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oai:figshare.com:article/33772396 2026-09-15T06:25:05Z category_34 portal_316 item_type_3 month_year_09_2026

Data Sheet 1_Influence of physicochemical properties and ionic composition on bacterial abundance in treated wastewater and post-irrigation agricultural drainage water: a case study from Al-ahsa, Saudi Arabia.pdf Mohamed AL-Bander (24913138) Asaad AL-Sayafi (24913144) Muhtadi AL-Fardan (24913147) Sallah A. Al Hashedi (23708001) Hossam Darrag (23832803) Khalid Biro Turk (24913150) Muna Zabarmawi (24913153) Environmental Science agricultural drainage coliform indicator ionic composition physiochemical properties total viable bacteria treated wastewater Introduction<p>This study investigated the relationships between physiochemical properties and bacterial abundance in treated wastewater and post-irrigation agricultural drainage water in Al-Ahsa, Saudi Arabia.</p>Methods<p>Six water samples were collected from treated wastewater (n = 3) and agricultural drainage water (n = 3), and four tap water samples were included as a microbiological reference. Major ions, trace elements, organic matter, total viable counts (TVC), and total coliforms were determined.</p>Results<p>Agricultural drainage water exhibited higher salinity, sodium dominance, chloride (1,520–1850 mg/kg), sulfate (820–980 mg/kg), and organic matter (0.65%–0.72%) than treated wastewater (chloride = 314–333 mg/kg; sulfate = 206–218 mg/kg; organic matter = 0.17–0.19%). Despite these physiochemical differences, both water sources contained comparable microbial abundance, with TVC ranging from 2.51 to 3.17 log₁₀ CFU/mL and total coliforms from 1.93 to 2.87 log₁₀ CFU/mL. Conversely, tap water contained consistently low microbial counts (0.70 log₁₀ CFU/mL). Spearman’s correlation analysis revealed significant positive relationships between total coliforms and major ions, while principal component analysis (PCA) clearly separated agricultural drainage water from treated wastewater based primarily on physiochemical parameters.</p>Discussion<p>The findings demonstrate that microbial abundance is associated with multiple interacting physiochemical factors rather than individual ions alone. The findings also provide baseline information to support water quality monitoring and sustainable wastewater reuse for agricultural irrigation in the Al-Ahsa region.</p> 2026-09-15T06:25:05Z Dataset Dataset 10.3389/fenvs.2026.1857130.s001 https://figshare.com/articles/dataset/Data_Sheet_1_Influence_of_physicochemical_properties_and_ionic_composition_on_bacterial_abundance_in_treated_wastewater_and_post-irrigation_agricultural_drainage_water_a_case_study_from_Al-ahsa_Saudi_Arabia_pdf/33772396 CC BY 4.0