Scholarlink

<p>Water scarcity and lack of access to safe drinking water pose significant threats to human health in many countries. While sand filtration is a cost-effective method to improve water quality, its microbial removal efficiency is limited. This study aimed to develop silver-loaded carbon-coated sand filtration medium capable of reducing microbial contaminants to safe drinking water levels. Carbon-coated sand was synthesized from table sugar and natural sand at various sand-to-sugar ratios (4:1, 2:1, 1:1), pyrolysis temperatures (350, 450, 500, and 550&#xa0;°C), and pyrolysis times (45, 60, and 90&#xa0;min). Surface area was assessed using methylene blue (MB) adsorption to determine optimal preparation conditions. Two silver-loaded variants, silver-decorated (SDCCS) and silver-impregnated (SICCS), were produced from the best-performing formulation (2:1 ratio, 550&#xa0;°C, 45&#xa0;min). Bare sand, carbon-coated sand, SDCCS, and SICCS were tested for bacterial inactivation in batch experiments at different contact times (30&#xa0;s, 1, 2, 4, and 24&#xa0;h) using <i>E. coli</i> ATCC 2452. The SICCS achieved complete <i>E. coli</i> removal within 1&#xa0;h using 0.5&#xa0;g per 10&#xa0;mL, with disinfection maintained for 24&#xa0;h. Bare sand, carbon-coated sand, and SDCCS were ineffective at achieving safe drinking water. Column filtration with SICCS and sand achieved effective disinfection while keeping silver concentrations in the effluent within safe limits for human consumption. Silver-impregnated carbon-coated sand is a promising easy to prepare material for safe drinking water treatment. It is simple to transport, store, and use, offering an effective solution for microbial contamination.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Effectiveness of Ag-doped carbon-coated sand in removing E. coli from drinking water

  • 期刊论文

  • 发表日期：

    2025年12月16日

查看全文
  • A. A. Albalasmeh,
  • B. Elshqeirat,
  • M. H. Gharaibeh,
  • A. El Hanandeh

摘要

Water scarcity and lack of access to safe drinking water pose significant threats to human health in many countries. While sand filtration is a cost-effective method to improve water quality, its microbial removal efficiency is limited. This study aimed to develop silver-loaded carbon-coated sand filtration medium capable of reducing microbial contaminants to safe drinking water levels. Carbon-coated sand was synthesized from table sugar and natural sand at various sand-to-sugar ratios (4:1, 2:1, 1:1), pyrolysis temperatures (350, 450, 500, and 550 °C), and pyrolysis times (45, 60, and 90 min). Surface area was assessed using methylene blue (MB) adsorption to determine optimal preparation conditions. Two silver-loaded variants, silver-decorated (SDCCS) and silver-impregnated (SICCS), were produced from the best-performing formulation (2:1 ratio, 550 °C, 45 min). Bare sand, carbon-coated sand, SDCCS, and SICCS were tested for bacterial inactivation in batch experiments at different contact times (30 s, 1, 2, 4, and 24 h) using E. coli ATCC 2452. The SICCS achieved complete E. coli removal within 1 h using 0.5 g per 10 mL, with disinfection maintained for 24 h. Bare sand, carbon-coated sand, and SDCCS were ineffective at achieving safe drinking water. Column filtration with SICCS and sand achieved effective disinfection while keeping silver concentrations in the effluent within safe limits for human consumption. Silver-impregnated carbon-coated sand is a promising easy to prepare material for safe drinking water treatment. It is simple to transport, store, and use, offering an effective solution for microbial contamination.