Waste companies use different strategies to handle landfill leachate, the unpleasant cocktail produced by waste in landfills. A relatively new strategy involving waste-based adsorbents joins the mix. Until fairly recently, landfills have been our go-to solid waste disposal method. These days however, there is growing interest in identifying practical and cost-effective ways to minimise the amount of waste going into landfills or open dumpsites– preference is given to waste recycling or valorisation (i.e, turning waste into a resource). Many of us already do this on a small scale, when we choose to DIY our own compost. Or transform this afternoon’s roast turkey into tomorrow’s sandwich filler. Or reuse our shopping bags. Or use clear beer bottles as peanut containers, as is often the case in Nigeria. On a larger scale, many countries are thinking hard about sustainable waste management. For example, an old pair of trousers has potential to be more than landfill material; it can be
