A review on heavy metal pollution, toxicity and remedial measures: Current trends and future perspectives

Geopolymer for use in heavy metals adsorption, and advanced oxidative processes: A critical review

Geopolymer-zeolite composites: A review

Possible applications of coal fly ash in wastewater treatment.

A review on recent developments in the adsorption of surfactants from wastewater.

A review on geopolymers as emerging materials for the adsorption of heavy metals and dyes

Coarse-grained CFD-DEM simulations of fluidization with large particles

The adsorbent pore structure significant to enhanced adsorption capacity of Cr (VI) from dilute aqueous solution is evaluated. As reference, low-cost micro-mesoporous activated carbon (AC) of high basicity, mesoporosity centred about 2.4 nm, and effective microporosity centred about 0.9 nm was tested for removal of Cr (VI) from dilute aqueous solution in batch mode. At pH 2 the low-cost AC exhibited highly improved Langmuir Cr (VI) capacity of 115 mg/g which was competitive to high performance commercial AC. A Comparison with treated characterization results of literature adsorbents/ACs showed that moderate to high effective micropore volume of average pore-size Original Research Article Mukosha et al.; CSIJ, 19(4): 1-12, 2017; Article no.CSIJ.34082 2 about 0.9 ± 0.1 nm is critical for increased adsorption capacity of Cr (VI) from dilute aqueous solutions. The mesostructure of the tested low-cost AC was associated with rapid kinetics that was fitted by the Pseudo-second kinetics model. While Biot numbers suggested slight significant contribution of intraparticle diffusion. It is hoped that this study may be a useful contribution to development of effective adsorbents for the efficient abatement of toxic Cr (VI) from wastewater and water.

Effective Microporosity for Enhanced Adsorption Capacity of Cr (VI) from Dilute Aqueous Solution: Isotherm and Kinetics

Modeling energy requirements for a biogas-supported decentralized Water treatment systems for communities in chambishi (Zambia) and diepsloot (South Africa) townships

Currently, 91% of the world population has access to clean and safe water. Despite this encouraging development exclusion and marginalisation of the poor appear not only to be deepening but fast spreading. Low-income communities in urban areas are increasingly grappling with issues of reliability, sufficiency, and affordability of potable water. Attaining SDG 6 and its targets goal is a daunting task for most developing nations and limited evidence provide an intrinsic look at water systems for marginalised urban communities. This study investigates factors influencing household water access, its reliability and affordability among the low-income communities. The study administered a structured questionnaire to 500 households to determine key predictors of household water access. Findings show persistent high unemployment levels with most of the people surviving on less than R 3000 (198 USD) a month. Around 66% of households had access to tap water either inside the house or yard, but the water supply was irregular, and most households were not paying for the water. Household water access and payment for water services were influenced by house type, household size and water source with a p value of 0.00, 0.035 and 0.042 respectively. Other variables such as education, employment, and income were not significant predictors of household's water access. The study observed that income, employment, education, gender, drinking tap water, water interruptions, and satisfaction levels did not have a significant relationship with household water payment for water services. The findings of this study highlight the importance of policy in driving water service provision for the successful attainment of Sustainable Development Goal 6.1. 

Analysis of the determinants of household's water access and payments among the urban poor. A case study of Diepsloot Township

John Siame

Papers

A review on geopolymers as emerging materials for the adsorption of heavy metals and dyes

Coarse-grained CFD-DEM simulations of fluidization with large particles

Effective Microporosity for Enhanced Adsorption Capacity of Cr (VI) from Dilute Aqueous Solution: Isotherm and Kinetics

Modeling energy requirements for a biogas-supported decentralized Water treatment systems for communities in chambishi (Zambia) and diepsloot (South Africa) townships

Analysis of the determinants of household's water access and payments among the urban poor. A case study of Diepsloot Township