@inproceedings{fdi:010095074,
  title = {{I}mprovement of contaminant retention with the use of biochar in the groundwater infiltration basin of {K}orba ({T}unisia) [r{\'e}sum{\'e}]},
  author = {{H}ammecker, {C}laude and {M}aalaoui, {H}. and {H}maied, {A}. and {L}achaal, {F}.},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he overexploitation of the {K}orba aquifer ({C}ap {B}on, {N}orth {T}unisia) has led to the drawing down of its static water level and the degradation of its quality due to the intrusion of saline water from the sea. {T}o address this situation, treated wastewater is used for the artificial recharge of the aquifer through three infiltration basins. {T}reated wastewater is known to carry various emerging contaminants and pharmaceuticals as they are often not retained in traditional wastewater treatment plants. {T}o tackle this problem the use of biochars is often recommended to conduct a second stage low-cost decontamination strategy. {I}ndeed, biochar can be produced easily at a low cost, with different agricultural residues. {I}n this study, the impact of biochar derived from {R}osemary, {B}amboo, {S}t. {J}ohn's {W}ort, {O}live, {C}ypress, and {P}alm {T}rees on the mobility and retention of emerging contaminants was evaluated. {T}he first stage of this work was to evaluate the potential retention capacity of the different biochars produced in a low-cost metallic kiln with local biomass residues. {T}herefore we used {M}ethylene {B}lue ({MB}) as a proxy for organic contaminants to establish adsorption isotherms to quantify their respective specific surface area and adsorption capacities. {T}he adsorption isotherms at 20°{C} were established to evaluate their respective specific surface areas and were fitted to different adsorption models. {T}he surface functional groups of biochars were characterized by {FTIR} spectroscopy. {T}he analysis of the results showed that the biochar obtained from {R}osemary, {B}amboo, and {S}t. {J}ohn's {W}ort exhibited remarkable elimination and better adsorption capacity with values of 1.6g/{L} for {R}osemary, 0.4g/{L} for {S}t. {J}ohn's {W}ort, and 0.2g/{L} for {B}amboo. {A}n average adsorption capacity was observed with 0.09g/{L} for {C}ypress, 0.055g/{L} for {O}live, and low adsorption with a value of 0.03g/{L} for traditional {O}live and {P}alm {T}rees. {T}he second stage was to test the dynamic retention properties of biochar on soil monolith experiments, where the {MB} elution curves were analyzed with and without the addition of biochar. {T}he presence of biochar in the soil monoliths drastically reduced the retention of {MB}, demonstrating its efficiency as an adsorbent filter. {T}hese results underscore the strong potential of biochar in water treatment to enhance quality by reducing pollution.},
  keywords = {{TUNISIE} ; {KORBA}},
  numero = {},
  pages = {{EGU}24--11014 [1 ]},
  booktitle = {},
  year = {2024},
  DOI = {10.5194/egusphere-egu24-11014},
  URL = {https://www.documentation.ird.fr/hor/fdi:010095074},
}