adsorption and water treatment of ca (ii) and mg (ii) hardness were investigated via adsorption of metal ions onto commercial polyacrylic acid hydrogel beads as a novel sorbent for metal ions (ca2+, mg2+) removal and water treatment. batch equilibrium technique was carried out under the influence of solution ph, contact time, sorbent dosage, initial metal concentration and competitive study. th...

Chemical coagulation is commonly used in raw water and wastewater treatment plants for the destabilisation of pollutants so that they can be removed in the subsequent separation processes. The most commonly used coagulation chemicals are aluminium and iron metal salts. Electrocoagulation technology has also been proposed for the treatment of raw waters and wastewaters. With this technology, met...

An increasing drive for water efficiency is leading to a corresponding growing interest in a variety of water recycling initiatives to assist in water efficiency efforts. While available knowledge and technologies exist to provide suitable fit-for-purpose recycled water, concern exists relating to water quality issues, particularly microbial pathogens and chemicals-of-concern. At times these co...

Introduction Petroleum refining utilize large quantities of water for desalting, distillation, thermal cracking, catalytic and treatment processes to produce useful products [liquefied petroleum gas (LPG), gasoline, jet fuel, diesel, asphalt and petrochemical feedstock] 1-3. Refining process generates wastewater (0.4-1.6 times the volume of crude oil processed)4. Discharge of untreated petroleu...

This study aims to evaluate micropollutant occurrence and removal in a low-middle income country (LMIC) by investigating the of 28 chemicals from different classes (triclosan, 15 polycyclic aromatic hydrocarbons (PAHs), 4 estrogens 8 polybrominated diphenyl ether (PBDE) congeners) three technologically diverse full-scale Brazilian wastewater treatment plants (WWTPs). These were detected at conc...

In this research, a response surface methodology (RSM) was used to investigate the effects of independent parameters (pH, contact time, temperature, adsorbent dosage, and initial concentration of pollutant), their simultaneous interactions, and quadratic effects on crystal violet adsorption onto two starch based materials in the form of batch experiments. The characterizing results indicated th...

A laboratory study to optimize a low cost technology for small scale drinking water treatment in rural Bangladesh Harmen van der Laan Abstract High concentrations of arsenic in drinking water form a major threat for public health in more than 70 countries worldwide. The situation is Bangladesh is seen as the worst incidence of arsenic poisoning: it is believed that 30 million people in Banglade...

The treatment and reuse of industrial wastewater plays a foremost role in succeeding environmental protection water security. electrochemical technology has attracted great deal attention because its compact, high particulate removal, free from chemicals, automation, minimum sludge generation. objective the study is to review existing literature on COD (Chemical oxygen demand) removal various e...