics of the carbonized materials. ACS samples were prepared from glucose, sucrose, and xylose sacchar...

The potential of adsorptive removal of ammonium with titanate nanotubes (TNT) was investigated. TNT was prepared via a hydrothermal treatment of TiO2 powders in a 10 M NaOH solution at 150 °C for 24 h, and subsequently washed with HCl aqueous solution of different concentrations. Effects of the alteration of microstructures of TNT, induced by the a...

Carbon spheres (CSs) with excellent adsorption potential towards methylene green (MG) dye and Cu2+ ions were obtained through hydrothermal method at 190 °C followed by a series of activation steps: moderate-temperature calcination at 200-280 °C and grafting of surface functionalities by copolymerization of acrylic acid. Interconnected and nonporous...

The adsorption capacities and mechanisms of organic compounds with water solubilities (Sw) ranging from 55 to 75 000 mg/L, oxyanions, and heavy metal ions onto surfactant (hexadecyltrimethylammonium, HDTMA) modified titanate nanotubes (TNT) were investigated. Effects of the HDTMA-modified process on the revolution of microstructures and surface che...

The potential of adsorptive removal of organic compounds with a wide range of solubility (Sw) from 55 to 75,000 mg/L onto octadecyltrichlorosilane (OTS) modified titanate nanotube (TNT) was investigated. The examined organic adsorbates included trichloromethane, benzene, toluene, ethylbenzene, propylbenzene, n-pentanol, m-cresol, and phenol. The ad...

Effects of pore structure and surface chemical characteristics of titanate nanotubes (TNTs) on their adsorptive removal of organic vapors were investigated. TNTs were prepared via a hydrothermal treatment of TiO2 powders in a 10 M NaOH solution at 150 °C for 24 h, and subsequently washed with HCl aqueous solution of different concentrations. Effect...

Three types of agricultural waste, citrus maxima peel (CM), passion fruit shell (PF) and sugarcane bagasse (SB), were used to produce biosorbents for removing the heavy metal ions of copper(II), cadmium(II), nickel(II) and lead(II) from a pH 5.0 solution. The properties of biosorbents were characterized using scanning electron microscopy (SEM), zet...

The objective of this study was to investigate the effects of surfactants aggregating the gas-liquid interface on the volatilization rates of the organic compounds. The changes in the overall mass transfer coefficient (K OL) and concentration at gas-liquid interface of organic compounds in surfactant (dodecylbenzene sulfonic acid sodium, DBS) solut...

In this study, we investigated the adsorption capacities and the mechanisms of adsorption of cationic [copper(II), zinc(II), nickel(II), lead(II), cadmium(II)] and oxyanionic [dichromate(-II), permanganate(-I)] metal ions onto hexadecyltrimethylammonium (HDTMA)-modified and unmodified NaY zeolites. To understand the surface characteristics of the m...

This article investigated the sorption capacities and sorption mechanisms of several organic compounds, benzene, toluene, ethylbenzene, propylbenzene, trichloromethane, n-pentanol, m-cresol, and phenol with different water solubilities (Sw, ranging from 55 to 75,000mg/L) onto n-octadecyltrichlorosilane (OTS)–modified and unmodified NaY zeolite. The...

In this article, we describe the development of a radio frequency identification exposure monitoring system (RFEMS) suitable for tracking and identifying workers' locations in indoor workplaces. Five workers in southern Taiwan wore the RFEMS integrated into their equipment vests. Location and exposure data were transferred to data analysis software...

The effects of turbulence intensity (velocity gradient, G (s(-1))), Henry's law constant (H), and molecular weight (M) on the volatilization rates of organic compounds are examined using changes in the mass transfer coefficients (K(OL) (cm/min)) under specific liquid-mixing intensities. The selected compounds were divided into three groups accordin...

The biodegradation of polycyclic aromatic hydrocarbons (PAHs) via free-living and attached micro-organisms in soil/water systems was observed in order to examine the variability in the community dynamics and physiological profiles of the micro-organisms. As determined by fluorescence in situ hybridization (FISH), the Domain Bacteria, consisting of...

A new approach is developed to predict the volatilization loss of the pure liquid and the volatilization rates of organic solutes with different Henry's law constants (H) under wind speed. The tested compounds include eight volatile organic compounds for pure liquid and the forty-one organic solutes with different H compounds are divided into three...

Effects of organic compounds, surfactants, and salinity on the rates of volatilization of benzene, toluene, ethylbenzene, p‐xylene, and m‐xylene (BTEX) mixtures were investigated by measuring the half‐life of volatilization under temperatures of 15°C, 30°C, and 45°C. With the assumption that the volatilization process might be viewed as a first ord...

