Combination of zeolitic imidazolate framework-67 and magnetic porous porphyrin organic polymer for preconcentration of neonicotinoid insecticides in river water

A water monitoring system with a new chemical sensor for oil contamination was developed. The sensor had an organic polymer film on a quartz crystal microbalance (QCM). The organic film was a hydrocarbon polymer and had high affinities for the organic compounds of petroleum products such as gasoline, kerosene, diesel oil and fuel oil. The monitoring system was composed of a sampling part, a purging part, a humidity control part and a sensor part. The oil in contaminated river water could be detected whose threshold odour number (TON) was less than three. The detecting time was less than 5 min depending on the oil kindness. This system was tested using artificially contaminated river water with the oils, to be found that the sensitivity was kept steady for longer than 6 months with 400 detections of diesel oil and heavy oil. Moreover, the oil kind could be discriminated with only one sensor device by analyzing the desorption response curves obtained by flowing a clean air on the sensor instead of the purging air.

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On-site treatment of turbid river water using chitosan, a natural organic polymer coagulant

Water Science & Technology ◽

10.2166/wst.2006.049 ◽

2006 ◽

Vol 53 (2) ◽

pp. 155-161 ◽

Cited By ~ 9

Author(s):

M. Sekine ◽

A. Takeshita ◽

N. Oda ◽

M. Ukita ◽

T. Imai ◽

...

Keyword(s):

River Water ◽

Cationic Polymer ◽

Organic Polymer ◽

Turbid Water ◽

Construction Work ◽

Aluminium Sulfate ◽

Water Conditions ◽

Treatment Agent ◽

Construction Works

Chitosan, acetylate of chitin, is a biodegradable cationic polymer. The objective of this study is to assess the applicability of chitosan as an on-site treatment agent of turbid water caused by river construction works and other diffused pollutions. The results of jar-tests indicate that floc of chitosan is much larger than that of aluminium sulfate, and turbidity treated by chitosan under moving water conditions is much lower than that of aluminium sulfate. Chitosan is applied to Imou River in Yamaguchi prefecture, where river construction work is going on. St.1 is located just below the construction work, St.2 is located about 250 m downstream from St.1, and St.3 is located about 350 m downstream from St.2. Initial turbidity of each station is 1,100, 937 and 313 NTU, respectively. By applying chitosan at St.1, turbidity of each station is drastically reduced to 1,100, 12 and 0 NTU. Chitosan could be helpful to reduce problems caused by turbidity in rivers.

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Magnetic Solid Phase Extraction Based on Nanostructured Magnetic Porous Porphyrin Organic Polymer for Simultaneous Extraction and Preconcentration of Neonicotinoid Insecticides From Surface Water

Frontiers in Chemistry ◽

10.3389/fchem.2020.555847 ◽

2020 ◽

Vol 8 ◽

Author(s):

Shirley K. Selahle ◽

Ngwako J. Waleng ◽

Anele Mpupa ◽

Philiswa N. Nomngongo

Keyword(s):

Surface Water ◽

Solid Phase Extraction ◽

Solid Phase ◽

Magnetic Solid Phase Extraction ◽

Organic Polymer ◽

Phase Extraction ◽

Simultaneous Extraction ◽

Neonicotinoid Insecticides ◽

Magnetic Solid

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Synthesis of natural proanthocyanidin based novel magnetic nanoporous organic polymer as advanced sorbent for neonicotinoid insecticides

Food Chemistry ◽

10.1016/j.foodchem.2021.131572 ◽

2021 ◽

pp. 131572

Author(s):

Yangjuan An ◽

Junmin Wang ◽

Sichang Jiang ◽

Min Li ◽

Shuofeng Li ◽

...

Keyword(s):

Organic Polymer ◽

Neonicotinoid Insecticides

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Microporous Carbon and Carbon/Metal Composite Materials Derived from Bio-Benzoxazine-Linked Precursor for CO2 Capture and Energy Storage Applications

International Journal of Molecular Sciences ◽

10.3390/ijms23010347 ◽

2021 ◽

Vol 23 (1) ◽

pp. 347

Author(s):

Mohamed Gamal Mohamed ◽

Maha Mohamed Samy ◽

Tharwat Hassan Mansoure ◽

Chia-Jung Li ◽

Wen-Cheng Li ◽

...

