Response surface methodology investigation into the interactions between arsenic and humic acid in water during the coagulation process

Watson, Malcolm; Tubić, Aleksandra; Agbaba, Jasmina; Nikić, Jasmina; Maletić, Snežana; Jazić, Jelena Molnar; Dalmacija, Božo

doi:10.1016/j.jhazmat.2016.03.002

Cited by 55 publications

(34 citation statements)

References 25 publications

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“…Peatlands and constructed wetlands were investigated in regard to the removal of Sb from mining waste water via adsorption processes [13,14]. Among the developed technologies, the coagulation method remains popular worldwide due to its low cost, high efficiency, simple design and operation, and good matching with other water treatment equipment [15,16]. In addition, coagulation can achieve in situ removal of Sb in the case of emergency pollution incidents.…”

Section: Introductionmentioning

confidence: 99%

An Effective Method to Remove Antimony in Water by Using Iron-Based Coagulants

Cheng¹,

Wang²,

Li³

et al. 2019

Water

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The effectiveness of antimony (Sb) removal by using iron-based coagulants was investigated in this study. The effects of pH, coagulant types and dose, equilibrium concentration, co-existing humic acid (HA) and anions, and oxidation process were studied. Effective Sb removal was achieved by using Fe(III)-based coagulants. However, the removal efficiency of Sb by using Fe(II)-based coagulants was very low. The removal capacity of Sb fitted the Sips adsorption isotherm well, which revealed that the heterogeneous adsorption process onto the formed hydrous ferric oxide played an important role in Sb removal, and the mechanism was further supported by Fourier transform infrared spectrum analysis. Sb removal was inhibited by the presence of HA and phosphate, as well as oxidation and aeration. Therefore, coagulation by using Fe(III)-based coagulants without oxidation is an effective and promising method for removing Sb in aqueous solution.

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Section: Introductionmentioning

confidence: 99%

An Effective Method to Remove Antimony in Water by Using Iron-Based Coagulants

Cheng¹,

Wang²,

Li³

et al. 2019

Water

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“…The influence of the presence of some anions (Cl -and SO 4 2-) into water on the electrocoagulation process was achieved by comparison between two different supporting electrolytes, i.e., sodium chloride, sodium sulphate and a mixture of sodium chloride and sodium sulphate.…”

Section: Methodsmentioning

confidence: 99%

“…Natural organic matter (NOM) present in raw water in high concentration beside other problems that could raise along treatment flow, the disinfection by-products formation. Also, NOM is able to interact with arsenic and form soluble complexes [4], which could hamper treatment process.…”

Section: Introductionmentioning

confidence: 99%

“…The studies regarding the interactions between arsenic and humic acid (HA) as the main component of NOM in order to optimize the classical coagulation using ferric chloride have been reported [4,5].…”

Section: Introductionmentioning

confidence: 99%

“…The inhibition effect of HA presence on the arsenic sorption on iron oxides was demonstrated [4,5]. The conventional coagulation process is considered to be appropriate for the removal of both arsenic and NOM in a single step [4].…”

Section: Introductionmentioning

confidence: 99%

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Drinking water treatment by iron anode-based electrocoagulation: humic acids and arsenic removal

Pop

Bordianu

Pode

et al. 2016

WIT Transactions on Ecology and the Environment

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Electrocoagulation (EC) represents an alternative to the conventional coagulation process in water treatment in low-capacity plants. Besides the electrode materials, the performance of electrocoagulation is strongly dependent on the raw water matrix. A systematic study has been conducted in this paper in order to optimize the electrocoagulation process operation using iron anode for groundwater with high organic loading and arsenic. The optimization of electrocoagulation parameters was performed, focusing on initial concentration of arsenic and humic acid, current density, the presence of major ions dissolved in water (SO4 2-, Cl -). Humic substances were quantified in terms of absorbance at 254 nm and total organic carbon (TOC) and the arsenic concentration has been assessed in water samples by atomic absorption spectrometry. To elucidate some mechanistic aspect, SEM/EDAX analysis was performed. A systematic study based on various raw water characteristics has been performed for EC process based on iron electrodes to determine the best operating conditions and also, to identify the limits of this process. The specific energy consumption was calculated in order to demonstrate also the process viability from economical point of view. Various treatment scenarios in relation to raw water characteristics and operation conditions were applied in order to determine the optimal conditions regarding process parameters correlated to the range of water characteristics for the drinking water treatment.

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Metolachlor metal–organic framework nanoparticles for reducing leaching, ecotoxicity and improving bioactivity

Ren

et al. 2022

Pest Management Science

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BACKGROUND The adverse effects of pesticides has led to a series of ecological, environmental and public health issues. Amide herbicides are an important agrochemical, yet many are prone to leach and pollute the environment, which limits their further application. In this study, metolachlor (METO) was selected as a model pesticide and a controlled released nanoparticle (NP) system was constructed employing a zeolitic imidazolate framework‐8 hybrid inorganic–organic porous material (METO@ZIF‐8). RESULTS The synthesis parameters of METO@ZIF‐8 were optimized, and the loading content of METO@ZIF‐8 was maximized by a central composite design of response surface test. The NPs were regular dodecahedron with uniform size (mostly 54.3 nm diameter). METO@ZIF‐8 had high specific surface area and good dispersal in water. Moreover, it endowed the active ingredient with a pH‐responsive release property. The nanocarrier effectively improved the adsorption capacity of METO in soil and reduce the leaching by 10.3–21.7%. Pot experiments suggested that the control effect of METO@ZIF‐8 was 16.6 and 48.4% higher than that of METO emulsifiable concentrate (EC) and METO technical concentration (TC) at the recommended dose. Based on the excellent controlled release profiles, METO@ZIF‐8 did not affect corn plant growth and significantly reduced the risk of phytotoxicity induced by METO. METO@ZIF‐8 effectively reduced acute toxicity in zebrafish compared with METO EC. CONCLUSION This study explored the fabrication of a nanocarrier for improving the efficacy and promoting the environmental safety of leachable amide herbicides. © 2022 Society of Chemical Industry.

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Response surface methodology investigation into the interactions between arsenic and humic acid in water during the coagulation process

Cited by 55 publications

References 25 publications

An Effective Method to Remove Antimony in Water by Using Iron-Based Coagulants

An Effective Method to Remove Antimony in Water by Using Iron-Based Coagulants

Drinking water treatment by iron anode-based electrocoagulation: humic acids and arsenic removal

Metolachlor metal–organic framework nanoparticles for reducing leaching, ecotoxicity and improving bioactivity

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