Changes in the overall mass transfer coefficient (KOL) of several volatile organic compounds (VOCs) in surfactant (Triton X-100, Triton X-305, and Triton X-405) solutions are investigated. Different surfactant concentrations, from below to above the critical micelle concentration (CMC), are used to examine the possible inhibition effects on the vol...

The sorption characteristics of three Triton series surfactants (Triton-100, Triton-305, and Triton-405) from aqueous solution onto four different solids with a wide range of organic matter (OM) content were studied through the liquid chromatograph mass spectrometry (LC-MS) analysis. The examined surfactant concentrations ranged from below to above...

The emission characteristics of aromatic and aliphatic volatile organic compounds (VOCs) produced by two kinds of surfactants, nonionic Triton X-100 (TX-100) and cationic domiphen bromide (DB), washing high and low soil organic matter (SOM) soils were evaluated with two mass-balance equations. The influential factors on volatilization mass were pri...

A solution property parameter phi was defined to examine the distribution characteristics of organic compounds between the solids and four nonionic surfactant solutions. The studied compounds consisted of BTEX (benzene, toluene, ethylbenzene, and p-xylene) and chlorinated pesticides (lindane, alpha-BHC, and heptachlor epoxide), which span several o...

This study examined the changes in the bacterial community during biodegradation of polycyclic aromatic hydrocarbon (PAH) substrate when N'-N' dimethylformamide (DMF) was added. The microbial populations that biodegrade the PAH substrate were assessed by Fluorescence in-situ hybridization (FISH) and changed from 49.45% Archaea and 49.15% Bacteria t...

The emissions of two types of organic solutes during the coagulation process were simulated using Jar Test equipment and two additives, coagulant and polymer, to evaluate the volatilization characteristics under various operating conditions. The solute volatilization rates were found to be a function of the liquid mixing intensity, the chemical pro...

The influence of natural organic matter (NOM) constituents on contaminant distribution coefficients was evaluated by determining the Koc values of aromatic and aliphatic organic compounds (solutes) with clays modified with both aromatic- and aliphatic-rich organic constituents. The studied compounds consisted of naphthalene, phenanthrene, n-pentane...

A method for predicting organic compound volatilization rates under turbulent liquid and gas conditions is developed. The reference compounds are classified according to their physico-chemical properties. The mass transfer coefficient (K(OL)) ratios for organic solutes to the reference compounds are constant for a wide range of environmental condit...

The effects of surface area, soil organic matter (SOM) content, and cation exchange capacity (CEC) of natural soils and clays on the adsorption capacity of cationic, anionic, and nonionic surfactants in water‐solid systems were investigated based on the adsorption isotherm analysis. The sorption capacity for a cationic surfactant was proportional t...

Ca-montmorillonite (Ca-Mont) was exchanged with two quaternary amines, tetramethylammonium (TMA) chloride and hexadecyltrimethylammonium (HDTMA) bromide, to study the surfactant ion exchange effect on the pore structure, surface characteristics, and adsorption properties of montmorillonite. The revolution of both the surface area and pore structure...

The efficiency of soil remediation by surfactant washing was evaluated via the measured distribution coefficients of a number of nonpolar compounds in several soil-water mixtures. The studied compounds (contaminants) are BTEX (benzene, toluene, ethylbenzene, and p-xylene) and three chlorinated pesticides (lindane, alpha-BHC, and heptachlor epoxide)...

Volatilization rates of neat liquids (benzene, toluene, fluorobenzene, bromobenzene, ethylbenzene, m-xylene, o-xylene, o-dichlorobenzene, and 1-methylnaphthalene) and of solutes (phenol, m-cresol, benzene, toluene, ethylbenzene, o-xylene, and ethylene dibromide) from dilute water solutions have been measured in the laboratory over a wide range of a...

Ca-montmorillonite was exchanged with the metal cations, titanium, iron, and copper and the ion-exchange effects on the surface area, pore structure and adsorption property of the montmorillonite were studied. The changes in the pore structure and the surface roughness of the montmorillonite were first characterized based on the classical and fract...

The influence of suspended clay/solid particles on organic-coagulant reactions during water chlorination was investigated by analyses of total product formation potential (TPFP) and disinfection by-product (DBP) distribution as a function of exchanged clay cation, coagulant organic polymer, and reaction time. Montmorillonite clays appeared to act a...

Effects of organic solutes properties, including Henry's law constant (H), molecular weight (M), molar volume at normal boiling point (Vb), and solubility (S), on the usefulness of rate estimation by reference to a reference substance (i.e., reference substance concept) and on the evaporation rate were investigated by measuring the volatilization r...

Effects of organic solutes properties, including Henry's law constant (H), molecular weight (M), molar volume at normal boiling point (V-b), and solubility (S), on the usefulness of rate estimation by reference to a reference substance (i.e., reference substance concept) and on the evaporation rate were investigated by measuring the volatilization...