Keyword(s):

Electron Microscopy ◽

Energy Storage ◽

Co2 Capture ◽

Microporous Carbon ◽

Organic Polymer ◽

Bet Surface Area ◽

High Yield ◽

Metal Composite ◽

Sonogashira Coupling ◽

Zeolitic Imidazolate Framework

There is currently a pursuit of synthetic approaches for designing porous carbon materials with selective CO2 capture and/or excellent energy storage performance that significantly impacts the environment and the sustainable development of circular economy. In this study we prepared a new bio-based benzoxazine (AP-BZ) in high yield through Mannich condensation of apigenin, a naturally occurring phenol, with 4-bromoaniline and paraformaldehyde. We then prepared a PA-BZ porous organic polymer (POP) through Sonogashira coupling of AP-BZ with 1,3,6,8-tetraethynylpyrene (P-T) in the presence of Pd(PPh3)4. In situ Fourier transform infrared spectroscopy and differential scanning calorimetry revealed details of the thermal polymerization of the oxazine rings in the AP-BZ monomer and in the PA-BZ POP. Next, we prepared a microporous carbon/metal composite (PCMC) in three steps: Sonogashira coupling of AP-BZ with P-T in the presence of a zeolitic imidazolate framework (ZIF-67) as a directing hard template, affording a PA-BZ POP/ZIF-67 composite; etching in acetic acid; and pyrolysis of the resulting PA-BZ POP/metal composite at 500 °C. Powder X-ray diffraction, thermogravimetric analysis, scanning electron microscopy, transmission electron microscopy, and Brunauer–Emmett–Teller (BET) measurements revealed the properties of the as-prepared PCMC. The PCMC material exhibited outstanding thermal stability (Td10 = 660 °C and char yield = 75 wt%), a high BET surface area (1110 m2 g–1), high CO2 adsorption (5.40 mmol g–1 at 273 K), excellent capacitance (735 F g–1), and a capacitance retention of up to 95% after 2000 galvanostatic charge–discharge (GCD) cycles; these characteristics were excellent when compared with those of the corresponding microporous carbon (MPC) prepared through pyrolysis of the PA-BZ POP precursors with a ZIF-67 template at 500 °C.

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Silicon Substitution for Calcium in the Shell of the Fingernail Clam, Musculium Transversum Studied By X-Ray Analysis

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s1431927600002488 ◽

1980 ◽

Vol 38 ◽

pp. 560-561

Author(s):

Judith A. Murphy ◽

Anthony Paparo ◽

Richard Sparks

Keyword(s):

Carbonic Anhydrase ◽

River Water ◽

Food Chains ◽

Well Water ◽

Shell Formation ◽

X Ray ◽

Molluscan Shell ◽

Fingernail Clams

Fingernail clams (Muscu1ium transversum) are dominant bottom-dwelling animals in some waters of the midwest U.S. These organisms are key links in food chains leading from nutrients in water and mud to fish and ducks which are utilized by man. In the mid-1950’s, fingernail clams disappeared from a 100-mile section of the Illinois R., a tributary of the Mississippi R. Some factor(s) in the river and/or sediment currently prevent clams from recolonizing areas where they were formerly abundant. Recently, clams developed shell deformities and died without reproducing. The greatest mortality and highest incidence of shell deformities appeared in test chambers containing the highest proportion of river water to well water. The molluscan shell consists of CaCO3, and the tissue concerned in its secretion is the mantle. The source of the carbonate is probably from metabolic CO2 and the maintenance of ionized Ca concentration in the mantle is controlled by carbonic anhydrase. The Ca is stored in extracellular concentric spherical granules(0.6-5.5μm) which represent a large amount of inertCa in the mantle. The purpose of this investigation was to examine the role of raw river water and well water on shell formation in the fingernail clam.

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