The Adsorpting and Releasing of Toxic Heavy Metal Cations by Sewer-Mud Colloid, in Hochi Minh City Canals | Chapter 6 | Emerging Challenges in Environment and Earth Science Vol. 5

 We have drawn the following findings concerning the adsorption and release of heavy metal cation in various environmental pH settings based on the results of 11 experiments: 1. The capacity for adsorption and release increases with increasing cation concentration in the medium (soil solution). However, depending on the concentration of the metal in the solution, corresponding to a specific pH of the environment, with a specific period, this connection follows a specific curve for each particular type of heavy metal cation. 2. Both colloidal bottom mud and colloidal alluvial soil rapidly adsorb heavy metal cations, resulting in unique characteristic curves. 3. Colloidal bottom mud and colloidal alluvium include heavy metal cation cations that are released in the field 2 to 6 hours after their adsorption capacity. We only looked at the absorption and comparison of Swere slud adsorbed with 7 hazardous cations. For instance: Cation: Were-Mud Fe2+ Colloid, the adsorption capacity of the adhesive occurs quickly in the range of 0–6 hours. Colloid has the maximum adsorption capacity at pH = 5, followed by pH = 4 and pH = 3. Colloid stops adsorbing and starts to release Fe2+ from the colloidal soil between the hours of 6 and 12. At pH = 5, however, the capacity to release is maximum. When the pH is the same, Compared to the bottom mud colloid, the alluvial soil colloid absorbed Fe2+ ions more strongly. Additionally, the pH of the medium has a significant impact on the soil colloid's capacity to adsorb and release Fe2+. An inflection point in the curve can be found at Fe2+=248ppm, 7h. The maximum peak (Cmax) is 700 ppm at C (Fe2+). After an hour, the ability to release Fe2+ ions is at its peak; between two and four hours later, it starts to decline.  

Author(s) Details:

Ba Le Huy,
Ho Chi Minh City University of Food Industry (HUFI), Viet Nam and Faculty of Biology and Environment, University of Food Industry, Ho Chi Minh City, Viet Nam.

Hoan Nguyen Xuan,
Ho Chi Minh City University of Food Industry (HUFI), Viet Nam and Faculty of Biology and Environment, Ho Chi Minh City University, Viet Nam.

Phong Nguyen Tan,
Faculty of Biology and Environment, Ho Chi Minh City University, Viet Nam.

Please see the link here: https://stm.bookpi.org/ECEES-V5/article/view/8152