This study investigates the capability of Thuja occidentalis leaves carbon powder (TOLC) as a viable adsorbent for the expulsion of chromium(VI) from aqueous solutions. By batch mode, the removal percentage of Cr(VI) is observed to be pH perceptive and furthermore relies upon the time of equilibration, amount of the TOLC adsorbent and Cr(VI) concentration. TOLC adsorbent before and after adsorption of Cr(VI) was characterized with FTIR, SEM and EDX. Adsorption isotherm results divulge that the Langmuir model was a better fit. The kinetic studies divulge that the pseudosecond-order model was the best fit. TOLC adsorbent can be easily regenerated and utilised for several adsorption/ desorption cycles.
Water Quality Index-WQI is useful to transfer complex information of the groundwater quality data into comprehensible and useable data. In this research work, the investigation is carried out by collecting 66 groundwater samples and amalgamating nine water quality parameters for evaluation of groundwater utilizing WQI in pre-as well as post-monsoon of a year in the villages of Gara Mandal of Srikakulam District in Andhra Pradesh. The results confirmed that most of the groundwater sample locations (54.5% of groundwater samples) showed poor quality in both pre-as well as post-monsoon seasons. On the other hand, the correlation matrix indicates the strong positive correlation exists between the chemical parameters like calcium ion and magnesium ion with chloride, sulphate as well as nitrate ion represents that groundwater in the sampling locations has been polluted due to geological conditions, seepage of sewage and anthropogenic activities. Hence a proper treatment is required before utilized for drinking.
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