Can polyaluminium chloride and anionic polyacrylamide remove CD 2+ and Zn 2+?

Water treatment residuals produced after addition of polyaluminium chloride and anionic polyacrylamide (PAC-APAM WTRs) were evaluated for the potential to remove Cd 2+ and Zn 2+ from aqueous solutions by batch adsorption studies.

Can anionic polyacrylamide be used as a coagulant in water treatment sludge?

Also, using anionic polyacrylamide (APAM) as a coagulant in the dewatering process of water treatment sludge has been a regular practice to accelerate the dewatering process and decrease the size of dewatering tanks or ponds in large-scale drinking water treatment plants.

Does pH affect PAC-Apam adsorption?

The effects of pH on Cd or Zn adsorption onto PAC-APAM WTRs were investigated by batch studies under the following adsorption conditions: initial concentrations of 100mg/L for Cd 2+ and 40 mg/L for Zn 2+, dosage of 0.1 g PAC-APAM WTRs, solution volume of 0.1 L, temperature of 20 °C, adsorption time of 6 h, and pH ranging from 3 to 9.

Do PAC-Apam WTRS adsorb more ions?

The D-R isotherm model study showed that the adsorption process was chemically controlled and the PAC-APAM WTRs could have the ability to adsorb more of both ions than the maximum monolayer adsorption capacity in long-term adsorption.

What is the maximum adsorption capacity derived from Langmuir modeling?

The maximum adsorption capacity obtained from Langmuir modeling was 85.5 mg Cd 2+ /g PAC-APAM WTRs or 25.6 mg Zn 2+ /g PAC-APAM WTRs. A Dubinin-Radushkevich (D-R) model study showed that the adsorption process was chemically controlled.

What is the maximum adsorption capacity obtained from isotherm studies?

The maximum adsorption capacity obtained from isotherm studies was 85.5 mg Cd 2+ /g PAC-APAM WTRs or 25.6 mg Zn 2+ /g PAC-APAM WTRs which was similar to the lab measured value.