Role of surface water testing in water quality assessment

Category: Water | Tags: #  
Due to the nature of water cycle of Earth, surface water play a crucial role in global climate.
Terrestrial life critically relies upon surface water availability for domestic use, agriculture, and industry, which are directly affected by changes in water mass exchange with the lower atmosphere.
We use water quality information to assess current condition and patterns over time and area in order to understand and manage the influence of factors such as land use and climate change.  Data collected is compared to a range of guidelines for various human uses and environmental needs.

Climate change is happening gradually, mainly in a period following the Industrial Revolution and is caused by a human activity, primarily the burning of fossil fuels that pump carbon dioxide (CO2) and other greenhouse gases into the atmosphere. As one of the effects is particularly the temperature, aka heating of the atmosphere, oceans and Earth’s surface water.

Changes in water chemistry
With monitoring of our regional surface water we can create better forecasts of future changes and make our planning & investments in advance.
Basically, collected information include:
  • chemical characteristics – e.g. dissolved oxygen, acidity (pH), salinity, nutrient concentration and other contaminants
  • physical characteristics    – e.g. temperature, colour, light, sediment suspended in the water (turbidity)
  • biological characteristics – e.g. bacteria and algae.
There is several ways to perform crucial water quality assessment:
direct
measurement
“on the spot”
with portable meters
continuous
monitoring
logged at regular
intervals over an extended period
collection of
water samples
laboratory analysis to
be done afterwards

HI98494

Portable pH/EC/DO Meter
with Bluetooth
BUY- HI98494
Functional and accurate, this meter is capable of testing 12 different water quality parameters using pH, EC, and optical DO sensors. Transfer data to a smart device for review or sharing with the integrated Bluetooth connection and Hanna Lab App. Device is waterproof ( meter rated IP67, probe rated IP68). It has automatic interval logging of up to 45,000 samples or log-on-demand. HI98494 is perfect for environmental and industrial professionals.

HI9829

Multiparameter pH/ISE/EC/DO/
Turbidity Waterproof Meter
with GPS option
BUY- HI9829
The HI9829 is a waterproof portable logging multiparameter meter that monitors up to 14 different water quality parameters. The microprocessor based multi-sensor probe allows for the measurement of key parameters including pH, ORP, conductivity, dissolved oxygen, turbidity, ammonium, chloride, nitrate, and temperature. The probe transmits readings digitally with options to log data while disconnected from the meter.
An optional GPS provides location tracking of measurements. The complete system is simple to setup and easy to use. The HI9829 is highly customizable and supplied with all necessary accessories, packaged in a durable carrying case.
Play Video
Two probes to choose from (Basic or Logging)
The HI7609829 (basic) and HI7629829 (logging) are multiparameter probes for use with the HI9829 portable meter.  It is an option to choose which probe will be supplied with the HI9829.
By default the HI9829 and corresponding probe will be supplied with a pH/ORP, conductivity and dissolved oxygen sensors. Either probe can be upgraded to measure turbidity with  a turbidity/conductivity sensor.
Easy measurement of turbidity right on the spot!

Color Coded, Field Replaceable Sensors

Color Coded, Field Replaceable Sensors
ISE
A choice of three ion selective electrodes (ISE) is available for constant reporting of common surface water contaminants. Nitrate, ammonium and chloride ISEs are available.
HI7609829-10 Ammonium ISE
HI7609829-11 Chloride ISE
HI7609829-12 Nitrate ISE

HI98198

Portable Optical DO (opdo) meter
BUY- HI98198
HI98198 uses a luminescent optical method for the measurement of dissolved oxygen in water and wastewater.
This professional, waterproof meter complies with IP67 standards and measures:
  • DO
  • barometric
  • pressure
  • BOD
  • temperature
The HI98198 is supplied complete with all accessories including probe, smartcap sensor with built in RFID, and a rugged carrying case.
Advantages:
HI98198 Dissolved Oxygen Meter has many advantages over other Galvanic and Polarographic Dissolved Oxygen Meters. This meter uses HI764113 Rugged Optical Dissolved Oxygen Probe for Dissolved Oxygen measurement which has following benefits:
  • No membranes
  • No electrolytes
  • No oxygen consumption
  • No flow dependence or minimum flow rate
  • Fast and stable readings
  • Minimal maintenance

HI801

Spectrophotometer iris

BUY- HI801
The HI801 iris is a sleek and intuitive spectrophotometer that allows for measurement of all wavelengths of visible light.
Customize your methods, take a wide range of measurements, and feel confident in your testing accuracy with iris.
  • iris features precise wavelength selection between 340 nm to 900 nm for complete method compliance and accuracy that is necessary in industries like professional laboratories, water treatment facilities, wineries, and more.
  • Results are consistent and accurate regardless of throughput with the high quality and uniquely designed optics system.
  • Customization options include multiple cuvette shapes and sizes, custom calibration curves, and methods.
Parameters that can be measured with spectrophotometrical methods:
  • Alkalinity
  • Ammonia
  • Calcium
  • Free Chlorine
  • Total Chlorine
  • Chemical Oxygen Demand (COD)
  • Copper
  • Total Hardness
  • Iron
  • Nitrate
  • Nitrite
  • Total Nitrogen
  • Dissolved Oxygen
  • Phosphate
  • Reactive Phosphorus
  • Surfactants Anionic

Despite mentioned parameters there are more than 90 other parameters that can be measured on our spectrophotometer iris.

Author:
Nives Vinceković Budor, mag.ing.chem.ing.
Sources: