Water and Wastewater Treatment Laboratory

The research facilities for water and wastewater treatment are mainly located in Water and Wastewater Treatment Lab (2,077 ft2; Nedderman Hall B06) in the Department of Civil Engineering at the University of Texas at Arlington. The lab is housed with various analytical and environmental instruments; fabrication, test, and measurement facilities; and general lab equipment and devices. The lab and facility are shared with all the environmental faculty in the department and are open to the various university communities for water and wastewater research studies.




High Performance Liquid Chromatography (HPLC)

HPLC instrument is used to separate, identify, and quantify specific components in mixtures. In particular, HPLC instrument is capable of specifying individual organic chemicals in water. The lab has two HPLC systems; Agilent 1200 HPLC with UV and suppressed conductivity detectors and Agilent 1260 Infinity II HPLC with UV and fluorescence detectors. The HPLC systems have autosampler.

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Ion Chromatography (IC)

IC is used to separate, identify, and quantify specific ionic species in water. The IC system (Metrohm 930 Compact IC Flex) has both anion and cation measurement capacities and autosampler.

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UV-Visible Spectrophotometer (UV-Vis)

UV-Vis spectrophotometer is an analytical instrument used to measure the absorbance of light in the UV and Vis regions. It is widely used to identify and quantify substances which absorb UV and Vis and thus to characterize their optical properties. The lab has two UV-Vis systems (Shimadzu 2450 and VWR P4), which can measure light absorbance via full UV-Vis wavelength scan and also have an integrating sphere for solid sample measurement.

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UV Crosslinker

UV crosslinker (Fisher Scientific) is a benchtop instrument engineered for providing a safe, time-efficient solution with a controlled amount of UV radiation. Equipped with shortwave 254 nm, 306 nm, and 368 nm UV bulbs, the unit offers both energy and time operation modes, intuitive controls, and a UV-protective viewing window for added safety. Ruggedly built with anodized aluminum housing and safety interlocks, this crosslinker provides reproducible results, flexible wavelength support, and a small footprint optimized for research and diagnostics workflows.

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Photocatalytic Xenon Lamp Light Source System

Photocatalytic xenon lamp light source system (CEL-HXF(UV)300-S) employs a high-intensity xenon arc lamp that delivers full-spectrum illumination closely mimicking natural sunlight (from UV through visible to near-infrared wavelengths). Designed with features such as adjustable spot size, high-power stability, efficient cooling, and compatibility with optical filters and steering lenses, this system provides focused, uniform irradiation ideal for driving photocatalytic reactions like photochemical catalysis, pollutant degradation, water treatment, photochemical synthesis, and biological illumination. The Light Source System also comes with various light filters such as UV-A, UV-B, UV-C, and UV block filter to irradiate samples with required lights.

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Freeze Dryer

Benchtop freeze dryer (FreeZone, Labconco) is a compact, high-performance lyophilization system tailored for labs. Its upright stainless-steel collector coil can hold up to 2.5 L of ice before defrosting and is chilled to an ultra-low –84 °C using an environmentally friendly HCFC/CFC-free refrigeration system—ideal for sensitive or low-eutectic-point samples. The unit features Lyo Works™ OS, a user-friendly 5″ touchscreen interface offering real-time control of collector temperature, vacuum, and defrost cycles, along with data logging and remote alerts.

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Planetary Ball Mill

Planetary ball mill (MSK SFM 3, MTI Corporation) is a compact, high speed planetary ball mill featuring a powerful 3D motion mechanism—combining rotation, vibration, and oscillation—to deliver enhanced impact energy for efficient milling and homogenization. Capable of both dry and wet processing, it is ideally suited for producing small sample quantities in materials research with precision and speed. The unit supports adjustable speed up to 1,200 rpm for effective nano- to micro-scale milling.

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Contact Angle Goniometer

Contact angle goniometer (OCA 15EC, DataPhysics Instruments) is a measuring device for professional contact angle measurements and drop shape analysis, which can be used to measure material surface wettability and liquid surface tension. The sample table of the OCA 15EC can slide freely in X- and Y-direction and is locked into position with its switchable magnetic base. In Z-direction the sample table is adjustable using precision mechanics with a hand wheel. The fast 6.5-fold zoom lens with manual focus and adjustable observation angle in combination with the USB 3 camera ensures pin-sharp drop images and facilitates the effortless analysis with the software. With a double direct dosing system, liquids can be positioned and dosed with two electronic syringe modules. The LED-lighting with manual- and software-controlled intensity includes automatic temperature drift compensation.

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Cross-Flow Membrane Filtration System

Sterlitech cross‑flow membrane filtration system is a compact, benchtop-scale platform designed for versatile membrane separation applications, ranging from microfiltration to reverse osmosis. Engineered with an ergonomic "plug-and-play" interface, this system accommodates flat-sheet test cells and modules for RO, NF, UF, or MF processes. It offers precise control with built-in digital pressure and flow sensors, a high-efficiency heat exchanger, and flexible flow paths.

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Membrane Fabrication Devices

Membrane fabrication devices include a compact dual‑shaft planetary vacuum mixer (MSK‑SFM‑16, MTI Corporation) and a mini tape casting coater (MSK-AFA-HC100, MTI Corporation), commonly used in membrane preparation workflows. The dual‑shaft planetary vacuum mixer is a benchtop dual-axis mixer equipped with a built-in vacuum pump that removes air bubbles while delivering uniform slurry mixing. Featuring programmable speed segments (0–600 rpm) and compatible with glove box use, it ensures homogeneous dispersion of membrane casting solutions. The mini tape casting coater offers precision coating on a heatable vacuum chuck (up to 100 °C) with micrometer-controlled film applicators. It supports precise deposition of thin polymer or conductive ceramic films—with ±2 µm thickness accuracy—on substrates, suitable for integration in glove box environments for controlled atmosphere processing.

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The labs are also equipped with 6 fume hoods, 2 thermostat chambers (each 64 ft2), 2 furnace, 3 ovens, 1 anaerobic chamber, and 1 autoclave, and possess many small experimental devices for general environmental research studies including rotary shaker and mixer, high-speed centrifuge, solid phase extractor, pH meter, conductivity meter, bio safety cabinet, deionized water purifier, and milli-Q water producer.


High-Speed Centrifuge

High-speed centrifuge (Thermo Scientific Sorvall ST1R Plus) is a compact, benchtop refrigerated centrifuge engineered for high-performance applications. Boasting a maximum speed of 15,200 rpm and achieving up to 25,830G relative centrifugal force, it can accommodate a versatile range of rotors—supporting up to 1.6 L capacity or 76 tubes under biocontainment lids.

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Biological Safety Cabinet

Biological safety cabinet (Thermo Scientific 1300 Series Class II, Type A2) delivers reliable laboratory containment with advanced airflow technologies for enhanced protection. Featuring the innovative SmartFlow™ system, the cabinet automatically compensates for filter loading using dual DC motors—ensuring consistent inflow/downflow velocities and optimal safety throughout filter life.

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