Treatment of organics in reverse osmosis concentrate from a municipal wastewater reclamation plant: Feasibility test of advanced oxidation processes with/without pretreatment

Zhou, Tao; Lim, Teik−Thye; Chin, Sze-Sze; Fane, Anthony G.

doi:10.1016/j.cej.2010.11.078

Cited by 183 publications

(96 citation statements)

References 28 publications

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“…The TiO 2 photocatalysis could be inhibited via the scavenger effect by coexisting ions [10,[38][39][40]. The ions Cl − and HCO 3 − have been found to inhibit photocatalysis through the hydroxyl radical and valence band hole scavenging [10,40].…”

Section: Photocatalytic Degradation Of Crotamiton By the F9/p25 Compomentioning

confidence: 99%

Removal of Crotamiton from Reverse Osmosis Concentrate by a TiO2/Zeolite Composite Sheet

et al. 2017

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Abstract:Reverse osmosis (RO) concentrate from wastewater reuse facilities contains concentrated emerging pollutants, such as pharmaceuticals. In this research, a paper-like composite sheet consisting of titanium dioxide (TiO 2 ) and zeolite was synthesized, and removal of the antipruritic agent crotamiton from RO concentrate was studied using the TiO 2 /zeolite composite sheet. The RO concentrate was obtained from a pilot-scale municipal secondary effluent reclamation plant. Effective immobilization of the two powders in the sheet made it easy to handle and to separate the photocatalyst and adsorbent from purified water. The TiO 2 /zeolite composite sheet showed excellent performance for crotamiton adsorption without obvious inhibition by other components in the RO concentrate. With ultraviolet irradiation, crotamiton was simultaneously removed through adsorption and photocatalysis. The photocatalytic decomposition of crotamiton in the RO concentrate was significantly inhibited by the water matrix at high initial crotamiton concentrations, whereas rapid decomposition was achieved at low initial crotamiton concentrations. The major degradation intermediates were also adsorbed by the composite sheet. This result provides a promising method of mitigating secondary pollution caused by the harmful intermediates produced during advanced oxidation processes. The cyclic use of the HSZ-385/P25 composite sheet indicated the feasibility of continuously removing crotamiton from RO concentrate.

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Section: Photocatalytic Degradation Of Crotamiton By the F9/p25 Compomentioning

confidence: 99%

Removal of Crotamiton from Reverse Osmosis Concentrate by a TiO2/Zeolite Composite Sheet

et al. 2017

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“…Bagastyo et al [16] reported that iron removed a wider molecular weight (MW) range of organics in ROC from coastal and inland streams than alum under optimal coagulation conditions (1.5 mM Al at pH 5 and 1.48 mM Fe at pH 5). Zhou et al [17] found that coupling pretreatment with ferric chloride could remove a large quantity of heavy MW organics from ROC that are highly resistant to the subsequent advanced oxidation process (95% removal by the FeCl 3 /UVC/TiO 2 system).…”

Section: Introductionmentioning

confidence: 99%

“…Conventional treatment processes, such as coagulation/flocculation and adsorption, have been widely investigated for removing EfOM from ROC due to their low cost and simplicity [16,17]. Dialynas et al [18] evaluated these conventional processes using alum (Al 2 (SO 4 ) 3 ·18H 2 O), ferric chloride (FeCl 3 ), and granular activated carbon (GAC) for the treatment of ROC of membrane bioreactor (MBR) effluent.…”

Section: Introductionmentioning

confidence: 99%

Removal of Total Dissolved Solids from Reverse Osmosis Concentrates from a Municipal Wastewater Reclamation Plant by Aerobic Granular Sludge

Kim

Park

Yoon

et al. 2018

Water

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Reverse osmosis (RO) has been widely utilized in water reclamation plants and produces a concentrated brine (or reject) stream as a by-product. RO concentrates (ROC) contain vast quantities of salts and dissolved organic matter, such as biomass and humic-like substances, which hinder biological wastewater treatment (such as biological nitrogen removal). In this study, we cultivated granular sludge in an aerobic sequencing batch reactor to treat municipal wastewater with an organic loading rate of 2.1-4.3 kgCOD/m 3 day at room temperature (25 • C), and remove total dissolved solids (TDS) from ROC by biosorption, with aerobic granular sludge as a novel biosorbent. The results of the kinetic experiments demonstrated that TDS removal by aerobic granular sludge was more rapid than that by other coagulants and adsorbents (i.e., calcium hydroxide, polyaluminum chloride, activated sludge, powdered activated carbon, granular activated carbon, and zeolite) under optimal treatment conditions. The biosorption of TDS on the aerobic granular sludge was well-modeled by the Lagergren first-order model, with a maximum biosorption capacity of 1698 mg/g. Thus, aerobic granular sludge could be effective as a regenerable biosorbent for removing the TDS in ROC from municipal wastewater.

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“…Photocatalytic degradation [24,53], ultrasound combined with photo-Fenton treatment [34], advanced oxidation processes [57], ozonation [41] and adsorption [20] are different methods used to remove the pesticides from water. One of the most widely used techniques is adsorption by activated carbon (AC) coming from agricultural wastes which show greater potential for the treatment of wastewaters due to very large quantities, easy to get and very low costs [43,39].…”

Section: Introductionmentioning

confidence: 99%

Preparation of environmentally friendly activated carbon for removal of pesticide from aqueous media

Mohammad

Ahmed

2017

Int J Ind Chem

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The preparation of eco-friendly low-cost silkworm feces activated carbon (SFAC) for the removal of oxamyl pesticide from aqueous solution has been investigated in batch experiments. Structure and morphology of SFAC were characterized by Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), field emission scanning electron microscopy (SEM). The specific surface area and mean pore diameter were obtained as 75.219 and 0.2035 cm 3 g -1 , respectively. The effect of different physicochemical parameters such as initial oxamyl concentrations, activated carbon dose and contact time has been studied. The results showed that the oxamyl removal on SFAC was unaffected in the pH range of 2-10. The percent removal of oxamyl onto SFAC was 99.48% from aqueous solutions. The adsorption process attained equilibrium within 120 min of contact time. Equilibrium data were analyzed by the Freundlich, Langmuir and Dubinin-Radushkevich (D-R) isotherm models. Freundlich isotherm provided the best fit to the equilibrium data. Adsorption kinetic was fitted well by the pseudo-secondorder kinetic model. The results revealed that SFAC could be used a low-cost and eco-friendly alternative to other adsorbents for the oxamyl removal from aqueous solution.

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Treatment of organics in reverse osmosis concentrate from a municipal wastewater reclamation plant: Feasibility test of advanced oxidation processes with/without pretreatment

Cited by 183 publications

References 28 publications

Removal of Crotamiton from Reverse Osmosis Concentrate by a TiO2/Zeolite Composite Sheet

Removal of Crotamiton from Reverse Osmosis Concentrate by a TiO2/Zeolite Composite Sheet

Removal of Total Dissolved Solids from Reverse Osmosis Concentrates from a Municipal Wastewater Reclamation Plant by Aerobic Granular Sludge

Preparation of environmentally friendly activated carbon for removal of pesticide from aqueous media

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